水力压裂裂缝及近缝储层温度场  

FRACTURES AND TEMPERATURE FIELDS FOR THE RESERVOIR NEAR THE FRACTURES DURING THE HYDRAULIC FRACTURING

作　　者：王强[1] 胡永全[1] 任岚[1] 赵金洲[1] WANG Qiang;HU Yongquan;REN Lan;ZHAO Jinzhou(State Key Laboratory of Oil-gas Reservoir Geology ＆ Exploitation, Southwest Petroleum University, Chengdu 610500, China)

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《大庆石油地质与开发》2018年第1期98-102,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家自然科学基金重大项目"页岩气动态随机裂缝控制与无水压裂液研究"(51490653)

摘　　要：为了精确预测水力压裂过程中裂缝及近缝储层温度分布,对经典裂缝及近缝储层温度场模型进行了改进。加入了两相渗流场,利用达西定律建立新的滤失模型,改变了滤失速度仅为时间函数的局限性,不再使用原有裂缝扩展模型,改用耦合渗流场的裂缝延伸模型,然后使用有限差分方法、迭代法对新模型进行了求解,并与经典温度场模型求解结果进行了对比。研究表明,压裂初期温度变化较快,对压裂液性能要求较高,滤失模型和裂缝模型的改变对温度场的影响较大。新模型更符合压裂实际环境要求,可为现场操作和技术研究提供可靠依据。In order to accurately predict the temperature distributions of the fracture and its adjacent reservoir during the hydraulic fracturing,the classic temperature field model of the crack and nearby reservoir was improved：joined the two-phase flow field; established a new filtrating model with the help of Darcy＇s Law; changed the limitation that the filtration rate is only a function of the time; replaced the original crack propagating model and changed to use the extended crack model of the coupled seepage field. And then by means of the finite difference method and the iterative method,the new model was solved and moreover compared with the results of the classic temperature field model. The results show that the temperature changes rapidly in the early stage of the fracturing,the requirements to the fracturing fluid performances are rather higher,the changes of the filtrating and fracture models have a great influence on the temperature field. The new model is more in line with the requirements of the actual situation of the fracturing,so it can provides more reliable evidences for the field operation and technical researches.

关 键 词：水力压裂 裂缝 温度场 模型 

分 类 号：TE357[石油与天然气工程—油气田开发工程]