Abstract:

Oil-gas pools of Baiyinchagan Depression are principally distributed in the Middle and Upper parts of Tenggar Formation of Bayanhua Group,Lower Cretaceous.The reservoirs of thick oil is above the oil generation threshold,thin oil is below that.There main oil-gas pool types of the depression are:(1)the reverse drag-anticlin oil pools;(2)drape-anticlin oil pools;(3)fault-block and fault-nose oil pools.The pool types and scales are controlled by oil source sag,regional source-reservoir-cap rock complex,anticlinal structures or fault-blocks and sedimentary facies or sandbody types.

Key words: oil-gas pool, distribution, type, controlling factor, Baiyinchagan Depression