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AAPG Bulletin, Preliminary version published online Ahead of Print 2 August 2021.

Copyright © 2021. The American Association of Petroleum Geologists. All rights reserved.


Two distinct strike-slip Previous HitfaultNext Hit networks in the Shunbei area and its surroundings, Tarim Basin: Hydrocarbon accumulation, distribution and controlling factors

Shang Deng123 , Rui Zhao1 , Qiangfu Kong1 , Yingtao Li12 , and Bing Li1

1 Petroleum Exploration and Production Research Institute, SINOPEC, Beijing, 100083, China
2 Northwest Oilfield Company, SINOPEC, Urumuqi, Xinjiang, 830011, China
3 Ma Yongsheng’s Laboratory, Beijing, 100083, China

Ahead of Print Abstract

Over the last few decades, significant advances in acquisition of new 3D seismic datasets have revealed the existence of a spectacular strike-slip Previous HitfaultNext Hit system consisting of multiple Previous HitfaultNext Hit networks developed across the northern Tarim Basin. These strike-slip Previous HitfaultNext Hit networks are of significant importance to petroleum exploration because of their dual roles as conduits for hydrocarbon migration and Previous HitfaultNext Hit-controlled paleokarst reservoirs. In this study, two representative strike-slip Previous HitfaultNext Hit networks are selected for detailed analysis to understand their control on hydrocarbon accumulation and distribution.
In the “X-shaped” TP39-TP29 Previous HitfaultNext Hit network developed in the Tabei uplift, high-production wells are distributed mainly along the first-order north-northeast-oriented Previous HitfaultNext Hit TP39, particularly in the pull-apart structures. This is attributed to the reactivation of Previous HitfaultNext Hit TP39 in the late Hercynian and Himalayan Orogenies when oil accumulation mainly occurred, whereas the north-northwest-striking faults remained inactive. In the TP39-TP29 Previous HitfaultNext Hit network, areas of higher Previous HitfaultNext Hit intensities (Previous HitfaultNext Hit abundance) generally coincide with the distribution of high-producing wells except those located distantly from Previous HitfaultNext Hit TP39.
In the SB5-SB1 Previous HitfaultNext Hit network, the divergent strike-slip Previous HitfaultNext Hit (SB1) has a higher average well performance than the convergent strike-slip Previous HitfaultNext Hit (SB5). Unlike the TP39-TP29 Previous HitfaultNext Hit network in which fractured paleokarst reservoirs are widely developed in the Shunbei area where widely developed karstification is absent, brittle Previous HitfaultNext Hit zones including Previous HitfaultNext Hit breccia and fractures in the tight Ordovician carbonates provide permeable conduits and space for transporting hydrocarbon and storage, respectively. Releasing bends concentrating dilation breccias are characterized by a higher degree of hydrocarbon accumulation than restraining bends and simple strike-slip segments.

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Please cite this AAPG Bulletin Ahead of Print article as:

Shang Deng , Rui Zhao , Qiangfu Kong , Yingtao Li , Bing Li: Two distinct strike-slip Previous HitfaultTop networks in the Shunbei area and its surroundings, Tarim Basin: Hydrocarbon accumulation, distribution and controlling factors, (in press; preliminary version published online Ahead of Print 02 August 2021: AAPG Bulletin, DOI:10.1306/07202119113.