Stretch-convergence stress effect tectonic analysis and gas controlling of strike-slip fault zone in strong deformed zone

Yin Shuai, Li Ai-rong, Chen Meng-na, Zhao Jin-li, Ding Wen-long, Zhao Jing-zhou, Cao Xiang-yu

doi:10.11764/j.issn.1672-1926.2018.04.011

2018 , Vol. 29 >Issue 11: 1568 - 1574

DOI: https://doi.org/10.11764/j.issn.1672-1926.2018.04.011

Stretch-convergence stress effect tectonic analysis and gas controlling of strike-slip fault zone in strong deformed zone

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1.School of Earth Science and Engineering， Xi’an Shiyou University， Xi’an 710065， China; 2.China Petroleum Shanxi Coalbed Methane Exploration and Development Branch， Jincheng 048000， China; 3.School of Energy Resources， China University of Geosciences， Beijing 100083， China

Received date: 2017-07-09

Revised date: 2018-04-17

Online published: 2018-12-17

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Abstract

The Qinshui Basin is located inside the North China Plate and is an active residual basin in the Mesozoic and Cenozoic tectonic activity.The strata in the basin have been strongly deformed and developed a lot of strike-slip faults.The combination of strike-slip faults can indicate the stress of the local formation and affect the petrophysical properties of the reservoir.In this paper， the extensional-convergence stress effect of the strike-slip fault zone in the strong deformed zone and its effect on the capacity of the tight reservoir are analyzed in detail in the southern Qinshui Basin.The results show that the study area has been influenced by the compressive stress from the north east since the Himalayan Period， and the fault has the property of dextral strike slip.Under the action of this stress field， the right-hand right-order fault indicates the extension region， and the right-hand left-order fault indicates the convergence region.Based on this principle， the extension area and the convergence area are divided.From the northwest direction to the southeast direction， the two regions have interactive distribution characteristics.For the Fanzhuang block in the eastern part of the study area， the distribution of the faults have a “S-type” trend from north to south， and the middle extension region is the elbow or the turning end of the “S-type” area， or called the “Stress transition zone”.The tectonic stress field of the stress transition zone is complex and the fracture is usually developed.Gas wells with higher capacity are mainly distributed in the extension zone， while the capacity of the gas wells in the converging area is usually low.The results show that the reliability of the tectonic analysis method is consistent with that of the extensional-aggregation stress effect analysis.

Key words： Strike-slip fault zone; Extension area; Convergence area; Tight reservoir; Capacity

Cite this article

Yin Shuai, Li Ai-rong, Chen Meng-na, Zhao Jin-li, Ding Wen-long, Zhao Jing-zhou, Cao Xiang-yu . Stretch-convergence stress effect tectonic analysis and gas controlling of strike-slip fault zone in strong deformed zone[J]. Natural Gas Geoscience, 2018 , 29(11) : 1568 -1574 . DOI: 10.11764/j.issn.1672-1926.2018.04.011

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