石油与天然气地质 ›› 2016, Vol. 37 ›› Issue (3): 387-393.doi: 10.11743/ogg20160311

• 油气地质 • 上一篇    下一篇

断层对地应力场方向的影响机理

刘中春1,2, 吕心瑞1,2, 李玉坤3, 张辉3   

  1. 1. 中国石化 石油勘探开发研究院, 北京 100083;
    2. 中国石化 海相油气藏开发重点实验室, 北京 100083;
    3. 中国石油大学(华东) 储运与建筑工程学院, 山东 青岛 266580
  • 收稿日期:2015-09-17 修回日期:2016-01-23 出版日期:2016-06-08 发布日期:2016-06-22
  • 第一作者简介:刘中春(1965—),女,博士、高级工程师,油田开发与提高采收率。E-mail:liuzc.syky@sinopec.com。
  • 基金项目:
    国家科技重大专项(2011ZX05014-003);中央高校基本科研业务费专项资金项目。

Mechanism of faults acting on in-situ stress field direction

Liu Zhongchun1,2, Lyu Xinrui1,2, Li Yukun3, Zhang Hui3   

  1. 1. Petroleum Exploration & Production Research Institute, SINOPEC, Beijing 100083, China;
    2. Marine Oil and Gas Reservoirs Development Key Laboratory, SINOPEC, Beijing 100083, China;
    3. China University of Petroleum (East China), Qingdao, Shandong 266580, China
  • Received:2015-09-17 Revised:2016-01-23 Online:2016-06-08 Published:2016-06-22

PDF (PC)

906

被引次数

6

摘要： 断层附近区域地应力方向相对于远离断层区域存在明显变化。前人利用实验及有限元模拟等手段研究了断层对其附近区域地应力方向的影响规律，但是缺少从力学机理角度解释这些规律的研究。研究总结了单一断层附近最大水平主应力方向变化规律，利用孔口问题弹性力学解析解揭示了这种规律的力学机理，并以某单元为例，研究了多断层区域最大主应力方向沿断层走向上的变化。结果表明，断层端部区域最大水平主应力朝着断层走向偏转，应用孔口问题弹性力学求解可以获得理论证明，塔河某单元的地应力计算结果也验证了这种规律。

关键词: 椭圆孔口问题, 地应力, 断层, 塔河油田

Abstract: Direction of in-situ stress near a fault is significantly different with that far away from the fault.Experimental approaches and finite element simulation method were previously used to study the patterns of faults acting on in-situ stress field direction,but these patterns were never explained in respect of mechanical mechanism.The regularity of elasticity mechanical mechanism were reveals by using the analytical solution of elliptic orifice problems based on study of the change patterns of the maximum horizontal principal stress direction near a single fault.And a block was taken as an example to study the change of the direction of maximum principal stress along fault strike in areas with multiple faults.The results show that the maximum horizontal principal stress deviates to the fault strike at the ends of faults.The phenomenon can be well explained with the aid of orifice problem of elastic mechanics analytical solution.The calculation results of in-situ stress in one unit of Tahe oilfield also verify the rule.

Key words: elliptic orifice problem, in-situ stress, fault, Tahe oilfield

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