东濮凹陷沙三段与沙二段接触关系讨论  

Discussion on the contact relationship between Sha - 2 member and Sha - 3 member in Dongpu sag.

作　　者：谢英刚[1] 郭建华[2] 蒋小琼[3] 张椿华[4] 

机构地区：[1]江汉石油学院 [2]中南大学 [3]中国石化无锡实验地质研究所 [4]中原油田分公司采油二厂

出　　处：《油气地质与采收率》2003年第6期3-5,共3页Petroleum Geology and Recovery Efficiency

摘　　要：前人研究认为,东濮凹陷沙三段与沙二段的接触关系为整合或假整合,从而影响了层序边界的识别。该文从区域地质条件对比、沉积相的突变、生物灭绝、物源变化、地层对比等六个方面,论证了东濮凹陷沙三段与沙二段的接触关系为凹陷范围内的不整合,且与控凹断层活动强度的周期性幕式变化有关,为层序边界的识别提供了依据。Predecessor' s research considered that the contact relationship between Sha - 2 member and Sha - 3 member in Dongpu sag is conformity or pseudo-conformity, and this effects the identification of sequence boundary. Based on the analysis of regional geological correlation , the mutation of sedimentary facies, biological extinction , the change of source and the stratigraphic correlation , the author has put forward the opinion that the contact relationship between Sha - 2 member and Sha -3 member is nonconformity in the whole sag. And it is related with the cyclic episodic variation of the activity strength of the faults that controlled the sag around. This has provided evidence for the identification of sequence boundary.

关 键 词：东濮凹陷 沙三段 沙二段 接触关系 相变 地层对比 地质 油气勘探 

分 类 号：P618.130.2[天文地球—矿床学]