<ARTICLE> 5
       
                             
<PERIOD-TYPE>                   12-MOS                   
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                       5,660,354
<SECURITIES>                                         0
<RECEIVABLES>                                3,162,289
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                             8,725,616
<PP&E>                                      34,691,297
<DEPRECIATION>                              16,995,329
<TOTAL-ASSETS>                              28,143,343
<CURRENT-LIABILITIES>                          868,796
<BONDS>                                        143,050
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                    30,891,689
<OTHER-SE>                                     608,222
<TOTAL-LIABILITY-AND-EQUITY>                28,143,343
<SALES>                                              0
<TOTAL-REVENUES>                             7,649,415
<CGS>                                        3,599,407
<TOTAL-COSTS>                                7,813,743
<OTHER-EXPENSES>                               920,485
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                            (4,684,220)
<INCOME-TAX>                                   151,000
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (4,835,220)
<EPS-PRIMARY>                                   (0.43)
<EPS-DILUTED>                                   (0.43)