Characterization of Architecture of Intraplate Strike-Slip Faults in Yanchang Formation of Jinghe Oilfield in Southern Ordos Basin

被引：1

作者：

Meng Y. ^{[1
]}

Chen H. ^{[2
]}

Zhao Y. ^{[2
]}

Luo Y. ^{[2
]}

He F. ^{[3
]}

Wang G. ^{[3
]}

Dang W. ^{[3
]}

Xu Y. ^{[3
]}

机构：

[1] School of Earth Resources, China University of Geoscience, Wuhan

[2] Key Laboratory of Tectonics and Petroleum Resource of the Ministry of Education, China University of Geosciences, Wuhan

[3] SINOPEC North China Oil and Gas Branch, Zhengzhou

来源：

Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2023年 / 48卷 / 06期

关键词：

comprehensive fracture index log (CFI); damaged zone; fault segmentation; fault shape index attribute (FSI); fault zone architecture; fault zone width; intraplate strike-slip fault; southern Ordos basin; tectonics; Yanchang Formation;

D O I：

10.3799/dqkx.2023.007

中图分类号：

学科分类号：

摘要：

The architecture of intraplate strike-slip faults plays an important role in controlling reservoir properties as well as hydrocarbon migration and accumulation. In the process of exploration and development of strike-slip fault-controlled fracturing reservoirs, the architecture of the strike-slip fault zone needs to be characterized because of its high heterogeneity. Taking strike-slip fault zones of the Yanchang Formation of the Jinghe oilfield in the southern Ordos basin as an example, in this paper it conducted fault segmentation along the fault strike and lateral zonation along the fault dip by integrating core, logging and seismic data. In this paper it puts forward a method to quantitatively detect damage zone boundaries by cumulative curves of comprehensive fracture index log (CFI) and fault shape index attribute (FSI). The results show that strike-slip fault zones of the Yanchang Formation in the Jinghe oilfield are mainly composed of transtensional and strike-slip segments, and transpressional segments are rarely developed. CFI and FSI are positively correlated with fracture density, and damage zone boundaries can be detected according to the gradient change of the cumulative curves of CFI and FSI. The width of a single fault within the strike-slip fault zones in the Yanchang Formation of the Jinghe oilfield is mainly between 160−300 m, and the average width of transtensional segments is the largest, followed by transpressional and strike-slip segments. © 2023 China University of Geosciences. All rights reserved.

引用

页码：2281 / 2293

页数：12

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