Document:

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THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date:  May 17, 2005                                        Warrant No. A-1

      THIS CERTIFIES that The Dennis R. Sciotto Family Trust Dated DECEMBER 19,
1994, or any subsequent holder hereof (the "Holder"), has the right to purchase
from OMNI ENERGY SERVICES CORP., a Louisiana corporation (the "Company"), up to
2,553,600 fully paid and nonassessable shares of the Company's common stock, par
value $0.01 per share (the "Common Stock"), subject to adjustment as provided
herein, at a price per share equal to the Exercise Price (as defined below), at
any time beginning on the date hereof (the "the "Issue Date") and ending at 6:00
p.m., eastern time, on the date that is the fifth (5th) anniversary of the Issue
Date (the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $1.95, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the

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holders of Series C Convertible Preferred Stock ("Shareholder Approval"), in no
event shall the Exercise Price be less than $1.95, other than as a result of
adjustments for the events specified in Section 4(a) below. Payment of the
Exercise Price may be made either (i) in cash or by certified or official bank
check payable to the order of the Company equal to the applicable aggregate
Exercise Price, (ii) by cashless exercise in accordance with Section (c) below,
or (iii) by a combination of any of the foregoing methods, for the number of
Common Shares specified in such Exercise Notice (as defined below) (as such
exercise number shall be adjusted to reflect any adjustment in the total number
of shares of Common Stock issuable to the Holder per the terms of this Warrant).

      (c) Cashless Exercise. Notwithstanding any provisions herein to the
contrary, if the Company's Common Stock is publicly traded and the average
closing price (the "Market Price") of the Common Stock for the five (5) trading
days immediately preceding the Exercise Date (as defined below) is greater than
the then-current Exercise Price, in lieu of exercising this Warrant for cash,
the Holder may elect to receive shares equal to the value (as determined below)
of this Warrant (or the portion thereof being exercised) by surrender of this
Warrant at the principal office of the Company together with the properly
endorsed Exercise Notice in which event the Company shall issue to the Holder a
number of shares of Common Stock computed using the following formula:

                  X= Y(A-B)/A

         Where    X = the number of Warrant Shares to be issued to the Holder;

                  Y = the number of Warrant Shares with respect to which this
         Warrant is being exercised;

                  A = the Market Price of one share of the Company's Common
         Stock; and

                  B = Exercise Price.

      (d) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price, which shall not be required if the Exercise Notice indicates the Holder's
election to effect a cashless exercise. The Exercise Notice shall also state the
name or names (with address) in which the shares of Common Stock that are
issuable on such exercise shall be issued. In the case of a dispute as to the
calculation of the Exercise Price or the number of Warrant Shares issuable
hereunder (including, without limitation, the calculation of any adjustment
pursuant to Section 4 below), the Company shall promptly issue to the Holder the
number of Warrant Shares that are not disputed and shall submit the disputed
calculations to a certified public accounting firm of national recognition
(other than the Company's independent accountants), reasonably acceptable to
Holder, within two (2) business days following the date on which the Exercise
Notice is delivered to the Company. The Company shall cause such

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accountant to calculate the Exercise Price and/or the number of Warrant Shares
issuable hereunder and to notify the Company and the Holder of the results in
writing no later than three (3) business days following the day on which such
accountant received the disputed calculations (the "Dispute Procedure"). Such
accountant's calculation shall be deemed conclusive absent manifest error. The
fees of any such accountant shall be borne by the party whose calculations were
most at variance with those of such accountant.

      (e) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (f) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (g) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which
this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice, and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the

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Holder or its nominee physical certificates representing such Warrant Shares, no
later than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make delivery on a sale effected in
anticipation of receiving Warrant Shares upon exercise, such damages to be in an
amount equal to (A) the aggregate amount paid by the Holder for the Common Stock
so purchased minus (B) the aggregate amount of net proceeds, if any, received by
the Holder from the sale of the Warrant Shares issued by the Company pursuant to
such exercise), and the Holder shall have the right to pursue all remedies
available to it at law or in equity (including, without limitation, a decree of
specific performance and/or injunctive relief); provided, however, that, in the
event, following an Exercise Default, the Company delivers to the Holder the
Warrant Shares that are required to be issued by the Company pursuant to such
exercise, the Holder shall use commercially reasonable efforts to sell such
shares promptly following such delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization,

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reclassification or otherwise) its shares of Common Stock into a greater number
of shares, then after the date of record for effecting such subdivision, the
Exercise Price in effect immediately prior to such subdivision will be
proportionately reduced. Any adjustment made pursuant to the foregoing sentence
that results in a decrease in the Exercise Price shall also effect a
proportional increase in the number of Warrant Shares into which this Warrant is
exercisable. If the Company, at any time after the initial issuance of this
Warrant, combines (by reverse stock split, recapitalization, reorganization,
reclassification or otherwise) its shares of Common Stock into a smaller number
of shares, then, after the date of record for effecting such combination, the
Exercise Price in effect immediately prior to such combination will be
proportionally increased. Any adjustment made pursuant to the foregoing sentence
that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

          (i) Adjustment Upon Dilutive Issuance. If, at any time after the Issue
Date, the Company issues or sells, or in accordance with subparagraph (ii) of
this Section 4(c), is deemed to have issued or sold, any shares of Common Stock
for no consideration or for a consideration per share less than the Exercise
Price on the date of such issuance or sale (or deemed issuance or sale) (a
"Dilutive Issuance"), then effective immediately upon the Dilutive Issuance, the
Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                           N0 + N1
                           -------
                           N0 + N2

         where:

                           N0 =   the number of shares of Common Stock
                                  outstanding immediately prior to the issuance,
                                  sale or deemed issuance or sale of such
                                  additional shares of Common Stock in such
                                  Dilutive Issuance without taking into account
                                  any shares of Common Stock issuable upon
                                  conversion, exchange or exercise of any
                                  securities or other instruments which are

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                                  convertible into or exercisable or
                                  exchangeable for Common Stock ("Convertible
                                  Securities") or options, warrants or other
                                  rights to purchase or subscribe for Common
                                  Stock or Convertible Securities ("Purchase
                                  Rights");

                           N1 =   the number of shares of Common Stock
                                  which the aggregate consideration, if any,
                                  received or receivable by the Company for the
                                  total number of such additional shares of
                                  Common Stock so issued, sold or deemed issued
                                  or sold in such Dilutive Issuance (which, in
                                  the case of a deemed issuance or sale, shall
                                  be calculated in accordance with subparagraph
                                  (ii) below) would purchase at the Exercise
                                  Price in effect immediately prior to such
                                  Dilutive Issuance; and

                           N2 =   the number of such additional shares of
                                  Common Stock so issued, sold or deemed issued
                                  or sold in such Dilutive Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the date of the
      issuance or sale of such Purchase Rights, be deemed to have been issued
      and sold by the Company for such price per share. For purposes of the
      preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

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                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still
      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are

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      issued in connection with any merger or consolidation in which the Company
      is the surviving corporation, the amount of consideration therefor will be
      deemed to be the fair market value of such portion of the net assets and
      business of the non-surviving corporation as is attributable to such
      Common Stock, Purchase Rights or Convertible Securities, as the case may
      be. The independent members of the Company's Board of Directors shall
      calculate reasonably and in good faith, using standard commercial
      valuation methods appropriate for valuing such assets, the fair market
      value of any consideration other than cash or securities; provided,
      however, that if the Holder does not agree to such fair market value
      calculation within three business days after receipt thereof from the
      Company, then such fair market value shall be determined in good faith by
      an investment banker or other appropriate expert of national reputation
      selected by the Holder and reasonably acceptable to the Company, with the
      costs of such appraisal to be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the Investors named therein, each as amended,
      modified and supplemented; (7) 361,800 shares (200,000 shares to James C.
      Eckert and 161,800 shares to G. Darcy Klug) and 100,000 options (40,000
      options to James C. Eckert and 60,000 options to G. Darcy Klug); and (8)
      2,924,424 shares issuable upon exercise of currently outstanding warrants
      and "investor options" listed on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

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      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5.    Fractional Interests.

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6.    Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of

                                     - 9 -
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Warrant Shares to be covered by the part of this Warrant to be transferred to
each such person. Within three (3) business days of receiving a Transfer Notice
and the original of this Warrant, the Company shall deliver to the each
transferee designated by the Holder a Warrant or Warrants of like tenor and
terms for the appropriate number of Warrant Shares and, if less than all this
Warrant is transferred, shall deliver to the Holder a Warrant for the remaining
number of Warrant Shares.

      7.    Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8.    Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9.    Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                  If to the Company:

                  OMNI Energy Services Corp.
                  4500 NE Evangeline Thruway
                  Carencro, LA 70520
                  Attn: James C. Eckert
                  Tel: (337) 896-6664
                  Fax: (337) 896-6655

                  with a copy (not constituting notice) to:

                  Locke Liddell & Sapp LLP
                  600 Travis, Suite 3200
                  Houston, TX 77002
                  Attention: David F. Taylor, Esq.
                  Tel:  (713) 226-1496
                  Fax: (713) 223-3717

                                     - 10 -
<PAGE>

                  If to Holder:

                  At the address set forth below Holder's signature on the
                  Securities Purchase Agreement.

                  with a copy (not constituting notice) to:

                  Solomon Ward Seidenwurm & Smith, LLP
                  401 B Street, Suite 1200
                  San Diego, CA 92101
                  Attn:  Harry J. Proctor, Esq.
                  Tel:  (619) 231-0303
                  Fax:  (619) 231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11.   Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed in accordance with the laws of the State of Delaware applicable
to contracts made and to be performed entirely within the State of Delaware.

      12.   Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13.   Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

                                     - 11 -
<PAGE>

      14.   Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                     - 12 -
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                               OMNI ENERGY SERVICES CORP.

                                               By:  /s/ G. Darcy Klug
                                                    -------------------------
                                                    G. Darcy Klug
                                                    Executive Vice President

<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date:  May 17, 2005                                        Warrant No. A-2

      THIS CERTIFIES that Edward E. Colson, III Trust Dated january 2, 1995, or
any subsequent holder hereof (the "Holder"), has the right to purchase from OMNI
ENERGY SERVICES CORP., a Louisiana corporation (the "Company"), up to 268,800
fully paid and nonassessable shares of the Company's common stock, par value
$0.01 per share (the "Common Stock"), subject to adjustment as provided herein,
at a price per share equal to the Exercise Price (as defined below), at any time
beginning on the date hereof (the "the "Issue Date") and ending at 6:00 p.m.,
eastern time, on the date that is the fifth (5th) anniversary of the Issue Date
(the "Expiration Date").

      1.    Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $1.95, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made either (i) in cash or by certified or official bank check payable to the
order of the Company equal to the applicable aggregate Exercise Price, (ii) by
cashless exercise in accordance with Section (c) below, or (iii) by a
combination of any of the foregoing methods, for the number of Common Shares
specified in such Exercise Notice (as defined below) (as such exercise number
shall be adjusted to reflect any adjustment in the total number of shares of
Common Stock issuable to the Holder per the terms of this Warrant).

      (c) Cashless Exercise. Notwithstanding any provisions herein to the
contrary, if the Company's Common Stock is publicly traded and the average
closing price (the "Market Price") of the Common Stock for the five (5) trading
days immediately preceding the Exercise Date (as defined below) is greater than
the then-current Exercise Price, in lieu of exercising this Warrant for cash,
the Holder may elect to receive shares equal to the value (as determined below)
of this Warrant (or the portion thereof being exercised) by surrender of this
Warrant at the principal office of the Company together with the properly
endorsed Exercise Notice in which event the Company shall issue to the Holder a
number of shares of Common Stock computed using the following formula:

                  X= Y(A-B)/A

         Where    X =  the number of Warrant Shares to be issued to the Holder;

                  Y = the number of Warrant Shares with respect to which this
         Warrant is being exercised;

                  A = the Market Price of one share of the Company's Common
         Stock; and

                  B =  Exercise Price.

      (d) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price, which shall not be required if the Exercise Notice indicates the Holder's
election to effect a cashless exercise. The Exercise Notice shall also state the
name or names (with address) in which the shares of Common Stock that are
issuable on such exercise shall be issued. In the case of a dispute as to the
calculation of the Exercise Price or the number of Warrant Shares issuable
hereunder (including, without limitation, the calculation of any adjustment
pursuant to Section 4 below), the Company shall promptly issue to the Holder the
number of Warrant Shares that are not disputed and shall submit the disputed
calculations to a certified public accounting firm of national recognition
(other than the Company's independent accountants), reasonably acceptable to
Holder, within two (2) business days following the date on which the Exercise
Notice is delivered to the Company. The Company shall cause such accountant to
calculate the Exercise Price and/or the number of Warrant Shares issuable
hereunder

                                      - 2 -
<PAGE>

and to notify the Company and the Holder of the results in writing no later than
three (3) business days following the day on which such accountant received the
disputed calculations (the "Dispute Procedure"). Such accountant's calculation
shall be deemed conclusive absent manifest error. The fees of any such
accountant shall be borne by the party whose calculations were most at variance
with those of such accountant.

      (e) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (f) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (g) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which
this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice, and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close

                                      - 3 -
<PAGE>

of business on such Delivery Date.

      3.    Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make delivery on a sale effected in
anticipation of receiving Warrant Shares upon exercise, such damages to be in an
amount equal to (A) the aggregate amount paid by the Holder for the Common Stock
so purchased minus (B) the aggregate amount of net proceeds, if any, received by
the Holder from the sale of the Warrant Shares issued by the Company pursuant to
such exercise), and the Holder shall have the right to pursue all remedies
available to it at law or in equity (including, without limitation, a decree of
specific performance and/or injunctive relief); provided, however, that, in the
event, following an Exercise Default, the Company delivers to the Holder the
Warrant Shares that are required to be issued by the Company pursuant to such
exercise, the Holder shall use commercially reasonable efforts to sell such
shares promptly following such delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after

                                      - 4 -
<PAGE>

the date of record for effecting such subdivision, the Exercise Price in effect
immediately prior to such subdivision will be proportionately reduced. Any
adjustment made pursuant to the foregoing sentence that results in a decrease in
the Exercise Price shall also effect a proportional increase in the number of
Warrant Shares into which this Warrant is exercisable. If the Company, at any
time after the initial issuance of this Warrant, combines (by reverse stock
split, recapitalization, reorganization, reclassification or otherwise) its
shares of Common Stock into a smaller number of shares, then, after the date of
record for effecting such combination, the Exercise Price in effect immediately
prior to such combination will be proportionally increased. Any adjustment made
pursuant to the foregoing sentence that results in an increase in the Exercise
Price shall also effect a proportional decrease in the number of Warrant Shares
into which this Warrant is exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c)   Dilutive Issuances.

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                           N0 + N1
                           -------
                           N0 + N2

         where:

                           N0 =   the number of shares of Common Stock
                                  outstanding immediately prior to the issuance,
                                  sale or deemed issuance or sale of such
                                  additional shares of Common Stock in such
                                  Dilutive Issuance without taking into account
                                  any shares of Common Stock issuable upon
                                  conversion, exchange or exercise of any
                                  securities or other instruments which are
                                  convertible into or exercisable or
                                  exchangeable for Common Stock

                                      - 5 -
<PAGE>

                                  ("Convertible Securities") or options,
                                  warrants or other rights to purchase or
                                  subscribe for Common Stock or Convertible
                                  Securities ("Purchase Rights");

                           N1 =   the number of shares of Common Stock
                                  which the aggregate consideration, if any,
                                  received or receivable by the Company for the
                                  total number of such additional shares of
                                  Common Stock so issued, sold or deemed issued
                                  or sold in such Dilutive Issuance (which, in
                                  the case of a deemed issuance or sale, shall
                                  be calculated in accordance with subparagraph
                                  (ii) below) would purchase at the Exercise
                                  Price in effect immediately prior to such
                                  Dilutive Issuance; and

                           N2 =   the number of such additional shares of
                                  Common Stock so issued, sold or deemed
                                  issued or sold in such Dilutive Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the date of the
      issuance or sale of such Purchase Rights, be deemed to have been issued
      and sold by the Company for such price per share. For purposes of the
      preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells

                                     - 7 -
<PAGE>

      any Convertible Securities, whether or not immediately convertible,
      exercisable or exchangeable, and the price per share for which Common
      Stock is issuable upon such conversion, exercise or exchange is less than
      the Exercise Price in effect on the date of issuance or sale of such
      Convertible Securities, then the maximum total number of shares of Common
      Stock issuable upon the conversion, exercise or exchange of all such
      Convertible Securities shall, as of the date of the issuance or sale of
      such Convertible Securities, be deemed to have been issued and sold by the
      Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

            (C) Change In Option Price Or Conversion Rate. If there is a change
      at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still
      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

            (D) Calculation Of Consideration Received. If any Common Stock,
      Purchase Rights or Convertible Securities are issued or sold for cash, the
      consideration received therefor will be the amount received by the Company
      therefor, after deduction of all underwriting discounts or allowances in
      connection with such issuance, grant or sale. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued or sold for a
      consideration part or all of which shall be other than cash, including in
      the case of a strategic or similar arrangement in which the other entity
      will provide services to the Company, purchase services from the Company
      or otherwise provide intangible consideration to the Company, the amount
      of the consideration other than cash received by the Company (including
      the net present value of the consideration expected by the Company for the
      provided or purchased services) shall be the fair market value of such
      consideration, except where such consideration consists of securities, in
      which case the amount of consideration received by the Company will be the
      average of the last sale prices thereof on the principal market for such
      securities during the period of ten Trading Days immediately preceding the
      date of receipt. In case any Common Stock, Purchase Rights or Convertible
      Securities are issued in connection with any merger or consolidation in
      which the Company is the

                                     - 8 -
<PAGE>

      surviving corporation, the amount of consideration therefor will be deemed
      to be the fair market value of such portion of the net assets and business
      of the non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

            (iii) Exceptions To Adjustment Of Exercise Price. Notwithstanding
the foregoing, no adjustment to the Exercise Price shall be made pursuant to
this Section 4(c) upon the issuance of any Excluded Securities. For purposes
hereof, "Excluded Securities" means (1) securities purchased under the
Securities Purchase Agreement; (2) securities issued upon conversion or exercise
of the Series C 9% Convertible Preferred Stock or the Warrants (as defined in
the Securities Purchase Agreement); (3) shares of Common Stock issuable or
issued to employees, consultants or directors from time to time upon the
exercise of options, in such case granted or to be granted in the discretion of
the Board of Directors pursuant to one or more stock option plans or restricted
stock plans in effect as of the Issue Date; (4) shares of Common Stock issued in
connection with any stock split, stock dividend or recapitalization of the
Company; (5) securities issued upon conversion of outstanding shares of Series B
8% Convertible Preferred Stock, provided that the terms of such preferred stock
have not been amended since the date hereof; (6) securities issued upon
conversion or exercise of Debentures or Warrants issued under the Securities
Purchase Agreement, dated as of February 12, 2004, between the Company and the
Investors named therein and the Securities Purchase Agreement, dated as of April
15, 2004, between the Company and the Investors named therein, each as amended,
modified and supplemented; (7) 361,800 shares (200,000 shares to James C. Eckert
and 161,800 shares to G. Darcy Klug) and 100,000 options (40,000 options to
James C. Eckert and 60,000 options to G. Darcy Klug); and (8) 2,924,424 shares
issuable upon exercise of currently outstanding warrants and "investor options"
listed on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination,

                                      - 8 -
<PAGE>

tender offer, exchange of shares, recapitalization, reorganization, redemption
or other similar event, as a result of which shares of Common Stock of the
Company shall be changed into the same or a different number of shares of the
same or another class or classes of stock or securities or other assets of the
Company or another entity or the Company shall sell all or substantially all of
its assets (each of the foregoing being a "Major Transaction"), the Company will
give the Holder at least twenty (20) days written notice prior to the closing of
such Major Transaction in a manner that does not constitute disclosure of
material non-public information (unless otherwise previously consented to in
writing by the Holder), and: (i) the Holder shall be permitted to exercise this
Warrant in whole or in part at any time prior to the record date for the receipt
of such consideration and shall be entitled to receive, for each share of Common
Stock issuable to Holder for such exercise, the same per share consideration
payable to the other holders of Common Stock in connection with such Major
Transaction, and (ii) if and to the extent that the Holder retains any portion
of this Warrant following such record date, the Company will cause the surviving
or, in the event of a sale of assets, purchasing entity, as a condition
precedent to such Major Transaction, to assume the obligations of the Company
under this Warrant, with such adjustments to the Exercise Price and the
securities covered hereby as may be necessary in order to preserve the economic
benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5.    Fractional Interests.

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6.    Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person.

                                     - 9 -
<PAGE>

Within three (3) business days of receiving a Transfer Notice and the original
of this Warrant, the Company shall deliver to the each transferee designated by
the Holder a Warrant or Warrants of like tenor and terms for the appropriate
number of Warrant Shares and, if less than all this Warrant is transferred,
shall deliver to the Holder a Warrant for the remaining number of Warrant
Shares.

      7.    Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8.    Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9.    Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                  If to the Company:

                  OMNI Energy Services Corp.
                  4500 NE Evangeline Thruway
                  Carencro, LA 70520
                  Attn: James C. Eckert
                  Tel: (337) 896-6664
                  Fax: (337) 896-6655

                  with a copy (not constituting notice) to:

                  Locke Liddell & Sapp LLP
                  600 Travis, Suite 3200
                  Houston, TX 77002
                  Attention: David F. Taylor, Esq.
                  Tel:  (713) 226-1496
                  Fax: (713) 223-3717

                                     - 10 -
<PAGE>

                  If to Holder:

                  At the address set forth below Holder's signature on the
                  Securities Purchase Agreement.

                  with a copy (not constituting notice) to:

                  Solomon Ward Seidenwurm & Smith, LLP
                  401 B Street, Suite 1200
                  San Diego, CA 92101
                  Attn:  Harry J. Proctor, Esq.
                  Tel:  (619) 231-0303
                  Fax:  (619) 231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11.   Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed in accordance with the laws of the State of Delaware applicable
to contracts made and to be performed entirely within the State of Delaware.

      12.   Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13.   Entire Agreement.

            This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

                                     - 11 -
<PAGE>

      14.   Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                     - 12 -
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                         OMNI ENERGY SERVICES CORP.

                                         By: /s/ G. Darcy Klug
                                             -----------------
                                             G. Darcy Klug

<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date:  May 17, 2005                                        Warrant No. A-3

      THIS CERTIFIES that Jimit Mehta, or any subsequent holder hereof (the
"Holder"), has the right to purchase from OMNI ENERGY SERVICES CORP., a
Louisiana corporation (the "Company"), up to 201,600 fully paid and
nonassessable shares of the Company's common stock, par value $0.01 per share
(the "Common Stock"), subject to adjustment as provided herein, at a price per
share equal to the Exercise Price (as defined below), at any time beginning on
the date hereof (the "the "Issue Date") and ending at 6:00 p.m., eastern time,
on the date that is the fifth (5th) anniversary of the Issue Date (the
"Expiration Date").

      1.    Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $1.95, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made either (i) in cash or by certified or official bank check payable to the
order of the Company equal to the applicable aggregate Exercise Price, (ii) by
cashless exercise in accordance with Section (c) below, or (iii) by a
combination of any of the foregoing methods, for the number of Common Shares
specified in such Exercise Notice (as defined below) (as such exercise number
shall be adjusted to reflect any adjustment in the total number of shares of
Common Stock issuable to the Holder per the terms of this Warrant).

      (c) Cashless Exercise. Notwithstanding any provisions herein to the
contrary, if the Company's Common Stock is publicly traded and the average
closing price (the "Market Price") of the Common Stock for the five (5) trading
days immediately preceding the Exercise Date (as defined below) is greater than
the then-current Exercise Price, in lieu of exercising this Warrant for cash,
the Holder may elect to receive shares equal to the value (as determined below)
of this Warrant (or the portion thereof being exercised) by surrender of this
Warrant at the principal office of the Company together with the properly
endorsed Exercise Notice in which event the Company shall issue to the Holder a
number of shares of Common Stock computed using the following formula:

                  X= Y(A-B)/A

            Where X = the number of Warrant Shares to be issued to the Holder;

                  Y = the number of Warrant Shares with respect to which this
            Warrant is being exercised;

                  A = the Market Price of one share of the Company's Common
            Stock; and

                  B =  Exercise Price.

      (d) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price, which shall not be required if the Exercise Notice indicates the Holder's
election to effect a cashless exercise. The Exercise Notice shall also state the
name or names (with address) in which the shares of Common Stock that are
issuable on such exercise shall be issued. In the case of a dispute as to the
calculation of the Exercise Price or the number of Warrant Shares issuable
hereunder (including, without limitation, the calculation of any adjustment
pursuant to Section 4 below), the Company shall promptly issue to the Holder the
number of Warrant Shares that are not disputed and shall submit the disputed
calculations to a certified public accounting firm of national recognition
(other than the Company's independent accountants), reasonably acceptable to
Holder, within two (2) business days following the date on which the Exercise
Notice is delivered to the Company. The Company shall cause such accountant to
calculate the Exercise Price and/or the number of Warrant Shares issuable
hereunder

                                     - 2 -
<PAGE>

and to notify the Company and the Holder of the results in writing no later than
three (3) business days following the day on which such accountant received the
disputed calculations (the "Dispute Procedure"). Such accountant's calculation
shall be deemed conclusive absent manifest error. The fees of any such
accountant shall be borne by the party whose calculations were most at variance
with those of such accountant.

      (e) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (f) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (g) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which
this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice, and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close

                                     - 3 -
<PAGE>

of business on such Delivery Date.

      3.    Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make delivery on a sale effected in
anticipation of receiving Warrant Shares upon exercise, such damages to be in an
amount equal to (A) the aggregate amount paid by the Holder for the Common Stock
so purchased minus (B) the aggregate amount of net proceeds, if any, received by
the Holder from the sale of the Warrant Shares issued by the Company pursuant to
such exercise), and the Holder shall have the right to pursue all remedies
available to it at law or in equity (including, without limitation, a decree of
specific performance and/or injunctive relief); provided, however, that, in the
event, following an Exercise Default, the Company delivers to the Holder the
Warrant Shares that are required to be issued by the Company pursuant to such
exercise, the Holder shall use commercially reasonable efforts to sell such
shares promptly following such delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after

                                     - 4 -
<PAGE>

the date of record for effecting such subdivision, the Exercise Price in effect
immediately prior to such subdivision will be proportionately reduced. Any
adjustment made pursuant to the foregoing sentence that results in a decrease in
the Exercise Price shall also effect a proportional increase in the number of
Warrant Shares into which this Warrant is exercisable. If the Company, at any
time after the initial issuance of this Warrant, combines (by reverse stock
split, recapitalization, reorganization, reclassification or otherwise) its
shares of Common Stock into a smaller number of shares, then, after the date of
record for effecting such combination, the Exercise Price in effect immediately
prior to such combination will be proportionally increased. Any adjustment made
pursuant to the foregoing sentence that results in an increase in the Exercise
Price shall also effect a proportional decrease in the number of Warrant Shares
into which this Warrant is exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                           N0 + N1
                           -------
                           N0 + N2

         where:

                           N0 =   the number of shares of Common Stock
                                  outstanding immediately prior to the issuance,
                                  sale or deemed issuance or sale of such
                                  additional shares of Common Stock in such
                                  Dilutive Issuance without taking into account
                                  any shares of Common Stock issuable upon
                                  conversion, exchange or exercise of any
                                  securities or other instruments which are
                                  convertible into or exercisable or
                                  exchangeable for Common Stock

                                     - 5 -
<PAGE>

                                  ("Convertible Securities") or options,
                                  warrants or other rights to purchase or
                                  subscribe for Common Stock or Convertible
                                  Securities ("Purchase Rights");

                           N1 =   the number of shares of Common Stock
                                  which the aggregate consideration, if any,
                                  received or receivable by the Company for the
                                  total number of such additional shares of
                                  Common Stock so issued, sold or deemed issued
                                  or sold in such Dilutive Issuance (which, in
                                  the case of a deemed issuance or sale, shall
                                  be calculated in accordance with subparagraph
                                  (ii) below) would purchase at the Exercise
                                  Price in effect immediately prior to such
                                  Dilutive Issuance; and

                           N2 =   the number of such additional shares of
                                  Common Stock so issued, sold or deemed issued
                                  or sold in such Dilutive Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the date of the
      issuance or sale of such Purchase Rights, be deemed to have been issued
      and sold by the Company for such price per share. For purposes of the
      preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells

                                     - 6 -
<PAGE>

      any Convertible Securities, whether or not immediately convertible,
      exercisable or exchangeable, and the price per share for which Common
      Stock is issuable upon such conversion, exercise or exchange is less than
      the Exercise Price in effect on the date of issuance or sale of such
      Convertible Securities, then the maximum total number of shares of Common
      Stock issuable upon the conversion, exercise or exchange of all such
      Convertible Securities shall, as of the date of the issuance or sale of
      such Convertible Securities, be deemed to have been issued and sold by the
      Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still
      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the

                                     - 7 -
<PAGE>

      surviving corporation, the amount of consideration therefor will be deemed
      to be the fair market value of such portion of the net assets and business
      of the non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the Investors named therein, each as amended,
      modified and supplemented; (7) 361,800 shares (200,000 shares to James C.
      Eckert and 161,800 shares to G. Darcy Klug) and 100,000 options (40,000
      options to James C. Eckert and 60,000 options to G. Darcy Klug); and (8)
      2,924,424 shares issuable upon exercise of currently outstanding warrants
      and "investor options" listed on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination,

                                     - 8 -
<PAGE>

tender offer, exchange of shares, recapitalization, reorganization, redemption
or other similar event, as a result of which shares of Common Stock of the
Company shall be changed into the same or a different number of shares of the
same or another class or classes of stock or securities or other assets of the
Company or another entity or the Company shall sell all or substantially all of
its assets (each of the foregoing being a "Major Transaction"), the Company will
give the Holder at least twenty (20) days written notice prior to the closing of
such Major Transaction in a manner that does not constitute disclosure of
material non-public information (unless otherwise previously consented to in
writing by the Holder), and: (i) the Holder shall be permitted to exercise this
Warrant in whole or in part at any time prior to the record date for the receipt
of such consideration and shall be entitled to receive, for each share of Common
Stock issuable to Holder for such exercise, the same per share consideration
payable to the other holders of Common Stock in connection with such Major
Transaction, and (ii) if and to the extent that the Holder retains any portion
of this Warrant following such record date, the Company will cause the surviving
or, in the event of a sale of assets, purchasing entity, as a condition
precedent to such Major Transaction, to assume the obligations of the Company
under this Warrant, with such adjustments to the Exercise Price and the
securities covered hereby as may be necessary in order to preserve the economic
benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5.    Fractional Interests.

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6.    Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person.

                                     - 9 -
<PAGE>

Within three (3) business days of receiving a Transfer Notice and the original
of this Warrant, the Company shall deliver to the each transferee designated by
the Holder a Warrant or Warrants of like tenor and terms for the appropriate
number of Warrant Shares and, if less than all this Warrant is transferred,
shall deliver to the Holder a Warrant for the remaining number of Warrant
Shares.

      7.    Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8.    Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9.    Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                  If to the Company:

                  OMNI Energy Services Corp.
                  4500 NE Evangeline Thruway
                  Carencro, LA 70520
                  Attn: James C. Eckert
                  Tel: (337) 896-6664
                  Fax: (337) 896-6655

                  with a copy (not constituting notice) to:

                  Locke Liddell & Sapp LLP
                  600 Travis, Suite 3200
                  Houston, TX 77002
                  Attention: David F. Taylor, Esq.
                  Tel:  (713) 226-1496
                  Fax: (713) 223-3717

                                     - 10 -
<PAGE>

                  If to Holder:

                  At the address set forth below Holder's signature on the
                  Securities Purchase Agreement.

                  with a copy (not constituting notice) to:

                  Solomon Ward Seidenwurm & Smith, LLP
                  401 B Street, Suite 1200
                  San Diego, CA 92101
                  Attn:  Harry J. Proctor, Esq.
                  Tel:  (619) 231-0303
                  Fax:  (619) 231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11.   Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed in accordance with the laws of the State of Delaware applicable
to contracts made and to be performed entirely within the State of Delaware.

      12.   Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13.   Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

                                     - 11 -
<PAGE>

      14.   Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                     - 12 -
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                             OMNI ENERGY SERVICES CORP.

                                             By: /s/ G. Darcy Klug
                                                 ------------------------
                                                 G. Darcy Klug
                                                 Executive Vice President

<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date:  May 17, 2005                                       Warrant No. A-4

      THIS CERTIFIES that JAMES C. ECKERT, or any subsequent holder hereof (the
"Holder"), has the right to purchase from OMNI ENERGY SERVICES CORP., a
Louisiana corporation (the "Company"), up to 168,000 fully paid and
nonassessable shares of the Company's common stock, par value $0.01 per share
(the "Common Stock"), subject to adjustment as provided herein, at a price per
share equal to the Exercise Price (as defined below), at any time beginning on
the date hereof (the "the "Issue Date") and ending at 6:00 p.m., eastern time,
on the date that is the fifth (5th) anniversary of the Issue Date (the
"Expiration Date").

      1.    Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $1.95, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made either (i) in cash or by certified or official bank check payable to the
order of the Company equal to the applicable aggregate Exercise Price, (ii) by
cashless exercise in accordance with Section (c) below, or (iii) by a
combination of any of the foregoing methods, for the number of Common Shares
specified in such Exercise Notice (as defined below) (as such exercise number
shall be adjusted to reflect any adjustment in the total number of shares of
Common Stock issuable to the Holder per the terms of this Warrant).

      (c) Cashless Exercise. Notwithstanding any provisions herein to the
contrary, if the Company's Common Stock is publicly traded and the average
closing price (the "Market Price") of the Common Stock for the five (5) trading
days immediately preceding the Exercise Date (as defined below) is greater than
the then-current Exercise Price, in lieu of exercising this Warrant for cash,
the Holder may elect to receive shares equal to the value (as determined below)
of this Warrant (or the portion thereof being exercised) by surrender of this
Warrant at the principal office of the Company together with the properly
endorsed Exercise Notice in which event the Company shall issue to the Holder a
number of shares of Common Stock computed using the following formula:

                  X= Y(A-B)/A

         Where    X =  the number of Warrant Shares to be issued to the Holder;

                  Y = the number of Warrant Shares with respect to which this
         Warrant is being exercised;

                  A = the Market Price of one share of the Company's Common
         Stock; and

                  B =  Exercise Price.

      (d) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price, which shall not be required if the Exercise Notice indicates the Holder's
election to effect a cashless exercise. The Exercise Notice shall also state the
name or names (with address) in which the shares of Common Stock that are
issuable on such exercise shall be issued. In the case of a dispute as to the
calculation of the Exercise Price or the number of Warrant Shares issuable
hereunder (including, without limitation, the calculation of any adjustment
pursuant to Section 4 below), the Company shall promptly issue to the Holder the
number of Warrant Shares that are not disputed and shall submit the disputed
calculations to a certified public accounting firm of national recognition
(other than the Company's independent accountants), reasonably acceptable to
Holder, within two (2) business days following the date on which the Exercise
Notice is delivered to the Company. The Company shall cause such accountant to
calculate the Exercise Price and/or the number of Warrant Shares issuable
hereunder

                                     - 2 -
<PAGE>

and to notify the Company and the Holder of the results in writing no later than
three (3) business days following the day on which such accountant received the
disputed calculations (the "Dispute Procedure"). Such accountant's calculation
shall be deemed conclusive absent manifest error. The fees of any such
accountant shall be borne by the party whose calculations were most at variance
with those of such accountant.

      (e) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (f) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (g) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which
this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice, and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close

                                     - 3 -
<PAGE>

of business on such Delivery Date.

      3.    Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make delivery on a sale effected in
anticipation of receiving Warrant Shares upon exercise, such damages to be in an
amount equal to (A) the aggregate amount paid by the Holder for the Common Stock
so purchased minus (B) the aggregate amount of net proceeds, if any, received by
the Holder from the sale of the Warrant Shares issued by the Company pursuant to
such exercise), and the Holder shall have the right to pursue all remedies
available to it at law or in equity (including, without limitation, a decree of
specific performance and/or injunctive relief); provided, however, that, in the
event, following an Exercise Default, the Company delivers to the Holder the
Warrant Shares that are required to be issued by the Company pursuant to such
exercise, the Holder shall use commercially reasonable efforts to sell such
shares promptly following such delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after

                                     - 4 -
<PAGE>
the date of record for effecting such subdivision, the Exercise Price in effect
immediately prior to such subdivision will be proportionately reduced. Any
adjustment made pursuant to the foregoing sentence that results in a decrease in
the Exercise Price shall also effect a proportional increase in the number of
Warrant Shares into which this Warrant is exercisable. If the Company, at any
time after the initial issuance of this Warrant, combines (by reverse stock
split, recapitalization, reorganization, reclassification or otherwise) its
shares of Common Stock into a smaller number of shares, then, after the date of
record for effecting such combination, the Exercise Price in effect immediately
prior to such combination will be proportionally increased. Any adjustment made
pursuant to the foregoing sentence that results in an increase in the Exercise
Price shall also effect a proportional decrease in the number of Warrant Shares
into which this Warrant is exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                           N0 + N1
                           -------
                           N0 + N2

         where:

                           N0 =   the number of shares of Common Stock
                                  outstanding immediately prior to the issuance,
                                  sale or deemed issuance or sale of such
                                  additional shares of Common Stock in such
                                  Dilutive Issuance without taking into account
                                  any shares of Common Stock issuable upon
                                  conversion, exchange or exercise of any
                                  securities or other instruments which are
                                  convertible into or exercisable or
                                  exchangeable for Common Stock

                                     - 5 -
<PAGE>

                                  ("Convertible Securities") or options,
                                  warrants or other rights to purchase or
                                  subscribe for Common Stock or Convertible
                                  Securities ("Purchase Rights");

                           N1 =   the number of shares of Common Stock
                                  which the aggregate consideration, if any,
                                  received or receivable by the Company for the
                                  total number of such additional shares of
                                  Common Stock so issued, sold or deemed issued
                                  or sold in such Dilutive Issuance (which, in
                                  the case of a deemed issuance or sale, shall
                                  be calculated in accordance with subparagraph
                                  (ii) below) would purchase at the Exercise
                                  Price in effect immediately prior to such
                                  Dilutive Issuance; and

                           N2 =   the number of such additional shares of
                                  Common Stock so issued, sold or deemed issued
                                  or sold in such Dilutive Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the date of the
      issuance or sale of such Purchase Rights, be deemed to have been issued
      and sold by the Company for such price per share. For purposes of the
      preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells

                                     - 6 -
<PAGE>

      any Convertible Securities, whether or not immediately convertible,
      exercisable or exchangeable, and the price per share for which Common
      Stock is issuable upon such conversion, exercise or exchange is less than
      the Exercise Price in effect on the date of issuance or sale of such
      Convertible Securities, then the maximum total number of shares of Common
      Stock issuable upon the conversion, exercise or exchange of all such
      Convertible Securities shall, as of the date of the issuance or sale of
      such Convertible Securities, be deemed to have been issued and sold by the
      Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still
      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the

                                     - 7 -
<PAGE>

      surviving corporation, the amount of consideration therefor will be deemed
      to be the fair market value of such portion of the net assets and business
      of the non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the Investors named therein, each as amended,
      modified and supplemented; (7) 361,800 shares (200,000 shares to James C.
      Eckert and 161,800 shares to G. Darcy Klug) and 100,000 options (40,000
      options to James C. Eckert and 60,000 options to G. Darcy Klug); and (8)
      2,924,424 shares issuable upon exercise of currently outstanding warrants
      and "investor options" listed on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination,

                                     - 8 -
<PAGE>

tender offer, exchange of shares, recapitalization, reorganization, redemption
or other similar event, as a result of which shares of Common Stock of the
Company shall be changed into the same or a different number of shares of the
same or another class or classes of stock or securities or other assets of the
Company or another entity or the Company shall sell all or substantially all of
its assets (each of the foregoing being a "Major Transaction"), the Company will
give the Holder at least twenty (20) days written notice prior to the closing of
such Major Transaction in a manner that does not constitute disclosure of
material non-public information (unless otherwise previously consented to in
writing by the Holder), and: (i) the Holder shall be permitted to exercise this
Warrant in whole or in part at any time prior to the record date for the receipt
of such consideration and shall be entitled to receive, for each share of Common
Stock issuable to Holder for such exercise, the same per share consideration
payable to the other holders of Common Stock in connection with such Major
Transaction, and (ii) if and to the extent that the Holder retains any portion
of this Warrant following such record date, the Company will cause the surviving
or, in the event of a sale of assets, purchasing entity, as a condition
precedent to such Major Transaction, to assume the obligations of the Company
under this Warrant, with such adjustments to the Exercise Price and the
securities covered hereby as may be necessary in order to preserve the economic
benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5.    Fractional Interests.

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6.    Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person.

                                     - 9 -
<PAGE>

Within three (3) business days of receiving a Transfer Notice and the original
of this Warrant, the Company shall deliver to the each transferee designated by
the Holder a Warrant or Warrants of like tenor and terms for the appropriate
number of Warrant Shares and, if less than all this Warrant is transferred,
shall deliver to the Holder a Warrant for the remaining number of Warrant
Shares.

      7.    Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8.    Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9.    Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                  If to the Company:

                  OMNI Energy Services Corp.
                  4500 NE Evangeline Thruway
                  Carencro, LA 70520
                  Attn: James C. Eckert
                  Tel: (337) 896-6664
                  Fax: (337) 896-6655

                  with a copy (not constituting notice) to:

                  Locke Liddell & Sapp LLP
                  600 Travis, Suite 3200
                  Houston, TX 77002
                  Attention: David F. Taylor, Esq.
                  Tel:  (713) 226-1496
                  Fax: (713) 223-3717

                                     - 10 -
<PAGE>

                  If to Holder:

                  At the address set forth below Holder's signature on the
                  Securities Purchase Agreement.

                  with a copy (not constituting notice) to:

                  Solomon Ward Seidenwurm & Smith, LLP
                  401 B Street, Suite 1200
                  San Diego, CA 92101
                  Attn:  Harry J. Proctor, Esq.
                  Tel:  (619) 231-0303
                  Fax:  (619) 231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11.   Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed in accordance with the laws of the State of Delaware applicable
to contracts made and to be performed entirely within the State of Delaware.

      12.   Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13.   Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

                                     - 11 -
<PAGE>

      14.   Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                     - 12 -
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                                  OMNI ENERGY SERVICES CORP.

                                                  By:  /s/ G. Darcy Klug
                                                       -------------------------
                                                       G. Darcy Klug
                                                       Executive Vice President

<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date:  May 17, 2005                                        Warrant No. A-5

      THIS CERTIFIES that G. DARCY KLUG, or any subsequent holder hereof (the
"Holder"), has the right to purchase from OMNI ENERGY SERVICES CORP., a
Louisiana corporation (the "Company"), up to 168,000 fully paid and
nonassessable shares of the Company's common stock, par value $0.01 per share
(the "Common Stock"), subject to adjustment as provided herein, at a price per
share equal to the Exercise Price (as defined below), at any time beginning on
the date hereof (the "the "Issue Date") and ending at 6:00 p.m., eastern time,
on the date that is the fifth (5th) anniversary of the Issue Date (the
"Expiration Date").

      1.    Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $1.95, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made either (i) in cash or by certified or official bank check payable to the
order of the Company equal to the applicable aggregate Exercise Price, (ii) by
cashless exercise in accordance with Section (c) below, or (iii) by a
combination of any of the foregoing methods, for the number of Common Shares
specified in such Exercise Notice (as defined below) (as such exercise number
shall be adjusted to reflect any adjustment in the total number of shares of
Common Stock issuable to the Holder per the terms of this Warrant).

      (c) Cashless Exercise. Notwithstanding any provisions herein to the
contrary, if the Company's Common Stock is publicly traded and the average
closing price (the "Market Price") of the Common Stock for the five (5) trading
days immediately preceding the Exercise Date (as defined below) is greater than
the then-current Exercise Price, in lieu of exercising this Warrant for cash,
the Holder may elect to receive shares equal to the value (as determined below)
of this Warrant (or the portion thereof being exercised) by surrender of this
Warrant at the principal office of the Company together with the properly
endorsed Exercise Notice in which event the Company shall issue to the Holder a
number of shares of Common Stock computed using the following formula:

                  X= Y(A-B)/A

  Where    X = the number of Warrant Shares to be issued to the Holder;

           Y = the number of Warrant Shares with respect to which this Warrant
  is being exercised;

           A = the Market Price of one share of the Company's Common Stock; and

           B = Exercise Price.

      (d) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price, which shall not be required if the Exercise Notice indicates the Holder's
election to effect a cashless exercise. The Exercise Notice shall also state the
name or names (with address) in which the shares of Common Stock that are
issuable on such exercise shall be issued. In the case of a dispute as to the
calculation of the Exercise Price or the number of Warrant Shares issuable
hereunder (including, without limitation, the calculation of any adjustment
pursuant to Section 4 below), the Company shall promptly issue to the Holder the
number of Warrant Shares that are not disputed and shall submit the disputed
calculations to a certified public accounting firm of national recognition
(other than the Company's independent accountants), reasonably acceptable to
Holder, within two (2) business days following the date on which the Exercise
Notice is delivered to the Company. The Company shall cause such accountant to
calculate the Exercise Price and/or the number of Warrant Shares issuable
hereunder

                                     - 2 -
<PAGE>

and to notify the Company and the Holder of the results in writing no later
than three (3) business days following the day on which such accountant received
the disputed calculations (the "Dispute Procedure"). Such accountant's
calculation shall be deemed conclusive absent manifest error. The fees of any
such accountant shall be borne by the party whose calculations were most at
variance with those of such accountant.

      (e) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (f) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (g) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which
this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice, and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close

                                     - 3 -
<PAGE>

of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make delivery on a sale effected in
anticipation of receiving Warrant Shares upon exercise, such damages to be in an
amount equal to (A) the aggregate amount paid by the Holder for the Common Stock
so purchased minus (B) the aggregate amount of net proceeds, if any, received by
the Holder from the sale of the Warrant Shares issued by the Company pursuant to
such exercise), and the Holder shall have the right to pursue all remedies
available to it at law or in equity (including, without limitation, a decree of
specific performance and/or injunctive relief); provided, however, that, in the
event, following an Exercise Default, the Company delivers to the Holder the
Warrant Shares that are required to be issued by the Company pursuant to such
exercise, the Holder shall use commercially reasonable efforts to sell such
shares promptly following such delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after

                                     - 4 -
<PAGE>

the date of record for effecting such subdivision, the Exercise Price in effect
immediately prior to such subdivision will be proportionately reduced. Any
adjustment made pursuant to the foregoing sentence that results in a decrease in
the Exercise Price shall also effect a proportional increase in the number of
Warrant Shares into which this Warrant is exercisable. If the Company, at any
time after the initial issuance of this Warrant, combines (by reverse stock
split, recapitalization, reorganization, reclassification or otherwise) its
shares of Common Stock into a smaller number of shares, then, after the date of
record for effecting such combination, the Exercise Price in effect immediately
prior to such combination will be proportionally increased. Any adjustment made
pursuant to the foregoing sentence that results in an increase in the Exercise
Price shall also effect a proportional decrease in the number of Warrant Shares
into which this Warrant is exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                           N0 + N1
                           -------
                           N0 + N2

         where:

                           N0 =   the number of shares of Common Stock
                                  outstanding immediately prior to the issuance,
                                  sale or deemed issuance or sale of such
                                  additional shares of Common Stock in such
                                  Dilutive Issuance without taking into account
                                  any shares of Common Stock issuable upon
                                  conversion, exchange or exercise of any
                                  securities or other instruments which are
                                  convertible into or exercisable or
                                  exchangeable for Common Stock

                                     - 5 -
<PAGE>

                                  ("Convertible Securities") or options,
                                  warrants or other rights to purchase or
                                  subscribe for Common Stock or Convertible
                                  Securities ("Purchase Rights");

                           N1 =   the number of shares of Common Stock
                                  which the aggregate consideration, if any,
                                  received or receivable by the Company for the
                                  total number of such additional shares of
                                  Common Stock so issued, sold or deemed issued
                                  or sold in such Dilutive Issuance (which, in
                                  the case of a deemed issuance or sale, shall
                                  be calculated in accordance with subparagraph
                                  (ii) below) would purchase at the Exercise
                                  Price in effect immediately prior to such
                                  Dilutive Issuance; and

                           N2 =   the number of such additional shares of
                                  Common Stock so issued, sold or deemed issued
                                  or sold in such Dilutive Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the date of the
      issuance or sale of such Purchase Rights, be deemed to have been issued
      and sold by the Company for such price per share. For purposes of the
      preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells

                                     - 6 -
<PAGE>

      any Convertible Securities, whether or not immediately convertible,
      exercisable or exchangeable, and the price per share for which Common
      Stock is issuable upon such conversion, exercise or exchange is less than
      the Exercise Price in effect on the date of issuance or sale of such
      Convertible Securities, then the maximum total number of shares of Common
      Stock issuable upon the conversion, exercise or exchange of all such
      Convertible Securities shall, as of the date of the issuance or sale of
      such Convertible Securities, be deemed to have been issued and sold by the
      Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still
      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the

                                     - 7 -
<PAGE>

      surviving corporation, the amount of consideration therefor will be deemed
      to be the fair market value of such portion of the net assets and business
      of the non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the Investors named therein, each as amended,
      modified and supplemented; (7) 361,800 shares (200,000 shares to James C.
      Eckert and 161,800 shares to G. Darcy Klug) and 100,000 options (40,000
      options to James C. Eckert and 60,000 options to G. Darcy Klug); and (8)
      2,924,424 shares issuable upon exercise of currently outstanding warrants
      and "investor options" listed on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination,

                                     - 8 -
<PAGE>

tender offer, exchange of shares, recapitalization, reorganization, redemption
or other similar event, as a result of which shares of Common Stock of the
Company shall be changed into the same or a different number of shares of the
same or another class or classes of stock or securities or other assets of the
Company or another entity or the Company shall sell all or substantially all of
its assets (each of the foregoing being a "Major Transaction"), the Company will
give the Holder at least twenty (20) days written notice prior to the closing of
such Major Transaction in a manner that does not constitute disclosure of
material non-public information (unless otherwise previously consented to in
writing by the Holder), and: (i) the Holder shall be permitted to exercise this
Warrant in whole or in part at any time prior to the record date for the receipt
of such consideration and shall be entitled to receive, for each share of Common
Stock issuable to Holder for such exercise, the same per share consideration
payable to the other holders of Common Stock in connection with such Major
Transaction, and (ii) if and to the extent that the Holder retains any portion
of this Warrant following such record date, the Company will cause the surviving
or, in the event of a sale of assets, purchasing entity, as a condition
precedent to such Major Transaction, to assume the obligations of the Company
under this Warrant, with such adjustments to the Exercise Price and the
securities covered hereby as may be necessary in order to preserve the economic
benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5. Fractional Interests.

      No fractional shares or scrip representing fractional shares shall be
issuable upon the exercise of this Warrant, but on exercise of this Warrant, the
Holder hereof may purchase only a whole number of shares of Common Stock. If, on
exercise of this Warrant, the Holder hereof would be entitled to a fractional
share of Common Stock or a right to acquire a fractional share of Common Stock,
the Company shall, in lieu of issuing any such fractional share, pay to the
Holder an amount in cash equal to the product resulting from multiplying such
fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person.

                                     - 9 -
<PAGE>

Within three (3) business days of receiving a Transfer Notice and the original
of this Warrant, the Company shall deliver to the each transferee designated by
the Holder a Warrant or Warrants of like tenor and terms for the appropriate
number of Warrant Shares and, if less than all this Warrant is transferred,
shall deliver to the Holder a Warrant for the remaining number of Warrant
Shares.

      7.    Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8.    Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9.    Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                  If to the Company:

                  OMNI Energy Services Corp.
                  4500 NE Evangeline Thruway
                  Carencro, LA 70520
                  Attn: James C. Eckert
                  Tel: (337) 896-6664
                  Fax: (337) 896-6655

                  with a copy (not constituting notice) to:

                  Locke Liddell & Sapp LLP
                  600 Travis, Suite 3200
                  Houston, TX 77002
                  Attention: David F. Taylor, Esq.
                  Tel:  (713) 226-1496
                  Fax: (713) 223-3717

                                     - 10 -
<PAGE>

                  If to Holder:

                  At the address set forth below Holder's signature on the
                  Securities Purchase Agreement.

                  with a copy (not constituting notice) to:

                  Solomon Ward Seidenwurm & Smith, LLP
                  401 B Street, Suite 1200
                  San Diego, CA 92101
                  Attn:  Harry J. Proctor, Esq.
                  Tel:  (619) 231-0303
                  Fax:  (619) 231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11.   Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed in accordance with the laws of the State of Delaware applicable
to contracts made and to be performed entirely within the State of Delaware.

      12.   Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13.   Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

                                     - 11 -
<PAGE>

      14.   Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                     - 12 -
<PAGE>

         IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                                 OMNI ENERGY SERVICES CORP.

                                                 By: /s/ James C. Eckert
                                                     -------------------
                                                     James C. Eckert
                                                     President<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date: May 17, 2005                                         Warrant No. B-1

      THIS CERTIFIES that THE DENNIS R. SCIOTTO FAMILY TRUST DATED DECEMBER 19,
1994, or any subsequent holder hereof (the "Holder"), has the right to purchase
from OMNI ENERGY SERVICES CORP., a Louisiana corporation (the "Company"), up to
665,000 fully paid and nonassessable shares of the Company's common stock, par
value $0.01 per share (the "Common Stock"), subject to adjustment as provided
herein, at a price per share equal to the Exercise Price (as defined below), at
any time beginning on the date hereof (the "the "Issue Date") and ending at 6:00
p.m., eastern time, on the date that is the fifth (5th) anniversary of the Issue
Date (the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $2.50, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the

<PAGE>

holders of Series C Convertible Preferred Stock ("Shareholder Approval"), in no
event shall the Exercise Price be less than $1.95, other than as a result of
adjustments for the events specified in Section 4(a) below. Payment of the
Exercise Price may be made solely in cash or by certified or official bank check
payable to the order of the Company equal to the applicable aggregate Exercise
Price.

      (c) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price. The Exercise Notice shall also state the name or names (with address) in
which the shares of Common Stock that are issuable on such exercise shall be
issued. In the case of a dispute as to the calculation of the Exercise Price or
the number of Warrant Shares issuable hereunder (including, without limitation,
the calculation of any adjustment pursuant to Section 4 below), the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed and shall submit the disputed calculations to a certified public
accounting firm of national recognition (other than the Company's independent
accountants), reasonably acceptable to Holder, within two (2) business days
following the date on which the Exercise Notice is delivered to the Company. The
Company shall cause such accountant to calculate the Exercise Price and/or the
number of Warrant Shares issuable hereunder and to notify the Company and the
Holder of the results in writing no later than three (3) business days following
the day on which such accountant received the disputed calculations (the
"Dispute Procedure"). Such accountant's calculation shall be deemed conclusive
absent manifest error. The fees of any such accountant shall be borne by the
party whose calculations were most at variance with those of such accountant.

      (d) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (e) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (f) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be

                                       -2-
<PAGE>

entitled to exercise all or any portion of such new warrant at any time
following the time at which this Warrant is exercised, regardless of whether the
Company has actually issued such new warrant or delivered to the Holder a
certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including,

                                       -3-
<PAGE>

without limitation, damages relating to any purchase of Common Stock by the
Holder to make delivery on a sale effected in anticipation of receiving Warrant
Shares upon exercise, such damages to be in an amount equal to (A) the aggregate
amount paid by the Holder for the Common Stock so purchased minus (B) the
aggregate amount of net proceeds, if any, received by the Holder from the sale
of the Warrant Shares issued by the Company pursuant to such exercise), and the
Holder shall have the right to pursue all remedies available to it at law or in
equity (including, without limitation, a decree of specific performance and/or
injunctive relief); provided, however, that, in the event, following an Exercise
Default, the Company delivers to the Holder the Warrant Shares that are required
to be issued by the Company pursuant to such exercise, the Holder shall use
commercially reasonable efforts to sell such shares promptly following such
delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after the date of record for
effecting such subdivision, the Exercise Price in effect immediately prior to
such subdivision will be proportionately reduced. Any adjustment made pursuant
to the foregoing sentence that results in a decrease in the Exercise Price shall
also effect a proportional increase in the number of Warrant Shares into which
this Warrant is exercisable. If the Company, at any time after the initial
issuance of this Warrant, combines (by reverse stock split, recapitalization,
reorganization, reclassification or otherwise) its shares of Common Stock into a
smaller number of shares, then, after the date of record for effecting such
combination, the Exercise Price in effect immediately prior to such combination
will be proportionally increased. Any adjustment made pursuant to the foregoing
sentence that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

                                       -4-
<PAGE>

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                N0 + N1
                -------
                N0 + N2

      where:

                N0 = the number of shares of Common Stock outstanding
                     immediately prior to the issuance, sale or deemed issuance
                     or sale of such additional shares of Common Stock in such
                     Dilutive Issuance without taking into account any shares of
                     Common Stock issuable upon conversion, exchange or exercise
                     of any securities or other instruments which are
                     convertible into or exercisable or exchangeable for Common
                     Stock ("Convertible Securities") or options, warrants or
                     other rights to purchase or subscribe for Common Stock or
                     Convertible Securities ("Purchase Rights");

                N1 = the number of shares of Common Stock which the aggregate
                     consideration, if any, received or receivable by the
                     Company for the total number of such additional shares of
                     Common Stock so issued, sold or deemed issued or sold in
                     such Dilutive Issuance (which, in the case of a deemed
                     issuance or sale, shall be calculated in accordance with
                     subparagraph (ii) below) would purchase at the Exercise
                     Price in effect immediately prior to such Dilutive
                     Issuance; and

                N2 = the number of such additional shares of Common Stock so
                     issued, sold or deemed issued or sold in such Dilutive
                     Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming

                                       -5-
<PAGE>

      full conversion, exercise or exchange of Convertible Securities, if
      applicable) shall, as of the date of the issuance or sale of such Purchase
      Rights, be deemed to have been issued and sold by the Company for such
      price per share. For purposes of the preceding sentence, the "price per
      share for which Common Stock is issuable upon the exercise of such
      Purchase Rights" shall be determined by dividing (x) the total amount, if
      any, received or receivable by the Company as consideration for the
      issuance or sale of all such Purchase Rights, plus the minimum aggregate
      amount of additional consideration, if any, payable to the Company upon
      the exercise of all such Purchase Rights, plus, in the case of Convertible
      Securities issuable upon the exercise of such Purchase Rights, the minimum
      aggregate amount of additional consideration payable upon the conversion,
      exercise or exchange of all such Convertible Securities (determined in
      accordance with the calculation method set forth in subparagraph (ii)(D)
      below), by (y) the maximum total number of shares of Common Stock issuable
      upon the exercise of all such Purchase Rights (assuming full conversion,
      exercise or exchange of Convertible Securities, if applicable). Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon the exercise of such Purchase Rights or upon the conversion, exercise
      or exchange of Convertible Securities issuable upon exercise of such
      Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have

                                       -6-
<PAGE>

      been in effect at such time had such Purchase Rights or Convertible
      Securities still outstanding provided for such changed purchase price,
      additional consideration or changed conversion, exercise or exchange rate,
      as the case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the surviving
      corporation, the amount of consideration therefor will be deemed to be the
      fair market value of such portion of the net assets and business of the
      non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the

                                       -7-
<PAGE>

      Securities Purchase Agreement, dated as of April 15, 2004, between the
      Company and the Investors named therein, each as amended, modified and
      supplemented; (7) 361,800 shares (200,000 shares to James C. Eckert and
      161,800 shares to G. Darcy Klug) and 100,000 options (40,000 options to
      James C. Eckert and 60,000 options to G. Darcy Klug); and (8) 2,924,424
      shares issuable upon exercise of currently outstanding warrants and
      "investor options" listed on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5. Fractional Interests.

                                       -8-
<PAGE>

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person. Within three
(3) business days of receiving a Transfer Notice and the original of this
Warrant, the Company shall deliver to the each transferee designated by the
Holder a Warrant or Warrants of like tenor and terms for the appropriate number
of Warrant Shares and, if less than all this Warrant is transferred, shall
deliver to the Holder a Warrant for the remaining number of Warrant Shares.

      7. Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8. Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9. Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                                       -9-
<PAGE>

            If to the Company:

            OMNI Energy Services Corp.
            4500 NE Evangeline Thruway
            Carencro, LA 70520
            Attn: James C. Eckert
            Tel: (337)896-6664
            Fax: (337)896-6655

            with a copy (not constituting notice) to:

            Locke Liddell & Sapp LLP
            600 Travis, Suite 3200
            Houston, TX 77002
            Attention: David F. Taylor, Esq.
            Tel: (713)226-1496
            Fax: (713)223-3717

            If to Holder:

            At the address set forth below Holder's signature on the Securities
            Purchase Agreement.

            with a copy (not constituting notice) to:

            Solomon Ward Seidenwurm & Smith, LLP
            401 B Street, Suite 1200
            San Diego, CA 92101
            Attn:  Harry J. Proctor, Esq.
            Tel: (619)231-0303
            Fax: (619)231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11. Applicable Law.

                                      -10-
<PAGE>

            This Warrant is issued under and shall for all purposes be governed
by and construed in accordance with the laws of the State of Delaware applicable
to contracts made and to be performed entirely within the State of Delaware.

      12. Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13. Entire Agreement.

            This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

      14. Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                      -11-
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                          OMNI ENERGY SERVICES CORP.

                                          By: /s/ G. Darcy Klug
                                              ------------------------------
                                              G. Darcy Klug
                                              Executive Vice President
<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date: May 17, 2005                                         Warrant No. B-2

      THIS CERTIFIES that Edward E. Colson, III Trust Dated january 2, 1995, or
any subsequent holder hereof (the "Holder"), has the right to purchase from OMNI
ENERGY SERVICES CORP., a Louisiana corporation (the "Company"), up to 70,000
fully paid and nonassessable shares of the Company's common stock, par value
$0.01 per share (the "Common Stock"), subject to adjustment as provided herein,
at a price per share equal to the Exercise Price (as defined below), at any time
beginning on the date hereof (the "the "Issue Date") and ending at 6:00 p.m.,
eastern time, on the date that is the fifth (5th) anniversary of the Issue Date
(the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $2.50, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made solely in cash or by certified or official bank check payable to the order
of the Company equal to the applicable aggregate Exercise Price.

      (c) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price. The Exercise Notice shall also state the name or names (with address) in
which the shares of Common Stock that are issuable on such exercise shall be
issued. In the case of a dispute as to the calculation of the Exercise Price or
the number of Warrant Shares issuable hereunder (including, without limitation,
the calculation of any adjustment pursuant to Section 4 below), the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed and shall submit the disputed calculations to a certified public
accounting firm of national recognition (other than the Company's independent
accountants), reasonably acceptable to Holder, within two (2) business days
following the date on which the Exercise Notice is delivered to the Company. The
Company shall cause such accountant to calculate the Exercise Price and/or the
number of Warrant Shares issuable hereunder and to notify the Company and the
Holder of the results in writing no later than three (3) business days following
the day on which such accountant received the disputed calculations (the
"Dispute Procedure"). Such accountant's calculation shall be deemed conclusive
absent manifest error. The fees of any such accountant shall be borne by the
party whose calculations were most at variance with those of such accountant.

      (d) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (e) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (f) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which

                                       -2-
<PAGE>

this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make

                                       -3-
<PAGE>

delivery on a sale effected in anticipation of receiving Warrant Shares upon
exercise, such damages to be in an amount equal to (A) the aggregate amount paid
by the Holder for the Common Stock so purchased minus (B) the aggregate amount
of net proceeds, if any, received by the Holder from the sale of the Warrant
Shares issued by the Company pursuant to such exercise), and the Holder shall
have the right to pursue all remedies available to it at law or in equity
(including, without limitation, a decree of specific performance and/or
injunctive relief); provided, however, that, in the event, following an Exercise
Default, the Company delivers to the Holder the Warrant Shares that are required
to be issued by the Company pursuant to such exercise, the Holder shall use
commercially reasonable efforts to sell such shares promptly following such
delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after the date of record for
effecting such subdivision, the Exercise Price in effect immediately prior to
such subdivision will be proportionately reduced. Any adjustment made pursuant
to the foregoing sentence that results in a decrease in the Exercise Price shall
also effect a proportional increase in the number of Warrant Shares into which
this Warrant is exercisable. If the Company, at any time after the initial
issuance of this Warrant, combines (by reverse stock split, recapitalization,
reorganization, reclassification or otherwise) its shares of Common Stock into a
smaller number of shares, then, after the date of record for effecting such
combination, the Exercise Price in effect immediately prior to such combination
will be proportionally increased. Any adjustment made pursuant to the foregoing
sentence that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

                                       -4-
<PAGE>

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                  N0 + N1
                  -------
                  N0 + N2

      where:

                  N0 = the number of shares of Common Stock outstanding
                       immediately prior to the issuance, sale or deemed
                       issuance or sale of such additional shares of Common
                       Stock in such Dilutive Issuance without taking into
                       account any shares of Common Stock issuable upon
                       conversion, exchange or exercise of any securities or
                       other instruments which are convertible into or
                       exercisable or exchangeable for Common Stock
                       ("Convertible Securities") or options, warrants or other
                       rights to purchase or subscribe for Common Stock or
                       Convertible Securities ("Purchase Rights");

                  N1 = the number of shares of Common Stock which the aggregate
                       consideration, if any, received or receivable by the
                       Company for the total number of such additional shares of
                       Common Stock so issued, sold or deemed issued or sold in
                       such Dilutive Issuance (which, in the case of a deemed
                       issuance or sale, shall be calculated in accordance with
                       subparagraph (ii) below) would purchase at the Exercise
                       Price in effect immediately prior to such Dilutive
                       Issuance; and

                  N2 = the number of such additional shares of Common Stock so
                       issued, sold or deemed issued or sold in such Dilutive
                       Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the

                                       -5-
<PAGE>

      date of the issuance or sale of such Purchase Rights, be deemed to have
      been issued and sold by the Company for such price per share. For purposes
      of the preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still

                                       -6-
<PAGE>

      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the surviving
      corporation, the amount of consideration therefor will be deemed to be the
      fair market value of such portion of the net assets and business of the
      non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the

                                       -7-
<PAGE>

      Investors named therein, each as amended, modified and supplemented; (7)
      361,800 shares (200,000 shares to James C. Eckert and 161,800 shares to G.
      Darcy Klug) and 100,000 options (40,000 options to James C. Eckert and
      60,000 options to G. Darcy Klug); and (8) 2,924,424 shares issuable upon
      exercise of currently outstanding warrants and "investor options" listed
      on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5. Fractional Interests.

                                       -8-
<PAGE>

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person. Within three
(3) business days of receiving a Transfer Notice and the original of this
Warrant, the Company shall deliver to the each transferee designated by the
Holder a Warrant or Warrants of like tenor and terms for the appropriate number
of Warrant Shares and, if less than all this Warrant is transferred, shall
deliver to the Holder a Warrant for the remaining number of Warrant Shares.

      7. Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8. Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9. Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                                       -9-
<PAGE>

            If to the Company:

            OMNI Energy Services Corp.
            4500 NE Evangeline Thruway
            Carencro, LA 70520
            Attn: James C. Eckert
            Tel: (337)896-6664
            Fax: (337)896-6655

            with a copy (not constituting notice) to:

            Locke Liddell & Sapp LLP
            600 Travis, Suite 3200
            Houston, TX 77002
            Attention: David F. Taylor, Esq.
            Tel: (713)226-1496
            Fax: (713)223-3717

            If to Holder:

            At the address set forth below Holder's signature on the Securities
            Purchase Agreement.

            with a copy (not constituting notice) to:

            Solomon Ward Seidenwurm & Smith, LLP
            401 B Street, Suite 1200
            San Diego, CA 92101
            Attn: Harry J. Proctor, Esq.
            Tel: (619)231-0303
            Fax: (619)231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11. Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed

                                      -10-
<PAGE>

in accordance with the laws of the State of Delaware applicable to contracts
made and to be performed entirely within the State of Delaware.

      12. Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13. Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

      14. Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                      -11-
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                        OMNI ENERGY SERVICES CORP.

                                        By: /s/ G. Darcy Klug
                                            --------------------------------
                                            G. Darcy Klug
                                            Executive Vice President
<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date: May 17, 2005                                         Warrant No. B-3

      THIS CERTIFIES that JIMIT MEHTA, or any subsequent holder hereof (the
"Holder"), has the right to purchase from OMNI ENERGY SERVICES CORP., a
Louisiana corporation (the "Company"), up to 52,500 fully paid and nonassessable
shares of the Company's common stock, par value $0.01 per share (the "Common
Stock"), subject to adjustment as provided herein, at a price per share equal to
the Exercise Price (as defined below), at any time beginning on the date hereof
(the "the "Issue Date") and ending at 6:00 p.m., eastern time, on the date that
is the fifth (5th) anniversary of the Issue Date (the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $2.50, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made solely in cash or by certified or official bank check payable to the order
of the Company equal to the applicable aggregate Exercise Price.

      (c) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price. The Exercise Notice shall also state the name or names (with address) in
which the shares of Common Stock that are issuable on such exercise shall be
issued. In the case of a dispute as to the calculation of the Exercise Price or
the number of Warrant Shares issuable hereunder (including, without limitation,
the calculation of any adjustment pursuant to Section 4 below), the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed and shall submit the disputed calculations to a certified public
accounting firm of national recognition (other than the Company's independent
accountants), reasonably acceptable to Holder, within two (2) business days
following the date on which the Exercise Notice is delivered to the Company. The
Company shall cause such accountant to calculate the Exercise Price and/or the
number of Warrant Shares issuable hereunder and to notify the Company and the
Holder of the results in writing no later than three (3) business days following
the day on which such accountant received the disputed calculations (the
"Dispute Procedure"). Such accountant's calculation shall be deemed conclusive
absent manifest error. The fees of any such accountant shall be borne by the
party whose calculations were most at variance with those of such accountant.

      (d) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (e) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (f) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which

                                       -2-
<PAGE>

this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make

                                       -3-
<PAGE>

delivery on a sale effected in anticipation of receiving Warrant Shares upon
exercise, such damages to be in an amount equal to (A) the aggregate amount paid
by the Holder for the Common Stock so purchased minus (B) the aggregate amount
of net proceeds, if any, received by the Holder from the sale of the Warrant
Shares issued by the Company pursuant to such exercise), and the Holder shall
have the right to pursue all remedies available to it at law or in equity
(including, without limitation, a decree of specific performance and/or
injunctive relief); provided, however, that, in the event, following an Exercise
Default, the Company delivers to the Holder the Warrant Shares that are required
to be issued by the Company pursuant to such exercise, the Holder shall use
commercially reasonable efforts to sell such shares promptly following such
delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after the date of record for
effecting such subdivision, the Exercise Price in effect immediately prior to
such subdivision will be proportionately reduced. Any adjustment made pursuant
to the foregoing sentence that results in a decrease in the Exercise Price shall
also effect a proportional increase in the number of Warrant Shares into which
this Warrant is exercisable. If the Company, at any time after the initial
issuance of this Warrant, combines (by reverse stock split, recapitalization,
reorganization, reclassification or otherwise) its shares of Common Stock into a
smaller number of shares, then, after the date of record for effecting such
combination, the Exercise Price in effect immediately prior to such combination
will be proportionally increased. Any adjustment made pursuant to the foregoing
sentence that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

                                       -4-
<PAGE>

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                  N0 + N1
                  -------
                  N0 + N2

      where:

                  N0 = the number of shares of Common Stock outstanding
                       immediately prior to the issuance, sale or deemed
                       issuance or sale of such additional shares of Common
                       Stock in such Dilutive Issuance without taking into
                       account any shares of Common Stock issuable upon
                       conversion, exchange or exercise of any securities or
                       other instruments which are convertible into or
                       exercisable or exchangeable for Common Stock
                       ("Convertible Securities") or options, warrants or other
                       rights to purchase or subscribe for Common Stock or
                       Convertible Securities ("Purchase Rights");

                  N1 = the number of shares of Common Stock which the aggregate
                       consideration, if any, received or receivable by the
                       Company for the total number of such additional shares of
                       Common Stock so issued, sold or deemed issued or sold in
                       such Dilutive Issuance (which, in the case of a deemed
                       issuance or sale, shall be calculated in accordance with
                       subparagraph (ii) below) would purchase at the Exercise
                       Price in effect immediately prior to such Dilutive
                       Issuance; and

                  N2 = the number of such additional shares of Common Stock so
                       issued, sold or deemed issued or sold in such Dilutive
                       Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the

                                       -5-
<PAGE>

      date of the issuance or sale of such Purchase Rights, be deemed to have
      been issued and sold by the Company for such price per share. For purposes
      of the preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still

                                       -6-
<PAGE>

      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the surviving
      corporation, the amount of consideration therefor will be deemed to be the
      fair market value of such portion of the net assets and business of the
      non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the

                                       -7-
<PAGE>

      Investors named therein, each as amended, modified and supplemented; (7)
      361,800 shares (200,000 shares to James C. Eckert and 161,800 shares to G.
      Darcy Klug) and 100,000 options (40,000 options to James C. Eckert and
      60,000 options to G. Darcy Klug); and (8) 2,924,424 shares issuable upon
      exercise of currently outstanding warrants and "investor options" listed
      on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5. Fractional Interests.

                                       -8-
<PAGE>

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person. Within three
(3) business days of receiving a Transfer Notice and the original of this
Warrant, the Company shall deliver to the each transferee designated by the
Holder a Warrant or Warrants of like tenor and terms for the appropriate number
of Warrant Shares and, if less than all this Warrant is transferred, shall
deliver to the Holder a Warrant for the remaining number of Warrant Shares.

      7. Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8. Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9. Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                                       -9-
<PAGE>

            If to the Company:

            OMNI Energy Services Corp.
            4500 NE Evangeline Thruway
            Carencro, LA 70520
            Attn: James C. Eckert
            Tel: (337)896-6664
            Fax: (337)896-6655

            with a copy (not constituting notice) to:

            Locke Liddell & Sapp LLP
            600 Travis, Suite 3200
            Houston, TX 77002
            Attention: David F. Taylor, Esq.
            Tel: (713)226-1496
            Fax: (713)223-3717

            If to Holder:

            At the address set forth below Holder's signature on the Securities
            Purchase Agreement.

            with a copy (not constituting notice) to:

            Solomon Ward Seidenwurm & Smith, LLP
            401 B Street, Suite 1200
            San Diego, CA 92101
            Attn: Harry J. Proctor, Esq.
            Tel: (619)231-0303
            Fax: (619)231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11. Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed

                                      -10-
<PAGE>

in accordance with the laws of the State of Delaware applicable to contracts
made and to be performed entirely within the State of Delaware.

      12. Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13. Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

      14. Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                      -11-
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                          OMNI ENERGY SERVICES CORP.

                                          By: /s/ G. Darcy Klug
                                              -------------------------------
                                              G. Darcy Klug
                                              Executive Vice President
<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date: May 17, 2005                                         Warrant No. B-4

      THIS CERTIFIES that JAMES C. ECKERT, or any subsequent holder hereof (the
"Holder"), has the right to purchase from OMNI ENERGY SERVICES CORP., a
Louisiana corporation (the "Company"), up to 43,750 fully paid and nonassessable
shares of the Company's common stock, par value $0.01 per share (the "Common
Stock"), subject to adjustment as provided herein, at a price per share equal to
the Exercise Price (as defined below), at any time beginning on the date hereof
(the "the "Issue Date") and ending at 6:00 p.m., eastern time, on the date that
is the fifth (5th) anniversary of the Issue Date (the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $2.50, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made solely in cash or by certified or official bank check payable to the order
of the Company equal to the applicable aggregate Exercise Price.

      (c) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price. The Exercise Notice shall also state the name or names (with address) in
which the shares of Common Stock that are issuable on such exercise shall be
issued. In the case of a dispute as to the calculation of the Exercise Price or
the number of Warrant Shares issuable hereunder (including, without limitation,
the calculation of any adjustment pursuant to Section 4 below), the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed and shall submit the disputed calculations to a certified public
accounting firm of national recognition (other than the Company's independent
accountants), reasonably acceptable to Holder, within two (2) business days
following the date on which the Exercise Notice is delivered to the Company. The
Company shall cause such accountant to calculate the Exercise Price and/or the
number of Warrant Shares issuable hereunder and to notify the Company and the
Holder of the results in writing no later than three (3) business days following
the day on which such accountant received the disputed calculations (the
"Dispute Procedure"). Such accountant's calculation shall be deemed conclusive
absent manifest error. The fees of any such accountant shall be borne by the
party whose calculations were most at variance with those of such accountant.

      (d) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (e) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (f) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which

                                       -2-
<PAGE>

this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make

                                       -3-
<PAGE>

delivery on a sale effected in anticipation of receiving Warrant Shares upon
exercise, such damages to be in an amount equal to (A) the aggregate amount paid
by the Holder for the Common Stock so purchased minus (B) the aggregate amount
of net proceeds, if any, received by the Holder from the sale of the Warrant
Shares issued by the Company pursuant to such exercise), and the Holder shall
have the right to pursue all remedies available to it at law or in equity
(including, without limitation, a decree of specific performance and/or
injunctive relief); provided, however, that, in the event, following an Exercise
Default, the Company delivers to the Holder the Warrant Shares that are required
to be issued by the Company pursuant to such exercise, the Holder shall use
commercially reasonable efforts to sell such shares promptly following such
delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after the date of record for
effecting such subdivision, the Exercise Price in effect immediately prior to
such subdivision will be proportionately reduced. Any adjustment made pursuant
to the foregoing sentence that results in a decrease in the Exercise Price shall
also effect a proportional increase in the number of Warrant Shares into which
this Warrant is exercisable. If the Company, at any time after the initial
issuance of this Warrant, combines (by reverse stock split, recapitalization,
reorganization, reclassification or otherwise) its shares of Common Stock into a
smaller number of shares, then, after the date of record for effecting such
combination, the Exercise Price in effect immediately prior to such combination
will be proportionally increased. Any adjustment made pursuant to the foregoing
sentence that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

                                       -4-
<PAGE>

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                  N0 + N1
                  -------
                  N0 + N2

      where:

                  N0 = the number of shares of Common Stock outstanding
                       immediately prior to the issuance, sale or deemed
                       issuance or sale of such additional shares of Common
                       Stock in such Dilutive Issuance without taking into
                       account any shares of Common Stock issuable upon
                       conversion, exchange or exercise of any securities or
                       other instruments which are convertible into or
                       exercisable or exchangeable for Common Stock
                       ("Convertible Securities") or options, warrants or other
                       rights to purchase or subscribe for Common Stock or
                       Convertible Securities ("Purchase Rights");

                  N1 = the number of shares of Common Stock which the aggregate
                       consideration, if any, received or receivable by the
                       Company for the total number of such additional shares of
                       Common Stock so issued, sold or deemed issued or sold in
                       such Dilutive Issuance (which, in the case of a deemed
                       issuance or sale, shall be calculated in accordance with
                       subparagraph (ii) below) would purchase at the Exercise
                       Price in effect immediately prior to such Dilutive
                       Issuance; and

                  N2 = the number of such additional shares of Common Stock so
                       issued, sold or deemed issued or sold in such Dilutive
                       Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the

                                       -5-
<PAGE>

      date of the issuance or sale of such Purchase Rights, be deemed to have
      been issued and sold by the Company for such price per share. For purposes
      of the preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still

                                       -6-
<PAGE>

      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the surviving
      corporation, the amount of consideration therefor will be deemed to be the
      fair market value of such portion of the net assets and business of the
      non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the

                                       -7-
<PAGE>

      Investors named therein, each as amended, modified and supplemented; (7)
      361,800 shares (200,000 shares to James C. Eckert and 161,800 shares to G.
      Darcy Klug) and 100,000 options (40,000 options to James C. Eckert and
      60,000 options to G. Darcy Klug); and (8) 2,924,424 shares issuable upon
      exercise of currently outstanding warrants and "investor options" listed
      on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5. Fractional Interests.

                                       -8-
<PAGE>

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person. Within three
(3) business days of receiving a Transfer Notice and the original of this
Warrant, the Company shall deliver to the each transferee designated by the
Holder a Warrant or Warrants of like tenor and terms for the appropriate number
of Warrant Shares and, if less than all this Warrant is transferred, shall
deliver to the Holder a Warrant for the remaining number of Warrant Shares.

      7. Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8. Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9. Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                                       -9-
<PAGE>

            If to the Company:

            OMNI Energy Services Corp.
            4500 NE Evangeline Thruway
            Carencro, LA 70520
            Attn: James C. Eckert
            Tel: (337)896-6664
            Fax: (337)896-6655

            with a copy (not constituting notice) to:

            Locke Liddell & Sapp LLP
            600 Travis, Suite 3200
            Houston, TX 77002
            Attention: David F. Taylor, Esq.
            Tel: (713)226-1496
            Fax: (713)223-3717

            If to Holder:

            At the address set forth below Holder's signature on the Securities
            Purchase Agreement.

            with a copy (not constituting notice) to:

            Solomon Ward Seidenwurm & Smith, LLP
            401 B Street, Suite 1200
            San Diego, CA 92101
            Attn: Harry J. Proctor, Esq.
            Tel: (619)231-0303
            Fax: (619)231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11. Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed

                                      -10-
<PAGE>

in accordance with the laws of the State of Delaware applicable to contracts
made and to be performed entirely within the State of Delaware.

      12. Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13. Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

      14. Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                      -11-
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                          OMNI ENERGY SERVICES CORP.

                                          By: /s/ G. Darcy Klug
                                              -------------------------------
                                              G. Darcy Klug
                                              Executive Vice President
<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date: May 17, 2005                                         Warrant No. B-5

      THIS CERTIFIES that G. DARCY KLUG, or any subsequent holder hereof (the
"Holder"), has the right to purchase from OMNI ENERGY SERVICES CORP., a
Louisiana corporation (the "Company"), up to 43,750 fully paid and nonassessable
shares of the Company's common stock, par value $0.01 per share (the "Common
Stock"), subject to adjustment as provided herein, at a price per share equal to
the Exercise Price (as defined below), at any time beginning on the date hereof
(the "the "Issue Date") and ending at 6:00 p.m., eastern time, on the date that
is the fifth (5th) anniversary of the Issue Date (the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $2.50, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made solely in cash or by certified or official bank check payable to the order
of the Company equal to the applicable aggregate Exercise Price.

      (c) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price. The Exercise Notice shall also state the name or names (with address) in
which the shares of Common Stock that are issuable on such exercise shall be
issued. In the case of a dispute as to the calculation of the Exercise Price or
the number of Warrant Shares issuable hereunder (including, without limitation,
the calculation of any adjustment pursuant to Section 4 below), the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed and shall submit the disputed calculations to a certified public
accounting firm of national recognition (other than the Company's independent
accountants), reasonably acceptable to Holder, within two (2) business days
following the date on which the Exercise Notice is delivered to the Company. The
Company shall cause such accountant to calculate the Exercise Price and/or the
number of Warrant Shares issuable hereunder and to notify the Company and the
Holder of the results in writing no later than three (3) business days following
the day on which such accountant received the disputed calculations (the
"Dispute Procedure"). Such accountant's calculation shall be deemed conclusive
absent manifest error. The fees of any such accountant shall be borne by the
party whose calculations were most at variance with those of such accountant.

      (d) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (e) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (f) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which

                                       -2-
<PAGE>

this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make

                                       -3-
<PAGE>

delivery on a sale effected in anticipation of receiving Warrant Shares upon
exercise, such damages to be in an amount equal to (A) the aggregate amount paid
by the Holder for the Common Stock so purchased minus (B) the aggregate amount
of net proceeds, if any, received by the Holder from the sale of the Warrant
Shares issued by the Company pursuant to such exercise), and the Holder shall
have the right to pursue all remedies available to it at law or in equity
(including, without limitation, a decree of specific performance and/or
injunctive relief); provided, however, that, in the event, following an Exercise
Default, the Company delivers to the Holder the Warrant Shares that are required
to be issued by the Company pursuant to such exercise, the Holder shall use
commercially reasonable efforts to sell such shares promptly following such
delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after the date of record for
effecting such subdivision, the Exercise Price in effect immediately prior to
such subdivision will be proportionately reduced. Any adjustment made pursuant
to the foregoing sentence that results in a decrease in the Exercise Price shall
also effect a proportional increase in the number of Warrant Shares into which
this Warrant is exercisable. If the Company, at any time after the initial
issuance of this Warrant, combines (by reverse stock split, recapitalization,
reorganization, reclassification or otherwise) its shares of Common Stock into a
smaller number of shares, then, after the date of record for effecting such
combination, the Exercise Price in effect immediately prior to such combination
will be proportionally increased. Any adjustment made pursuant to the foregoing
sentence that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

                                       -4-
<PAGE>

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                  N0 + N1
                  -------
                  N0 + N2

      where:

                  N0 = the number of shares of Common Stock outstanding
                       immediately prior to the issuance, sale or deemed
                       issuance or sale of such additional shares of Common
                       Stock in such Dilutive Issuance without taking into
                       account any shares of Common Stock issuable upon
                       conversion, exchange or exercise of any securities or
                       other instruments which are convertible into or
                       exercisable or exchangeable for Common Stock
                       ("Convertible Securities") or options, warrants or other
                       rights to purchase or subscribe for Common Stock or
                       Convertible Securities ("Purchase Rights");

                  N1 = the number of shares of Common Stock which the aggregate
                       consideration, if any, received or receivable by the
                       Company for the total number of such additional shares of
                       Common Stock so issued, sold or deemed issued or sold in
                       such Dilutive Issuance (which, in the case of a deemed
                       issuance or sale, shall be calculated in accordance with
                       subparagraph (ii) below) would purchase at the Exercise
                       Price in effect immediately prior to such Dilutive
                       Issuance; and

                  N2 = the number of such additional shares of Common Stock so
                       issued, sold or deemed issued or sold in such Dilutive
                       Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the

                                       -5-
<PAGE>

      date of the issuance or sale of such Purchase Rights, be deemed to have
      been issued and sold by the Company for such price per share. For purposes
      of the preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still

                                       -6-
<PAGE>

      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the surviving
      corporation, the amount of consideration therefor will be deemed to be the
      fair market value of such portion of the net assets and business of the
      non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the

                                       -7-
<PAGE>

      Investors named therein, each as amended, modified and supplemented; (7)
      361,800 shares (200,000 shares to James C. Eckert and 161,800 shares to G.
      Darcy Klug) and 100,000 options (40,000 options to James C. Eckert and
      60,000 options to G. Darcy Klug); and (8) 2,924,424 shares issuable upon
      exercise of currently outstanding warrants and "investor options" listed
      on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5. Fractional Interests.

                                       -8-
<PAGE>

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person. Within three
(3) business days of receiving a Transfer Notice and the original of this
Warrant, the Company shall deliver to the each transferee designated by the
Holder a Warrant or Warrants of like tenor and terms for the appropriate number
of Warrant Shares and, if less than all this Warrant is transferred, shall
deliver to the Holder a Warrant for the remaining number of Warrant Shares.

      7. Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8. Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9. Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                                       -9-
<PAGE>

            If to the Company:

            OMNI Energy Services Corp.
            4500 NE Evangeline Thruway
            Carencro, LA 70520
            Attn: James C. Eckert
            Tel: (337)896-6664
            Fax: (337)896-6655

            with a copy (not constituting notice) to:

            Locke Liddell & Sapp LLP
            600 Travis, Suite 3200
            Houston, TX 77002
            Attention: David F. Taylor, Esq.
            Tel: (713)226-1496
            Fax: (713)223-3717

            If to Holder:

            At the address set forth below Holder's signature on the Securities
            Purchase Agreement.

            with a copy (not constituting notice) to:

            Solomon Ward Seidenwurm & Smith, LLP
            401 B Street, Suite 1200
            San Diego, CA 92101
            Attn: Harry J. Proctor, Esq.
            Tel: (619)231-0303
            Fax: (619)231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11. Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed

                                      -10-
<PAGE>

in accordance with the laws of the State of Delaware applicable to contracts
made and to be performed entirely within the State of Delaware.

      12. Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13. Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

      14. Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                      -11-
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                          OMNI ENERGY SERVICES CORP.

                                          By: /s/ James C. Eckert
                                              ------------------------------
                                              James C. Eckert
                                              President
<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date: May 17, 2005                                         Warrant No. C-1

      THIS CERTIFIES that THE DENNIS R. SCIOTTO FAMILY TRUST DATED DECEMBER 19,
1994, or any subsequent holder hereof (the "Holder"), has the right to purchase
from OMNI ENERGY SERVICES CORP., a Louisiana corporation (the "Company"), up to
266,000 fully paid and nonassessable shares of the Company's common stock, par
value $0.01 per share (the "Common Stock"), subject to adjustment as provided
herein, at a price per share equal to the Exercise Price (as defined below), at
any time beginning on the date hereof (the "the "Issue Date") and ending at 6:00
p.m., eastern time, on the date that is the fifth (5th) anniversary of the Issue
Date (the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $3.50, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the

<PAGE>

holders of Series C Convertible Preferred Stock ("Shareholder Approval"), in no
event shall the Exercise Price be less than $1.95, other than as a result of
adjustments for the events specified in Section 4(a) below. Payment of the
Exercise Price may be made solely in cash or by certified or official bank check
payable to the order of the Company equal to the applicable aggregate Exercise
Price.

      (c) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price. The Exercise Notice shall also state the name or names (with address) in
which the shares of Common Stock that are issuable on such exercise shall be
issued. In the case of a dispute as to the calculation of the Exercise Price or
the number of Warrant Shares issuable hereunder (including, without limitation,
the calculation of any adjustment pursuant to Section 4 below), the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed and shall submit the disputed calculations to a certified public
accounting firm of national recognition (other than the Company's independent
accountants), reasonably acceptable to Holder, within two (2) business days
following the date on which the Exercise Notice is delivered to the Company. The
Company shall cause such accountant to calculate the Exercise Price and/or the
number of Warrant Shares issuable hereunder and to notify the Company and the
Holder of the results in writing no later than three (3) business days following
the day on which such accountant received the disputed calculations (the
"Dispute Procedure"). Such accountant's calculation shall be deemed conclusive
absent manifest error. The fees of any such accountant shall be borne by the
party whose calculations were most at variance with those of such accountant.

      (d) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (e) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (f) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be

                                      -2-
<PAGE>

entitled to exercise all or any portion of such new warrant at any time
following the time at which this Warrant is exercised, regardless of whether the
Company has actually issued such new warrant or delivered to the Holder a
certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including,

                                      -3-
<PAGE>

without limitation, damages relating to any purchase of Common Stock by the
Holder to make delivery on a sale effected in anticipation of receiving Warrant
Shares upon exercise, such damages to be in an amount equal to (A) the aggregate
amount paid by the Holder for the Common Stock so purchased minus (B) the
aggregate amount of net proceeds, if any, received by the Holder from the sale
of the Warrant Shares issued by the Company pursuant to such exercise), and the
Holder shall have the right to pursue all remedies available to it at law or in
equity (including, without limitation, a decree of specific performance and/or
injunctive relief); provided, however, that, in the event, following an Exercise
Default, the Company delivers to the Holder the Warrant Shares that are required
to be issued by the Company pursuant to such exercise, the Holder shall use
commercially reasonable efforts to sell such shares promptly following such
delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after the date of record for
effecting such subdivision, the Exercise Price in effect immediately prior to
such subdivision will be proportionately reduced. Any adjustment made pursuant
to the foregoing sentence that results in a decrease in the Exercise Price shall
also effect a proportional increase in the number of Warrant Shares into which
this Warrant is exercisable. If the Company, at any time after the initial
issuance of this Warrant, combines (by reverse stock split, recapitalization,
reorganization, reclassification or otherwise) its shares of Common Stock into a
smaller number of shares, then, after the date of record for effecting such
combination, the Exercise Price in effect immediately prior to such combination
will be proportionally increased. Any adjustment made pursuant to the foregoing
sentence that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

                                      -4-
<PAGE>

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                  N0 + N1
                  -------
                  N0 + N2

      where:

                  N0 = the number of shares of Common Stock outstanding
                       immediately prior to the issuance, sale or deemed
                       issuance or sale of such additional shares of Common
                       Stock in such Dilutive Issuance without taking into
                       account any shares of Common Stock issuable upon
                       conversion, exchange or exercise of any securities or
                       other instruments which are convertible into or
                       exercisable or exchangeable for Common Stock
                       ("Convertible Securities") or options, warrants or other
                       rights to purchase or subscribe for Common Stock or
                       Convertible Securities ("Purchase Rights");

                  N1 = the number of shares of Common Stock which the aggregate
                       consideration, if any, received or receivable by the
                       Company for the total number of such additional shares of
                       Common Stock so issued, sold or deemed issued or sold in
                       such Dilutive Issuance (which, in the case of a deemed
                       issuance or sale, shall be calculated in accordance with
                       subparagraph (ii) below) would purchase at the Exercise
                       Price in effect immediately prior to such Dilutive
                       Issuance; and

                  N2 = the number of such additional shares of Common Stock so
                       issued, sold or deemed issued or sold in such Dilutive
                       Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming

                                      -5-
<PAGE>

      full conversion, exercise or exchange of Convertible Securities, if
      applicable) shall, as of the date of the issuance or sale of such Purchase
      Rights, be deemed to have been issued and sold by the Company for such
      price per share. For purposes of the preceding sentence, the "price per
      share for which Common Stock is issuable upon the exercise of such
      Purchase Rights" shall be determined by dividing (x) the total amount, if
      any, received or receivable by the Company as consideration for the
      issuance or sale of all such Purchase Rights, plus the minimum aggregate
      amount of additional consideration, if any, payable to the Company upon
      the exercise of all such Purchase Rights, plus, in the case of Convertible
      Securities issuable upon the exercise of such Purchase Rights, the minimum
      aggregate amount of additional consideration payable upon the conversion,
      exercise or exchange of all such Convertible Securities (determined in
      accordance with the calculation method set forth in subparagraph (ii)(D)
      below), by (y) the maximum total number of shares of Common Stock issuable
      upon the exercise of all such Purchase Rights (assuming full conversion,
      exercise or exchange of Convertible Securities, if applicable). Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon the exercise of such Purchase Rights or upon the conversion, exercise
      or exchange of Convertible Securities issuable upon exercise of such
      Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have

                                      -6-
<PAGE>

      been in effect at such time had such Purchase Rights or Convertible
      Securities still outstanding provided for such changed purchase price,
      additional consideration or changed conversion, exercise or exchange rate,
      as the case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the surviving
      corporation, the amount of consideration therefor will be deemed to be the
      fair market value of such portion of the net assets and business of the
      non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the

                                      -7-
<PAGE>

      Securities Purchase Agreement, dated as of April 15, 2004, between the
      Company and the Investors named therein, each as amended, modified and
      supplemented; (7) 361,800 shares (200,000 shares to James C. Eckert and
      161,800 shares to G. Darcy Klug) and 100,000 options (40,000 options to
      James C. Eckert and 60,000 options to G. Darcy Klug); and (8) 2,924,424
      shares issuable upon exercise of currently outstanding warrants and
      "investor options" listed on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5. Fractional Interests.

                                      -8-
<PAGE>

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person. Within three
(3) business days of receiving a Transfer Notice and the original of this
Warrant, the Company shall deliver to the each transferee designated by the
Holder a Warrant or Warrants of like tenor and terms for the appropriate number
of Warrant Shares and, if less than all this Warrant is transferred, shall
deliver to the Holder a Warrant for the remaining number of Warrant Shares.

      7. Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8. Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9. Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                                      -9-
<PAGE>

            If to the Company:

            OMNI Energy Services Corp.
            4500 NE Evangeline Thruway
            Carencro, LA 70520
            Attn: James C. Eckert
            Tel: (337) 896-6664
            Fax: (337) 896-6655

            with a copy (not constituting notice) to:

            Locke Liddell & Sapp LLP
            600 Travis, Suite 3200
            Houston, TX 77002
            Attention: David F. Taylor, Esq.
            Tel: (713) 226-1496
            Fax: (713) 223-3717

            If to Holder:

            At the address set forth below Holder's signature on the Securities
            Purchase Agreement.

            with a copy (not constituting notice) to:

            Solomon Ward Seidenwurm & Smith, LLP
            401 B Street, Suite 1200
            San Diego, CA 92101
            Attn: Harry J. Proctor, Esq.
            Tel: (619) 231-0303
            Fax: (619) 231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11. Applicable Law.

                                      -10-
<PAGE>

            This Warrant is issued under and shall for all purposes be governed
by and construed in accordance with the laws of the State of Delaware applicable
to contracts made and to be performed entirely within the State of Delaware.

      12. Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13. Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

      14. Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                      -11-
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                       OMNI ENERGY SERVICES CORP.

                                       By: /s/ G. Darcy Klug
                                           ------------------------------
                                           G. Darcy Klug
                                           Executive Vice President
<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date:  May 17, 2005                                        Warrant No. C-2

      THIS CERTIFIES that Edward E. Colson, III Trust Dated january 2, 1995, or
any subsequent holder hereof (the "Holder"), has the right to purchase from OMNI
ENERGY SERVICES CORP., a Louisiana corporation (the "Company"), up to 28,000
fully paid and nonassessable shares of the Company's common stock, par value
$0.01 per share (the "Common Stock"), subject to adjustment as provided herein,
at a price per share equal to the Exercise Price (as defined below), at any time
beginning on the date hereof (the "the "Issue Date") and ending at 6:00 p.m.,
eastern time, on the date that is the fifth (5th) anniversary of the Issue Date
(the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $3.50, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made solely in cash or by certified or official bank check payable to the order
of the Company equal to the applicable aggregate Exercise Price.

      (c) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price. The Exercise Notice shall also state the name or names (with address) in
which the shares of Common Stock that are issuable on such exercise shall be
issued. In the case of a dispute as to the calculation of the Exercise Price or
the number of Warrant Shares issuable hereunder (including, without limitation,
the calculation of any adjustment pursuant to Section 4 below), the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed and shall submit the disputed calculations to a certified public
accounting firm of national recognition (other than the Company's independent
accountants), reasonably acceptable to Holder, within two (2) business days
following the date on which the Exercise Notice is delivered to the Company. The
Company shall cause such accountant to calculate the Exercise Price and/or the
number of Warrant Shares issuable hereunder and to notify the Company and the
Holder of the results in writing no later than three (3) business days following
the day on which such accountant received the disputed calculations (the
"Dispute Procedure"). Such accountant's calculation shall be deemed conclusive
absent manifest error. The fees of any such accountant shall be borne by the
party whose calculations were most at variance with those of such accountant.

      (d) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (e) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (f) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which

                                      -2-
<PAGE>

this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make

                                      -3-
<PAGE>

delivery on a sale effected in anticipation of receiving Warrant Shares upon
exercise, such damages to be in an amount equal to (A) the aggregate amount paid
by the Holder for the Common Stock so purchased minus (B) the aggregate amount
of net proceeds, if any, received by the Holder from the sale of the Warrant
Shares issued by the Company pursuant to such exercise), and the Holder shall
have the right to pursue all remedies available to it at law or in equity
(including, without limitation, a decree of specific performance and/or
injunctive relief); provided, however, that, in the event, following an Exercise
Default, the Company delivers to the Holder the Warrant Shares that are required
to be issued by the Company pursuant to such exercise, the Holder shall use
commercially reasonable efforts to sell such shares promptly following such
delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after the date of record for
effecting such subdivision, the Exercise Price in effect immediately prior to
such subdivision will be proportionately reduced. Any adjustment made pursuant
to the foregoing sentence that results in a decrease in the Exercise Price shall
also effect a proportional increase in the number of Warrant Shares into which
this Warrant is exercisable. If the Company, at any time after the initial
issuance of this Warrant, combines (by reverse stock split, recapitalization,
reorganization, reclassification or otherwise) its shares of Common Stock into a
smaller number of shares, then, after the date of record for effecting such
combination, the Exercise Price in effect immediately prior to such combination
will be proportionally increased. Any adjustment made pursuant to the foregoing
sentence that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

                                      -4-
<PAGE>

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                  N0 + N1
                  -------
                  N0 + N2

      where:

                  N0 = the number of shares of Common Stock outstanding
                       immediately prior to the issuance, sale or deemed
                       issuance or sale of such additional shares of Common
                       Stock in such Dilutive Issuance without taking into
                       account any shares of Common Stock issuable upon
                       conversion, exchange or exercise of any securities or
                       other instruments which are convertible into or
                       exercisable or exchangeable for Common Stock
                       ("Convertible Securities") or options, warrants or other
                       rights to purchase or subscribe for Common Stock or
                       Convertible Securities ("Purchase Rights");

                  N1 = the number of shares of Common Stock which the aggregate
                       consideration, if any, received or receivable by the
                       Company for the total number of such additional shares of
                       Common Stock so issued, sold or deemed issued or sold in
                       such Dilutive Issuance (which, in the case of a deemed
                       issuance or sale, shall be calculated in accordance with
                       subparagraph (ii) below) would purchase at the Exercise
                       Price in effect immediately prior to such Dilutive
                       Issuance; and

                  N2 = the number of such additional shares of Common Stock so
                       issued, sold or deemed issued or sold in such Dilutive
                       Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the

                                      -5-
<PAGE>

      date of the issuance or sale of such Purchase Rights, be deemed to have
      been issued and sold by the Company for such price per share. For purposes
      of the preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still

                                      -6-
<PAGE>

      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the surviving
      corporation, the amount of consideration therefor will be deemed to be the
      fair market value of such portion of the net assets and business of the
      non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the

                                      -7-
<PAGE>

      Investors named therein, each as amended, modified and supplemented; (7)
      361,800 shares (200,000 shares to James C. Eckert and 161,800 shares to G.
      Darcy Klug) and 100,000 options (40,000 options to James C. Eckert and
      60,000 options to G. Darcy Klug); and (8) 2,924,424 shares issuable upon
      exercise of currently outstanding warrants and "investor options" listed
      on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5. Fractional Interests.

                                      -8-
<PAGE>

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person. Within three
(3) business days of receiving a Transfer Notice and the original of this
Warrant, the Company shall deliver to the each transferee designated by the
Holder a Warrant or Warrants of like tenor and terms for the appropriate number
of Warrant Shares and, if less than all this Warrant is transferred, shall
deliver to the Holder a Warrant for the remaining number of Warrant Shares.

      7. Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8. Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9. Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                                      -9-
<PAGE>

            If to the Company:

            OMNI Energy Services Corp.
            4500 NE Evangeline Thruway
            Carencro, LA 70520
            Attn: James C. Eckert
            Tel: (337) 896-6664
            Fax: (337) 896-6655

            with a copy (not constituting notice) to:

            Locke Liddell & Sapp LLP
            600 Travis, Suite 3200
            Houston, TX 77002
            Attention: David F. Taylor, Esq.
            Tel: (713) 226-1496
            Fax: (713) 223-3717

            If to Holder:

            At the address set forth below Holder's signature on the Securities
            Purchase Agreement.

            with a copy (not constituting notice) to:

            Solomon Ward Seidenwurm & Smith, LLP
            401 B Street, Suite 1200
            San Diego, CA 92101
            Attn:  Harry J. Proctor, Esq.
            Tel: (619) 231-0303
            Fax: (619) 231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11. Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed

                                      -10-
<PAGE>

in accordance with the laws of the State of Delaware applicable to contracts
made and to be performed entirely within the State of Delaware.

      12. Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13. Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

      14. Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                      -11-
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                            OMNI ENERGY SERVICES CORP.

                                            By: /s/ G. Darcy Klug
                                                --------------------------------
                                                G. Darcy Klug
                                                Executive Vice President
<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date:  May 17, 2005                                        Warrant No. C-3

      THIS CERTIFIES that JIMIT MEHTA, or any subsequent holder hereof (the
"Holder"), has the right to purchase from OMNI ENERGY SERVICES CORP., a
Louisiana corporation (the "Company"), up to 21,000 fully paid and nonassessable
shares of the Company's common stock, par value $0.01 per share (the "Common
Stock"), subject to adjustment as provided herein, at a price per share equal to
the Exercise Price (as defined below), at any time beginning on the date hereof
(the "the "Issue Date") and ending at 6:00 p.m., eastern time, on the date that
is the fifth (5th) anniversary of the Issue Date (the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $3.50, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made solely in cash or by certified or official bank check payable to the order
of the Company equal to the applicable aggregate Exercise Price.

      (c) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price. The Exercise Notice shall also state the name or names (with address) in
which the shares of Common Stock that are issuable on such exercise shall be
issued. In the case of a dispute as to the calculation of the Exercise Price or
the number of Warrant Shares issuable hereunder (including, without limitation,
the calculation of any adjustment pursuant to Section 4 below), the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed and shall submit the disputed calculations to a certified public
accounting firm of national recognition (other than the Company's independent
accountants), reasonably acceptable to Holder, within two (2) business days
following the date on which the Exercise Notice is delivered to the Company. The
Company shall cause such accountant to calculate the Exercise Price and/or the
number of Warrant Shares issuable hereunder and to notify the Company and the
Holder of the results in writing no later than three (3) business days following
the day on which such accountant received the disputed calculations (the
"Dispute Procedure"). Such accountant's calculation shall be deemed conclusive
absent manifest error. The fees of any such accountant shall be borne by the
party whose calculations were most at variance with those of such accountant.

      (d) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (e) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (f) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which

                                      -2-
<PAGE>

this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make

                                      -3-
<PAGE>

delivery on a sale effected in anticipation of receiving Warrant Shares upon
exercise, such damages to be in an amount equal to (A) the aggregate amount paid
by the Holder for the Common Stock so purchased minus (B) the aggregate amount
of net proceeds, if any, received by the Holder from the sale of the Warrant
Shares issued by the Company pursuant to such exercise), and the Holder shall
have the right to pursue all remedies available to it at law or in equity
(including, without limitation, a decree of specific performance and/or
injunctive relief); provided, however, that, in the event, following an Exercise
Default, the Company delivers to the Holder the Warrant Shares that are required
to be issued by the Company pursuant to such exercise, the Holder shall use
commercially reasonable efforts to sell such shares promptly following such
delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after the date of record for
effecting such subdivision, the Exercise Price in effect immediately prior to
such subdivision will be proportionately reduced. Any adjustment made pursuant
to the foregoing sentence that results in a decrease in the Exercise Price shall
also effect a proportional increase in the number of Warrant Shares into which
this Warrant is exercisable. If the Company, at any time after the initial
issuance of this Warrant, combines (by reverse stock split, recapitalization,
reorganization, reclassification or otherwise) its shares of Common Stock into a
smaller number of shares, then, after the date of record for effecting such
combination, the Exercise Price in effect immediately prior to such combination
will be proportionally increased. Any adjustment made pursuant to the foregoing
sentence that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

                                      -4-
<PAGE>

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                  N0 + N1
                  -------
                  N0 + N2

      where:

                  N0 = the number of shares of Common Stock outstanding
                       immediately prior to the issuance, sale or deemed
                       issuance or sale of such additional shares of Common
                       Stock in such Dilutive Issuance without taking into
                       account any shares of Common Stock issuable upon
                       conversion, exchange or exercise of any securities or
                       other instruments which are convertible into or
                       exercisable or exchangeable for Common Stock
                       ("Convertible Securities") or options, warrants or other
                       rights to purchase or subscribe for Common Stock or
                       Convertible Securities ("Purchase Rights");

                  N1 = the number of shares of Common Stock which the aggregate
                       consideration, if any, received or receivable by the
                       Company for the total number of such additional shares of
                       Common Stock so issued, sold or deemed issued or sold in
                       such Dilutive Issuance (which, in the case of a deemed
                       issuance or sale, shall be calculated in accordance with
                       subparagraph (ii) below) would purchase at the Exercise
                       Price in effect immediately prior to such Dilutive
                       Issuance; and

                  N2 = the number of such additional shares of Common Stock so
                       issued, sold or deemed issued or sold in such Dilutive
                       Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the

                                      -5-
<PAGE>

      date of the issuance or sale of such Purchase Rights, be deemed to have
      been issued and sold by the Company for such price per share. For purposes
      of the preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still

                                      -6-
<PAGE>

      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the surviving
      corporation, the amount of consideration therefor will be deemed to be the
      fair market value of such portion of the net assets and business of the
      non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the

                                      -7-
<PAGE>

      Investors named therein, each as amended, modified and supplemented; (7)
      361,800 shares (200,000 shares to James C. Eckert and 161,800 shares to G.
      Darcy Klug) and 100,000 options (40,000 options to James C. Eckert and
      60,000 options to G. Darcy Klug); and (8) 2,924,424 shares issuable upon
      exercise of currently outstanding warrants and "investor options" listed
      on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5. Fractional Interests.

                                      -8-
<PAGE>

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person. Within three
(3) business days of receiving a Transfer Notice and the original of this
Warrant, the Company shall deliver to the each transferee designated by the
Holder a Warrant or Warrants of like tenor and terms for the appropriate number
of Warrant Shares and, if less than all this Warrant is transferred, shall
deliver to the Holder a Warrant for the remaining number of Warrant Shares.

      7. Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8. Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9. Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                                      -9-
<PAGE>

            If to the Company:

            OMNI Energy Services Corp.
            4500 NE Evangeline Thruway
            Carencro, LA 70520
            Attn: James C. Eckert
            Tel: (337) 896-6664
            Fax: (337) 896-6655

            with a copy (not constituting notice) to:

            Locke Liddell & Sapp LLP
            600 Travis, Suite 3200
            Houston, TX 77002
            Attention: David F. Taylor, Esq.
            Tel:  (713) 226-1496
            Fax: (713) 223-3717

            If to Holder:

            At the address set forth below Holder's signature on the Securities
            Purchase Agreement.

            with a copy (not constituting notice) to:

            Solomon Ward Seidenwurm & Smith, LLP
            401 B Street, Suite 1200
            San Diego, CA 92101
            Attn:  Harry J. Proctor, Esq.
            Tel: (619) 231-0303
            Fax: (619) 231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11. Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed

                                      -10-
<PAGE>

in accordance with the laws of the State of Delaware applicable to contracts
made and to be performed entirely within the State of Delaware.

      12. Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13. Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

      14. Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                      -11-
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                             OMNI ENERGY SERVICES CORP.

                                             By: /s/ G. Darcy Klug
                                                 -------------------------------
                                                 G. Darcy Klug
                                                 Executive Vice President
<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date:  May 17, 2005                                        Warrant No. C-4

      THIS CERTIFIES that JAMES C. ECKERT, or any subsequent holder hereof (the
"Holder"), has the right to purchase from OMNI ENERGY SERVICES CORP., a
Louisiana corporation (the "Company"), up to 17,500 fully paid and nonassessable
shares of the Company's common stock, par value $0.01 per share (the "Common
Stock"), subject to adjustment as provided herein, at a price per share equal to
the Exercise Price (as defined below), at any time beginning on the date hereof
(the "the "Issue Date") and ending at 6:00 p.m., eastern time, on the date that
is the fifth (5th) anniversary of the Issue Date (the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $3.50, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made solely in cash or by certified or official bank check payable to the order
of the Company equal to the applicable aggregate Exercise Price.

      (c) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price. The Exercise Notice shall also state the name or names (with address) in
which the shares of Common Stock that are issuable on such exercise shall be
issued. In the case of a dispute as to the calculation of the Exercise Price or
the number of Warrant Shares issuable hereunder (including, without limitation,
the calculation of any adjustment pursuant to Section 4 below), the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed and shall submit the disputed calculations to a certified public
accounting firm of national recognition (other than the Company's independent
accountants), reasonably acceptable to Holder, within two (2) business days
following the date on which the Exercise Notice is delivered to the Company. The
Company shall cause such accountant to calculate the Exercise Price and/or the
number of Warrant Shares issuable hereunder and to notify the Company and the
Holder of the results in writing no later than three (3) business days following
the day on which such accountant received the disputed calculations (the
"Dispute Procedure"). Such accountant's calculation shall be deemed conclusive
absent manifest error. The fees of any such accountant shall be borne by the
party whose calculations were most at variance with those of such accountant.

      (d) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (e) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (f) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which

                                      -2-
<PAGE>

this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make

                                      -3-
<PAGE>

delivery on a sale effected in anticipation of receiving Warrant Shares upon
exercise, such damages to be in an amount equal to (A) the aggregate amount paid
by the Holder for the Common Stock so purchased minus (B) the aggregate amount
of net proceeds, if any, received by the Holder from the sale of the Warrant
Shares issued by the Company pursuant to such exercise), and the Holder shall
have the right to pursue all remedies available to it at law or in equity
(including, without limitation, a decree of specific performance and/or
injunctive relief); provided, however, that, in the event, following an Exercise
Default, the Company delivers to the Holder the Warrant Shares that are required
to be issued by the Company pursuant to such exercise, the Holder shall use
commercially reasonable efforts to sell such shares promptly following such
delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after the date of record for
effecting such subdivision, the Exercise Price in effect immediately prior to
such subdivision will be proportionately reduced. Any adjustment made pursuant
to the foregoing sentence that results in a decrease in the Exercise Price shall
also effect a proportional increase in the number of Warrant Shares into which
this Warrant is exercisable. If the Company, at any time after the initial
issuance of this Warrant, combines (by reverse stock split, recapitalization,
reorganization, reclassification or otherwise) its shares of Common Stock into a
smaller number of shares, then, after the date of record for effecting such
combination, the Exercise Price in effect immediately prior to such combination
will be proportionally increased. Any adjustment made pursuant to the foregoing
sentence that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

                                      -4-
<PAGE>

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                  N0 + N1
                  -------
                  N0 + N2

      where:

                  N0 = the number of shares of Common Stock outstanding
                       immediately prior to the issuance, sale or deemed
                       issuance or sale of such additional shares of Common
                       Stock in such Dilutive Issuance without taking into
                       account any shares of Common Stock issuable upon
                       conversion, exchange or exercise of any securities or
                       other instruments which are convertible into or
                       exercisable or exchangeable for Common Stock
                       ("Convertible Securities") or options, warrants or other
                       rights to purchase or subscribe for Common Stock or
                       Convertible Securities ("Purchase Rights");

                  N1 = the number of shares of Common Stock which the aggregate
                       consideration, if any, received or receivable by the
                       Company for the total number of such additional shares of
                       Common Stock so issued, sold or deemed issued or sold in
                       such Dilutive Issuance (which, in the case of a deemed
                       issuance or sale, shall be calculated in accordance with
                       subparagraph (ii) below) would purchase at the Exercise
                       Price in effect immediately prior to such Dilutive
                       Issuance; and

                  N2 = the number of such additional shares of Common Stock so
                       issued, sold or deemed issued or sold in such Dilutive
                       Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of shares of Common Stock issuable upon the exercise of all
      such Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable) shall, as of the

                                      -5-
<PAGE>

      date of the issuance or sale of such Purchase Rights, be deemed to have
      been issued and sold by the Company for such price per share. For purposes
      of the preceding sentence, the "price per share for which Common Stock is
      issuable upon the exercise of such Purchase Rights" shall be determined by
      dividing (x) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Purchase
      Rights, plus the minimum aggregate amount of additional consideration, if
      any, payable to the Company upon the exercise of all such Purchase Rights,
      plus, in the case of Convertible Securities issuable upon the exercise of
      such Purchase Rights, the minimum aggregate amount of additional
      consideration payable upon the conversion, exercise or exchange of all
      such Convertible Securities (determined in accordance with the calculation
      method set forth in subparagraph (ii)(D) below), by (y) the maximum total
      number of shares of Common Stock issuable upon the exercise of all such
      Purchase Rights (assuming full conversion, exercise or exchange of
      Convertible Securities, if applicable). Except as provided in Section
      4(c)(ii)(C) hereof, no further adjustment to the Exercise Price shall be
      made upon the actual issuance of such Common Stock upon the exercise of
      such Purchase Rights or upon the conversion, exercise or exchange of
      Convertible Securities issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or exercisable or exchangeable for Common Stock, then in
      any such case, the Exercise Price in effect at the time of such change
      shall be readjusted to the Exercise Price which would have been in effect
      at such time had such Purchase Rights or Convertible Securities still

                                      -6-
<PAGE>

      outstanding provided for such changed purchase price, additional
      consideration or changed conversion, exercise or exchange rate, as the
      case may be, at the time initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the surviving
      corporation, the amount of consideration therefor will be deemed to be the
      fair market value of such portion of the net assets and business of the
      non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred stock have not been amended since the
      date hereof; (6) securities issued upon conversion or exercise of
      Debentures or Warrants issued under the Securities Purchase Agreement,
      dated as of February 12, 2004, between the Company and the Investors named
      therein and the Securities Purchase Agreement, dated as of April 15, 2004,
      between the Company and the

                                      -7-
<PAGE>

      Investors named therein, each as amended, modified and supplemented; (7)
      361,800 shares (200,000 shares to James C. Eckert and 161,800 shares to G.
      Darcy Klug) and 100,000 options (40,000 options to James C. Eckert and
      60,000 options to G. Darcy Klug); and (8) 2,924,424 shares issuable upon
      exercise of currently outstanding warrants and "investor options" listed
      on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such shares and/or other securities or assets shall be
subject to adjustment from time to time in a manner and upon terms as nearly
equivalent as practicable to the provisions of this Section 4.

      5. Fractional Interests.

                                      -8-
<PAGE>

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person. Within three
(3) business days of receiving a Transfer Notice and the original of this
Warrant, the Company shall deliver to the each transferee designated by the
Holder a Warrant or Warrants of like tenor and terms for the appropriate number
of Warrant Shares and, if less than all this Warrant is transferred, shall
deliver to the Holder a Warrant for the remaining number of Warrant Shares.

      7. Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8. Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9. Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a day that is
not a business day, in which case such delivery will be deemed to be made on the
next succeeding business day, (ii) on the next business day after timely
delivery to an overnight courier and (iii) on the business day actually received
if deposited in the U.S. mail (certified or registered mail, return receipt
requested, postage prepaid), addressed as follows:

                                      -9-
<PAGE>

            If to the Company:

            OMNI Energy Services Corp.
            4500 NE Evangeline Thruway
            Carencro, LA 70520
            Attn: James C. Eckert
            Tel: (337) 896-6664
            Fax: (337) 896-6655

            with a copy (not constituting notice) to:

            Locke Liddell & Sapp LLP
            600 Travis, Suite 3200
            Houston, TX 77002
            Attention: David F. Taylor, Esq.
            Tel: (713) 226-1496
            Fax: (713) 223-3717

            If to Holder:

            At the address set forth below Holder's signature on the Securities
            Purchase Agreement.

            with a copy (not constituting notice) to:

            Solomon Ward Seidenwurm & Smith, LLP
            401 B Street, Suite 1200
            San Diego, CA 92101
            Attn:  Harry J. Proctor, Esq.
            Tel: (619) 231-0303
            Fax: (619) 231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert witness fees.

      11. Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed

                                      -10-
<PAGE>

in accordance with the laws of the State of Delaware applicable to contracts
made and to be performed entirely within the State of Delaware.

      12. Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13. Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

      14. Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                      -11-
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                               OMNI ENERGY SERVICES CORP.

                                               By: /s/ G. Darcy Klug
                                                   -----------------------------
                                                   G. Darcy Klug
                                                   Executive Vice President
<PAGE>

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES
ACT"), OR ANY STATE SECURITIES LAW, AND MAY NOT BE OFFERED FOR SALE, SOLD OR
TRANSFERRED UNLESS A REGISTRATION STATEMENT UNDER SUCH ACT AND APPLICABLE STATE
SECURITIES LAWS SHALL BE EFFECTIVE WITH RESPECT THERETO, OR AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS IS
AVAILABLE IN CONNECTION WITH SUCH OFFER, SALE OR TRANSFER.

                        WARRANT TO PURCHASE COMMON STOCK

                                       OF

                           OMNI ENERGY SERVICES CORP.

Issue Date:  May 17, 2005                                        Warrant No. C-5

      THIS CERTIFIES that G. DARCY KLUG, or any subsequent holder hereof (the
"Holder"), has the right to purchase from OMNI ENERGY SERVICES CORP., a
Louisiana corporation (the "Company"), up to 17,500 fully paid and nonassessable
shares of the Company's common stock, par value $0.01 per share (the "Common
Stock"), subject to adjustment as provided herein, at a price per share equal to
the Exercise Price (as defined below), at any time beginning on the date hereof
(the "the "Issue Date") and ending at 6:00 p.m., eastern time, on the date that
is the fifth (5th) anniversary of the Issue Date (the "Expiration Date").

      1. Exercise.

      (a) Right to Exercise. The Holder shall have the right to exercise this
Warrant at any time and from time to time during the period beginning on the
Issue Date and ending on the Expiration Date as to all or any part of the shares
of Common Stock covered hereby (the "Warrant Shares").

      (b) Exercise Price. The "Exercise Price" for each Warrant Share purchased
by the Holder upon the exercise of this Warrant shall be equal to $3.50, subject
to adjustment for the events specified in Section 4 below; provided, however,
until this Warrant, the Securities Purchase Agreement between the Company and
Holder dated as of the date hereof (the "Securities Purchase Agreement") and the
transactions contemplated herein and therein are approved by the holders of a
majority of the outstanding shares of capital stock of the Company entitled to
vote, excluding the holders of Series C Convertible Preferred Stock
("Shareholder Approval"), in no event shall the

<PAGE>

Exercise Price be less than $1.95, other than as a result of adjustments for the
events specified in Section 4(a) below. Payment of the Exercise Price may be
made solely in cash or by certified or official bank check payable to the order
of the Company equal to the applicable aggregate Exercise Price.

      (c) Exercise Notice. In order to exercise this Warrant, the Holder shall
send by facsimile transmission, at any time prior to 6:00 p.m., eastern time, on
the business day (which means any day other than a Saturday, a Sunday or a day
which commercial banks located in New York City are permitted by law to close)
on which the Holder wishes to effect such exercise (the "Exercise Date"), to the
Company an executed copy of the notice of exercise in the form attached hereto
as Exhibit A (the "Exercise Notice"), the original Warrant and the Exercise
Price. The Exercise Notice shall also state the name or names (with address) in
which the shares of Common Stock that are issuable on such exercise shall be
issued. In the case of a dispute as to the calculation of the Exercise Price or
the number of Warrant Shares issuable hereunder (including, without limitation,
the calculation of any adjustment pursuant to Section 4 below), the Company
shall promptly issue to the Holder the number of Warrant Shares that are not
disputed and shall submit the disputed calculations to a certified public
accounting firm of national recognition (other than the Company's independent
accountants), reasonably acceptable to Holder, within two (2) business days
following the date on which the Exercise Notice is delivered to the Company. The
Company shall cause such accountant to calculate the Exercise Price and/or the
number of Warrant Shares issuable hereunder and to notify the Company and the
Holder of the results in writing no later than three (3) business days following
the day on which such accountant received the disputed calculations (the
"Dispute Procedure"). Such accountant's calculation shall be deemed conclusive
absent manifest error. The fees of any such accountant shall be borne by the
party whose calculations were most at variance with those of such accountant.

      (d) Limitations on Exercise. Notwithstanding anything to the contrary
contained herein, until Shareholder Approval is obtained, no holder of this
Warrant shall be entitled to exercise this Warrant, if after exercise such
holder will, with the shares of Common Stock issued on exercise and any other
shares of the Company's Common Stock then held by such holder, hold more than
19.99% of the outstanding Common Stock or voting power of the Company on the
date of such exercise.

      (e) Holder of Record. The Holder shall, for all purposes, be deemed to
have become the holder of record of the Warrant Shares specified in an Exercise
Notice on the Exercise Date specified therein, irrespective of the date of
delivery of such Warrant Shares. Except as specifically provided herein, nothing
in this Warrant shall be construed as conferring upon the Holder hereof any
rights as a stockholder of the Company prior to the Exercise Date.

      (f) Cancellation of Warrant. This Warrant shall be canceled upon its
exercise and, if this Warrant is exercised in part, the Company shall, at the
time that it delivers Warrant Shares to the Holder pursuant to such exercise as
provided herein, issue a new warrant, and deliver to the Holder a certificate
representing such new warrant, with terms identical in all respects to this
Warrant (except that such new warrant shall be exercisable into the number of
shares of Common Stock with respect to which this Warrant shall remain
unexercised); provided, however, that the Holder shall be entitled to exercise
all or any portion of such new warrant at any time following the time at which

                                      -2-
<PAGE>

this Warrant is exercised, regardless of whether the Company has actually issued
such new warrant or delivered to the Holder a certificate therefor.

      2. Delivery of Warrant Shares Upon Exercise. Upon receipt of an Exercise
Notice pursuant to Section 1 above, the Company shall, (A) no later than the
close of business on the later to occur of (i) the third (3rd) business day
following the Exercise Date set forth in such Exercise Notice and (ii) such
later date on which the Company shall have received payment of the Exercise
Price, and (B) with respect to Warrant Shares that are the subject of a Dispute
Procedure, the close of business on the third (3rd) business day following the
determination made pursuant to Section 1(b) (each of the dates specified in (A)
or (B) being referred to as a "Delivery Date"), issue and deliver or caused to
be delivered to the Holder the number of Warrant Shares as shall be determined
as provided herein. The Company shall effect delivery of Warrant Shares to the
Holder by, as long as the Transfer Agent participates in the Depository Trust
Company ("DTC") Fast Automated Securities Transfer program ("FAST"), crediting
the account of the Holder or its nominee at DTC (as specified in the applicable
Exercise Notice) with the number of Warrant Shares required to be delivered, no
later than the close of business on such Delivery Date. In the event that the
Transfer Agent is not a participant in FAST, or if the Warrant Shares are not
otherwise eligible for delivery through FAST, or if the Holder so specifies in
an Exercise Notice or otherwise in writing on or before the Exercise Date, the
Company shall effect delivery of Warrant Shares by delivering to the Holder or
its nominee physical certificates representing such Warrant Shares, no later
than the close of business on such Delivery Date.

      3. Failure to Deliver Warrant Shares.

      (a) In the event that the Company fails for any reason to deliver to the
Holder the number of Warrant Shares specified in the applicable Exercise Notice
on or before the Delivery Date therefor (an "Exercise Default"), and such
default continues for seven (7) business days following delivery of a written
notice of such default by the Holder to the Company, the Company shall pay to
the Holder payments ("Exercise Default Payments") in the amount of (i) (N/365)
multiplied by (ii) the aggregate Exercise Price of the Warrant Shares which are
the subject of such Exercise Default multiplied by (iii) the lower of ten
percent (10%) and the maximum rate permitted by applicable law (the "Default
Interest Rate"), where "N" equals the number of days elapsed between the
original Delivery Date of such Warrant Shares and the date on which all of such
Warrant Shares are issued and delivered to the Holder. Cash amounts payable
hereunder shall be paid on or before the fifth (5th) business day of the
calendar month following the calendar month in which such amount has accrued.

      (b) In the event that the Holder has not received certificates
representing the Warrant Shares by the seventh (7th) business day following an
Exercise Default, the Holder may notify the Company in writing of its election
to revoke the Exercise Notice that is the subject of such default, in which
case, effective as of the date of such revocation notice, such Exercise Notice
shall be deemed rescinded and of no further force or effect.

      (c) Nothing herein shall limit the Holder's right to pursue actual damages
for the Company's failure to issue and deliver Warrant Shares on the applicable
Delivery Date (including, without limitation, damages relating to any purchase
of Common Stock by the Holder to make

                                      -3-
<PAGE>

delivery on a sale effected in anticipation of receiving Warrant Shares upon
exercise, such damages to be in an amount equal to (A) the aggregate amount paid
by the Holder for the Common Stock so purchased minus (B) the aggregate amount
of net proceeds, if any, received by the Holder from the sale of the Warrant
Shares issued by the Company pursuant to such exercise), and the Holder shall
have the right to pursue all remedies available to it at law or in equity
(including, without limitation, a decree of specific performance and/or
injunctive relief); provided, however, that, in the event, following an Exercise
Default, the Company delivers to the Holder the Warrant Shares that are required
to be issued by the Company pursuant to such exercise, the Holder shall use
commercially reasonable efforts to sell such shares promptly following such
delivery.

      4. Anti-Dilution Adjustments; Distributions; Other Events. The Exercise
Price and the number of Warrant Shares issuable hereunder shall be subject to
adjustment from time to time as provided in this Section 4. In the event that
any adjustment of the Exercise Price or the number of Warrant Shares as required
herein results in a fraction of a cent or fraction of a share, as applicable,
such Exercise Price or number of Warrant Shares shall be rounded up or down to
the nearest cent or share, as applicable.

      (a) Subdivision or Combination of Common Stock. If the Company, at any
time after the Issue Date, subdivides (by any stock split, stock dividend,
recapitalization, reorganization, reclassification or otherwise) its shares of
Common Stock into a greater number of shares, then after the date of record for
effecting such subdivision, the Exercise Price in effect immediately prior to
such subdivision will be proportionately reduced. Any adjustment made pursuant
to the foregoing sentence that results in a decrease in the Exercise Price shall
also effect a proportional increase in the number of Warrant Shares into which
this Warrant is exercisable. If the Company, at any time after the initial
issuance of this Warrant, combines (by reverse stock split, recapitalization,
reorganization, reclassification or otherwise) its shares of Common Stock into a
smaller number of shares, then, after the date of record for effecting such
combination, the Exercise Price in effect immediately prior to such combination
will be proportionally increased. Any adjustment made pursuant to the foregoing
sentence that results in an increase in the Exercise Price shall also effect a
proportional decrease in the number of Warrant Shares into which this Warrant is
exercisable.

      (b) Distributions. If the Company shall declare or make any distribution
of its assets (or rights to acquire its assets) to holders of Common Stock as a
partial liquidating dividend or otherwise (including any dividend or
distribution to the Company's stockholders in cash or shares (or rights to
acquire shares) of capital stock of a subsidiary) (a "Distribution"), the
Company shall deliver written notice of such Distribution (a "Distribution
Notice") to the Holder at least five (5) business days prior to the earlier to
occur of (i) the record date for determining stockholders entitled to such
Distribution (the "Record Date") and (ii) the date on which such Distribution is
made (the "Distribution Date"). The Holder shall be entitled to receive the same
amount and type of assets being distributed in such Distribution as though the
Holder were a holder on the Record Date therefor of a number of shares of Common
Stock into which this Warrant is exercisable as of such Record Date (such number
of shares to be determined at the Exercise Price then in effect and without
giving effect to any limitations on such exercise contained in this Warrant or
the Subscription Agreement).

      (c) Dilutive Issuances.

                                      -4-
<PAGE>

            (i) Adjustment Upon Dilutive Issuance. If, at any time after the
Issue Date, the Company issues or sells, or in accordance with subparagraph (ii)
of this Section 4(c), is deemed to have issued or sold, any shares of Common
Stock for no consideration or for a consideration per share less than the
Exercise Price on the date of such issuance or sale (or deemed issuance or sale)
(a "Dilutive Issuance"), then effective immediately upon the Dilutive Issuance,
the Exercise Price shall be adjusted so as to equal an amount determined by
multiplying such Exercise Price by the following fraction:

                  N0 + N1
                  -------
                  N0 + N2

      where:

                  N0 = the number of shares of Common Stock outstanding
                       immediately prior to the issuance, sale or deemed
                       issuance or sale of such additional shares of Common
                       Stock in such Dilutive Issuance without taking into
                       account any shares of Common Stock issuable upon
                       conversion, exchange or exercise of any securities or
                       other instruments which are convertible into or
                       exercisable or exchangeable for Common Stock
                       ("Convertible Securities") or options, warrants or other
                       rights to purchase or subscribe for Common Stock or
                       Convertible Securities ("Purchase Rights");

                  N1 = the number of shares of Common Stock which the aggregate
                       consideration, if any, received or receivable by the
                       Company for the total number of such additional shares of
                       Common Stock so issued, sold or deemed issued or sold in
                       such Dilutive Issuance (which, in the case of a deemed
                       issuance or sale, shall be calculated in accordance with
                       subparagraph (ii) below) would purchase at the Exercise
                       Price in effect immediately prior to such Dilutive
                       Issuance; and

                  N2 = the number of such additional shares of Common Stock so
                       issued, sold or deemed issued or sold in such Dilutive
                       Issuance.

      Notwithstanding the foregoing, no adjustment shall be made pursuant hereto
if such adjustment would result in an increase in the Exercise Price.

            (ii) Effect On Exercise Price Of Certain Events. For purposes of
determining the adjusted Exercise Price under subparagraph (i) of this Section
4(c), the following will be applicable:

                  (A) Issuance Of Purchase Rights. If the Company issues or
      sells any Purchase Rights, whether or not immediately exercisable, and the
      price per share for which Common Stock is issuable upon the exercise of
      such Purchase Rights (and the price of any conversion of Convertible
      Securities, if applicable) is less than the Exercise Price in effect on
      the date of issuance or sale of such Purchase Rights, then the maximum
      total number of

                                      -5-
<PAGE>

      shares of Common Stock issuable upon the exercise of all such Purchase
      Rights (assuming full conversion, exercise or exchange of Convertible
      Securities, if applicable) shall, as of the date of the issuance or sale
      of such Purchase Rights, be deemed to have been issued and sold by the
      Company for such price per share. For purposes of the preceding sentence,
      the "price per share for which Common Stock is issuable upon the exercise
      of such Purchase Rights" shall be determined by dividing (x) the total
      amount, if any, received or receivable by the Company as consideration for
      the issuance or sale of all such Purchase Rights, plus the minimum
      aggregate amount of additional consideration, if any, payable to the
      Company upon the exercise of all such Purchase Rights, plus, in the case
      of Convertible Securities issuable upon the exercise of such Purchase
      Rights, the minimum aggregate amount of additional consideration payable
      upon the conversion, exercise or exchange of all such Convertible
      Securities (determined in accordance with the calculation method set forth
      in subparagraph (ii)(D) below), by (y) the maximum total number of shares
      of Common Stock issuable upon the exercise of all such Purchase Rights
      (assuming full conversion, exercise or exchange of Convertible Securities,
      if applicable). Except as provided in Section 4(c)(ii)(C) hereof, no
      further adjustment to the Exercise Price shall be made upon the actual
      issuance of such Common Stock upon the exercise of such Purchase Rights or
      upon the conversion, exercise or exchange of Convertible Securities
      issuable upon exercise of such Purchase Rights.

                  (B) Issuance Of Convertible Securities. If the Company issues
      or sells any Convertible Securities, whether or not immediately
      convertible, exercisable or exchangeable, and the price per share for
      which Common Stock is issuable upon such conversion, exercise or exchange
      is less than the Exercise Price in effect on the date of issuance or sale
      of such Convertible Securities, then the maximum total number of shares of
      Common Stock issuable upon the conversion, exercise or exchange of all
      such Convertible Securities shall, as of the date of the issuance or sale
      of such Convertible Securities, be deemed to have been issued and sold by
      the Company for such price per share. For the purposes of the immediately
      preceding sentence, the "price per share for which Common Stock is
      issuable upon such conversion, exercise or exchange" shall be determined
      by dividing (A) the total amount, if any, received or receivable by the
      Company as consideration for the issuance or sale of all such Convertible
      Securities, plus the minimum aggregate amount of additional consideration,
      if any, payable to the Company upon the conversion, exercise or exchange
      of all such Convertible Securities (determined in accordance with the
      calculation method set forth in subparagraph (ii)(D)), by (B) the maximum
      total number of shares of Common Stock issuable upon the exercise,
      conversion or exchange of all such Convertible Securities. Except as
      provided in Section 4(c)(ii)(C) hereof, no further adjustment to the
      Exercise Price shall be made upon the actual issuance of such Common Stock
      upon conversion, exercise or exchange of such Convertible Securities.

                  (C) Change In Option Price Or Conversion Rate. If there is a
      change at any time in (x) the purchase price or amount of additional
      consideration payable to the Company upon the exercise of any Purchase
      Rights; (y) the amount of additional consideration, if any, payable to the
      Company upon the conversion, exercise or exchange of any Convertible
      Securities the adjustment for which is not otherwise covered under Section
      4(c)(ii)(B) above; or (z) the rate at which any Convertible Securities are
      convertible into or

                                      -6-
<PAGE>

      exercisable or exchangeable for Common Stock, then in any such case, the
      Exercise Price in effect at the time of such change shall be readjusted to
      the Exercise Price which would have been in effect at such time had such
      Purchase Rights or Convertible Securities still outstanding provided for
      such changed purchase price, additional consideration or changed
      conversion, exercise or exchange rate, as the case may be, at the time
      initially issued or sold.

                  (D) Calculation Of Consideration Received. If any Common
      Stock, Purchase Rights or Convertible Securities are issued or sold for
      cash, the consideration received therefor will be the amount received by
      the Company therefor, after deduction of all underwriting discounts or
      allowances in connection with such issuance, grant or sale. In case any
      Common Stock, Purchase Rights or Convertible Securities are issued or sold
      for a consideration part or all of which shall be other than cash,
      including in the case of a strategic or similar arrangement in which the
      other entity will provide services to the Company, purchase services from
      the Company or otherwise provide intangible consideration to the Company,
      the amount of the consideration other than cash received by the Company
      (including the net present value of the consideration expected by the
      Company for the provided or purchased services) shall be the fair market
      value of such consideration, except where such consideration consists of
      securities, in which case the amount of consideration received by the
      Company will be the average of the last sale prices thereof on the
      principal market for such securities during the period of ten Trading Days
      immediately preceding the date of receipt. In case any Common Stock,
      Purchase Rights or Convertible Securities are issued in connection with
      any merger or consolidation in which the Company is the surviving
      corporation, the amount of consideration therefor will be deemed to be the
      fair market value of such portion of the net assets and business of the
      non-surviving corporation as is attributable to such Common Stock,
      Purchase Rights or Convertible Securities, as the case may be. The
      independent members of the Company's Board of Directors shall calculate
      reasonably and in good faith, using standard commercial valuation methods
      appropriate for valuing such assets, the fair market value of any
      consideration other than cash or securities; provided, however, that if
      the Holder does not agree to such fair market value calculation within
      three business days after receipt thereof from the Company, then such fair
      market value shall be determined in good faith by an investment banker or
      other appropriate expert of national reputation selected by the Holder and
      reasonably acceptable to the Company, with the costs of such appraisal to
      be borne by the Company.

                  (iii) Exceptions To Adjustment Of Exercise Price.
      Notwithstanding the foregoing, no adjustment to the Exercise Price shall
      be made pursuant to this Section 4(c) upon the issuance of any Excluded
      Securities. For purposes hereof, "Excluded Securities" means (1)
      securities purchased under the Securities Purchase Agreement; (2)
      securities issued upon conversion or exercise of the Series C 9%
      Convertible Preferred Stock or the Warrants (as defined in the Securities
      Purchase Agreement); (3) shares of Common Stock issuable or issued to
      employees, consultants or directors from time to time upon the exercise of
      options, in such case granted or to be granted in the discretion of the
      Board of Directors pursuant to one or more stock option plans or
      restricted stock plans in effect as of the Issue Date; (4) shares of
      Common Stock issued in connection with any stock split, stock dividend or
      recapitalization of the Company; (5) securities issued upon conversion of
      outstanding shares of Series B 8% Convertible Preferred Stock, provided
      that the terms of such preferred

                                      -7-
<PAGE>

      stock have not been amended since the date hereof; (6) securities issued
      upon conversion or exercise of Debentures or Warrants issued under the
      Securities Purchase Agreement, dated as of February 12, 2004, between the
      Company and the Investors named therein and the Securities Purchase
      Agreement, dated as of April 15, 2004, between the Company and the
      Investors named therein, each as amended, modified and supplemented; (7)
      361,800 shares (200,000 shares to James C. Eckert and 161,800 shares to G.
      Darcy Klug) and 100,000 options (40,000 options to James C. Eckert and
      60,000 options to G. Darcy Klug); and (8) 2,924,424 shares issuable upon
      exercise of currently outstanding warrants and "investor options" listed
      on Schedule 1 hereto.

            (iv) Notice Of Adjustments. Upon the occurrence of each adjustment
or readjustment of the Exercise Price pursuant to this Section 4(c) resulting in
a change in the Exercise Price by more than one percent (1%), or any change in
the number or type of stock, securities and/or other property issuable upon
exercise of this Warrant, the Company, at its expense, shall promptly compute
such adjustment or readjustment or change and prepare and furnish to the Holder
a certificate setting forth such adjustment or readjustment or change and
showing in detail the facts upon which such adjustment or readjustment or change
is based. The Company shall, upon the written request at any time of the Holder,
furnish to the Holder a like certificate setting forth (i) such adjustment or
readjustment or change, (ii) the Exercise Price at the time in effect and (iii)
the number of shares of Common Stock and the amount, if any, of other securities
or property which at the time would be received upon exercise of this Warrant.

      (d) Major Transactions. In the event of a merger, consolidation, business
combination, tender offer, exchange of shares, recapitalization, reorganization,
redemption or other similar event, as a result of which shares of Common Stock
of the Company shall be changed into the same or a different number of shares of
the same or another class or classes of stock or securities or other assets of
the Company or another entity or the Company shall sell all or substantially all
of its assets (each of the foregoing being a "Major Transaction"), the Company
will give the Holder at least twenty (20) days written notice prior to the
closing of such Major Transaction in a manner that does not constitute
disclosure of material non-public information (unless otherwise previously
consented to in writing by the Holder), and: (i) the Holder shall be permitted
to exercise this Warrant in whole or in part at any time prior to the record
date for the receipt of such consideration and shall be entitled to receive, for
each share of Common Stock issuable to Holder for such exercise, the same per
share consideration payable to the other holders of Common Stock in connection
with such Major Transaction, and (ii) if and to the extent that the Holder
retains any portion of this Warrant following such record date, the Company will
cause the surviving or, in the event of a sale of assets, purchasing entity, as
a condition precedent to such Major Transaction, to assume the obligations of
the Company under this Warrant, with such adjustments to the Exercise Price and
the securities covered hereby as may be necessary in order to preserve the
economic benefits of this Warrant to the Holder.

      (e) Adjustments; Additional Shares, Securities or Assets. In the event
that at any time, as a result of an adjustment made pursuant to this Section 4,
the Holder of this Warrant shall, upon exercise of this Warrant, become entitled
to receive securities or assets (other than Common Stock) then, wherever
appropriate, all references herein to shares of Common Stock shall be deemed to
refer to and include such shares and/or other securities or assets; and
thereafter the number of such

                                      -8-
<PAGE>

shares and/or other securities or assets shall be subject to adjustment from
time to time in a manner and upon terms as nearly equivalent as practicable to
the provisions of this Section 4.

      5. Fractional Interests.

            No fractional shares or scrip representing fractional shares shall
be issuable upon the exercise of this Warrant, but on exercise of this Warrant,
the Holder hereof may purchase only a whole number of shares of Common Stock.
If, on exercise of this Warrant, the Holder hereof would be entitled to a
fractional share of Common Stock or a right to acquire a fractional share of
Common Stock, the Company shall, in lieu of issuing any such fractional share,
pay to the Holder an amount in cash equal to the product resulting from
multiplying such fraction by the market price as of the Exercise Date.

      6. Transfer of this Warrant.

            The Holder may sell, transfer, assign, pledge or otherwise dispose
of this Warrant, in whole or in part, as long as such sale or other disposition
is made pursuant to an effective registration statement or an exemption from the
registration requirements of the Securities Act. Upon such transfer or other
disposition, the Holder shall deliver this Warrant to the Company together with
a written notice to the Company, substantially in the form of the Transfer
Notice attached hereto as Exhibit B (the "Transfer Notice"), indicating the
person or persons to whom this Warrant shall be transferred and, if less than
all of this Warrant is transferred, the number of Warrant Shares to be covered
by the part of this Warrant to be transferred to each such person. Within three
(3) business days of receiving a Transfer Notice and the original of this
Warrant, the Company shall deliver to the each transferee designated by the
Holder a Warrant or Warrants of like tenor and terms for the appropriate number
of Warrant Shares and, if less than all this Warrant is transferred, shall
deliver to the Holder a Warrant for the remaining number of Warrant Shares.

      7. Benefits of this Warrant.

            This Warrant shall be for the sole and exclusive benefit of the
Holder of this Warrant and nothing in this Warrant shall be construed to confer
upon any person other than the Holder of this Warrant any legal or equitable
right, remedy or claim hereunder.

      8. Loss, theft, destruction or mutilation of Warrant.

            Upon receipt by the Company of evidence of the loss, theft,
destruction or mutilation of this Warrant, and (in the case of loss, theft or
destruction) of indemnity reasonably satisfactory to the Company, and upon
surrender of this Warrant, if mutilated, the Company shall execute and deliver a
new Warrant of like tenor and date.

      9. Notice or Demands.

            Any notice, demand or request required or permitted to be given by
the Company or the Holder pursuant to the terms of this Warrant shall be in
writing and shall be deemed delivered (i) when delivered personally or by
verifiable facsimile transmission, unless such delivery is made on a

                                      -9-
<PAGE>

day that is not a business day, in which case such delivery will be deemed to be
made on the next succeeding business day, (ii) on the next business day after
timely delivery to an overnight courier and (iii) on the business day actually
received if deposited in the U.S. mail (certified or registered mail, return
receipt requested, postage prepaid), addressed as follows:

            If to the Company:

            OMNI Energy Services Corp.
            4500 NE Evangeline Thruway
            Carencro, LA 70520
            Attn: James C. Eckert
            Tel: (337) 896-6664
            Fax: (337) 896-6655

            with a copy (not constituting notice) to:

            Locke Liddell & Sapp LLP
            600 Travis, Suite 3200
            Houston, TX 77002
            Attention: David F. Taylor, Esq.
            Tel: (713) 226-1496
            Fax: (713) 223-3717

            If to Holder:

            At the address set forth below Holder's signature on the Securities
            Purchase Agreement.

            with a copy (not constituting notice) to:

            Solomon Ward Seidenwurm & Smith, LLP
            401 B Street, Suite 1200
            San Diego, CA 92101
            Attn:  Harry J. Proctor, Esq.
            Tel: (619) 231-0303
            Fax: (619) 231-4755

      10. Attorney's Fees. In the event any litigation, arbitration, mediation,
or other proceeding ("Proceeding") is initiated by any party(ies) against any
other party(ies) to enforce, interpret or otherwise obtain judicial or
quasi-judicial relief in connection with this Agreement, the prevailing
party(ies) in such Proceeding shall be entitled to recover from the unsuccessful
party(ies) all costs, expenses, actual attorney's and expert witness fees,
relating to or arising out of (1) such Proceeding (whether or not such
Proceeding proceeds to judgment), and (2) any post-judgment or post-award
proceeding including, without limitation, one to enforce any judgment or award
resulting from any such Proceeding. Any such judgment or award shall contain a
specific provision for the recovery of all such subsequently incurred costs,
expenses, actual attorney and expert

                                      -10-
<PAGE>

witness fees.

      11. Applicable Law.

            This Warrant is issued under and shall for all purposes be governed
by and construed in accordance with the laws of the State of Delaware applicable
to contracts made and to be performed entirely within the State of Delaware.

      12. Amendments.

            No amendment, modification or other change to, or waiver of any
provision of, this Warrant may be made unless such amendment, modification or
change is set forth in writing and is signed by the Company and the Holder.

      13. Entire Agreement.

      This Warrant, the Securities Purchase Agreement and the Registration
Rights Agreement, and the schedules and exhibits hereto and thereto, constitute
the entire agreement among the parties hereto with respect to the subject matter
hereof and thereof. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein and therein. This
Warrant, the Securities Purchase Agreement and the Registration Rights Agreement
supersede all prior agreements and understandings among the parties hereto with
respect to the subject matter hereof and thereof.

      14. Headings.

      The headings in this Warrant are for convenience of reference only and
shall not limit or otherwise affect the meaning hereof.

                           [Signature Page to Follow]

                                      -11-
<PAGE>

      IN WITNESS WHEREOF, the Company has duly executed and delivered this
Warrant as of the Issue Date.

                                              OMNI ENERGY SERVICES CORP.

                                              By: /s/ James C. Eckert
                                                  ------------------------------
                                                  James C. Eckert
                                                  President

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