源外斜坡区油气成藏要素空间匹配关系及对成藏的作用

SPATIAL MATCHING RELATIONSHIP OF RESERVOIR FORMATION ELEMENTS IN SLOPPING AREA OUTSIDE OIL SOURCE AND ITS EFFECT ON RESERVOIR FORMATION

通过研究松辽盆地北部西斜坡区萨二、三油层油气成藏要素空问匹配关系和其对油藏的控制作用得到，西斜坡区萨二、三油层油气成藏有3个要素：齐家一古龙凹陷青山口组源岩、小幅度构造及岩性圈闭和被断裂沟通的砂体输导通道。西斜坡区萨二、三油层圈闭位于齐家一古龙凹陷青山口组源岩区侧上方，主要由4条输导通道沟通：第1条输导通道从齐家凹陷经泰康至富拉尔基；第2条输导通道从古龙凹陷经白音诺勒至二站、阿拉新；第3条输导通道从古龙凹陷经白音诺勒至富拉尔基；第4条输导通道从古龙凹陷经巴彦查干至泰来。3个成藏要素空间匹配关系对西斜坡区萨二、三油层油气成藏与分布的控制作用主要表现在：油气主要分布在运移输导通道上或附近；运移输导量越大，油气越富集。

The research on the spatial matching relationship of reservoir formation elements in S2 and S3 Formation of west slopping area of Songliao Basin and its controlling effect on the reservoir shows that there are 3 reservoir formation elements in S2 and S3 Formation of west slopping area： sourcing rock of Qingshankou Formation in Qijia- Gulong Sag, low amplitude structure and lithologic trap and sandbody transporting pathway connected by fi＇actures. Traps in S2 and S3 formation of west slopping area are above the sourcing rock of Qingshankou Formation in Qijia- Gulong Sag, consisting of 4 transporting pathways： transporting pathway from Qijia Sag via Taikang to Fulajier; transporting pathway from Gulong Sag via Baiyinnuole to Erzhan, Alaxin; transporting pathway from Gulong Sag via Baiyinnuole to Fulajier; transporting pathway from Gulong Sag via Bayanchagan to Tailai. The controlling effects of the spatial matching relationship of 3 reservoir formation elements on the hydrocarbon reservoir formation and distribution of S2 and S3 formation of west slopping area are： hydrocarbon is distributed in, or near by the transportingpathway; the concentration of hydrocarbon increased along with the transporting capacity.