<PAGE>

                                    FORM 10-Q


                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


    [ X ]         QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                              THE SECURITIES EXCHANGE ACT OF 1934

                  For the quarterly period ended June 30, 1999

                                       OR

    [   ]         TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF
                              THE SECURITIES EXCHANGE ACT OF 1934

        For the transition period from _______________ to ______________

                       Commission File number 33-11773-09


                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                                           <C>
                  Texas                                    76-0279533
(State or other jurisdiction of organization) (I.R.S. Employer Identification No.)
</TABLE>


                        16825 Northchase Drive, Suite 400
                              Houston, Texas 77060
                    (Address of principal executive offices)
                                   (Zip Code)

                                  (281)874-2700
              (Registrant's telephone number, including area code)

                                      None
              (Former name, former address and former fiscal year,
                          if changed since last report)


Indicate by check mark whether the Registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  Registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.

                                 Yes  X    No
                                     ---



<PAGE>


                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.

                                      INDEX



<TABLE>
<CAPTION>
PART I.    FINANCIAL INFORMATION                                                    PAGE
      <S>                                                                           <C>
      ITEM 1.    Financial Statements

            Balance Sheets

                - June 30, 1999 and December 31, 1998                                3

            Statements of Operations

                - Three month and six month periods ended June 30, 1999 and 1998     4

            Statements of Cash Flows

                - Six month periods ended June 30, 1999 and 1998                     5

            Notes to Financial Statements                                            6

      ITEM 2.    Management's Discussion and Analysis of Financial
                     Condition and Results of Operations                            10

PART II.    OTHER INFORMATION                                                       12


SIGNATURES                                                                          13
</TABLE>


<PAGE>

                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
                                 BALANCE SHEETS



<TABLE>
<CAPTION>
                                                                                  June 30,            December 31,
                                                                                    1999                  1998
                                                                               ---------------       ---------------
                                                                                (Unaudited)
<S>                                                                          <C>                   <C>
ASSETS:

Current Assets:
     Cash and cash equivalents                                               $        452,637      $          1,311
     Oil and gas sales receivable                                                     210,001               191,690
                                                                               ---------------       ---------------
          Total Current Assets                                                        662,638               193,001
                                                                               ---------------       ---------------

Gas Imbalance Receivable                                                               36,510                64,023
                                                                               ---------------       ---------------

Oil and Gas Properties, using full cost
     accounting                                                                     8,213,043             8,671,082
Less-Accumulated depreciation, depletion
     and amortization                                                              (6,893,233)           (6,737,489)
                                                                               ---------------       ---------------
                                                                                    1,319,810             1,933,593
                                                                               ===============       ===============
                                                                             $      2,018,958      $      2,190,617
                                                                               ===============       ===============


LIABILITIES AND PARTNERS' CAPITAL:

Current Liabilities:
     Accounts Payable                                                        $         90,847      $        158,562
                                                                               ---------------       ---------------

Deferred Revenues                                                                      24,851                52,630

Limited Partners' Capital (83,295 Limited Partnership
                           Units; $100 per unit)                                    1,872,481             1,957,698
General Partners' Capital                                                              30,779                21,727
                                                                               ---------------       ---------------
          Total Partners' Capital                                                   1,903,260             1,979,425
                                                                               ===============       ===============
                                                                             $      2,018,958      $      2,190,617
                                                                               ===============       ===============
</TABLE>


                 See accompanying notes to financial statements.

                                        3


<PAGE>

                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
                            STATEMENTS OF OPERATIONS
                                   (Unaudited)




<TABLE>
<CAPTION>
                                                    Three Months Ended                        Six Months Ended
                                                         June 30,                                 June 30,
                                             ---------------------------------        ---------------------------------
                                                 1999               1998                  1999               1998
                                             --------------     --------------        --------------     --------------
<S>                                       <C>                 <C>                  <C>                <C>
REVENUES:
     Oil and gas sales                    $        192,499    $       255,887      $        460,618   $        519,797
     Interest income                                 1,318              1,502                 1,459              4,581
     Other                                              --              1,680                    --              3,077
                                             --------------     --------------        --------------     --------------
                                                   193,817            259,069               462,077            527,455
                                             --------------     --------------        --------------     --------------


COSTS AND EXPENSES:
     Lease operating                                64,054             84,834               127,073            168,026
     Production taxes                                8,804             14,421                19,546             28,184
     Depreciation, depletion
          and amortization                          54,269            103,565               155,744            211,247
     General and administrative                     32,736             37,254                80,209             70,755
                                             --------------     --------------        --------------     --------------
                                                   159,863            240,074               382,572            478,212
                                             ==============     ==============        ==============     ==============
NET INCOME (LOSS)                         $         33,954    $        18,995      $         79,505   $         49,243
                                             ==============     ==============        ==============     ==============




Limited Partners' net income (loss)
     per unit                             $           0.26    $          0.23      $           0.55   $           0.59
                                             ==============     ==============        ==============     ==============
</TABLE>


                 See accompanying notes to financial statements.

                                        4

<PAGE>


                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
                            STATEMENTS OF CASH FLOWS
                                   (Unaudited)

<TABLE>
<CAPTION>
                                                                                             Six Months Ended
                                                                                                 June 30,
                                                                                   -------------------------------------
                                                                                        1999                  1998
                                                                                   ---------------       ---------------
<S>                                                                              <C>                   <C>
CASH FLOWS FROM OPERATING ACTIVITIES:
     Income (loss)                                                               $         79,505      $          49,243
     Adjustments to reconcile income (loss) to
          net cash provided by operations:
          Depreciation, depletion and amortization                                        155,744                211,247
          Change in gas imbalance receivable
               and deferred revenues                                                         (266)                  (869)
          Change in assets and liabilities:
               (Increase) decrease in oil and gas sales receivable                        (18,311)               118,088
               Increase (decrease) in accounts payable                                    (67,715)               (22,626)
                                                                                   ---------------       ---------------
          Net cash provided by (used in) operating activities                             148,957                355,083
                                                                                   ---------------       ---------------

CASH FLOWS FROM INVESTING ACTIVITIES:
     Additions to oil and gas properties                                                  (13,922)              (128,993)
     Proceeds from sales of oil and gas properties                                        471,961                     --
                                                                                   ---------------       ---------------
          Net cash provided by (used in) investing activities                             458,039               (128,993)
                                                                                   ---------------       ---------------

CASH FLOWS FROM FINANCING ACTIVITIES:
     Cash Distributions to partners                                                      (155,670)              (547,691)
                                                                                   ---------------       ---------------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                                      451,326               (321,601)
                                                                                   ---------------       ---------------
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD                                            1,311                390,534
                                                                                   ===============       ===============
CASH AND CASH EQUIVALENTS AT END OF PERIOD                                       $        452,637      $          68,933
                                                                                   ===============       ===============
</TABLE>


                 See accompanying notes to financial statements.

                                        5


<PAGE>

                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
                          NOTES TO FINANCIAL STATEMENTS
                                   (UNAUDITED)


(1)  General Information -

                  The financial statements included herein have been prepared by
        the  Partnership  and are  unaudited  except  for the  balance  sheet at
        December  31,  1998  which has been  taken  from the  audited  financial
        statements at that date. The financial  statements reflect  adjustments,
        all of which  were of a  normal  recurring  nature,  which  are,  in the
        opinion  of  the  managing   general   partner   necessary  for  a  fair
        presentation.  Certain  information  and footnote  disclosures  normally
        included in financial  statements  prepared in accordance with generally
        accepted  accounting  principles have been omitted pursuant to the rules
        and regulations of the Securities and Exchange Commission  ("SEC").  The
        Partnership  believes adequate disclosure is provided by the information
        presented.  The financial  statements should be read in conjunction with
        the audited  financial  statements  and the notes included in the latest
        Form 10-K.

(2)  Organization and Terms of Partnership Agreement -

                  Swift Energy  Income  Partners  1989-B,  Ltd., a Texas limited
        partnership  ("the  Partnership"),  was formed on June 30, 1989, for the
        purpose of  purchasing  and operating  producing oil and gas  properties
        within the continental United States. Swift Energy Company ("Swift"),  a
        Texas   corporation,   and  VJM   Corporation   ("VJM"),   a  California
        corporation,  serve as Managing  General  Partner  and  Special  General
        Partner of the  Partnership,  respectively.  The  general  partners  are
        required   to   contribute   up  to  1/99th  of  limited   partner   net
        contributions. The 661 limited partners made total capital contributions
        of $8,329,500.

                  Property acquisition costs and the management fee are borne 99
        percent by the limited partners and one percent by the general partners.
        Organization  and  syndication  costs were borne  solely by the  limited
        partners.

                  Generally,  all continuing costs (including development costs,
        operating costs,  general and  administrative  reimbursements and direct
        expenses) and revenues are allocated 90 percent to the limited  partners
        and ten percent to the general partners. If prior to partnership payout,
        however,  the cash  distribution  rate for a  certain  period  equals or
        exceeds  17.5  percent,  then for the  following  calendar  year,  these
        continuing  costs and  revenues  will be  allocated  85  percent  to the
        limited  partners  and  15  percent  to  the  general  partners.   After
        partnership  payout,  continuing  costs and  revenues  will be shared 85
        percent by the limited partners, and 15 percent by the general partners,
        even if the cash  distribution  rate is less than 17.5  percent.  During
        1992 and 1991, the cash distribution rate (as defined in the Partnership
        Agreement)  exceeded  17.5  percent  and  thus,  in 1993 and  1992,  the
        continuing  costs and  revenues  were  shared 85 percent by the  limited
        partners  and 15 percent by the general  partners.  During  1997,  1996,
        1995, 1994 and 1993, the cash  distribution rate fell below 17.5 percent
        and  thus,  in 1997,  1996,  1995 and  1994,  the  continuing  costs and
        revenues  were shared 90 percent by the limited  partners and 10 percent
        by the general partners. Payout occurred in January 1998; therefore, for
        1998  and  each  year  remaining  in the  life of the  partnership,  the
        continuing  costs and revenues  will be shared 85 percent by the limited
        partners and 15 percent by the general partners.

(3)  Significant Accounting Policies -

      Use of Estimates --

                  The  preparation  of financial  statements in conformity  with
        generally accepted  accounting  principles  requires  management to make
        estimates and assumptions that affect the reported amounts of assets and
        liabilities  at the date of the  financial  statements  and the reported
        amounts of revenues and expenses  during the  reporting  period.  Actual
        results could differ from estimates.

                                       6

<PAGE>


                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                   (UNAUDITED)


Oil and Gas Properties --

                  The Partnership accounts for its ownership interest in oil and
        gas properties using the proportionate consolidation method, whereby the
        Partnership's  share of assets,  liabilities,  revenues  and expenses is
        included in the appropriate classification in the financial statement.

                  For financial  reporting purposes the Partnership  follows the
        "full-cost"  method of accounting for oil and gas property costs.  Under
        this  method of  accounting,  all  productive  and  nonproductive  costs
        incurred in the  acquisition and development of oil and gas reserves are
        capitalized.  Such costs  include  lease  acquisitions,  geological  and
        geophysical  services,  drilling,  completion,   equipment  and  certain
        general and  administrative  costs directly  associated with acquisition
        and development activities.  General and administrative costs related to
        production and general overhead are expensed as incurred. No general and
        administrative  costs were capitalized  during the six months ended June
        30, 1999 and 1998.

                  Future  development,   site  restoration,   dismantlement  and
        abandonment   costs,   net  of  salvage  values,   are  estimated  on  a
        property-by-property  basis based on current economic conditions and are
        amortized  to  expense  as the  Partnership's  capitalized  oil  and gas
        property costs are amortized.

                  The  unamortized  cost of oil and gas properties is limited to
        the "ceiling  limitation"  (calculated  separately for the  Partnership,
        limited  partners and general  partners).  The "ceiling  limitation"  is
        calculated on a quarterly basis and represents the estimated  future net
        revenues from proved properties using current prices,  discounted at ten
        percent,  and the lower of cost or fair  value of  unproved  properties.
        Proceeds  from the sale or  disposition  of oil and gas  properties  are
        treated as a reduction  of oil and gas  property  costs with no gains or
        losses being recognized except in significant transactions.

                  The  Partnership  computes  the  provision  for  depreciation,
        depletion   and   amortization   of  oil  and  gas   properties  on  the
        units-of-production   method.   Under  this  method,  the  provision  is
        calculated  by  multiplying  the total  unamortized  cost of oil and gas
        properties,    including   future    development,    site   restoration,
        dismantlement  and abandonment  costs, by an overall  amortization  rate
        that  is  determined  by  dividing  the  physical  units  of oil and gas
        produced  during the period by the total  estimated  units of proved oil
        and gas reserves at the beginning of the period.

                  The calculation of the "ceiling  limitation" and the provision
        for  depreciation,  depletion and  amortization is based on estimates of
        proved reserves. There are numerous uncertainties inherent in estimating
        quantities  of proved  reserves  and in  projecting  the future rates of
        production,  timing and plan of development. The accuracy of any reserve
        estimate  is a  function  of  the  quality  of  available  data  and  of
        engineering  and  geological  interpretation  and  judgment.  Results of
        drilling,  testing and production subsequent to the date of the estimate
        may justify revision of such estimate.  Accordingly,  reserve  estimates
        are  often  different  from  the  quantities  of oil  and gas  that  are
        ultimately recovered.

(4)  Related-Party Transactions -

                  An  affiliate  of  the  Special  General  Partner,  as  Dealer
        Manager,  received  $202,238 for managing and overseeing the offering of
        the limited partnership units. A one-time management fee of $208,238 was
        paid to Swift for services performed for the Partnership.

                                       7
<PAGE>


                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                   (UNAUDITED)


                  Effective  June 30, 1989, the  Partnership  entered into a Net
        Profits and Overriding  Royalty Interest  Agreement ("NP/OR  Agreement")
        with Swift  Energy  Managed  Pension  Assets  Partnership  1989-B,  Ltd.
        ("Pension  Partnership"),  managed by Swift for the purpose of acquiring
        working  interests in producing oil and gas  properties.  Under terms of
        the  NP/OR  Agreement,  the  Partnership  will  convey  to  the  Pension
        Partnership a nonoperating  interest in the aggregate net profits (i.e.,
        oil and gas  sales net of  related  operating  costs) of the  properties
        acquired equal to its  proportionate  share of the property  acquisition
        costs.

(5)  Gas Imbalances -

                  The Partnership  recognizes its ownership  interest in natural
        gas  production as revenue.  Actual  production  quantities  sold may be
        different than the  Partnership's  ownership share in a given period. If
        the  Partnership's  sales exceed its ownership share of production,  the
        differences are recorded as deferred revenue. Gas balancing  receivables
        are  recorded  when the  Partnership's  ownership  share  of  production
        exceeds sales.

(6)  Vulnerability Due to Certain Concentrations -

                  The  Partnership's  revenues are primarily the result of sales
        of its oil and natural gas production.  Market prices of oil and natural
        gas may fluctuate and adversely affect operating results.

                  In the normal  course of  business,  the  Partnership  extends
        credit,  primarily in the form of monthly oil and gas sales receivables,
        to various  companies  in the oil and gas  industry  which  results in a
        concentration  of credit risk. This  concentration of credit risk may be
        affected by changes in economic or other  conditions and may accordingly
        impact the  Partnership's  overall  credit risk.  However,  the Managing
        General  Partner  believes  that  the  risk is  mitigated  by the  size,
        reputation, and nature of the companies to which the Partnership extends
        credit.  In  addition,   the  Partnership  generally  does  not  require
        collateral or other security to support customer  receivables.  (7) Fair
        Value of Financial Instruments -

                  The Partnership's  financial  instruments  consist of cash and
        cash equivalents and short-term  receivables and payables.  The carrying
        amounts  approximate  fair value due to the highly  liquid nature of the
        short-term instruments.

(7)  Year 2000 -

                  The  Year  2000  issue  results  from  computer  programs  and
        embedded computer chips with date fields that cannot distinguish between
        the years 1900 and 2000.  The  Managing  General  Partner  is  currently
        implementing  the steps necessary to make its operations and the related
        operations of the Partnership capable of addressing the Year 2000. These
        steps include upgrading, testing and certifying its computer systems and
        field   operation   services   and   obtaining   Year  2000   compliance
        certification  from  all  important  business  suppliers.  The  Managing
        General Partner formed a task force during 1998 to address the Year 2000
        issue and prepare its business  systems for the Year 2000.  The Managing
        General Partner has either replaced or updated mission  critical systems
        and expects to  complete  testing  during the third  quarter of 1999 and
        continue remedial actions as needed.


                                       8

<PAGE>


                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
                    NOTES TO FINANCIAL STATEMENTS (CONTINUED)
                                   (UNAUDITED)


                  The Managing  General  Partner's  business  systems are almost
        entirely  comprised of  off-the-shelf  software.  Most of the  necessary
        changes in computer  instructional  code can be made by  upgrading  this
        software.  The Managing  General  Partner is currently in the process of
        either upgrading the off-the-shelf  software or receiving  certification
        as to Year 2000  compliance from vendors or third party  consultants.  A
        testing phase is being conducted as the software is updated or certified
        and is expected to be completed during the third quarter of 1999.

                  The  Managing  General  Partner  does not  believe  that costs
        incurred  to address  the Year 2000 issue with  respect to its  business
        systems  will have a  material  effect on the  Partnership's  results of
        operations,  or its  liquidity and  financial  condition.  The estimated
        total cost to the Managing  General  Partner to address Year 2000 issues
        is  projected  to be less  than  $150,000,  most of which  will be spent
        during  the  testing  phase.  The  Partnership's  share of this  cost is
        expected to be insignificant.

                  The  failure  to correct a material  Year 2000  problem  could
        result  in an  interruption,  or  failure  of  certain  normal  business
        activities or  operations.  Based on  activities  to date,  the Managing
        General  Partner  believes that it will be able to resolve any Year 2000
        problems  concerning  its financial and  administrative  systems.  It is
        undeterminable  how all the  aspects  of the Year 2000 will  impact  the
        Partnership.  The most  reasonably  likely  worst  case  scenario  would
        involve a prolonged disruption of external power sources upon which core
        equipment   relies,   resulting  in  a   substantial   decrease  in  the
        Partnership's  oil and  gas  production  activities.  In  addition,  the
        pipeline  operators  to whom the  Managing  General  Partner  sells  the
        Partnership's  natural gas, as well as other  customers  and  suppliers,
        could be prone to Year  2000  problems  that  could not be  assessed  or
        detected by the Managing General  Partner.  The Managing General Partner
        is contacting  its major  purchasers,  customers,  suppliers,  financial
        institutions  and others  with whom it conducts  business  to  determine
        whether  they will be able to resolve  in a timely  manner any Year 2000
        problems directly  affecting the Managing General Partner or Partnership
        and to inform them of the Managing General Partner's internal assessment
        of its Year 2000  review.  There  can be no  assurance  that such  third
        parties will not fail to appropriately address their Year 2000 issues or
        will not  themselves  suffer a Year 2000  disruption  that  could have a
        material  adverse  effect  on the  Partnership's  activities,  financial
        condition  or  operating  results.  Based upon these  responses  and any
        problems  that arise  during the  testing  phase,  contingency  plans or
        back-up systems would be determined and addressed.


                                       9

<PAGE>

                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
                MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                       CONDITION AND RESULTS OF OPERATIONS


GENERAL

      The  Partnership  was formed for the purpose of investing in producing oil
and gas properties  located within the  continental  United States.  In order to
accomplish  this,  the  Partnership  goes through two  distinct yet  overlapping
phases  with  respect  to its  liquidity  and  result  of  operations.  When the
Partnership  is formed,  it commences its  "acquisition"  phase,  with all funds
placed in short-term  investments until required for such property acquisitions.
The interest  earned on these  pre-acquisition  investments  becomes the primary
cash flow source for initial partner distributions.  As the Partnership acquires
producing   properties,   net  cash  from  operations   becomes   available  for
distribution,  along with the investment  income.  After  partnership funds have
been expended on producing oil and gas properties,  the  Partnership  enters its
"operations" phase. During this phase, oil and gas sales generate  substantially
all revenues,  and  distributions  to partners  reflect those  revenues less all
associated  partnership expenses.  The Partnership may also derive proceeds from
the sale of acquired oil and gas properties, when the sale of such properties is
economically appropriate or preferable to continued operation.

LIQUIDITY AND CAPITAL RESOURCES

      Oil and gas reserves are depleting  assets and therefore often  experience
significant  production  declines each year from the date of acquisition through
the end of the life of the  property.  The primary  source of  liquidity  to the
Partnership comes almost entirely from the income generated from the sale of oil
and gas produced from ownership  interests in oil and gas  properties.  Net cash
provided by  operating  activities  totaled  $148,957  and  $355,083 for the six
months ended June 30, 1999 and 1998, respectively.  This source of liquidity and
the related results of operations, and in turn cash distributions,  will decline
in  future  periods  as the oil and gas  produced  from  these  properties  also
declines while production and general and administrative costs remain relatively
stable making it unlikely that the  Partnership  will hold the properties  until
they are fully depleted,  but will likely liquidate when a substantial  majority
of the reserves have been  produced.  Cash provided by property  sales  proceeds
totaled  $471,961 for the six months ended June 30, 1999.  The  Partnership  has
expended  all  of  the   partners'  net   commitments   available  for  property
acquisitions and development by acquiring producing oil and gas properties.  The
partnership invests primarily in proved producing properties with nominal levels
of future costs of development for proven but undeveloped reserves.  Significant
purchases  of  additional  reserves  or  extensive  drilling  activity  are  not
anticipated. Cash distributions totaled $155,670 and $547,691 for the six months
ended June 30, 1999 and 1998, respectively.

      The  Partnership  does  not  allow  for  additional  assessments  from the
partners  to fund  capital  requirements.  However,  funds  are  available  from
partnership  revenues,  borrowings  or  proceeds  from the  sale of  partnership
property.  The  Managing  General  Partners  believes  that the funds  currently
available to the partnership  will be adequate to meet any  anticipated  capital
requirements.

RESULTS OF OPERATIONS

      The  following  analysis  explains  changes  in the  revenue  and  expense
categories  for the quarter ended June 30, 1999 (current  quarter) when compared
to the quarter  ended June 30,  1998  (corresponding  quarter),  and for the six
months ended June 30, 1999  (current  period),  when  compared to the six months
ended June 30, 1998 (corresponding period).

Three Months Ended June 30, 1999 and 1998

      Oil and gas sales declined  $63,388 or 25 percent in the second quarter of
1999 when  compared  to the  corresponding  quarter  in 1998,  primarily  due to
decreased  oil and  gas  production.  Current  quarter  oil  and gas  production
declined  39 percent  and 38  percent,  respectively,  when  compared  to second
quarter 1998 production volumes. The partnership's sale of several properties in
the first six  months  of 1999 had an  impact  on the  partnership's  production
decline.  Oil  prices  increased  28  percent  or  $3.25/BBL  to an  average  of
$14.69/BBL  and gas prices  increased  11 percent or  $.23/MCF  to an average of
$2.43/MCF for the quarter.

                                       10

<PAGE>


                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
                MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL
                 CONDITION AND RESULTS OF OPERATIONS (CONTINUED)


      Corresponding  production costs per equivalent MCF increased 19 percent in
the second  quarter of 1999  compared to the second  quarter of 1998 while total
production costs decreased 27 percent, relating to the property sales in 1999.

      Associated  depreciation  expense  decreased 48 percent or $49,296 in 1999
compared to second  quarter  1998,  also  related to the  decline in  production
volumes.

Six Months Ended June 30, 1999 and 1998

      Oil and gas sales  declined  $59,179 or 11 percent in the first six months
of 1999 when  compared to the  corresponding  period in 1998,  primarily  due to
decreased oil  production.  Current  period oil  production  declined 36 percent
while gas production remained flat when compared to the same period in 1998. The
partnership's  sale of several properties in the first six months of 1999 had an
impact on the  partnership's  production  decline,  however,  the  decreased gas
production  was offset due to the release of suspended  gas revenue.  Oil prices
increased  11 percent or $1.34/BBL  to an average of  $13.19/BBL  and gas prices
remained steady at $2.10/MCF for the current period.

      Corresponding  production costs per equivalent MCF decreased 11 percent in
the first six months of 1999  compared  to the  corresponding  period in 1998 as
total production  costs decreased 25 percent,  relating to the property sales in
1999.

      Associated  depreciation  expense  decreased 26 percent or $55,503 in 1999
compared  to the first six  months  of 1998,  also  related  to the  decline  in
production volumes.

      During 1999,  partnership  revenues  and costs will be shared  between the
limited partners and general partners in a 85:15 ratio.


                                       11


<PAGE>


                    SWIFT ENERGY INCOME PARTNERS 1989-B, LTD.
                           PART II - OTHER INFORMATION




ITEM 5.    OTHER INFORMATION


                                     -NONE-



                                       12


<PAGE>


                                   SIGNATURES



Pursuant to the  requirements of Section 13 or 15(d) of the Securities  Exchange
Act of 1934,  the  Registrant  has duly  caused  this report to be signed on its
behalf by the undersigned thereunto duly authorized.


                                         SWIFT ENERGY INCOME
                                         PARTNERS 1989-B, LTD.
                                         (Registrant)

                              By:        SWIFT ENERGY COMPANY
                                         Managing General Partner

Date:     August 4, 1999      By:        /s/ John R. Alden
          --------------                 --------------------------------
                                         John R. Alden
                                         Senior Vice President, Secretary
                                         and Principal Financial Officer

Date:     August 4, 1999      By:        /s/ Alton D. Heckaman, Jr.
          --------------                 --------------------------------
                                         Alton D. Heckaman, Jr.
                                         Vice President, Controller
                                         and Principal Accounting Officer


                                       13