EXHIBIT 21

                            SIGNIFICANT SUBSIDIARIES




              NAME                             JURISDICTION OF INCORPORATION
              ----                             ----------------------------- 

         Thaipo Limited                                  Thailand    
                                                                     
     B8/32 Partners Limited                              Thailand    
                                                                     
       Arch Petroleum Inc.                               Delaware    
                                                                     
        Pogo Canada Ltd.                              Alberta, Canada