Document:

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                                                                   EXHIBIT 4(b)

                                  $225,000,000

                             DENBURY RESOURCES INC.

                   7 1/2 % SENIOR SUBORDINATED NOTES DUE 2013

                          REGISTRATION RIGHTS AGREEMENT

                                                                 March 25, 2003

Credit Suisse First Boston LLC
   Eleven Madison Avenue
     New York, New York 10010-3629

Dear Sirs:

         Denbury Resources Inc., a Delaware corporation (the "Issuer"), proposes
to issue and sell, upon the terms set forth in a purchase agreement of even date
herewith (the "Purchase Agreement"), to Credit Suisse First Boston LLC (the
"Initial Purchaser"), $225,000,000 aggregate principal amount of its 7 1/2 %
Senior Subordinated Notes Due 2013 (the "Initial Securities") to be guaranteed
(the "Guaranties") by each Subsidiary Guarantor (the "Guarantors" and,
collectively with the Issuer, the "Company"). The Initial Securities will be
issued pursuant to an Indenture, dated as of March 25, 2003 (the "Indenture"),
among the Issuer, the Guarantors named therein and JPMorgan Chase Bank, as
trustee (the "Trustee"). As an inducement to the Initial Purchaser to enter into
the Purchase Agreement, the Company agrees with the Initial Purchaser, for the
benefit of the Initial Purchaser and the holders of the Securities (as defined
below) (collectively the "Holders"), as follows:

         1. Registered Exchange Offer. Unless not permitted by applicable law
(after the Company has complied with the ultimate paragraph of this Section 1),
the Company shall prepare and, not later than 90 days (such 90th day being a
"Filing Deadline") after the date on which the Initial Purchaser purchases the
Initial Securities pursuant to the Purchase Agreement (the "Closing Date"), file
with the Securities and Exchange Commission (the "Commission") a registration
statement (the "Exchange Offer Registration Statement") on an appropriate form
under the Securities Act of 1933, as amended (the "Securities Act"), with
respect to a proposed offer (the "Registered Exchange Offer") to the Holders of
Transfer Restricted Securities (as defined in Section 6 hereof), who are not
prohibited by any law or policy of the Commission from participating in the
Registered Exchange Offer, to issue and deliver to such Holders, in exchange for
the Initial Securities, a like aggregate principal amount of debt securities of
the Company issued under the Indenture, identical in all material respects to
the Initial Securities and registered under the Securities Act (the "Exchange
Securities"). The Company shall use its best efforts to (i) cause such Exchange
Offer Registration Statement to become effective under the Securities Act within
180 days after the Closing Date (such 180th day being an "Effectiveness
Deadline") and (ii) keep the Exchange Offer Registration Statement effective for
not less than 30 days (or longer, if required by applicable law) after the date
notice of the Registered Exchange Offer is mailed to the Holders (such period
being called the "Exchange Offer Registration Period").

         If the Company commences the Registered Exchange Offer, the Company (i)
will be entitled to consummate the Registered Exchange Offer 30 days after such
commencement (provided that the Company has accepted all the Initial Securities
theretofore validly tendered in accordance with the terms of the Registered
Exchange Offer) and (ii) will be required to consummate the Registered Exchange
Offer no later

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than 40 days after the date on which the Exchange Offer Registration Statement
is declared effective (such 40th day being the "Consummation Deadline").

         Following the declaration of the effectiveness of the Exchange Offer
Registration Statement, the Company shall promptly commence the Registered
Exchange Offer, it being the objective of such Registered Exchange Offer to
enable each Holder of Transfer Restricted Securities electing to exchange the
Initial Securities for Exchange Securities (assuming that such Holder is not an
affiliate of the Company within the meaning of the Securities Act, acquires the
Exchange Securities in the ordinary course of such Holder's business and has no
arrangements with any person to participate in the distribution of the Exchange
Securities and is not prohibited by any law or policy of the Commission from
participating in the Registered Exchange Offer) to trade such Exchange
Securities from and after their receipt without any limitations or restrictions
under the Securities Act and without material restrictions under the securities
laws of the several states of the United States.

         The Company acknowledges that, pursuant to current interpretations by
the Commission's staff of Section 5 of the Securities Act, in the absence of an
applicable exemption therefrom, (i) each Holder which is a broker-dealer
electing to exchange Initial Securities, acquired for its own account as a
result of market making activities or other trading activities, for Exchange
Securities (an "Exchanging Dealer"), is required to deliver a prospectus
containing the information set forth in (a) Annex A hereto on the cover, (b)
Annex B hereto in the "Exchange Offer Procedures" section and the "Purpose of
the Exchange Offer" section, and (c) Annex C hereto in the "Plan of
Distribution" section of such prospectus in connection with a sale of any such
Exchange Securities received by such Exchanging Dealer pursuant to the
Registered Exchange Offer and (ii) an Initial Purchaser that elects to sell
Securities (as defined below) acquired in exchange for Initial Securities
constituting any portion of an unsold allotment, is required to deliver a
prospectus containing the information required by Items 507 or 508 of Regulation
S-K under the Securities Act, as applicable, in connection with such sale.

         The Company shall use its best efforts to keep the Exchange Offer
Registration Statement effective and to amend and supplement the prospectus
contained therein, in order to permit such prospectus to be lawfully delivered
by all persons subject to the prospectus delivery requirements of the Securities
Act for such period of time as such persons must comply with such requirements
in order to resell the Exchange Securities; provided, however, that (i) in the
case where such prospectus and any amendment or supplement thereto must be
delivered by an Exchanging Dealer or the Initial Purchaser, such period shall be
the lesser of 180 days and the date on which all Exchanging Dealers and the
Initial Purchaser have sold all Exchange Securities held by them (unless such
period is extended pursuant to Section 3(j) below) and (ii) the Company shall
make such prospectus and any amendment or supplement thereto available to any
broker-dealer for use in connection with any resale of any Exchange Securities
for a period of not less than 180 days after the consummation of the Registered
Exchange Offer.

         If, upon consummation of the Registered Exchange Offer, the Initial
Purchaser holds Initial Securities acquired by it as part of its initial
distribution, the Company, simultaneously with the delivery of the Exchange
Securities pursuant to the Registered Exchange Offer, shall issue and deliver to
the Initial Purchaser upon the written request of the Initial Purchaser, in
exchange (the "Private Exchange") for the Initial Securities held by the Initial
Purchaser, a like principal amount of debt securities of the Company issued
under the Indenture and identical in all material respects to the Initial
Securities (the "Private Exchange Securities"). The Initial Securities, the
Exchange Securities and the Private Exchange Securities are herein collectively
called the "Securities".

         In connection with the Registered Exchange Offer, the Company shall:

             (a) mail to each Holder a copy of the prospectus forming part of
         the Exchange Offer Registration Statement, together with an appropriate
         letter of transmittal and related documents;

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             (b) keep the Registered Exchange Offer open for not less than 30
         days (or longer, if required by applicable law) after the date notice
         thereof is mailed to the Holders;

             (c) utilize the services of a depositary for the Registered
         Exchange Offer with an address in the Borough of Manhattan, The City of
         New York, which may be the Trustee or an affiliate of the Trustee;

             (d) permit Holders to withdraw tendered Securities at any time
         prior to the close of business, New York time, on the last business day
         on which the Registered Exchange Offer shall remain open; and

             (e) otherwise comply with all applicable laws.

         As soon as practicable after the close of the Registered Exchange Offer
or the Private Exchange, as the case may be, the Company shall:

             (x) accept for exchange all the Securities validly tendered and not
         withdrawn pursuant to the Registered Exchange Offer and the Private
         Exchange;

             (y) deliver to the Trustee for cancellation all the Initial
         Securities so accepted for exchange; and

             (z) cause the Trustee to authenticate and deliver promptly to each
         Holder of the Initial Securities, Exchange Securities or Private
         Exchange Securities, as the case may be, equal in principal amount to
         the Initial Securities of such Holder so accepted for exchange.

         The Indenture will provide that the Exchange Securities will not be
subject to the transfer restrictions set forth in the Indenture and that all the
Securities will vote and consent together on all matters as one class and that
none of the Securities will have the right to vote or consent as a class
separate from one another on any matter.

         Interest on each Exchange Security and Private Exchange Security issued
pursuant to the Registered Exchange Offer and in the Private Exchange will
accrue from the last interest payment date on which interest was paid on the
Initial Securities surrendered in exchange therefor or, if no interest has been
paid on the Initial Securities, from the date of original issue of the Initial
Securities.

         Each Holder participating in the Registered Exchange Offer shall be
required to represent to the Company that at the time of the consummation of the
Registered Exchange Offer (i) any Exchange Securities received by such Holder
will be acquired in the ordinary course of business, (ii) such Holder will have
no arrangements or understanding with any person to participate in the
distribution of the Securities or the Exchange Securities within the meaning of
the Securities Act, (iii) such Holder is not an "affiliate," as defined in Rule
405 of the Securities Act, of the Company or if it is an affiliate, such Holder
will comply with the registration and prospectus delivery requirements of the
Securities Act to the extent applicable, (iv) if such Holder is not a
broker-dealer, that it is not engaged in, and does not intend to engage in, the
distribution of the Exchange Securities and (v) if such Holder is a
broker-dealer, that it will receive Exchange Securities for its own account in
exchange for Initial Securities that were acquired as a result of market-making
activities or other trading activities and that it will be required to
acknowledge that it will deliver a prospectus in connection with any resale of
such Exchange Securities.

         Notwithstanding any other provisions hereof, the Company will ensure
that (i) any Exchange Offer Registration Statement and any amendment thereto and
any prospectus forming part thereof and any supplement thereto complies in all
material respects with the Securities Act and the rules and regulations

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thereunder, (ii) any Exchange Offer Registration Statement and any amendment
thereto does not, when it becomes effective, contain an untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein not misleading and (iii) any prospectus
forming part of any Exchange Offer Registration Statement, and any supplement to
such prospectus, does not include an untrue statement of a material fact or omit
to state a material fact required to be stated therein or necessary in order to
make the statements therein, in the light of the circumstances under which they
were made, not misleading.

         If following the date hereof there has been announced a change in
Commission policy with respect to exchange offers that in the reasonable opinion
of counsel to the Company raises a substantial question as to whether the
Registered Exchange Offer is permitted by applicable federal law, the Company
will seek a no-action letter or other favorable decision from the Commission
allowing the Company to consummate the Registered Exchange Offer. The Company
will pursue the issuance of such a decision to the Commission staff level. In
connection with the foregoing, the Company will take all such other actions as
may be requested by the Commission or otherwise required in connection with the
issuance of such decision, including without limitation (i) participating in
telephonic conferences with the Commission, (ii) delivering to the Commission
staff an analysis prepared by counsel to the Company setting forth the legal
bases, if any, upon which such counsel has concluded that the Registered
Exchange Offer should be permitted and (iii) diligently pursuing a resolution
(which need not be favorable) by the Commission staff.

         2. Shelf Registration. If, (i) because of any change in law or in
applicable interpretations thereof by the staff of the Commission, the Company
is not permitted to effect a Registered Exchange Offer, as contemplated by
Section 1 hereof, (ii) the Registered Exchange Offer is not consummated by the
220th day after the Closing Date, (iii) the Initial Purchaser so requests with
respect to the Initial Securities (or the Private Exchange Securities) not
eligible to be exchanged for Exchange Securities in the Registered Exchange
Offer and held by it following consummation of the Registered Exchange Offer or
(iv) any Holder (other than an Exchanging Dealer) is not eligible to participate
in the Registered Exchange Offer or, in the case of any Holder (other than an
Exchanging Dealer) that participates in the Registered Exchange Offer, such
Holder does not receive freely tradeable Exchange Securities on the date of the
exchange and any such Holder so requests, the Company shall take the following
actions (the date on which any of the conditions described in the foregoing
clauses (i) through (iv) occur, including in the case of clauses (iii) or (iv)
the receipt of the required notice, being a "Trigger Date"):

             (a) The Company shall promptly (but in no event more than 45 days
         after the Trigger Date (such 45th day being a "Filing Deadline")) file
         with the Commission and thereafter use its best efforts to cause to be
         declared effective ((1) in the case of clause (i) above, no later than
         180 days after the Closing Date and (2) in the case of clause (ii),
         (iii) or (iv) above, no later than 80 days after the Trigger Date (such
         180th day or 80th day, as applicable being an "Effectiveness
         Deadline")) a registration statement (the "Shelf Registration
         Statement" and, together with the Exchange Offer Registration
         Statement, a "Registration Statement") on an appropriate form under the
         Securities Act relating to the offer and sale of the Transfer
         Restricted Securities by the Holders thereof from time to time in
         accordance with the methods of distribution set forth in the Shelf
         Registration Statement and Rule 415 under the Securities Act
         (hereinafter, the "Shelf Registration"); provided however, that no
         Holder (other than the Initial Purchaser) shall be entitled to have the
         Securities held by it covered by such Shelf Registration Statement
         unless such Holder agrees in writing to be bound by all the provisions
         of this Agreement applicable to such Holder.

             (b) The Company shall use its best efforts to keep the Shelf
         Registration Statement continuously effective in order to permit the
         prospectus included therein to be lawfully delivered by the Holders of
         the relevant Securities, for a period of two years (or for such longer
         period if extended pursuant to Section 3(j) below) from the date of its
         effectiveness or such shorter period that will terminate when all the
         Securities covered by the Shelf Registration Statement (i) have been
         sold

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         pursuant thereto or (ii) can be sold pursuant to Rule 144 under the
         Securities Act without any limitations under clauses (c), (e), (f) and
         (h) of Rule 144. The Company shall be deemed not to have used its best
         efforts to keep the Shelf Registration Statement effective during the
         requisite period if it voluntarily takes any action that would result
         in Holders of Securities covered thereby not being able to offer and
         sell such Securities during that period, unless such action is required
         by applicable law.

             (c) Notwithstanding any other provisions of this Agreement to the
         contrary, the Company shall cause the Shelf Registration Statement and
         the related prospectus and any amendment or supplement thereto, as of
         the effective date of the Shelf Registration Statement, amendment or
         supplement, (i) to comply in all material respects with the applicable
         requirements of the Securities Act and the rules and regulations of the
         Commission and (ii) not to contain any untrue statement of a material
         fact or omit to state a material fact required to be stated therein or
         necessary in order to make the statements therein, in light of the
         circumstances under which they were made, not misleading.

         3. Registration Procedures. In connection with any Shelf Registration
contemplated by Section 2 hereof and, to the extent applicable, any Registered
Exchange Offer contemplated by Section 1 hereof, the following provisions shall
apply:

             (a) The Company shall (i) furnish to the Initial Purchaser, prior
         to the filing thereof with the Commission, a copy of the Registration
         Statement and each amendment thereof and each supplement, if any, to
         the prospectus included therein and, in the event that the Initial
         Purchaser (with respect to any portion of an unsold allotment from the
         original offering) is participating in the Registered Exchange Offer or
         the Shelf Registration Statement, the Company shall use its best
         efforts to reflect in each such document, when so filed with the
         Commission, such comments as the Initial Purchaser reasonably may
         propose; (ii) include the information set forth in Annex A hereto on
         the cover, in Annex B hereto in the "Exchange Offer Procedures" section
         and the "Purpose of the Exchange Offer" section and in Annex C hereto
         in the "Plan of Distribution" section of the prospectus forming a part
         of the Exchange Offer Registration Statement and include the
         information set forth in Annex D hereto in the Letter of Transmittal
         delivered pursuant to the Registered Exchange Offer; (iii) if requested
         by the Initial Purchaser, include the information required by Items 507
         or 508 of Regulation S-K under the Securities Act, as applicable, in
         the prospectus forming a part of the Exchange Offer Registration
         Statement; (iv) include within the prospectus contained in the Exchange
         Offer Registration Statement a section entitled "Plan of Distribution,"
         reasonably acceptable to the Initial Purchaser, which shall contain a
         summary statement of the positions taken or policies made by the staff
         of the Commission with respect to the potential "underwriter" status of
         any broker-dealer that is the beneficial owner (as defined in Rule
         13d-3 under the Securities Exchange Act of 1934, as amended (the
         "Exchange Act")) of Exchange Securities received by such broker-dealer
         in the Registered Exchange Offer (a "Participating Broker-Dealer"),
         whether such positions or policies have been publicly disseminated by
         the staff of the Commission or such positions or policies, in the
         reasonable judgment of the Initial Purchaser based upon advice of
         counsel (which may be in-house counsel), represent the prevailing views
         of the staff of the Commission; and (v) in the case of a Shelf
         Registration Statement, include the names of the Holders who propose to
         sell Securities pursuant to the Shelf Registration Statement as selling
         securityholders.

             (b) The Company shall give written notice to the Initial Purchaser,
         the Holders of the Securities and any Participating Broker-Dealer from
         whom the Company has received prior written notice that it will be a
         Participating Broker-Dealer in the Registered Exchange Offer (which
         notice pursuant to clauses (ii)-(v) hereof shall be accompanied by an
         instruction to suspend the use of the prospectus until the requisite
         changes have been made):

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                   (i)  when the Registration Statement or any amendment thereto
             has been filed with the Commission and when the Registration
             Statement or any post-effective amendment thereto has become
             effective;

                   (ii) of any request by the Commission for amendments or
             supplements to the Registration Statement or the prospectus
             included therein or for additional information;

                  (iii) of the issuance by the Commission of any stop order
             suspending the effectiveness of the Registration Statement or the
             initiation of any proceedings for that purpose;

                   (iv) of the receipt by the Company or its legal counsel of
             any notification with respect to the suspension of the
             qualification of the Securities for sale in any jurisdiction or the
             initiation or threatening of any proceeding for such purpose; and

                   (v)  of the happening of any event that requires the Company
             to make changes in the Registration Statement or the prospectus in
             order that the Registration Statement or the prospectus do not
             contain an untrue statement of a material fact nor omit to state a
             material fact required to be stated therein or necessary to make
             the statements therein (in the case of the prospectus, in light of
             the circumstances under which they were made) not misleading.

             (c) The Company shall make every reasonable effort to obtain the
         withdrawal at the earliest possible time of any order suspending the
         effectiveness of the Registration Statement.

             (d) The Company shall furnish to each Holder of Securities included
         within the coverage of the Shelf Registration, without charge, at least
         one copy of the Shelf Registration Statement and any post-effective
         amendment thereto, including financial statements and schedules, and,
         if the Holder so requests in writing, all exhibits thereto (including
         those, if any, incorporated by reference).

             (e) The Company shall deliver to each Exchanging Dealer and the
         Initial Purchaser, and to any other Holder who so requests, without
         charge, at least one copy of the Exchange Offer Registration Statement
         and any post-effective amendment thereto, including financial
         statements and schedules, and, if the Initial Purchaser or any such
         Holder requests, all exhibits thereto (including those incorporated by
         reference).

             (f) The Company shall, during the Shelf Registration Period,
         deliver to each Holder of Securities included within the coverage of
         the Shelf Registration, without charge, as many copies of the
         prospectus (including each preliminary prospectus) included in the
         Shelf Registration Statement and any amendment or supplement thereto as
         such person may reasonably request. The Company consents, subject to
         the provisions of this Agreement, to the use of the prospectus or any
         amendment or supplement thereto by each of the selling Holders of the
         Securities in connection with the offering and sale of the Securities
         covered by the prospectus, or any amendment or supplement thereto,
         included in the Shelf Registration Statement.

             (g) The Company shall deliver to the Initial Purchaser, any
         Exchanging Dealer, any Participating Broker-Dealer and such other
         persons required to deliver a prospectus following the Registered
         Exchange Offer, without charge, as many copies of the final prospectus
         included in the Exchange Offer Registration Statement and any amendment
         or supplement thereto as such persons may reasonably request. The
         Company consents, subject to the provisions of this Agreement, to the
         use of the prospectus or any amendment or supplement thereto by the
         Initial Purchaser, if necessary, any Participating Broker-Dealer and
         such other persons required to deliver a prospectus following the
         Registered Exchange Offer in connection with the offering and sale of
         the Exchange Securities

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         covered by the prospectus, or any amendment or supplement thereto,
         included in such Exchange Offer Registration Statement.

             (h) Prior to any public offering of the Securities pursuant to any
         Registration Statement the Company shall register or qualify or
         cooperate with the Holders of the Securities included therein and their
         respective counsel in connection with the registration or qualification
         of the Securities for offer and sale under the securities or "blue sky"
         laws of such states of the United States as any Holder of the
         Securities reasonably requests in writing and do any and all other acts
         or things necessary or advisable to enable the offer and sale in such
         jurisdictions of the Securities covered by such Registration Statement;
         provided, however, that the Company shall not be required to (i)
         qualify generally to do business in any jurisdiction where it is not
         then so qualified or (ii) take any action which would subject it to
         general service of process or to taxation in any jurisdiction where it
         is not then so subject.

             (i) The Company shall cooperate with the Holders of the Securities
         to facilitate the timely preparation and delivery of certificates
         representing the Securities to be sold pursuant to any Registration
         Statement free of any restrictive legends and in such denominations and
         registered in such names as the Holders may request a reasonable period
         of time prior to sales of the Securities pursuant to such Registration
         Statement.

             (j) Upon the occurrence of any event contemplated by paragraphs
         (ii) through (v) of Section 3(b) above during the period for which the
         Company is required to maintain an effective Registration Statement,
         the Company shall promptly prepare and file a post-effective amendment
         to the Registration Statement or a supplement to the related prospectus
         and any other required document so that, as thereafter delivered to
         Holders of the Securities or purchasers of Securities, the prospectus
         will not contain an untrue statement of a material fact or omit to
         state any material fact required to be stated therein or necessary to
         make the statements therein, in light of the circumstances under which
         they were made, not misleading. If the Company notifies the Initial
         Purchaser, the Holders of the Securities and any known Participating
         Broker-Dealer in accordance with paragraphs (ii) through (v) of Section
         3(b) above to suspend the use of the prospectus until the requisite
         changes to the prospectus have been made, then the Initial Purchaser,
         the Holders of the Securities and any such Participating Broker-Dealers
         shall suspend use of such prospectus, and the period of effectiveness
         of the Shelf Registration Statement provided for in Section 2(b) above
         and the Exchange Offer Registration Statement provided for in Section 1
         above shall each be extended by the number of days from and including
         the date of the giving of such notice to and including the date when
         the Initial Purchaser, the Holders of the Securities and any known
         Participating Broker-Dealer shall have received such amended or
         supplemented prospectus pursuant to this Section 3(j).

             (k) Not later than the effective date of the applicable
         Registration Statement, the Company will provide a CUSIP number for the
         Initial Securities, the Exchange Securities or the Private Exchange
         Securities, as the case may be, and provide the applicable trustee with
         printed certificates for the Initial Securities, the Exchange
         Securities or the Private Exchange Securities, as the case may be, in a
         form eligible for deposit with The Depository Trust Company.

             (l) The Company will comply with all rules and regulations of the
         Commission to the extent and so long as they are applicable to the
         Registered Exchange Offer or the Shelf Registration and will make
         generally available to its security holders (or otherwise provide in
         accordance with Section 11(a) of the Securities Act) an earnings
         statement satisfying the provisions of Section 11(a) of the Securities
         Act, no later than 45 days after the end of a 12-month period (or 90
         days, if such period is a fiscal year) beginning with the first month
         of the Company's first fiscal quarter commencing after the effective
         date of the Registration Statement, which statement shall cover such
         12-month period.

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             (m) The Company shall cause the Indenture to be qualified under the
         Trust Indenture Act of 1939, as amended, in a timely manner and
         containing such changes, if any, as shall be necessary for such
         qualification. In the event that such qualification would require the
         appointment of a new trustee under the Indenture, the Company shall
         appoint a new trustee thereunder pursuant to the applicable provisions
         of the Indenture.

             (n) The Company may require each Holder of Securities to be sold
         pursuant to the Shelf Registration Statement to furnish to the Company
         such information regarding the Holder and the distribution of the
         Securities as the Company may from time to time reasonably require for
         inclusion in the Shelf Registration Statement, and the Company may
         exclude from such registration the Securities of any Holder that
         unreasonably fails to furnish such information within a reasonable time
         after receiving such request.

             (o) The Company shall enter into such customary agreements
         (including, if requested, an underwriting agreement in customary form)
         and take all such other action, if any, as any Holder of the Securities
         shall reasonably request in order to facilitate the disposition of the
         Securities pursuant to any Shelf Registration.

             (p) In the case of any Shelf Registration, the Company shall (i)
         make reasonably available for inspection by the Holders of the
         Securities, any underwriter participating in any disposition pursuant
         to the Shelf Registration Statement and any attorney, accountant or
         other agent retained by the Holders of the Securities or any such
         underwriter all relevant financial and other records, pertinent
         corporate documents and properties of the Company and (ii) cause the
         Company's officers, directors, employees, accountants and auditors to
         supply all relevant information reasonably requested by the Holders of
         the Securities or any such underwriter, attorney, accountant or agent
         in connection with the Shelf Registration Statement, in each case, as
         shall be reasonably necessary to enable such persons to conduct a
         reasonable investigation within the meaning of Section 11 of the
         Securities Act; provided, however, that the foregoing inspection and
         information gathering shall be coordinated by you and, on behalf of the
         other parties, by one counsel designated by and on behalf of such other
         parties as described in Section 4 hereof.

             (q) In the case of any Shelf Registration, the Company, if
         requested by any Holder of Securities covered thereby, shall cause (i)
         its counsel to deliver an opinion and updates thereof relating to the
         Securities in customary form addressed to such Holders and the managing
         underwriters, if any, thereof and dated, in the case of the initial
         opinion, the effective date of such Shelf Registration Statement (it
         being agreed that the matters to be covered by such opinion shall
         include, without limitation, the due incorporation and good standing of
         the Company and its subsidiaries; the qualification of the Company and
         its subsidiaries to transact business as foreign corporations; the due
         authorization, execution and delivery of the relevant agreement of the
         type referred to in Section 3(o) hereof; the due authorization,
         execution, authentication and issuance, and the validity and
         enforceability, of the applicable Securities; the absence of material
         legal or governmental proceedings involving the Company and its
         subsidiaries; the absence of governmental approvals required to be
         obtained in connection with the Shelf Registration Statement, the
         offering and sale of the applicable Securities, or any agreement of the
         type referred to in Section 3(o) hereof; the compliance as to form of
         such Shelf Registration Statement and any documents incorporated by
         reference therein and of the Indenture with the requirements of the
         Securities Act and the Trust Indenture Act, respectively; and, as of
         the date of the opinion and as of the effective date of the Shelf
         Registration Statement or most recent post-effective amendment thereto,
         as the case may be, the absence from such Shelf Registration Statement
         and the prospectus included therein, as then amended or supplemented,
         and from any documents incorporated by reference therein of an untrue
         statement of a material fact or the omission to state therein a
         material fact required to be stated therein or necessary to make the
         statements therein not misleading (in the case of any such documents,
         in the light of the circumstances existing at the

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         time that such documents were filed with the Commission under the
         Exchange Act); (ii) its officers to execute and deliver all customary
         documents and certificates and updates thereof requested by any
         underwriters of the applicable Securities and (iii) its independent
         public accountants to provide to the selling Holders of the applicable
         Securities and any underwriter therefor a comfort letter in customary
         form and covering matters of the type customarily covered in comfort
         letters in connection with primary underwritten offerings, subject to
         receipt of appropriate documentation as contemplated, and only if
         permitted, by Statement of Auditing Standards No. 72.

             (r) In the case of the Registered Exchange Offer, if requested by
         the Initial Purchaser or any known Participating Broker-Dealer, the
         Company shall cause (i) its counsel to deliver to the Initial Purchaser
         or such Participating Broker-Dealer a signed opinion in the form set
         forth in Section 6(c) of the Purchase Agreement with such changes as
         are customary in connection with the preparation of a Registration
         Statement and (ii) its independent public accountants to deliver to the
         Initial Purchaser or such Participating Broker-Dealer a comfort letter,
         in customary form, meeting the requirements as to the substance thereof
         as set forth in Section 6(a) of the Purchase Agreement, with
         appropriate date changes.

             (s) If a Registered Exchange Offer or a Private Exchange is to be
         consummated, upon delivery of the Initial Securities by Holders to the
         Company (or to such other Person as directed by the Company) in
         exchange for the Exchange Securities or the Private Exchange
         Securities, as the case may be, the Company shall mark, or caused to be
         marked, on the Initial Securities so exchanged that such Initial
         Securities are being canceled in exchange for the Exchange Securities
         or the Private Exchange Securities, as the case may be; in no event
         shall the Initial Securities be marked as paid or otherwise satisfied.

             (t) The Company will use its best efforts to (a) if the Initial
         Securities have been rated prior to the initial sale of such Initial
         Securities, confirm such ratings will apply to the Securities covered
         by a Registration Statement, or (b) if the Initial Securities were not
         previously rated, cause the Securities covered by a Registration
         Statement to be rated with the appropriate rating agencies, if so
         requested by Holders of a majority in aggregate principal amount of
         Securities covered by such Registration Statement, or by the managing
         underwriters, if any.

             (u) In the event that any broker-dealer registered under the
         Exchange Act shall underwrite any Securities or participate as a member
         of an underwriting syndicate or selling group or "assist in the
         distribution" (within the meaning of the Conduct Rules (the "Rules") of
         the National Association of Securities Dealers, Inc. ("NASD")) thereof,
         whether as a Holder of such Securities or as an underwriter, a
         placement or sales agent or a broker or dealer in respect thereof, or
         otherwise, the Company will assist such broker-dealer in complying with
         the requirements of such Rules, including, without limitation, by (i)
         if such Rules, including Rule 2720, shall so require, engaging a
         "qualified independent underwriter" (as defined in Rule 2720) to
         participate in the preparation of the Registration Statement relating
         to such Securities, to exercise usual standards of due diligence in
         respect thereto and, if any portion of the offering contemplated by
         such Registration Statement is an underwritten offering or is made
         through a placement or sales agent, to recommend the yield of such
         Securities, (ii) indemnifying any such qualified independent
         underwriter to the extent of the indemnification of underwriters
         provided in Section 5 hereof and (iii) providing such information to
         such broker-dealer as may be required in order for such broker-dealer
         to comply with the requirements of the Rules.

(v)      The Company shall use its best efforts to take all other steps
         necessary to effect the registration of the Securities covered by a
         Registration Statement contemplated hereby.

                                       9

<PAGE>

         4. Registration Expenses. (a) All expenses incident to the Company's
performance of and compliance with this Agreement will be borne by the Company,
regardless of whether a Registration Statement is ever filed or becomes
effective, including without limitation;

                   (i)  all registration and filing fees and expenses;

                   (ii) all fees and expenses of compliance with federal
             securities and state "blue sky" or securities laws;

                  (iii) all expenses of printing (including printing
             certificates for the Securities to be issued in the Registered
             Exchange Offer and the Private Exchange and printing of
             Prospectuses), messenger and delivery services and telephone;

                   (iv) all fees and disbursements of counsel for the Company;

                   (v)  all application and filing fees in connection with
             listing the Exchange Securities on a national securities exchange
             or automated quotation system pursuant to the requirements hereof;
             and

                   (vi) all fees and disbursements of independent certified
             public accountants of the Company (including the expenses of any
             special audit and comfort letters required by or incident to such
             performance).

The Company will bear its internal expenses (including, without limitation, all
salaries and expenses of its officers and employees performing legal or
accounting duties), the expenses of any annual audit and the fees and expenses
of any person, including special experts, retained by the Company.

             (b) In connection with any Registration Statement required by this
         Agreement, the Company will reimburse the Initial Purchaser and the
         Holders of Transfer Restricted Securities who are tendering Initial
         Securities in the Registered Exchange Offer and/or selling or reselling
         Securities pursuant to the "Plan of Distribution" contained in the
         Exchange Offer Registration Statement or the Shelf Registration
         Statement, as applicable, for the reasonable fees and disbursements of
         not more than one counsel, who shall be Cravath, Swaine & Moore unless
         another firm shall be chosen by the Holders of a majority in principal
         amount of the Transfer Restricted Securities for whose benefit such
         Registration Statement is being prepared.

         5. Indemnification. (a) The Company agrees to indemnify and hold
harmless each Holder of the Securities, any Participating Broker-Dealer and each
person, if any, who controls such Holder or such Participating Broker-Dealer
within the meaning of the Securities Act or the Exchange Act (each Holder, any
Participating Broker-Dealer and such controlling persons are referred to
collectively as the "Indemnified Parties") from and against any losses, claims,
damages or liabilities, joint or several, or any actions in respect thereof
(including, but not limited to, any losses, claims, damages, liabilities or
actions relating to purchases and sales of the Securities) to which each
Indemnified Party may become subject under the Securities Act, the Exchange Act
or otherwise, insofar as such losses, claims, damages, liabilities or actions
arise out of or are based upon any untrue statement or alleged untrue statement
of a material fact contained in a Registration Statement or prospectus or in any
amendment or supplement thereto or in any preliminary prospectus relating to a
Shelf Registration, or arise out of, or are based upon, the omission

                                       10

<PAGE>

or alleged omission to state therein a material fact required to be stated
therein or necessary to make the statements therein not misleading, and shall
reimburse, as incurred, the Indemnified Parties for any legal or other expenses
reasonably incurred by them in connection with investigating or defending any
such loss, claim, damage, liability or action in respect thereof; provided,
however, that (i) the Company shall not be liable in any such case to the extent
that such loss, claim, damage or liability arises out of or is based upon any
untrue statement or alleged untrue statement or omission or alleged omission
made in a Registration Statement or prospectus or in any amendment or supplement
thereto or in any preliminary prospectus relating to a Shelf Registration in
reliance upon and in conformity with written information pertaining to such
Holder and furnished to the Company by or on behalf of such Holder specifically
for inclusion therein and (ii) with respect to any untrue statement or omission
or alleged untrue statement or omission made in any preliminary prospectus
relating to a Shelf Registration Statement, the indemnity agreement contained in
this subsection (a) shall not inure to the benefit of any Holder or
Participating Broker-Dealer from whom the person asserting any such losses,
claims, damages or liabilities purchased the Securities concerned, to the extent
that a prospectus relating to such Securities was required to be delivered by
such Holder or Participating Broker-Dealer under the Securities Act in
connection with such purchase and any such loss, claim, damage or liability of
such Holder or Participating Broker-Dealer results from the fact that there was
not sent or given to such person, at or prior to the written confirmation of the
sale of such Securities to such person, a copy of the final prospectus if the
Company had previously furnished copies thereof to such Holder or Participating
Broker-Dealer; provided further, however, that this indemnity agreement will be
in addition to any liability which the Company may otherwise have to such
Indemnified Party. The Company shall also indemnify underwriters, their officers
and directors and each person who controls such underwriters within the meaning
of the Securities Act or the Exchange Act to the same extent as provided above
with respect to the indemnification of the Holders of the Securities if
requested by such Holders.

             (b) Each Holder of the Securities, severally and not jointly, will
         indemnify and hold harmless the Company and each person, if any, who
         controls the Company within the meaning of the Securities Act or the
         Exchange Act from and against any losses, claims, damages or
         liabilities or any actions in respect thereof, to which the Company or
         any such controlling person may become subject under the Securities
         Act, the Exchange Act or otherwise, insofar as such losses, claims,
         damages, liabilities or actions arise out of or are based upon any
         untrue statement or alleged untrue statement of a material fact
         contained in a Registration Statement or prospectus or in any amendment
         or supplement thereto or in any preliminary prospectus relating to a
         Shelf Registration, or arise out of or are based upon the omission or
         alleged omission to state therein a material fact necessary to make the
         statements therein not misleading, but in each case only to the extent
         that the untrue statement or omission or alleged untrue statement or
         omission was made in reliance upon and in conformity with written
         information pertaining to such Holder and furnished to the Company by
         or on behalf of such Holder specifically for inclusion therein; and,
         subject to the limitation set forth immediately preceding this clause,
         shall reimburse, as incurred, the Company for any legal or other
         expenses reasonably incurred by the Company or any such controlling
         person in connection with investigating or defending any loss, claim,
         damage, liability or action in respect thereof. This indemnity
         agreement will be in addition to any liability which such Holder may
         otherwise have to the Company or any of its controlling persons.

             (c) Promptly after receipt by an indemnified party under this
         Section 5 of notice of the commencement of any action or proceeding
         (including a governmental investigation), such indemnified party will,
         if a claim in respect thereof is to be made against the indemnifying
         party under this Section 5, notify the indemnifying party of the
         commencement thereof; but the failure to notify the indemnifying party
         will not relieve the indemnifying party from any liability which it may
         have under this Section 5 except to the extent that it has been
         materially prejudiced (the forfeiture of substantive rights or
         defenses) by such failure; and provided further that the failure to
         notify the indemnifying party shall not relieve it from any liability
         that it may have to any indemnified party other than the
         indemnification obligation provided in paragraph (a) or (b) above. In
         case any such action is brought against any indemnified party, and it
         notifies the indemnifying party of the commencement thereof, the
         indemnifying party will be entitled to participate therein and, to the
         extent that it may wish, jointly with any other indemnifying party
         similarly notified, to assume the defense thereof, with counsel
         reasonably satisfactory to such indemnified party (who shall not,
         except with the consent of the indemnified party, be counsel to the
         indemnifying party), and after notice from the indemnifying party to
         such indemnified party of its election so to assume the defense thereof
         the

                                       11

<PAGE>

         indemnifying party will not be liable to such indemnified party under
         this Section 5 for any legal or other expenses, other than reasonable
         costs of investigation, subsequently incurred by such indemnified party
         in connection with the defense thereof. No indemnifying party shall,
         without the prior written consent of the indemnified party, effect any
         settlement of any pending or threatened action in respect of which any
         indemnified party is or could have been a party and indemnity could
         have been sought hereunder by such indemnified party unless such
         settlement includes an unconditional release of such indemnified party
         from all liability on any claims that are the subject matter of such
         action, and does not include a statement as to or an admission of
         fault, culpability or a failure to act by or on behalf of any
         indemnified party.

             (d) If the indemnification provided for in this Section 5 is
         unavailable or insufficient to hold harmless an indemnified party under
         subsections (a) or (b) above, then each indemnifying party shall
         contribute to the amount paid or payable by such indemnified party as a
         result of the losses, claims, damages or liabilities (or actions in
         respect thereof) referred to in subsection (a) or (b) above (i) in such
         proportion as is appropriate to reflect the relative benefits received
         by the indemnifying party or parties on the one hand and the
         indemnified party on the other from the exchange of the Securities
         pursuant to the Registered Exchange Offer, or (ii) if the allocation
         provided by the foregoing clause (i) is not permitted by applicable
         law, in such proportion as is appropriate to reflect not only the
         relative benefits referred to in clause (i) above but also the relative
         fault of the indemnifying party or parties on the one hand and the
         indemnified party on the other in connection with the statements or
         omissions that resulted in such losses, claims, damages or liabilities
         (or actions in respect thereof) as well as any other relevant equitable
         considerations. The relative fault of the parties shall be determined
         by reference to, among other things, whether the untrue or alleged
         untrue statement of a material fact or the omission or alleged omission
         to state a material fact relates to information supplied by the Company
         on the one hand or such Holder or such other indemnified party, as the
         case may be, on the other, and the parties' relative intent, knowledge,
         access to information and opportunity to correct or prevent such
         statement or omission. The amount paid by an indemnified party as a
         result of the losses, claims, damages or liabilities referred to in the
         first sentence of this subsection (d) shall be deemed to include any
         legal or other expenses reasonably incurred by such indemnified party
         in connection with investigating or defending any action or claim which
         is the subject of this subsection (d). Notwithstanding any other
         provision of this Section 5(d), the Holders of the Securities shall not
         be required to contribute any amount in excess of the amount by which
         the net proceeds received by such Holders from the sale of the
         Securities pursuant to a Registration Statement exceeds the amount of
         damages which such Holders have otherwise been required to pay by
         reason of such untrue or alleged untrue statement or omission or
         alleged omission. No person guilty of fraudulent misrepresentation
         (within the meaning of Section 11(f) of the Securities Act) shall be
         entitled to contribution from any person who was not guilty of such
         fraudulent misrepresentation. For purposes of this paragraph (d), each
         person, if any, who controls such indemnified party within the meaning
         of the Securities Act or the Exchange Act shall have the same rights to
         contribution as such indemnified party and each person, if any, who
         controls the Company within the meaning of the Securities Act or the
         Exchange Act shall have the same rights to contribution as the Company.

             (e) The agreements contained in this Section 5 shall survive the
         sale of the Securities pursuant to a Registration Statement and shall
         remain in full force and effect, regardless of any termination or
         cancellation of this Agreement or any investigation made by or on
         behalf of any indemnified party.

         6. Additional Interest Under Certain Circumstances. (a) Additional
interest (the "Additional Interest") with respect to the Securities shall be
assessed as follows if any of the following events occur (each such event in
clauses (i) through (iv) below being herein called a "Registration Default"):

                                       12

<PAGE>

                   (i)  any Registration Statement required by this Agreement is
             not filed with the Commission on or prior to the applicable Filing
             Deadline;

                   (ii) any Registration Statement required by this Agreement is
             not declared effective by the Commission on or prior to the
             applicable Effectiveness Deadline;

                  (iii) the Registered Exchange Offer has not been consummated
             on or prior to the Consummation Deadline; or

                   (iv) any Registration Statement required by this Agreement
             has been declared effective by the Commission but (A) such
             Registration Statement thereafter ceases to be effective or (B)
             such Registration Statement or the related prospectus ceases to be
             usable in connection with resales of Transfer Restricted Securities
             during the periods specified herein because either (1) any event
             occurs as a result of which the related prospectus forming part of
             such Registration Statement would include any untrue statement of a
             material fact or omit to state any material fact necessary to make
             the statements therein in the light of the circumstances under
             which they were made not misleading, or (2) it shall be necessary
             to amend such Registration Statement or supplement the related
             prospectus, to comply with the Securities Act or the Exchange Act
             or the respective rules thereunder.

Each of the foregoing will constitute a Registration Default whatever the reason
for any such event and whether it is voluntary or involuntary or is beyond the
control of the Company or pursuant to operation of law or as a result of any
action or inaction by the Commission.

         Additional Interest shall accrue on the Securities over and above the
interest set forth in the title of the Securities from and including the date on
which any such Registration Default shall occur to but excluding the date on
which all such Registration Defaults have been cured, at a rate of 0.50% per
annum (the "Additional Interest Rate") for the first 90-day period immediately
following the occurrence of such Registration Default. The Additional Interest
Rate shall increase by an additional 0.50% per annum with respect to each
subsequent 90-day period until all Registration Defaults have been cured, up to
a maximum Additional Interest Rate of 2.0% per annum.

             (b) A Registration Default referred to in Section 6(a)(iv) hereof
         shall be deemed not to have occurred and be continuing in relation to a
         Shelf Registration Statement or the related prospectus if (i) such
         Registration Default has occurred solely as a result of (x) the filing
         of a post-effective amendment to such Shelf Registration Statement to
         incorporate annual audited financial information with respect to the
         Company where such post-effective amendment is not yet effective and
         needs to be declared effective to permit Holders to use the related
         prospectus or (y) other material events, with respect to the Company
         that would need to be described in such Shelf Registration Statement or
         the related prospectus and (ii) in the case of clause (y), the Company
         is proceeding promptly and in good faith to amend or supplement such
         Shelf Registration Statement and related prospectus to describe such
         events; provided, however, that in any case if such Registration
         Default occurs for a continuous period in excess of 30 days, Additional
         Interest shall be payable in accordance with the above paragraph from
         the day such Registration Default occurs until such Registration
         Default is cured.

             (c) Any amounts of Additional Interest due pursuant to Section 6(a)
         will be payable in cash on the regular interest payment dates with
         respect to the Securities. The amount of Additional Interest will be
         determined by multiplying the applicable Additional Interest Rate by
         the principal amount of the Securities and further multiplied by a
         fraction, the numerator of which is the number of days such Additional
         Interest Rate was applicable during such period (determined on the
         basis of a 360-day year comprised of twelve 30-day months), and the
         denominator of which is 360.

                                       13

<PAGE>

             (d) "Transfer Restricted Securities" means each Security until (i)
         the date on which such Security has been exchanged by a person other
         than a broker-dealer for a freely transferable Exchange Security in the
         Registered Exchange Offer, (ii) following the exchange by a
         broker-dealer in the Registered Exchange Offer of an Initial Security
         for an Exchange Note, the date on which such Exchange Note is sold to a
         purchaser who receives from such broker-dealer on or prior to the date
         of such sale a copy of the prospectus contained in the Exchange Offer
         Registration Statement, (iii) the date on which such Security has been
         effectively registered under the Securities Act and disposed of in
         accordance with the Shelf Registration Statement or (iv) the date on
         which such Security is distributed to the public pursuant to Rule 144
         under the Securities Act or is saleable pursuant to Rule 144(k) under
         the Securities Act.

         7. Rules 144 and 144A. The Company shall use its best efforts to file
the reports required to be filed by it under the Securities Act and the Exchange
Act in a timely manner and, if at any time the Company is not required to file
such reports, it will, upon the request of any Holder of Securities, make
publicly available other information so long as necessary to permit sales of
their securities pursuant to Rules 144 and 144A. The Company covenants that it
will take such further action as any Holder of Securities may reasonably
request, all to the extent required from time to time to enable such Holder to
sell Securities without registration under the Securities Act within the
limitation of the exemptions provided by Rules 144 and 144A (including the
requirements of Rule 144A(d)(4)). The Company will provide a copy of this
Agreement to prospective purchasers of Initial Securities identified to the
Company by the Initial Purchaser upon request. Upon the request of any Holder of
Initial Securities, the Company shall deliver to such Holder a written statement
as to whether it has complied with such requirements. Notwithstanding the
foregoing, nothing in this Section 7 shall be deemed to require the Company to
register any of its securities pursuant to the Exchange Act.

         8. Underwritten Registrations. If any of the Transfer Restricted
Securities covered by any Shelf Registration are to be sold in an underwritten
offering, the investment banker or investment bankers and manager or managers
that will administer the offering ("Managing Underwriters") will be selected by
the Holders of a majority in aggregate principal amount of such Transfer
Restricted Securities to be included in such offering.

         No person may participate in any underwritten registration hereunder
unless such person (i) agrees to sell such person's Transfer Restricted
Securities on the basis reasonably provided in any underwriting arrangements
approved by the persons entitled hereunder to approve such arrangements and (ii)
completes and executes all questionnaires, powers of attorney, indemnities,
underwriting agreements and other documents reasonably required under the terms
of such underwriting arrangements.

         9. Miscellaneous.

             (a) Remedies. The Company acknowledges and agrees that any failure
         by the Company to comply with its obligations under Section 1 and 2
         hereof may result in material irreparable injury to the Initial
         Purchaser or the Holders for which there is no adequate remedy at law,
         that it will not be possible to measure damages for such injuries
         precisely and that, in the event of any such failure, the Initial
         Purchaser or any Holder may obtain such relief as may be required to
         specifically enforce the Company's obligations under Sections 1 and 2
         hereof. The Company further agrees to waive the defense in any action
         for specific performance that a remedy at law would be adequate.

             (b) No Inconsistent Agreements. The Company will not on or after
         the date of this Agreement enter into any agreement with respect to its
         securities that is inconsistent with the rights granted to the Holders
         in this Agreement or otherwise conflicts with the provisions hereof.
         The rights granted to the Holders hereunder do not in any way conflict
         with and are not inconsistent with the rights granted to the holders of
         the Company's securities under any agreement in effect on the date
         hereof.

                                       14

<PAGE>

             (c) Amendments and Waivers. The provisions of this Agreement may
         not be amended, modified or supplemented, and waivers or consents to
         departures from the provisions hereof may not be given, except by the
         Company and the written consent of the Holders of a majority in
         principal amount of the Securities affected by such amendment,
         modification, supplement, waiver or consents.

             (d) Notices. All notices and other communications provided for or
         permitted hereunder shall be made in writing by hand delivery,
         first-class mail, facsimile transmission, or air courier which
         guarantees overnight delivery:

                   (1) if to a Holder of the Securities, at the most current
             address given by such Holder to the Company.

                   (2) if to the Initial Purchaser, to:

                           Credit Suisse First Boston LLC
                           Eleven Madison Avenue
                           New York, NY 10010-3629
                           Fax No.:  (212) 325-8278
                           Attention:  Transactions Advisory Group

                                 with a copy to:

                           Cravath, Swaine & Moore
                           Worldwide Plaza
                           825 Eighth Avenue
                           New York, New York 10019-7475
                           Fax No.:  (212) 474-3700
                           Attention:  Stephen L. Burns, Esq.

                   (3) if to the Company, at its address as follows:

                           Denbury Resources Inc.
                           5100 Tennyson Parkway
                           Suite 3000
                           Plano, Texas  75024
                           Fax No.:  (972) 673-2150
                           Attention:  Phil Rykhoek

                                 with a copy to:

                           Jenkens & Gilchrist, PC
                           1100 Louisiana Street, Suite 1800
                           Houston, TX  77002
                           Fax No.:  (713) 951-3314
                           Attention:  Donald Brodsky, Esq.

         All such notices and communications shall be deemed to have been duly
given: at the time delivered by hand, if personally delivered; three business
days after being deposited in the mail, postage prepaid, if mailed; when receipt
is acknowledged by recipient's facsimile machine operator, if sent by facsimile
transmission; and on the day delivered, if sent by overnight air courier
guaranteeing next day delivery.

                                       15

<PAGE>

             (e) Third Party Beneficiaries. The Holders shall be third party
         beneficiaries to the agreements made hereunder between the Company, on
         the one hand, and the Initial Purchaser, on the other hand, and shall
         have the right to enforce such agreements directly to the extent they
         may deem such enforcement necessary or advisable to protect their
         rights or the rights of Holders hereunder.

             (f) Successors and Assigns. This Agreement shall be binding upon
         the Company and its successors and assigns.

             (g) Counterparts. This Agreement may be executed in any number of
         counterparts and by the parties hereto in separate counterparts, each
         of which when so executed shall be deemed to be an original and all of
         which taken together shall constitute one and the same agreement.

             (h) Headings. The headings in this Agreement are for convenience of
         reference only and shall not limit or otherwise affect the meaning
         hereof.

             (i) Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND
         CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK BUT
         WITHOUT GIVING EFFECT TO APPLICABLE PRINCIPLES OF CONFLICTS OF LAW TO
         THE EXTENT THAT THE APPLICATION OF THE LAWS OF ANOTHER JURISDICTION
         WOULD BE REQUIRED THEREBY.

             (j) Severability. If any one or more of the provisions contained
         herein, or the application thereof in any circumstance, is held
         invalid, illegal or unenforceable, the validity, legality and
         enforceability of any such provision in every other respect and of the
         remaining provisions contained herein shall not be affected or impaired
         thereby.

             (k) Securities Held by the Company. Whenever the consent or
         approval of Holders of a specified percentage of principal amount of
         Securities is required hereunder, Securities held by the Company or its
         affiliates (other than subsequent Holders of Securities if such
         subsequent Holders are deemed to be affiliates solely by reason of
         their holdings of such Securities) shall not be counted in determining
         whether such consent or approval was given by the Holders of such
         required percentage.

             (l) Each of the Issuer and the Guarantors hereby submits to the
         non-exclusive jurisdiction of the Federal and state courts in the
         Borough of Manhattan in The City of New York in any suit or proceeding
         arising out of or relating to this Agreement or the transactions
         contemplated hereby.

                                       16

<PAGE>

         If the foregoing is in accordance with your understanding of our
agreement, please sign and return to the Issuer a counterpart hereof, whereupon
this instrument, along with all counterparts, will become a binding agreement
among the Initial Purchaser, the Issuer and the Guarantors in accordance with
its terms.

                                    Very truly yours,

                                    DENBURY RESOURCES INC.

                                    By

                                       ----------------------------------------
                                       Name:
                                       Title:

                                    DENBURY ENERGY SERVICES, INC.

                                    By

                                       ----------------------------------------
                                       Name:
                                       Title:

                                    DENBURY MARINE, L.L.C.

                                    By

                                       ----------------------------------------
                                       Name:
                                       Title:

                                    DENBURY OFFSHORE, INC.

                                    By

                                       ----------------------------------------
                                       Name:
                                       Title:

                                    DENBURY GATHERING & MARKETING, INC.

                                    By

                                       ----------------------------------------
                                       Name:
                                       Title:

                                       17

<PAGE>

The foregoing Registration Rights Agreement is hereby confirmed and accepted as
of the date first above written.

CREDIT SUISSE FIRST BOSTON LLC

     by
         -------------------------------------------------
         Name:
         Title:

                                       18

<PAGE>

                                                                        ANNEX A

Each broker-dealer that receives Exchange Securities for its own account
pursuant to the Exchange Offer must acknowledge that it will deliver a
prospectus in connection with any resale of such Exchange Securities. The Letter
of Transmittal states that by so acknowledging and by delivering a prospectus, a
broker-dealer will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act. This Prospectus, as it may be amended or
supplemented from time to time, may be used by a broker-dealer in connection
with resales of Exchange Securities received in exchange for Initial Securities
where such Initial Securities were acquired by such broker-dealer as a result of
market-making activities or other trading activities. The Company has agreed
that, for a period of 180 days after the Expiration Date (as defined herein), it
will make this Prospectus available to any broker-dealer for use in connection
with any such resale. See "Plan of Distribution."

                                       19

<PAGE>

                                                                        ANNEX B

Each broker-dealer that receives Exchange Securities for its own account in
exchange for Initial Securities, where such Initial Securities were acquired by
such broker-dealer as a result of market-making activities or other trading
activities, must acknowledge that it will deliver a prospectus in connection
with any resale of such Exchange Securities. See "Plan of Distribution."

                                       20

<PAGE>

                                                                        ANNEX C

                              PLAN OF DISTRIBUTION

Each broker-dealer that receives Exchange Securities for its own account
pursuant to the Exchange Offer must acknowledge that it will deliver a
prospectus in connection with any resale of such Exchange Securities. This
Prospectus, as it may be amended or supplemented from time to time, may be used
by a broker-dealer in connection with resales of Exchange Securities received in
exchange for Initial Securities where such Initial Securities were acquired as a
result of market-making activities or other trading activities. The Company has
agreed that, for a period of 180 days after the Expiration Date, it will make
this prospectus, as amended or supplemented, available to any broker-dealer for
use in connection with any such resale. In addition, until , 2003, all dealers
effecting transactions in the Exchange Securities may be required to deliver a
prospectus.1

The Company will not receive any proceeds from any sale of Exchange Securities
by broker-dealers. Exchange Securities received by broker-dealers for their own
account pursuant to the Exchange Offer may be sold from time to time in one or
more transactions in the over-the-counter market, in negotiated transactions,
through the writing of options on the Exchange Securities or a combination of
such methods of resale, at market prices prevailing at the time of resale, at
prices related to such prevailing market prices or negotiated prices. Any such
resale may be made directly to purchasers or to or through brokers or dealers
who may receive compensation in the form of commissions or concessions from any
such broker-dealer or the purchasers of any such Exchange Securities. Any
broker-dealer that resells Exchange Securities that were received by it for its
own account pursuant to the Exchange Offer and any broker or dealer that
participates in a distribution of such Exchange Securities may be deemed to be
an "underwriter" within the meaning of the Securities Act and any profit on any
such resale of Exchange Securities and any commission or concessions received by
any such persons may be deemed to be underwriting compensation under the
Securities Act. The Letter of Transmittal states that, by acknowledging that it
will deliver and by delivering a prospectus, a broker-dealer will not be deemed
to admit that it is an "underwriter" within the meaning of the Securities Act.

For a period of 180 days after the Expiration Date the Company will promptly
send additional copies of this Prospectus and any amendment or supplement to
this Prospectus to any broker-dealer that requests such documents in the Letter
of Transmittal. The Company has agreed to pay all expenses incident to the
Exchange Offer (including the expenses of one counsel for the Holders of the
Securities) other than commissions or concessions of any brokers or dealers and
will indemnify the Holders of the Securities (including any broker-dealers)
against certain liabilities, including liabilities under the Securities Act.

--------
         1 In addition, the legend required by Item 502(e) of Regulation S-K
will appear on the back cover page of the Exchange Offer prospectus.

                                       21
<PAGE>

                                                                        ANNEX D

[ ] CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS THERETO.

         Name:
                  --------------------------------------------

         Address:
                  --------------------------------------------

If the undersigned is not a broker-dealer, the undersigned represents that it is
not engaged in, and does not intend to engage in, a distribution of Exchange
Securities. If the undersigned is a broker-dealer that will receive Exchange
Securities for its own account in exchange for Initial Securities that were
acquired as a result of market-making activities or other trading activities, it
acknowledges that it will deliver a prospectus in connection with any resale of
such Exchange Securities; however, by so acknowledging and by delivering a
prospectus, the undersigned will not be deemed to admit that it is an
"underwriter" within the meaning of the Securities Act.

                                       22<PAGE>

                                                                   EXHIBIT 4.1

--------------------------------------------------------------------------------
                             PARKER DRILLING COMPANY

                            and Subsidiary Guarantors

                          10 1/8% SENIOR NOTES DUE 2009
                                 ---------------

                          FIRST SUPPLEMENTAL INDENTURE

                      Dated and effective as of May 2, 2002

               Supplementing the Indenture dated as of May 2, 2002
                                 ---------------

                              JPMORGAN CHASE BANK,

                                   as Trustee
--------------------------------------------------------------------------------

                                       31
<PAGE>
                          FIRST SUPPLEMENTAL INDENTURE

      This First Supplemental Indenture dated and effective as of May 2, 2002
(the "First Supplemental Indenture") is made and entered into by and among
Parker Drilling Company, a Delaware corporation (the "Company"), each of the
parties identified under the caption "Subsidiary Guarantors" on the signature
pages hereof (the "Subsidiary Guarantors"), Parker Drilling Company of Colombia
Limited, a Nevada corporation, and International Equipment Leasing Company, a
Nevada corporation, which are wholly owned subsidiaries of the Company (the "New
Guarantors") and JPMorgan Chase Bank, a New York banking organization, as
Trustee (the "Trustee").

                                    RECITALS:

      WHEREAS, the Company, the Subsidiary Guarantors and the Trustee have
executed and delivered an Indenture dated as of May 2, 2002, by and among the
Company, the Subsidiary Guarantors and the Trustee (the "2002 Indenture") for
the benefit of one another and for the ratable benefit of the Holders of the 10
1/8% Senior Notes due 2009, (the "Notes") and pursuant to which the Subsidiary
Guarantors have agreed, jointly and severally, to unconditionally guarantee the
due and punctual payment of the principal of, premium, if any, and interest on
the Notes and all other amounts due and payable under the 2002 Indenture and the
Notes by the Company; and

      WHEREAS, Section 9.01(a)(vi) of the 2002 Indenture provides that under
certain conditions the Company, the Subsidiary Guarantors and the Trustee may,
without the consent of any Holder of a note, amend or supplement the 2002
Indenture to add any Restricted Subsidiary as an additional Subsidiary Guarantor
as provided in Section 10.02 of the 2002 Indenture; and

      WHEREAS, the Company has determined that the New Guarantors are required
to be added as Subsidiary Guarantors pursuant to Section 10.02 of the 2002
Indenture; and

      WHEREAS, Section 10.02 of the 2002 Indenture provides that the following
is required: (i) the execution and delivery by the New Guarantors of this First
Supplemental Indenture whereby the New Guarantors agree to be bound by the terms
of the 2002 Indenture as applicable to a Subsidiary Guarantor; and (ii) the
execution by the New Guarantors of a Subsidiary Guarantee in the form prescribed
by the 2002 Indenture; and

      WHEREAS, the execution and delivery of this First Supplemental Indenture
has been authorized by resolution of the board of directors of the Company and
the Subsidiary Guarantors and the board of directors of each of the New
Guarantors has authorized this First Supplemental Indenture and the execution of
a Subsidiary Guarantee;

      WHEREAS, all conditions and requirements necessary to make this First
Supplemental Indenture valid and binding upon the Company, the Subsidiary
Guarantors and New Guarantors, and enforceable against the New Guarantors in
accordance with its terms, have been performed and fulfilled;

      NOW, THEREFORE, in consideration of the above premises, the parties hereto
mutually covenant and agree for the equal and ratable benefit of the respective
Holders of the Notes, as follows:

      SECTION 1. Certain Terms Defined in the 2002 Indenture. All capitalized
terms used and not otherwise defined herein shall have the meanings ascribed to
them in the 2002 Indenture.

      SECTION 2.  Additional Guarantors; Subsidiary Guarantee.

            Section 2.1. The New Guarantors, by execution and delivery of this
      First Supplemental Indenture, hereby agree to be bound by the terms of the
      2002 Indenture as a Subsidiary Guarantor.

                                       32
<PAGE>
            Section 2.2 Attached hereto as Exhibit A is the form of the
      Subsidiary Guarantee to be executed by each New Guarantor as prescribed by
      the 2002 Indenture, by which each New Guarantor agrees to guarantee the
      obligations of the Company under the 2002 Indenture as set forth in the
      Subsidiary Guarantee.

SECTION 3. Effectiveness. This First Supplemental Indenture shall become
                          effective upon:

            (a)   the execution and delivery of this First Supplemental
                  Indenture by the Company, the Subsidiary Guarantors and the
                  Trustee; and

            (b)   the delivery by the Company to the Trustee of the Opinion of
                  Counsel and an Officers' Certificate as required pursuant to
                  Sections 11.04 and 11.05 of the 2002 Indenture and addressing
                  the matters required pursuant to such sections.

SECTION 4. Particular Representations and Covenants.

            Section 4.1. Authority. The Company, the Subsidiary Guarantors and
      the New Guarantors are duly authorized to execute and deliver this First
      Supplemental Indenture, and all corporate action on their part required
      for the execution and delivery of this First Supplemental Indenture has
      been duly and effectively taken.

            Section 4.2. Correctness of Recitals. The Company and the Subsidiary
      Guarantors and the New Guarantors represent and warrant that all recitals
      and statements in this First Supplemental Indenture are true and correct.

SECTION 5.  Concerning the Trustee.

            Section 5.1 Acceptance of Trusts. The Trustee accepts the trusts
      hereunder and agrees to perform same, but only upon the terms and
      conditions set forth in the Indenture.

            Section 5.2 Responsibility for Recitals. The recitals and statements
      contained in this First Supplemental Indenture shall be taken as recitals
      and statements of the Company, the Subsidiary Guarantors and the New
      Guarantors and the Trustee assumes no responsibility for the correctness
      of same. The Trustee makes no representations as to the validity or
      sufficiency of this First Supplemental Indenture, except that the Trustee
      is duly authorized to execute and deliver it.

SECTION 6.  Miscellaneous Provisions.

            Section 6.1 Counterparts. This First Supplemental Indenture may be
      executed in several counterparts, each of which shall be deemed an
      original, but all of which together shall constitute one instrument.

            Section 6.2 Compliance with Trust Indenture Act. This First
      Supplemental Indenture shall be interpreted to comply in every respect
      with the Trust Indenture Act of 1939, as amended, (the "TIA"). If any
      provision of this First Supplemental Indenture limits, qualifies or
      conflicts with the duties imposed by the TIA, the imposed duties shall
      control.

            Section 6.3 Headings. The section headings herein are for
      convenience only and shall not affect the construction hereof.

            Section 6.4 Binding Effect. All covenants and agreements in this
      First Supplemental Indenture by the Company or by any of the Subsidiary
      Guarantors shall bind their successors and assigns, whether so expressed
      or not.

                                       33
<PAGE>
            Section 6.5 Governing Law. The internal laws of the State of New
      York shall govern and be used to construe this First Supplemental
      Indenture.

            Section 6.6 Continuation of 2002 Indenture. Except as amended by
      this First Supplemental Indenture, the terms and conditions of the 2002
      Indenture shall remain in full force and effect.

      IN WITNESS WHEREOF, the parties hereto have caused this First Supplemental
Indenture to be duly executed, all as of the date first above written.

                                    PARKER DRILLING COMPANY

                                    By:
                                          ------------------------------------
                                    Name:  James J. Davis
                                    Title: Sr. Vice President-Finance and
                                           Chief Financial Officer

                                    JPMORGAN CHASE BANK, as Trustee

                                    By:
                                          ------------------------------------
                                    Name:
                                    Title:

                                    SUBSIDIARY GUARANTORS :

                                    Parker Drilling Company of Oklahoma,
                                    Incorporated
                                    Parker Drilling Company Limited (Nevada)
                                    Parker Drilling Company Limited (Oklahoma)
                                    Choctaw International Rig Corp.
                                    Parker Drilling Company of New Guinea,
                                    Inc.
                                    Parker Drilling Company North America, Inc.
                                    Parker-VSE, Inc. (formerly Vance Systems
                                    Engineering, Inc.)
                                    DGH, Inc.
                                    Parker Drilling Company International
                                    Limited
                                    Parker USA Drilling Company (formerly
                                    Parcan Limited)
                                    Parker Technology, Inc.
                                    Parker Drilling U.S.A. Ltd.
                                    Parker Drilling Offshore Corporation
                                    (formerly Hercules
                                    Offshore Corporation)
                                    Parker Drilling Offshore International, Inc.
                                    Anachoreta, Inc.
                                    Pardril, Inc.
                                    Parker Aviation, Inc.
                                    Parker Drilling (Kazakstan), Ltd.
                                    Parker Drilling Company of Niger
                                    Parker North America Operations, Inc.
                                    Selective Drilling Corporation
                                    Universal Rig Service Corp.
                                    Creek International Rig Corp.

                                    By:
                                       ---------------------------------------
                                    Name: David W. Tucker
                                    Its:  Vice President & Treasurer

                                       34
<PAGE>
                                    Parker Technology, L.L.C.

                                    By:
                                       ---------------------------------------
                                    Name: David W. Tucker
                                    Its:  Vice President & Manager

                                    Parker Drilling Offshore USA, L.L.C.
                                    (formerly Mallard Bay Drilling, L.L.C.)

                                    By:
                                       ---------------------------------------
                                    Name: David W. Tucker
                                    Its:  Treasurer & Manager

                                    Parker Drilling Management Services, Inc.

                                    By:
                                       ---------------------------------------
                                    Name: David W. Tucker
                                    Its:  President

                                    Quail Tools, L.LP.

                                    By:
                                       ---------------------------------------
                                    Name: James J. Davis
                                    Its:  Vice President & Treasurer

                                    NEW GUARANTORS:

                                    Parker Drilling Company of Colombia Limited

                                    By:
                                        ----------------------------------------
                                    Name:
                                    Its:

                                    International Equipment Leasing Company

                                    By:
                                        ----------------------------------------
                                    Name: David W. Tucker
                                    Its:  Vice President & Treasurer

                                       35

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