
第38卷第3期 2016年5月
石
油
采钻
工
艺
OILDRILLING&PRODUCTION TECHNOLOGY
文章编号:10007393(2016)03035207
DOI: 10.13639/j.odpt.2016.03.015
基于细观损伤多相耦合自
的砂砾岩水力
压裂裂缝扩展数值模拟余东合’徐康泰”车航’张登文’刘国华马新仿?
1.中国石油草北油国分公司采油工程研究院;2.中国石油大学(北京)石油工程学院
Vol. 38 No. 3 May 2016
引用格式:余东合,徐康泰,车航,张整文,刘国华,马新仿.基于细现损伤多相耦合的砂砾岩水力压裂裂缝扩展数值模拟[』].石油钻工艺,2016,38(3):352-358
摘要:低渗遗砂殊常油藏水力压裂缝扩展机理及其数值模数研究,对该类鳍层压裂改遗成功实施具有重要意义。将砂殊岩储层中砾石表征为基质-交界面-陈石的三模态结构,假定石分布与儿何尺寸及储层物性满足随机分布,结合Moter-
考虑储层渗流场、应力场、水化膨胀温度场的三相竭合特征,结合损伤力学、断裂力学
Carolo方法,完成砂师岩储层数学表征;2
等原理,利用细观损伤有限元的方法,建立了砂研岩储层水力压裂款缝扩展数学模型,并进行数值模拟研究。模拟分析了不同主应力差、基质一砾石交界面强度、石强度情况下,水力裂缝遇研石扩展情沉,并最终实现砂研岩储层水力聚缝动态扩展数值模拟。研究表明,水力裂缝遇砾发生烧殊、穿陈、止裂现象,并以绕研扩展为主,且裂缝发生明显转向,存在羽状次生裂缝;裂缝转向程度和裂缝延伸长度与主应力差、研石强度以及交界面强度有关,主要表现有:水平主应力差越小,水力裂缝遇研转向越明显;基质-陈石交界面强度增加,水力裂缝明显变短,并难以转向;随着砾石强度的增大,裂缝的转向程度增大
关键词:砂砾岩储层;水力裂缝扩展;多相耦合;细观损伤;数值模拟
中图分类号:TE357.1
文献标识码:A
Numerical simulation on hydraulic fracture propagation in glutenite reservoir based on
microscopicdamagemultiphasecoupling
YU Donghe', XU Kangtai', CHE Hang,ZHANG Dengwen', LIU Guohua", MA Xinfang
1. Oil Prodarctiorn Engineering Research Jnstifufe of Huabei Oilfeld Company, CNPC, Rengiu, Hebei 062552, China
2. College of Petrolem Engireering of China University of Petroleum (Bejing), Bejing 102249, China
Citation: YU Donghe, XU Kangtai, CHE Hang, ZHANG Dengwen, LIU Guohua, MA Xinfang. Numerical simulation on hydraulic-oaa oanod [ dn ase e oasoa aq oasaa oeneod ae ogy, 2016, 38(3): 352-358
Abstract: The numerical simulation on hydraulic fracture propagation in low permeability glutenite oil reservoir is of great sig-nificance to the successful fracturing stimulation of this reservoir. By characterizing the gravel in the glutenite reservoir as a matrix-interface-gravel three modal textures, and assuming that the gravel distribution, geometry and reservoir property meet the random distribution, the mathematical characterization of glutenite reservoir was completed with the Moter-Carolo method. Taking into account the tri-phase coupling of reservoir seepage field, stress field and hydration propagation moisture field, and according to the principles of damage mechanics and fracture mechanics, the microscopic damage finite element method was used to establish a mathematical model
基金项目:中国石油天然气股份有限公司重大科技专项“华北油田上产稳产800万吨关键技术研究与应用"(编号:2014E-35-08-03)第一作者:余东合(1966-),1987年毕业于西南石油学院石油地质专业,一直从事油田开发技术研究和管理工作,高级工程师。通讯地址:
(062552)河北省任市华北油田公司采油工程研究院。电话;0317-2728443。E-mail:pjb_ydh@petrochina.com.cn
马新份(1972-),别教投,主要从事采油工程理论与技术研究和教学工作。通讯地址:(102249)北京市昌平区府学略18号。电
通讯作者:
i; 010-89734593。 E-mail; maxinfang@cup.edu.cn
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