渤海海域新生代褶皱作用

doi:10.11743/ogg20090411

Abstract

Abstract:

This paper summarizes the types of the Cenozoic folding,their controlling factors and distribution in the Bohai Sea waters based on seismic data interpretations.According to their mechanical genesis,the folding can be classified into four types which are respectively related to extension,wrench,compression induced by gravity sliding,and compaction and diapirism caused by gravity.Extension-related folding and compression-rela-ted folding happened during the Paleogene and these two types of folds are distributed along the long-active main faults and slopes respectively.Wrench-related folding happened during the Neogene and the folds are distributed in the eastern part of the Bohai Bay Basin where the Tanlu fault zone passes by.Among the gravity-related fol-ding types,the drape folding had been active in the whole Cenozoic and the folds are distributed on the salient.While the salt diapirism folding was restricted to certain areas and the faults occur only in the Laizhou Bay sag at the south of the basin.The current exploration results in the Bohai Sea waters show that traps located along the faults and related to the wrench folds of the Late Neogene are favorable for oil and gas accumulation.

Key words: oil and gas trap, extensional folding, wrench folding, compressive folding, gravity folding, Ceno-zoic, Bohai Sea waters

CLC Number:

TE121.2

Chen Shuping, Lü Dingyou, Tang Liangjie, Wang Yingbin, Sun Mengsi, Qu Dongmeng, Yang Xianfan,. The Cenozoic folding in the Bohai Sea waters[J]. Oil & Gas Geology, 2009, 30(4): 455-461.

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The Cenozoic folding in the Bohai Sea waters

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