东营凹陷中央隆起带断裂构造及油气运移

doi:10.11743/ogg20050219

Abstract

Abstract:

Central uplift belt of Dongying depression has been formed as a result of joint action of the extensional fault-flexure folding of Chennan fault and diapirism of plastic salt-mud layers controlled by regional and local structural stress fields. Development levels and combination features of structures in the central uplift belt are spatially quite different, due to differential actions of various factors, such as distribution of salt-mud layers, sedimentary features when the faults were active and regional tectonic stress field. The central uplift belt can be divided into 3 structural zones, i.e. Xinzhen, Dongying and Liangjialou-Xianhezhuang structural zones. Distributions of oil and gas are closely related to faulting in the central uplift belt:(1) hydrocarbons have mainly been accumulated in shallow reservoirs as secondary pools when the strength of faulting changed from weak to strong; (2) hydrocarbons have mainly been accumulated in deep reservoirs as primary pools when the strength of faulting changed from strong to weak; (3) hydrocarbons have been accumulated both in shallow and deep reservoirs constitute complex oil-gas accumulation zone with multiple oil-bearing series and various types of oil pools when the strength of faulting changed first from weak to strong and then from strong to weak.

Key words: Dongying depression, central uplift belt, fault system, opening and closing of fault

CLC Number:

TE112.322

Ma Lijuan, Zheng Herong, Xie Xinong. Faulted structures and hydrocarbon migration in central uplift belt of Dongying Depression[J]. Oil & Gas Geology, 2005, 26(2): 246-251.

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Faulted structures and hydrocarbon migration in central uplift belt of Dongying Depression

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