力学与实践 ›› 2014, Vol. 36 ›› Issue (1): 54-63.DOI: 10.6052/1000-0879-13-363

• 应用研究 • 上一篇    下一篇

井壁失稳区域确定方法及影响因素分析

魏凯1,2, 马金山1, 管志川2, 齐金涛1, 张晓春3   

  1. 1 中国石油渤海钻探钻井技术服务公司, 天津300280;
    2 中国石油大学(华东), 山东青岛266580;
    3 大港油田石油工程研究院, 天津300280
  • 收稿日期:2013-08-29 修回日期:2013-12-04 出版日期:2014-02-08 发布日期:2014-02-14
  • 通讯作者: 魏凯,1983年生,男,工学博士学位,主要从事气体钻井技术、控压钻井技术、钻井工程风险评价等方面的工作.E-mail:upcweikai@163.com
  • 基金资助:

    国家重点基础研究发展计划(973 计划)(2010CB226706);“十二五”国家科技重大专项(2011ZX05021-001)和渤海钻探工程公司“十二五” 重点培育项目(2012ZD04K)资助项目.

DETERMINATION OF WELLBORE INSTABILITY AREA AND ANALYSIS OF INFLUENCING FACTORS

WEI Kai1,2, MA Jinshan1, GUAN Zhichuan2, QI Jintao1, ZHANG Xiaochun3   

  1. 1 Drilling Technology Service Company, BHDC, Tianjin 300280, China;
    2 College of Petroleum Engineering, China University of Petroleum, Shandong, Qingdao 266580, China;
    3 Petroleum Engineering Research Institute, Dagang Oilfield Company, Tianjin 300280, China
  • Received:2013-08-29 Revised:2013-12-04 Online:2014-02-08 Published:2014-02-14

摘要:

井壁失稳区域及其面积能够反映井壁失稳破坏特性及其严重程度,以井壁安全系数作为识别准则,建立了井壁失稳区域识别方法,并基于Monte-Carlo 方法,给出了井壁失稳面积的计算方法. 以井壁坍塌为例,分析了钻井液密度、井斜角及方位角对井壁失稳区域特性的影响,以本文建立的失稳区面积计算方法,分析了不同地应力场中井眼轨迹对井壁失稳区大小的影响,评价结果符合工程实际,表明能够利用本文方法评价井壁失稳特性及其严重程度.

关键词:

井壁稳定|井壁失稳区域面积|安全系数|蒙特卡罗模拟|井眼轨迹

Abstract:

The wellbore safety factor is used as a criterion to determine the wellbore instability area, and with the Monte-Carlo simulation, the instability area is calculated. To consider the wellbore collapse risk, the influence of the mud density, the deviation and the azimuth on the wellbore instability area is analyzed, and the effect of the well trajectory parameters on the wellbore instability in different in-situ stress fields is evaluated by the method of calculating the instability area proposed in this paper. The evaluation results agree with the actual engineering practice, which shows that this method could be used to evaluate the characteristics and the severity of the borehole instability.

Key words:

wellbore stability|wellbore instability area|safety factor|Monte-Carlo simulation|well trajectory

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