方正断陷三维区油气聚集规律特征

The Law of Oil & Gas Accumulate in 3D Seismic Zone of FangZheng Fault

方正断陷位于松辽盆地东侧的依-舒地堑中北段,为一个一级负向构造单元。根据钻井资料,结合地震资料对研究区油气成藏条件进行综合分析,认为该区具备良好的生储盖组合条件,圈闭条件较好,油气藏的类型主要为构造油气藏和岩性油气藏。通过对各主要目的层的构造特征,相带展布规律及储层发育特征,结合钻探成果进行综合分析,结果表明:伊汉通断裂是本区油气运移的主要通道,伊汉通断裂两侧发育的圈闭、新安村+乌云组下部发育的岩性圈闭、柞树岗次凹斜坡处发育的岩性圈闭、达连河组发育的岩性圈闭及其顶面发育的构造圈闭是油气聚集的主要场所。

The FangZheng fault depression lies in the middle north of the Yi-Shu graben of the Song-Liao basin,lt＇ s a negative tectonic units. According to the drilling data and seismic data,comprehensive analysis of the oil-gas reservoir-forming conditions,this paper knows that this area has good source-reservoir-cap rock combinations and trap conditions.The reservoir types are mainly structural reservoir and lithologic reservoir.Through the comprehensive analysis of the structural features,facies distributive law and reservoir development features in the main target area,concluded that YiHan- tong fault is the main pathway of the hydrocarbon migration;the hydrocarbon accumulation areas are traps lying in the both sides of the YiHan-tong fault, lithologie traps developed in the bottom part of the XinAncun-WuYun formation and lithologic traps in the DaLian river formation and structural traps in it＇ s surface formation.