胜利油区孤北洼陷孔店组生烃潜力探讨

Discussion on the Hydrocarbon Potential of Ek in Gubei Low-lying of Shengli Oil Region

陈广军 张林晔

胜利油田有限公司地质科学研究院

Geological Scientific Research Institute , Shengli Oilfield Company , SINOPEC, Shandong 257015 , P. R. China

胜利油区孤北洼陷是一个富生烃洼陷,在其周围已经发现多个大油田,已证实其主要生烃层系为沙三段烃源岩。但在前期勘探过程中有许多探井发现的含油层其埋藏深度都超过了洼陷中沙三段的最大埋深,这些超深油藏是属于沙三段生成油气的“倒灌”,还是来自可能埋藏更深的烃源层系? 文中对孔店组的生烃条件及潜力进行了初步探讨,指出孔店组是该区含油层系中一个可能的烃源层系,并对其生烃潜力进行了预测,不仅解释了超深油气藏的形成问题,而且为该区下一步勘探打下了基础,并为长堤古潜山的勘探提供了新的思路。

Gubei low-lying is abundant of hydrocarbon generating in Shengli oil region. Several big oilfields had been discovered around it . It also has been approved that the main hydrocarbon source rock is Es3 . But the buried depth of a lots of oil layers in many wells all exceeds the maximum depth of hydrocarbon source rock of Es3 during the exploration before. Is it the over-deep reservoir comes from the reverse pouring of oil and gas generated from Es3 ? Or may come from one new hydrocarbon source rock buried more deeper ? This paper discussed elementarily the Ek condition of hydrocarbon generating and its potential , pointed out Ek is one possible hydrocarbon source rock this region , also forecasted its potential. Not only explaining the over-deep reservoir being , but also making groundwork tor next exploration , it is one new reason for exploration on changdi buried-hill.