摘要
湘西北页岩气储层致密,具有低孔、低渗等特点,需要对储层进行压裂改造,而携砂液的携砂能力实验,对其性能进行了研究。研究表明:携砂液属于假塑性流体,SDBS浓度为0.03%时,其流性指数最小,稠度系数最大,而且结构粘度相对其流阻比值最大,适合于湘西北页岩储层压裂改造;携砂液粘弹性携砂能力与其结构粘度有关,而且结构粘度(ηs)与沉降速率(v)满足v=-0.016ηs+2.304。
Shale gas reservoirs in the northwestern Hunan are dense, with low porosity and low permeability, and it is necessary to fracture the reservoir. The proppant-carrying capacity of the fracture fluid is the key to successful fracturing. In view of the characteristics of shale gas reservoirs in northwestern Hunan, the rheological properties and viscoelastic sand-carrying experiments were conducted to optimize the concentration of SDBS used as the main sand-carrying medium. The results show that the proppant-carrying fluid belongs to pseudo plastic fluids. When the concentration of SDBS is 0.03%, it provides the smallest fluidity index, the largest consistency coefficient, and the largest ratio of the structural viscosity/the flow resistance, and is ideal for the shale reservoir fracturing in the northwestern Hunan. The viscoelastic sand carrying capacity of the proppant-carrying liquid is related to its structural viscosity, and the structural viscosity （ηs） and precipitation rate （v） satisfy v=-0.016ηs ＋2.304.
作者
张政
曹函
王天一
倪准林
ZHANG Zheng1,2, CAO Han1,2,3, WANG Tian-yi1,2, NI Zhun-lin1,2(1.Key Laboratory of Metallogenic Predic- tion of Nonferrous Metals and Geological Environment Monitoring, Ministry of Education, Changsha Hunan 410083, China; 2.School of Geoscience and Info-Physics, Central South University, Changsha Hunan 410083, China; 3.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu Sichun 610500, China)
出处
《探矿工程（岩土钻掘工程）》
2018年第10期83-86,共4页
Exploration Engineering:Rock & Soil Drilling and Tunneling
基金
国家自然科学基金项目"含煤层气储层物性与压裂液微观特性动态耦合作用机理研究"(编号:41302124)
"油气藏地质及开发工程"国家重点实验室开放基金项目"多尺度下页岩气储层脉冲水力压裂造缝时空效应研究"(编号:PLN201607)
关键词
湘西北页岩储层
携砂液
结构粘度
粘弹性携砂
shale reservoir in the north-western Hunan
proppant-carrying fluid
structural viscosity
viscoelastic carrying
