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AAPG Bulletin

Abstract

AAPG Bulletin, V. 106, No. 1 (January 2022), P. 77-102.

Copyright ©2022. The American Association of Petroleum Geologists. All rights reserved.

DOI: 10.1306/07202119113

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

Shang Deng,1 Rui Zhao,2 Qiangfu Kong,3 Yingtao Li,4 and Bing Li5

1Petroleum Exploration and Production Research Institute, Sinopec, Beijing, China; Northwest Oilfield Company, Sinopec, Urumuqi, Xinjiang, China; Ma Yongsheng’s Laboratory, Beijing, China; [email protected]
2Petroleum Exploration and Production Research Institute, Sinopec, Beijing, China; [email protected]
3Petroleum Exploration and Production Research Institute, Sinopec, Beijing, China; [email protected]
4Petroleum Exploration and Production Research Institute, Sinopec, Beijing, China; Northwest Oilfield Company, Sinopec, Urumuqi, Xinjiang, China; [email protected]
5Petroleum Exploration and Production Research Institute, Sinopec, Beijing, China; [email protected]

ABSTRACT

Over the last few decades, significant advances in acquisition of new three-dimensional seismic data sets 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 HitfaultTop 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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