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.
出处
《油气地质与采收率》
CAS
CSCD
2003年第6期3-5,共3页
Petroleum Geology and Recovery Efficiency
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
nonconformity, mutation of sedimentary facies, stratigraphic correlation, Sha-2 member, Sha -3 member, Dongpu sag
