新疆石油地质 ›› 2025, Vol. 46 ›› Issue (1): 1-12.doi: 10.7657/XJPG20250101

• 油气勘探 •    下一篇

塔里木盆地顺北4号走滑断裂带分段地应力特征及裂缝分布预测

黄超1(), 郭宏辉1, 张生龙1, 朱林涛1, 冯建伟2, 杜赫3   

  1. 1.中国石化 西北油田分公司 勘探开发研究院,乌鲁木齐 830011
    2.中国矿业大学(徐州) 资源与地球科学学院,江苏 徐州 221116
    3.中国石油大学(华东) 地球科学与技术学院,山东 青岛 266580
  • 收稿日期:2024-07-24 修回日期:2024-09-05 出版日期:2025-02-01 发布日期:2025-01-24
  • 作者简介:黄超(1986-),男,湖北监利人,副研究员,硕士,地质工程一体化,(Tel)0991-3160810(Email)huangch.xbsj@sinopec.com
  • 基金资助:
    国家自然科学基金(42072234);中国石化科技部项目(P21071-2)

In-situ Stress Characteristics and Fracture Distribution Prediction of Different Segments in Shunbei No.4 Strike-Slip Fault Zone, Tarim Basin

HUANG Chao1(), GUO Honghui1, ZHANG Shenglong1, ZHU Lintao1, FENG Jianwei2, DU He3   

  1. 1. Research Institute of Exploration and Development, Northwest Oilfield Company, Sinopec, Urumqi, Xinjiang 830011, China
    2. School of Resources and Earth Sciences, China University of Mining and Technology (Xuzhou), Xuzhou, Jiangsu 221116, China
    3. School of Geosciences and Technology, China University of Petroleum (East China), Qingdao, Shandong 266580, China
  • Received:2024-07-24 Revised:2024-09-05 Online:2025-02-01 Published:2025-01-24

摘要:

以塔里木盆地顺北地区走滑断裂带发育背景为基础,利用地质力学理论分析顺北4号走滑断裂带不同分段地应力状态、断裂周缘裂缝系统及单井产能特征。根据纵横波测井与岩石力学实验获得的储集层力学条件,构建三维地质力学模型,并基于弹塑性理论,利用有限元数值模拟方法,预测了走滑断控模式下目的层裂缝发育特征。研究表明,断裂带各段地应力模式不同;地质单元结构差异控制地应力分布,裂缝高密度区多呈条带状分布于断裂两侧或断裂之间;在安德森Ⅰa型、Ⅲ型地应力模式下,裂缝高密度区油气井具高产特征。明确了顺北走滑断裂带不同分段的地应力条件、裂缝发育特征及单井油气高产的主控因素。

关键词: 塔里木盆地, 顺北地区, 顺北4号走滑断裂带, 地应力, 裂缝预测, 构造分段, 数值模拟

Abstract:

Based on the development background of the strike-slip fault zone in the Shunbei area of the Tarim Basin, the in-situ stress states, the fracture systems around faults, and the well productivity characteristics in different segments of the Shunbei No.4 strike-slip fault zone were analyzed by using geomechanical theories. According to the reservoir mechanical properties obtained through P-wave and S-wave logging and rock mechanics experiments, a 3D geomechanical model was constructed. Based on the elastoplastic theory, and by using the finite element numerical simulation method, the fracture development characteristics of the target layer controlled by the strike-slip faults were predicted. The research results show that the in-situ stress patterns vary across segments in the fault zone. The differences in structures of geological units control the in-situ stress distribution, and regions with high fracture density typically exhibit a strip-like distribution on both sides of the fault or between faults. High fracture density combined with Anderson-type Ⅰa and Ⅲ stress states is associated with wells exhibiting high yields. The in-situ stress conditions, fracture development characteristics, and key factors controlling high well productivity in different segments in the Shunbei strike-slip fault zone were clarified.

Key words: Tarim Basin, Shunbei area, Shunbei No.4 strike-slip fault zone, in-situ stress, fracture prediction, structural segment, numerical simulation

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