<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 September 30, 1998

                                       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

                - September 30, 1998 and December 31, 1997                                     3

            Statements of Operations

                - Three month and nine month periods ended September 30, 1998 and 1997         4

            Statements of Cash Flows

                - Nine month periods ended September 30, 1998 and 1997                         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>
                                                                                         September 30,        December 31,
                                                                                             1998                 1997
                                                                                       ---------------      ---------------
                                                                                         (Unaudited)
         <S>                                                                           <C>                  <C>            
         ASSETS:

         Current Assets:
              Cash and cash equivalents                                                $        1,000       $      390,534 
              Oil and gas sales receivable                                                    209,945              402,035 
                                                                                       ---------------     ----------------
                  Total Current Assets                                                        210,945              792,569 
                                                                                       ---------------     ----------------

         Gas Imbalance Receivable                                                              84,970               93,964 
                                                                                       ---------------     ----------------

         Oil and Gas Properties, using full cost
              accounting                                                                    8,663,667            8,517,702 
         Less-Accumulated depreciation, depletion
              and amortization                                                             (6,309,920)          (5,532,503)
                                                                                       ---------------     ----------------
                                                                                            2,353,747            2,985,199 
                                                                                       ---------------     ----------------
                                                                                       $    2,649,662       $    3,871,732 
                                                                                       ===============     ================


         LIABILITIES AND PARTNERS' CAPITAL:

         Current Liabilities:
              Accounts Payable                                                         $      131,076       $      138,407 
                                                                                       ---------------     ----------------

         Deferred Revenues                                                                     55,030               59,718 

         Limited Partners' Capital (83,295 Limited Partnership Units;
                                   $100 per unit)                                           2,434,051            3,623,998 
         General Partners' Capital                                                             29,505               49,609 
                                                                                       ---------------     ----------------
                  Total Partners' Capital                                                   2,463,556            3,673,607 
                                                                                       ---------------     ----------------
                                                                                       $    2,649,662       $    3,871,732 
                                                                                       ===============     ================
</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                   Nine Months Ended
                                                        September 30,                       September 30,
                                              ---------------------------------  ---------------------------------
                                                   1998              1997               1998             1997
                                              ----------------  --------------   ---------------   ---------------
<S>                                           <C>               <C>              <C>               <C>             
REVENUES:
   Oil and gas sales                          $       184,871   $       372,971  $       704,668   $     1,213,067 
   Interest income                                        395             5,627            4,976            17,631 
   Other                                                1,101             1,368            4,178             6,033 
                                              ---------------   ---------------  ---------------   --------------- 
                                                      186,367           379,966          713,822         1,236,731 
                                              ---------------   ---------------  ---------------   --------------- 

COSTS AND EXPENSES:
   Lease operating                                     79,579           101,830          247,605           324,318 
   Production taxes                                     9,269            21,705           37,453            64,795 
   Depreciation, depletion
      and amortization -
        Normal                                         88,573           116,534          299,820           348,169 
        Additional                                    477,597                --          477,597                -- 
   General and administrative                          26,979            28,455           97,734           124,333 
                                              ---------------   ---------------  ---------------   --------------- 
                                                      681,997           268,524        1,160,209           861,615 
                                              ---------------   ---------------  ---------------   --------------- 
NET INCOME (LOSS)                             $      (495,630)  $       111,442  $      (446,387)  $       375,116 
                                              ===============   ===============  ===============   ===============



Limited Partners' net income (loss)
   per unit                                   $         (5.95)  $          1.34  $         (5.36)  $          4.50 
                                              ===============   ===============  ===============   ===============
</TABLE>


                 See accompanying notes to financial statements.

                                        4


<PAGE>


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


<TABLE>
<CAPTION>
                                                                                           Nine Months Ended
                                                                                             September 30,
                                                                               ---------------------------------------- 
                                                                                     1998                     1997
                                                                               ---------------          --------------- 
<S>                                                                             <C>                     <C>             
CASH FLOWS FROM OPERATING ACTIVITIES:
    Income (Loss)                                                               $     (446,387)         $       375,116 
    Adjustments to reconcile income (loss) to
      net cash provided by operations:
      Depreciation, depletion and amortization                                         777,417                  348,169 
      Change in gas imbalance receivable
          and deferred revenues                                                          4,306                   20,505 
      Change in assets and liabilities:
        (Increase) decrease in oil and gas sales receivable                            192,090                  242,117 
        (Increase) decrease in other current assets                                         --                   (6,288)
        Increase (decrease) in accounts payable                                         (7,331)                (168,869)
                                                                               ---------------          --------------- 
               Net cash provided by (used in) operating activities                     520,095                  931,179 
                                                                               ---------------          --------------- 
CASH FLOWS FROM INVESTING ACTIVITIES:
    Additions to oil and gas properties                                               (145,965)                 (74,350)
    Proceeds from sales of oil and gas properties                                           --                    4,336 
    (Increase) decrease in receivable due to property disposition                           --                  120,429 
                                                                               ---------------          --------------- 
               Net cash provided by (used in) investing activities                    (145,965)                 (70,014)
                                                                               ---------------          --------------- 
CASH FLOWS FROM FINANCING ACTIVITIES:
    Cash distributions to partners                                                    (763,664)                (899,009)
                                                                               ---------------          --------------- 
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                                  (389,534)                 (37,844)
                                                                               ---------------          --------------- 
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD                                       390,534                  497,687 
                                                                               ---------------          --------------- 
CASH AND CASH EQUIVALENTS AT END OF PERIOD                                      $        1,000          $       459,843 
                                                                               ===============          =============== 
</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,  1997  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 nine  months  ended
        September 30, 1998 and 1997.

                  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.

                  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.

                                       7


<PAGE>


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


(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.

(8)  Year 2000 -

                  The  Year  2000  issue  results  from  computer  programs  and
        embedded computer chips with date fields that cannot distinguish between
        the year  1900 and 2000.  The  Managing  General  Partner  is  currently
        implementing  the steps necessary to make its operations and the related
        operations of the Partnership  Year 2000 compliant.  These steps include
        upgrading,  testing and certifying  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 the year to address the Year 2000 issue to ensure that all
        of its business systems are Year 2000 compliant by mid-1999 with mission
        critical systems projected to be compliant by the end of 1998.

                  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 will be conducted as the software is updated or certified
        and is expected to be complete by mid-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,  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 in the next nine months.  The Partnership's  share of this cost is
        expected to be insignificant.


                                       8

<PAGE>


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


                  The  failure  to correct a material  Year 2000  problem  could
        result in an  interruption,  or a 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.  The
        Managing  General Partner is uncertain,  however,  as to the impact that
        the Year  2000  issue  will  have on field  operations  or as to how the
        Managing General Partner or the Partnership will be indirectly  affected
        by the impact that the Year 2000 issue will have on companies with which
        it conducts  business.  For example,  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  plans  to  contact  its  major   purchasers,
        customers,  suppliers,  financial  institutions  and others with whom it
        conducts  business to determine whether they will be Year 2000 compliant
        and  whether  they will be able to resolve  in a timely  manner any Year
        2000  problems.  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  $520,095  and $931,179 for the nine
months ended September 30, 1998 and 1997, 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.  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  $763,664 and $899,009 for the nine months ended  September 30, 1998 and
1997, respectively.

      The  Partnership  does  not  allow  for  additional  assessments  from the
partners  to fund  capital  requirements.  However,  funds  in  addition  to the
remaining  unexpended net capital commitments of the partners are available from
partnership  revenues,  borrowings  or  proceeds  from the  sale of  partnership
property.  The  Managing  General  Partner  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  September  30, 1998  (current  quarter) when
compared to the quarter ended September 30, 1997  (corresponding  quarter),  and
for the nine months ended September 30, 1998 (current period),  when compared to
the nine months ended September 30, 1997 (corresponding period).

Three Months Ended September 30, 1998 and 1997

      Oil and gas sales declined  $188,100 or 50 percent in the third quarter of
1998 when  compared  to the  corresponding  quarter  in 1997,  primarily  due to
decreased gas and oil  production.  Gas production  decreased 31 percent and oil
production  declined  39  percent.  The  decrease  in  production  volumes had a
significant impact on partnership performance. The partnership's sale of several
properties in 1997 had an impact on 1998 partnership  production volumes.  Also,
current  quarter  oil and gas prices  declined  34 percent or  $5.52/BBL  and 13
percent or $.30/MCF,  respectively,  further contributing to decreased revenues.
Corresponding  operating  expenses  declined 22 percent in the third  quarter of
1998 when compared to the third quarter of 1997.

      Associated  depreciation  expense  decreased 24 percent or $27,961 in 1998
compared  to third  quarter  1997,  also  related to the  decline in  production
volumes.

                                       10

<PAGE>

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


      The  Partnership   recorded  an  additional   provision  in  depreciation,
depletion  and  amortization  in the third quarter of 1998 for $477,597 when the
present value,  discounted at ten percent, of estimated future net revenues from
oil and gas  properties,  using the  guidelines of the  Securities  and Exchange
Commission,  was below the fair  market  value  originally  paid for oil and gas
properties. The additional provision results from the Managing General Partner's
determination  that the fair  market  value paid for  properties  may or may not
coincide  with reserve  valuations  determined  according to  guidelines  of the
Securities and Exchange Commission.

Nine Months Ended September 30, 1998 and 1997

      Oil and gas sales declined $508,399 or 42 percent in the first nine months
of 1998 when  compared to the  corresponding  period in 1997,  primarily  due to
decreased oil and gas prices. A decline in oil prices of 36 percent or $6.32/BBL
and in gas  prices  of 19  percent  or  $.48/MCF  had a  significant  impact  on
partnership performance. Also, current period oil and gas production declined 26
percent and 15 percent, respectively,  when compared to the same period in 1997,
further  contributing to decreased  revenues.  The partnership's sale of several
properties  in 1997  had an  impact  on  1998  partnership  production  volumes.
Corresponding  operating expenses for the first nine months of 1998 decreased 24
percent when compared to the same period in 1998.

      Associated  depreciation  expense  decreased 14 percent or $48,349 in 1998
compared  to the first  nine  months of 1997,  also  related  to the  decline in
production volumes.

      The  Partnership   recorded  an  additional   provision  in  depreciation,
depletion  and  amortization  in the first nine months of 1998 for $477,597 when
the present value,  discounted at ten percent,  of estimated future net revenues
from oil and gas properties, using the guidelines of the Securities and Exchange
Commission,  was below the fair  market  value  originally  paid for oil and gas
properties. The additional provision results from the Managing General Partner's
determination  that the fair  market  value paid for  properties  may or may not
coincide  with reserve  valuations  determined  according to  guidelines  of the
Securities and Exchange Commission.

      During 1998,  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-



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<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:  November 4, 1998      By:        /s/ John R. Alden
       ----------------                 ----------------------------------------
                                        John R. Alden
                                        Senior Vice President, Secretary
                                        and Principal Financial Officer

Date:  November 4, 1998      By:        /s/ Alton D. Heckaman, Jr.
       ----------------                 ----------------------------------------
                                        Alton D. Heckaman, Jr.
                                        Vice President, Controller
                                        and Principal Accounting Officer


                                       13