摘要
应用含油气盆地数值模拟技术和储层烃类成藏化石记录资料,比较并分析了东濮凹陷西部斜坡带不同台阶带的成藏流体历史,为研究区的勘探评价与部署提供了重要参数及依据。生排烃史模拟表明,I台阶沙三段主力烃源岩的生烃史曲线表现为早期生烃型,Ⅱ台阶为持续生烃型,Ⅲ台阶为二次生烃型;从Ⅰ台阶→Ⅱ台阶→Ⅲ台阶,同一层位烃源岩进入生烃门限和开始排烃的时间逐渐变晚,生排烃能力逐渐减小。储层流体包裹体资料揭示,西部斜坡带经历了两期油气充注过程,其中第一期发生时间相对较早,以液态烃形式充注于Ⅰ台阶和Ⅱ台阶的沙三段储层之中;第二期发生时间晚,但涉及范围广,以气态烃形式充注于Ⅰ、Ⅱ和Ⅲ台阶的沙三下亚段储层之中。
The study of the fluid history of hydrocarbon accumulation in different steps in the Western Slope Belt of Dongpu Depression can provide some important parameters and references to the prospect evaluation and arrangement. This paper analyses the history by the technique of petroliferous basin numerical modeling and the data of fossil record about hydrocarbon migration and accumulation in reservoir rocks. The modeling of hydrocarbon generation and expulsion histories show that the curves of hydrocarbon generated of the Third Member of the Shahejie Formation source rock in the steps I , II and III present the style of persistent generation, forepart generation and secondary generation respectively. From Step I to Step III, the beginning for hydrocarbon generation and expulsion of source rock is getting later, and the abilities of hydrocarbon generation and expulsion are also becoming smaller. The fluid inclusion data in reservoir rocks indicate that two periods of hydrocarbon charging have ever occurred in the study area. The first period happened earlier, when liquid hydrocarbon was charged in the Third Member of the Shahejie Formation reservoir within the steps I and II. Whereas the other one was later, when gasous hydrocarbon was filled only in the lower part of the Third Member of the Formation reservoir within all the three steps.
出处
《地质科技情报》
CAS
CSCD
北大核心
2009年第5期65-70,共6页
Geological Science and Technology Information
基金
国家自然科学基金项目(40172051)
关键词
东濮凹陷
成藏流体历史
生排烃史
流体包裹体
油气充注
Dongpu Depression
fluid history of hydrocarbon accumulation
hydrocarbon generation and expulsion history
fluid inclusion
oil and gas filling
