页岩气水平井暂堵坐封机制与可控暂堵压裂工艺  

Temporary plugging setting mechanism and controllable temporary plugging fracturing technology of shale gas horizontal wells

作　　者：李绍鹏 李常兴 周鹏 蓝宝锋 蔡灿[4] 钟涛 LI Shaopeng;LI Changxing;ZHOU Peng;LAN Baofeng;CAI Can;ZHONG Tao(Unconventional Gas Research Institute,Guizhou Energy Industry Research Institute Co.,Ltd.,Guiyang 550009,China;Engineering Technology Department,Guizhou Shale Gas Exploration and Development Co.,Ltd.,Zheng′an 563400,China;College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China;College of Mechanical and Electrical Engineering,Southwest Petroleum University,Chengdu 610500,China;Shale Gas Production Technique Service Company,Jianghan Petroleum Engineering Co.,Ltd.,SINOPEC,Wuhan 430074,China)

机构地区：[1]贵州能源产业研究院有限公司非常规天然气研究所,贵州贵阳550009 [2]贵州页岩气勘探开发有限责任公司工程技术部,贵州正安563400 [3]贵州大学资源与环境工程学院,贵州贵阳550025 [4]西南石油大学机电工程学院,四川成都610500 [5]中国石化江汉石油工程有限公司页岩气开采技术服务公司,湖北武汉430074

出　　处：《断块油气田》2024年第3期432-438,共7页Fault-Block Oil & Gas Field

基　　金：贵州省找矿突破战略行动重大协同创新项目“贵州省页岩气效益开发关键技术及工程试验”(黔科合战略找矿[2022]ZD005);贵州省科技计划项目“复杂构造区页岩气水平井压裂工艺研究”(黔科合支撑[2022]一般230);“贵州凤冈地区五峰组页岩气富集成藏条件研究”(黔科合支撑[2023]一般344)。

摘　　要：水平井暂堵转向压裂技术是页岩气增产的关键技术之一。文中采用流体动力学软件FLUENT与离散元方法(DEM)相结合的数值建模方法,研究了水平井暂堵转向压裂技术中暂堵球在井筒中的运移规律以及颗粒间的相互作用。通过建立DEM-DDPM耦合模型发现,施工排量、暂堵球密度、暂堵球直径和压裂液黏度是影响暂堵球坐封效果的主要因素。模拟结果表明:当施工排量在4~6 m^(3)/min时,暂堵球的密度小于或等于流体密度;射孔炮眼磨蚀率在6.15%以内可以有效提高封堵效率;同时,随着压裂液黏度的增加,封堵效率先升后降。该研究结果对于优化水平井压裂暂堵球用量以及施工工艺具有重要的理论意义和指导价值。Temporary plugging diversion fracturing technology in horizontal wells is one of the key technologies to increase shale gas production.This paper uses the numerical modeling method that combines the fluid dynamics software(FLUENT)and the Discrete Element Method(DEM)to investigate the migration rules of temporary plugging balls in the wellbore and the interaction of particles in the temporary plugging diversion fracturing technology in horizontal wells.It was found through establishing the DEM-DDPM coupling model that construction displacement,plugging ball density and diameter,and fracturing fluid viscosity are the major factors affecting the successful setting of temporary plugging balls.The simulation results indicate that when the construction displacement is between 4 and 6 m^(3)/min,the density of the plugging ball is less or equal to that of the fluid,and when the erosion rate of perforation holes is within 6.15%,it can effectively improve the plugging efficiency.Meanwhile,as the viscosity of the fracturing fluid increases,the plugging efficiency first rises then falls.This research offers significant theoretical and practical guiding values for optimizing the volume of temporary plugging balls used in horizontal well fracturing and for optimizing the construction technology.

关 键 词：暂堵转向压裂 暂堵球 运移 DEM-DDPM耦合 坐封 

分 类 号：TE357[石油与天然气工程—油气田开发工程]