BEDROCK HYDROCARBON-BEARING CHARACTERISTICS AND POOL-FORMING CONDITIONS OF MAMUWUSU SAG IN BADAIN JARAN BASIN

There are several Paleozoic sags in Badain Joran Basin.The first two wells drilled in Mamuwusu sag of the northwestern part of the basin were all found good oil/gas show,which indicated the possibility of forming bedrock oil/gas pools.The source rocks is Jurassic,the unconformity surfaces and faults are the dominant migration pathway,and the bedrock shows relative good storage ability.There are a series of block traps of buried hills in the area and distribution of oil and gas is different in different parts.The bedrock oil-gas pools may be the important exploration targets in the basin.