考虑温压效应的裂缝扩展模型及其在分布式光纤测温中的应用  

A thermal-pressure coupling fracture propagation model and its application in DTS

作　　者：沈安琪[1] 王亮皓 魏建光[1] 刘义坤[1] 李玮[1] 梁爽[1] 王凤娇[1] 姜亮亮[2] SHEN Anqi;WANG Lianghao;WEI Jianguang;LIU Yikun;LI Wei;LIANG Shuang;WANG Fengjiao;JIANG Liangliang(National Key Laboratory of Continental Shale Oil,Northeast Petroleum University,Daqing 163318,China;School of Chemical Engineering and Petroleum Engineering in University of Calgary,Calgary T2N1N4,Canada)

机构地区：[1]东北石油大学多资源协同陆相页岩油绿色开采全国重点实验室,黑龙江大庆163318 [2]卡尔加里大学化学工程与石油工程学院,加拿大卡尔加里T2N1N4

出　　处：《中国石油大学学报(自然科学版)》2025年第2期167-174,共8页Journal of China University of Petroleum(Edition of Natural Science)

基　　金：国家自然科学基金项目(52074087)。

摘　　要：通过对井筒、裂缝与储层3部分的流动和传热模型耦合求解,得到温度影响下的压裂施工裂缝参数与井筒温度分布,求解过程中考虑温压效应对流体物性(密度、体积)的影响。结果表明:当滤失系数为0.21×10^(-5)m/s 0.5时,泵注开始后的150 min内,考虑温压效应与未考虑温压效应计算得到的裂缝半长最大差值可达46.64 m;分布式光纤测温(DTS)传感器位置对测试结果影响较大,通过温度模拟结果与实测DTS数据对比,可判断出DTS传感器安装位置。This study proposed a coupled modeling framework integrating flow and heat transfer processes in the wellbore,fractures and reservoir which was capable of calculation for fracture parameters and wellbore temperature distribution.The model explicitly accounted for thermal-pressure coupling effects on fluid properties(density and compressibility).Simulation results demonstrate that under a leak-off coefficient of 0.21×10^(-5)m/s 0.5,the maximum discrepancy in fracture half-length between models with and without thermal-pressure coupling reaches 46.64 m during the initial 150 min of pumping.Furthermore,the sensitivity analysis reveals that the positioning of distributed optical fiber temperature sensor(DTS)significantly affects measurement accuracy.By correlating simulated temperature profiles with field DTS data,the relative installation position of DTS sensors can be quantitatively determined.

关 键 词：裂缝扩展模型 裂缝温度场模型 温压效应 分布式光纤测温 

分 类 号：TE357[石油与天然气工程—油气田开发工程]