深层页岩气藏带温度场水力压裂模型构建与仿真研究  

Construction and Simulation of Hydraulic Fracturing Model withTemperature Field in Deep Shale Gas Reservoirs

作　　者：邹龙庆 何昀宾 鄂玄吉 卢汉 ZOU Longqing;HE Yunbin;E Xuanji;LU Han(CNPC Chuanqing Drilling Engineering Company Limited,Chengdu 610051;China Petroleum Technical Service Corporation Limited,Beijing 100007;Petroleum Engineering School,Southwest Petroleum University,Chengdu 610500;School of Mathematics,Sichuan University,Chengdu 610065)

机构地区：[1]中国石油集团川庆钻探工程有限公司,成都610051 [2]中国石油集团油田技术服务有限公司,北京100007 [3]西南石油大学石油与天然气工程学院,成都610500 [4]四川大学数学学院,成都610065

出　　处：《工程数学学报》2025年第1期114-126,共13页Chinese Journal of Engineering Mathematics

基　　金：中国石油天然气集团有限公司科学研究与技术开发项目(2021DJ7401)。

摘　　要：深层页岩气藏具有高温高压的地质特征,常规的流固耦合压裂模型并不能描述温度场对裂缝扩展的影响。基于一定的合理假设,构建了一个全三维热流固耦合水力压裂模型,用来描述深层页岩气藏水力裂缝扩展过程。通过有限体积离散与隐式时间离散完成数值实验,表明了温度对水力裂缝扩展影响显著。根据数值仿真实验结果可知:考虑温度场的裂缝模型相比常规模型更难以起裂,具有更大的压裂难度;更高的井底温度使裂缝更难扩展,高温环境和常温环境缝长差异显著;热膨胀系数越大,井底温度对裂缝扩展影响越显著。The deep shale gas reservoir has the geological characteristics of high temperatureand high pressure,and the conventional fluid-structure coupling fracturing model cannot describethe effect of temperature field on fracture propagation.In this paper,based on somereasonable assumptions,a full three-dimensional thermo-fluid-solid coupling hydraulic fracturingmodel is constructed to describe the hydraulic fracture propagation process of deep shalegas reservoirs.Numerical experiments with finite volume discretization and implicit time discretizationshow that temperature has a significant effect on hydraulic fracture propagation.According to the results of numerical simulation experiments,the following conclusions aredrawn:Compared with the conventional model,the fracture model considering temperaturefield is more difficult to crack and has greater fracturing difficulty;Higher bottom hole temperaturemakes it more difficult for fractures to expand,and there is a significant difference infracture length between high temperature environment and normal temperature environment;The larger the coefficient of thermal expansion,the more significant the effect of bottom holetemperature on fracture propagation.

关 键 词：三维水力压裂 热流固耦合 深层页岩气藏 裂缝扩展仿真 

分 类 号：TE32[石油与天然气工程—油气田开发工程]