The Pool-Forming Pattern and the Analysis of Main Control Factors of Putaohua Oillayer in Xujiaweizi Zone of the Northern Songliao Basin

There are 4 kinds of oil-and-gas reservoir in Xujiaweizi zone:fault-lithology reservoir,fault block reservoir,tectonic-lithology reservoir and lithology reservoir.The main target stratum is Putaohua oil layer.According to my research,the main styles of oil-and-gas reservior are fault-lithology researvior and fault block researvior,not the pure lithology researvior.Based on reservoir styles and characteristics,through analyzing the distributed law and pool forming period,I summarize 4 kinds of pool forming pattern of hydrocarbon migration and accumulation and confirm main control factors of pool forming and distribution.