第34卷第2期 2017年3月
钻井液与
究
井液
DRILLINGFLUID&COMPLETIONFLUID
doi:10.3969/j.issn.1001-5620.2017.02.001
并壁强化作用影响因素自
的数值模拟
Vol. 34 No.2 Mar.2017
邱正松，宋丁丁2，刘均一‘，钟汉毅"，王伟吉1
李佳1，
（1.中国石油大学（华东）石油工程学院，山东青岛266580；2.中石化中原石油工程有限公司，河南濮阳457000）
李佳，邱正松，
深
素的数值模拟[]钻井液与完井液，2017，34（2）：1-8
共库化作
用喜因
LI Jia, QIU Zhengsong, SONG Dingding.
Drilling Fladd & Complerion Flarid
摘要适过建
新年
强化机理及
相关影响因表
该形专合趋劳口越近
关键词
同声传型渐关珠
2017.
桥控量启诺压力越提立
Numeric simulation of factors affecting the strengthening of borehole wall[] 2
) : 1-8.
内因素及作用机理还未得到深入竭示
同并
后端压力等因素的影响，对井壁由于压女下降所产生的形变，并转
地应力各向异性越小，裂缝闭
架桥位置距离裂维
笛材料架桥时，
裂缝尖瑶的扩展
锋的围咨文利市
并壁强化：多孔强性介质
：数值模报：裂缝架标：周向应力：影响因素
中图分类号：TE283
文献标识码：A
1001-5620 (2017) 02-0001-08
文章编号：
Numeric Simulation of FactorsAffecting theStrengthening ofBoreholeWall LI Jia', QIU Zhengsong', SONG Dingding, LIU Junyi', ZHONG Hanyi', WANG Weiji
(1. College of Petroleam Engineering, China University of Petroleam, Qingdao, Shandong 266580; 2. Cementing Branch of Zhongywan Petroleum Engineering Co. Lid., Sinopec, Puyang, Henan 457000)
Abstract Borehole wall strengthening, as an early-stage borehole wall plugging technology, has been widely applied and developed in recent years, while the influencing factors and mechanism of the technology is still not revealed yet. In a study conducted to analyze the influencing factors and the mechanism of the borehole wall strengthening technology, a finite element model of porous media was established, and the anisotropic properties, location of bridging, rate of mud losses, and the pressure at the rear-end of the fracture were studied for their effects on the strengthening of borehole wall. It was shown in laboratory simulation that rigid plugging material, by mitigating the deformation caused by the pressure reduction at the rear-end of fractures, and transmitting the deformation to around the wellbore, increased the circumferential stress around the wellbore near the fractures after being bridged, thereby causing the fractures to close. It was found that the less the anisotropy of the formation stresses, the more remarkable the tendency of the fractures to close. Also found was that the higher the rate of mud loss, the more beneficial it was for the particles to bridge, and the better for the strengthening of borehole wall. In bridging, the nearer was the location of bridging to the mouth of the fractures, the closer was the pressure at the rear-end of the bridging location to the formation pore pressure, and it was more beneficial to the closure of fractures and to the inhibition of the development of the fracture tips.
Key words Borehole wall strengthening; Porous elastic medium; Numeric simulation; Bridge in fracture; Circumferential stress; Influencing factors
基金项目：国家重点基础研究发展规划（973）项目（2015CB251205）、国家自然科学基金项目（51474236）、教育部创新团队（IRT1086）。
第一作者简介：李佳，1994年生，现为中国石油大学（华东）油气井工程专业在读硕士研究生，主要从事钻井液技术研究工作。电话15763949535；E-mail：15763949535@163.com。
通讯作者：邱正检，E-mail：qiuzs63@sina.com。
万方数据