东海盆地西湖凹陷孔雀亭区断裂体系特征及控藏效应

doi:10.12108/yxyqc.20250114

岩性油气藏 ›› 2025, Vol. 37 ›› Issue (1): 161–169.doi: 10.12108/yxyqc.20250114

东海盆地西湖凹陷孔雀亭区断裂体系特征及控藏效应

薛煜恒¹, 李坤¹, 尚娅敏², 陈秋佟¹, 盛烈豪¹, 刘建斌³

1. 油气藏地质及开发工程全国重点实验室, 成都理工大学, 成都 610059;
2. 中国石油新疆油田公司采油二厂, 新疆克拉玛依 834000;
3. 中海石油(中国)有限公司上海分公司, 上海 200120

收稿日期:2024-05-01 修回日期:2024-07-23 出版日期:2025-01-01 发布日期:2025-01-04
第一作者:薛煜恒（1999—），男，成都理工大学在读硕士研究生，研究方向为断裂活动性分析评价。地址：（610059）四川省成都市成华区二仙桥东三路1号成都理工大学。Email：1252397776@qq.com。
通信作者: 李坤（1980—），男，博士，讲师，主要从事石油构造分析与含油气盆地分析方面的教学与科研工作。Email:lk1210_7758@qq.com。
基金资助:
中海油“十四五”重大专项“弧后盆地深层/超深层油气成藏条件与成藏机制研究-西湖凹陷”（编号：CCL2022SHPS006RS/01）资助。

Characteristics and reservoir control effects of the fault system in Kongqueting area of Xihu Sag，East China Sea Basin

XUE Yuheng¹, LI Kun¹, SHANG Yamin², CHEN Qiutong¹, SHENG Liehao¹, LIU Jianbin³

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology Chengdu Sichuan 610059, China;
2. No. 2 Oil Production Plant, PetroChina Xinjiang Oilfield Company, Karamay 834000, Xinjiang, China;
3. Shanghai Branch of China National offshore Oil Corporation., Shanghai 200120, China

Received:2024-05-01 Revised:2024-07-23 Online:2025-01-01 Published:2025-01-04

摘要/Abstract

摘要： 以三维地震精细解释为基础，运用构造剖面复原、流体包裹体分析等方法，对东海盆地西湖凹陷孔雀亭区断裂体系特征进行了分析，并对其演化特征及控藏效应进行了研究。研究结果表明：①西湖凹陷孔雀亭区断裂体系具有明显东、西分区、分带特征。平面上，东部发育3组方向主干伸展断裂，NNE向为主，NE向及近NS向次之，西部发育2组方向主干伸展断裂，NE向为主，NNE向次之；剖面上东部以多米诺式斜列构造样式为主，西部以同向断阶为主；自西向东可分为5个断阶带，东部发育2个反向断裂带，西部发育3个同向断裂带。②研究区断裂体系经历了断陷期、断-坳转换期、坳陷反转期以及区域沉降期4个演化阶段，断裂活动性表现出“东部为早强晚弱、西部为早弱晚强”差异演化特征。③研究区发育东部反向断槽-局部自圈油气藏和西部顺向断阶-岩性尖灭油气藏，其中东部的油气藏为双源供烃，是油气富集有利区，尤其是F2和F3断裂活动性强、断距较大，所控圈闭的面积和高度大，在平湖组富油、花港组下段富气，是有利勘探区。

关键词: 伸展断裂, 断裂活动性, 双源供烃, 断裂控藏, 反向断槽-局部自圈油气藏, 顺向断阶-岩性尖灭油气藏, 西湖凹陷, 东海盆地

Abstract: Based on the fine interpretation of 3D seismic data，the characteristics of the fault system in Kongqueting area of Xihu Sag in the East China Sea Basin were analyzed using methods such as structural profile reconstruction and fluid inclusion analysis. The evolution characteristics and reservoir control effects were studied. The results show that：（1）The fault system in Kongqueting District of Xihu Sag has obvious differences in east and west zoning，and showing different zoning. On the plane，there are three sets of main extensional faults developed in the east，mainly in the NNE direction，followed by the NE direction and near NS direction，and two sets of main extensional faults developed in the west，mainly in the NE direction，followed by the NNE direction； On the profile，the eastern part is dominated by a domino shaped oblique structure style，while the western part is dominated by syndromic fault terraces；From west to east，it can be divided into 5 fault zones，with 2 reverse fault zones developed in the east and 3 syndromic fault zones developed in the west.（2）The fault system in the research area has gone through four evolutionary stages：fault depression period，fault depression conversion period，depression inversion period，and regional subsidence period. The fault activity shows differential evolution characteristics of“early strong and late weak in the east，early weak and late strong in the west”.（3）The research area has developed reverse fault groove-local self enclosed oil and gas reservoir in the east，as well as forward fault terraces and lithological pinch out oil and gas reservoirs in the west. The reservoirs in the east are dual source hydrocarbon supply，which are favorable for oil and gas accumulation zone. Especially，the F2 and F3 faults have strong activity，large fault displacement，large controlled trap area and height. They are rich in oil in the Pinghu Formation and rich in gas in the lower section of the Huagang Formation，making them favorable exploration areas.

Key words: extensional fracture, fracture activity, dual source hydrocarbon supply, fracture controlled storage, reverse fault groove-local self enclosed oil and gas reservoir, forward fault terraces and lithological pinch out oil and gas reservoir, Xihu Sag, East China Sea Basin

中图分类号:

TE122

薛煜恒, 李坤, 尚娅敏, 陈秋佟, 盛烈豪, 刘建斌. 东海盆地西湖凹陷孔雀亭区断裂体系特征及控藏效应[J]. 岩性油气藏, 2025, 37(1): 161–169.

XUE Yuheng, LI Kun, SHANG Yamin, CHEN Qiutong, SHENG Liehao, LIU Jianbin. Characteristics and reservoir control effects of the fault system in Kongqueting area of Xihu Sag，East China Sea Basin[J]. Lithologic Reservoirs, 2025, 37(1): 161–169.

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东海盆地西湖凹陷孔雀亭区断裂体系特征及控藏效应

Characteristics and reservoir control effects of the fault system in Kongqueting area of Xihu Sag，East China Sea Basin

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