<ARTICLE>                     5
<LEGEND>
This schedule contains summary financial information extracted from Swift Energy
Income Partners 1987-B, Ltd.'s balance sheet and statement of operations
contained in its Form 10-K for the year ended December 31, 1999 and is
qualified in its entirety by reference to such financial statements.
</LEGEND>

                             
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                              DEC-31-1999
<PERIOD-END>                                   DEC-31-1999
<CASH>                                         5,355
<SECURITIES>                                    0
<RECEIVABLES>                                  289,654
<ALLOWANCES>                                   0
<INVENTORY>                                    0
<CURRENT-ASSETS>                               323,052
<PP&E>                                         24,271,480
<DEPRECIATION>                                 (22,272,110)
<TOTAL-ASSETS>                                 2,323,105
<CURRENT-LIABILITIES>                          27,307
<BONDS>                                        0
<PREFERRED-MANDATORY>                          0
<PREFERRED>                                    0
<COMMON>                                       0
<OTHER-SE>                                     2,152,600
<TOTAL-LIABILITY-AND-EQUITY>                   2,323,105
<SALES>                                        482,297
<TOTAL-REVENUES>                               495,688
<CGS>                                          0
<TOTAL-COSTS>                                  395,898<F1>
<OTHER-EXPENSES>                               0
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             0
<INCOME-PRETAX>                                (56,404)
<INCOME-TAX>                                   0
<INCOME-CONTINUING>                            (56,404)
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   (56,404)
<EPS-BASIC>                                    0
<EPS-DILUTED>                                  0

<FN>
<F1>Includes lease operating expenses, production taxes and depreciation and
amortization expense.  Excludes general and administrative and interest expense.
</FN>