<ARTICLE>                     5
<LEGEND>
This schedule contains summary financial information extracted from Swift Energy
Managed Pension Assets Partnership 1991-A, LTd.'s Balance Sheet and Statement of
Operations contained in its Form 10-Q for the Quarter ended September 30, 1996.
</LEGEND>
       
                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                              DEC-31-1996
<PERIOD-END>                                   SEP-30-1996
<CASH>                                         1,184
<SECURITIES>                                   0
<RECEIVABLES>                                  6,618
<ALLOWANCES>                                   0
<INVENTORY>                                    0
<CURRENT-ASSETS>                               7,802
<PP&E>                                         1,667,636
<DEPRECIATION>                                 (1,266,050)
<TOTAL-ASSETS>                                 409,388
<CURRENT-LIABILITIES>                          387,172
<BONDS>                                        0
<PREFERRED-MANDATORY>                          0
<PREFERRED>                                    0
<COMMON>                                       0
<OTHER-SE>                                     22,216
<TOTAL-LIABILITY-AND-EQUITY>                   409,388
<SALES>                                        13,718
<TOTAL-REVENUES>                               13,753
<CGS>                                          0
<TOTAL-COSTS>                                  215,461<F1>
<OTHER-EXPENSES>                               0
<LOSS-PROVISION>                               0
<INTEREST-EXPENSE>                             0
<INCOME-PRETAX>                                (215,428)
<INCOME-TAX>                                   0
<INCOME-CONTINUING>                            (215,428)
<DISCONTINUED>                                 0
<EXTRAORDINARY>                                0
<CHANGES>                                      0
<NET-INCOME>                                   (215,428)
<EPS-PRIMARY>                                  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>