摘要
煤层气压裂过程中注入压力的波动造成煤层渗透率发生动态变化,研究高阶煤层渗透率动态变化对压裂施工时压裂液效率定量评价有重要意义。利用GCTS-RTR-1000型电液伺服三轴试验机和HPPD-20脉冲衰减测瞬态渗透率仪,针对高阶煤试样在三轴压缩过程中的应力渗流耦合实验,通过在低围压条件下轴向应力-体积应变-渗透率测定实验进行实验数据分析研究,揭示了三轴压缩过程中高阶煤煤岩渗透率变化规律。
The fluctuation of injection pressure caused the dynamic change of coal seam permeability during the fracturing process of coalbed methane. It is important to study the dynamic change of permeability of high rank coal seam for quantitative evaluation of fracturing fluid efficiency during fracturing.Using a GCTS-RTR-1000 electro-hydraulic servo testing machine and HPPD-20 three axis pulse attenuation measuring instrument for transient permeability, stress seepage coupling experiments should be of high rank in the sample of three axis compression, through under low confining pressure conditions, axial stress and volumetric strain permeability measured experimental data analysis, reveals the law of high coal coal permeability change process of three axis compression.
作者
张登文
余东合
车航
刘国华
朱杰
李建召
王政国
ZHANG Deng-wen;YU Dong-he;CHE Hang;LIU Guo-hua;ZHU Jie;LI Jian-zhao;WANG Zheng-guo(Engineering Technology Research Institute, Huabei Oilfield Corporation, CNPC, Renqiu 062552, China;Coalbed Methane Pilot Base,CNPC, Renqiu 062552, China;Oil Production Plant 1 of Huabei Oilfie]d, CNPC, Renqiu 062552, China;Oil Production Plant 3 of Huabei Oilfield, CNPC, Renqiu 062552, China)
出处
《煤炭技术》
CAS
2018年第5期181-183,共3页
Coal Technology
基金
中国石油天然气股份有限公司重大科技专项(2014E-35-08-03)
中国石油华北油田分公司科技项目(2016-HB-M02
2017-HB-M11)
关键词
高阶煤
低围压
有效应力
动态渗透率
体积应变
压缩系数
综合滤失系数
压裂液效率
high rank coal
low confined pressure
effective stress
dynamic permeability
volumetric strain
coefficient of compressibility
total filtration coefficient
fracturing fluid efficiency
