FORECAST ON OIL AND GAS EXPLORATION PROSPECTS OF THE SAGS IN SOUTHWEST TARIM BASIN BY THE FUZZY METHOD

The Southwest downwarping region is an important area for the exploration in the Tarim basin,the area of which is significantly big and has been explored for a long time.But there is still no breakthrough by far.What is about its exploration prospect? Are there any large oil and gas fields to be possibly found? So starting with the way of fuzzifying mathematics,the research tries to predict the future exploration of this wide area from a new perspective.It shows that we can allocate the feasible exploration areas along two belts:locating Kekeya oilfield around the mountain front fracture belts;locating the stratigraphic overlap hydrocarbon reservoir and the fault-block oilfield near one foreslope of the pericraton.