塔中北围斜区北东向走滑断裂特征及其控油作用

doi:10.11743/ogg20130612

Abstract

Abstract: A series of strike-slip faults occurr in north peri-cline area of the Tazhong Uplift in the Tarim Basin.The structural styles include flower structure,parallel high-steep fault,en-echelon structure etc.In the Middle Caledonian, the Tazhong-Ⅰ fault and the southern boundary fault were most active,and the NE-trending tear faults were formed because of the differential movement of NW-trending overthrust nappe or sliding block.In the Late Caledonian,the Tazhong uplift experienced strong oblique compression from the SE direction,which was the dynamic mechanism for the formation of strike-slip faults.This resulted in right-lateral strike-slip on the basis of basement weak zone.NE-trending strike-slip faults were formed in the tectonic setting of intraplate transpressional nature,and were connected with the NW-trending thrust fault.In the Late Caledonian to Early Hercynian,faults were developed in inheritance along the Middle Caledonian tear faults,and were characterized by multistage activities.The strike-slip faults not only greatly modified carbonate reservoirs,but also controlled the development of structural trap in the Paleozoic clasitc rocks.In addition,they also acted as important pathways of hydrocarbon migration.

Key words: formation and evolution of faults, control on oil accumulation, tear fault, strike-slip fault, north peri-cline area of Tazhong Uplift

CLC Number:

TE121.2

Yang Shengbin, Liu Jun, Li Huili, Zhang Zhongpei, Li Jingjing. Characteristics of the NE-trending strike-slip fault system and its control on oil accumulation in north peri-cline area of the Tazhong paleouplift[J]. Oil & Gas Geology, 2013, 34(6): 797-802.

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Characteristics of the NE-trending strike-slip fault system and its control on oil accumulation in north peri-cline area of the Tazhong paleouplift

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