英买力—牙哈地区复式油气藏油气分布规律

Hydrocarbon distribution rule of complex reservoir in Yingmali-Yaha area

英买力—牙哈地区是塔北隆起油气勘探重要远景区之一。本文从分析区域油气成藏条件入手,明确该区南北两侧分别紧邻库车拗陷及北部拗陷可获双向油气源供给、上下叠置的圈闭发育以及继承性断裂的持续活动等是本区复式油气藏形成的基础;油气分布整体上受古隆起及斜坡控制,沿轮台凸起轴部的断裂带密布;局部聚集取决于储盖条件及输导系统,沿古构造高梁、不整合面及断裂呈阶梯状运聚。

Yingmaili-Yaha area is one of important prospect of hydrocarbon exploration in Tabei swell. Starting from analyzing regional hydrocarbon accumulation conditions,the paper clarified that the bidirectional supply of oil/gas resource gained from north and south sides of the region closely adjacent to Kuche Depression and North Depression,development of superposition of traps and continuous action of succession fault are the basis of the complex reservoir formed in the region; the hydrocarbon distribution was controlled by paleohigh and paleoslope as a whole,which closely distributed along the structural belt in axis of Luntai salient; the local accumulation depended on the reservoir-cap assemblage and conducting system and showed ladder-like migration along the high-part of paleostructure,unconformity surface and fracture.