油气保存单元的概念与评价原理

doi:10.11743/ogg20040101

Abstract

Abstract:

A thorough understanding of seals is needed for petroleum exploration in marine carbonate strata in Tarim basin, Ordos basin and southern China. A concept of ″petroleum preservation unit″ is presented. It is a petroliferous geological unit with fluids being sealed in 3D space within a sedimentary basin. According to their spatial structures and evolution in geologic history, hydrocarbon preservation units can be classified into three basic types,succession,modification and reconstruction types.Hydrocarbon preservation unit can be delineated based on analysis of cap rocks, sealing capacity and sealing time of faults,as well as some key events,such as volcanic activities, earthquake and hydrogeological process.In combination with the study of basin and petroleum system,pool-forming elements and processes can further be analysed,and comprehensive evaluation of hydrocarbon preservation units can then be made.In the case of Chuxiong basin,seven hydrocarbon preservation units have been analyzed and evaluated,and Dongshan,Zhonghe-Dayao and Yongren have finally been selected to be the three favorable hydrocarbon preservation units.

Key words: seal, fault's sealing capacity, hydrocarbon preservation unit, comprehensive appraisal

CLC Number:

TE112.5

He Dengfa, Ma Yongsheng, Yang Minghu. Concept and appraisal principles of hydrocarbon preservation unit[J]. Oil & Gas Geology, 2004, 25(1): 1-8.

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Concept and appraisal principles of hydrocarbon preservation unit

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