FAULT SEALING IN YAKELA-LUNTAI AREA, THE TARIM BASIN

Most traps and pools in Yakela-Luntai area of the Tarim Basin are closely related to faults,which play a very important role in trap formation and hydrocarbon accumulation.Therefore,integrated research of fault sealing has become a decisive factor of the exploration in the area.The fault sealing of four typical fault-screened reservoirs in this area has been studied by geological qualitative analysis,(Allen)cross-section analysis,shale smear factor,etc.,so as to establish a standard evaluation criteria of fault sealing which can be used in the general appraisal of Yakela-Luntai area.In conclusion,faults seal well in the whole area,and control trap formation and hydrocarbon accumulation.Series of pools have been discovered along the fault belts.The Ya'nan Fault seals better in the east and the underlayer than in the west and the upside.Obviously,the Luntai Fault seals variously in different part and depth,in brief better in the east part(near Yegen area)than the west.