AGREEMENT The undersigned reporting persons hereby agree that the statements filed pursuant to this Schedule 13D dated June 29, 1998, to which this Agreement is filed as an exhibit, are filed on behalf of each of them.

   1
                                   EXHIBIT 1

                                   AGREEMENT

         The undersigned reporting persons hereby agree that the statements
filed pursuant to this Schedule 13D dated June 29, 1998, to which this
Agreement is filed as an exhibit, are filed on behalf of each of them.

Date:  June 29, 1998              ENERGY CAPITAL INVESTMENT COMPANY PLC
                                  
                                  
                                  
                                  By:  /s/   ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇ 
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                                       ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇
                                       Director
                                  
                                  
                                  
Date:  June 29, 1998              ENCAP EQUITY 1994 LIMITED PARTNERSHIP
                                  
                                  
                                  
                                  /s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇   
                                  ---------------------------------------------
                                       ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇
                                       Managing Director
                                  
                                  
Date:  June 29, 1998              ENCAP INVESTMENTS L.C.
                                  
                                  
                                  /s/ ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇ 
                                  ---------------------------------------------
                                       ▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇
                                       Managing Director