大庆石油地质与开发

2003, (06) 13-14+71

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东濮凹陷下第三系泥岩异常超压带微裂隙研究
Study on microfissure of abnormal pressure zone in Tertiary mudstone of Dongpu Depression

王金萍,王峻,范海玲,李新海
WANG Jin-ping; et al. (Exploration and Development Science Institute of Zhongyuan Oilfield Subcompany; Puyang 457001 ; China);

摘要(Abstract):

主要论述了泥岩异常超压带内微裂隙的几种确定方法、分布及成藏机制的研究。表明东濮凹陷异常超压带微裂隙排烃带垂向分布在3 300~4 400 m之间,横向上区域性分布。同时,在微裂隙带内,泥岩孔隙度、伊蒙混层矿物含量、氯仿沥青“A”/TOC和20S/(20S+20R)C29等值出现较明显的低值,说明该带出现油气运移。提出了泥岩混相涌流成藏模式。
This paper mainly discussed several methods used to decide microfissure, its distribution and reservoir-forming mechanism in abnormal pressure zone in mudstone. It was showed that expulsion zone was distributed between 3 300-4 400 m vertically and was regional laterally. Furthermore, to mudstone porosity, mineral content of illite mixed layer, chloroform bitumen "A" /TOC and 20S/ (20S+20R) C29 etc. in microfissure zone, the values were low, which indicated that hydrocarbon migration had occurred in this are-a. Thus it was considered that the reservoir was formed by mudstone miscible surge.

关键词(KeyWords): 异常超压带;微裂隙排烃带;成藏模式
abnormal pressure zone; microfissure expulsion zone; reservoir-forming pattern

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 王金萍,王峻,范海玲,李新海
WANG Jin-ping; et al. (Exploration and Development Science Institute of Zhongyuan Oilfield Subcompany; Puyang 457001 ; China);

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