孤北洼陷沙四段油气成藏规律分析

ANALYSIS OF THE RULE OF HYDROCARBON RESERVOIR FORMING OF SHA NO.4 OF GUBEI DEPRESSION

孤北洼陷沙四段具有良好的油气成藏条件,但油气控制因素非常复杂。本文系统研究了孤北洼陷沙四段的沉积及储层特征,分析了油气成藏条件与油藏类型,总结了油气控制因素与油藏分布规律,指出了孤北鼻状构造带的缓坡扇三角洲砂体与滨浅湖滩坝是主要的勘探方向,对指导孤北洼陷沙四段的油气勘探具有重要意义。

There is a favorable condition to form the hydrocarbon reservoir of Sha No.4 in Gubei depression, but the controlling factors of the hydrocarbon are very complicated. In this paper, the characters of the deposition and reservoir of Sha No. 4 are systemically studied; the condition of hydrocarbon reservoir forming and the type of hydrocarbon reservoir are analyzed, and the controlling factors of hydrocarbon and the distributing rule of hydrocarbon reservoirs are summarized in Gubei depression. thereby, the primary exploration directions, namely the ramp fan - delta and the shore shallow lake bank - bar sand bodies of Gubei nose - like structure belt, are pointed out, which is very important to instruct the hydrocarbon exploration of Sha No. 4 in Gubei depression.