DISCUSSION OF VOLCANIC FACIES DIVISION IN STUDIES OF BASIN PETROLEUM RESERVOIR

Volcanic reservoir lithofacies division is very important to determine favorable reservoir distribution and reservoir prediction. Aiming at volcanic rock reservoir exploration needs, combined with petroleum geological characteristics of volcanic in the Changling Fault Depression of the Songliao Basin, subfacies and microfacies of volcanic eruption and overflow facies were classified. The subfacies were divided into near crater, volcanic slope and far away from crater ones. The microfacies were divided into upper, middle and lower ones. New volcanic reservoir lithofacies division method reflects the characteristics of volcanic rock reservoir generation and distribution. It makes prediction effectively and is favorable for volcanic rock reservoir exploration.