弱面理论在吉木萨尔页岩体积改造中的应用  

Application of Weak Surface Theory in the Volume Stimulation of Jimusar Shale

作　　者：郑东升 肖阳 贾海正[1] 何文 李佳琦[1] Zheng Dongsheng;Xiao Yang;Jia Haizheng;He Wen;Li Jiaqi(PetroChina Xinjiang Oilfield Company,Karamay,Xinjiang 834000,China;Chengdu University of Technology,Chengdu,Sichuan 610059,China;Chengdu Ligong Sun-Energy Technology Co.Ltd.,Chengdu,Sichuan 610059,China)

机构地区：[1]中国石油新疆油田分公司,新疆克拉玛依834000 [2]成都理工大学,四川成都610059 [3]成都理工阳光能源科技有限公司,四川成都610059

出　　处：《特种油气藏》2020年第3期105-108,共4页Special Oil & Gas Reservoirs

基　　金：国家自然科学基金“多尺度多应力场耦合致密砂岩体积改造裂缝评价模型研究”(51504042);国家科技重大专项“鄂南致密低渗油藏水力压裂裂缝起裂及扩展规律”(2016ZX05048-001-04-LH);四川省教育厅基金重点项目“自流注水关键节点仿真及流动耦合计算模型研究”(18ZA0063)。

摘　　要：针对吉木萨尔油页岩缝网压裂裂缝形态认识不清的问题,从页岩储层改造特征出发,结合弱面强度理论,研究吉木萨尔页岩储层水力压裂缝网形成机理,定量化改进水力裂缝与天然裂缝、层理面相交作用准则,分析缝网扩展延伸规律,确定体积改造的工程可控参数。研究表明,排量为12 m^3/min、净液量为2 596 m^3、砂比为0. 1~0. 2可有效增大体积压裂裂缝改造效果,增大泄油面积。该研究为吉木萨尔页岩体积改造设计提供了理论依据和参数指导。The shale gas reservoir stimulation performance was analyzed to understanding the fracture morphology of the Jimusar oil shale with network stimulation.Weak surface theory was combined to study the formation mechanism of hydraulic fracturing network.The intersection criterion between hydraulic fracture,natural fracture and bedding plane was quantitatively improved to analyze the propagation pattern of network and determine operation parameters.Research indicates that the volume stimulation performance can be effectively enhanced to increase the oil drainage area when the displacement is 12 m 3/min,the net fluid volume is 2596 m 3 and the sand ratio is 0.1~0.2.This research could provide a theoretical basis and guidance for the volume stimulation design of Jimusar shale.

关 键 词：页岩 天然裂缝 层理 相交作用准则 真三维模拟 吉木萨尔 

分 类 号：TE357[石油与天然气工程—油气田开发工程]