煤质技术2024，Vol.39Issue(2)：53-60,8.DOI:10.3969/j.issn.1007-7677.2024.02.005
基于分段压裂水平井的临兴区块煤层气开发数值模拟
Numerical simulation of coalbed methane development in Linxing block based on segmented fractured horizontal wells
摘要
Abstract
As an important part of unconventional natural gas,coalbed methane(CBM)has garnered considerable attention for its efficient development technology.Horizontal well staged fracturing technology is one of the key tech-nologies in the current development of unconventional natural gas.Consequently,it is necessary to conduct numerical simulations on block CBM development based on staged fracturing horizontal wells,in order to improve the develop-ment effect of CBM and achieve process optimization.Based on a fluid-solid coupling mathematical model of CBM de-velopment,accounting for the distribution of cleat systems in coal reservoirs,taking the Linxing block as the research object,a physical model of horizontal well staged fracturing was established to perform numerical simulations of CBM reservoir pressure and productivity.The simulations analyzed changes in coal seam pressure and factors influen-cing gas production.The results show that the staged fracturing of horizontal wells for CBM development can achieve remote area control within about 365 days,with relatively stable well pressure.Increasing the number of cleats and fracture parameters can improve the gas production effect of CBM,but the development cost of horizontal well staged fracturing technology and the impact of factors such as inter-well interference need to be considered.The numerical simulation model of block CBM development based on staged fracturing horizontal wells can provide reference and guidance for the staged fracturing technology of horizontal wells to achieve efficient development of CBM.关键词
煤层气/水平井分段压裂/数值模拟/裂缝参数/储层压力/割理条数/产气效果Key words
coalbed methane/horizontal well staged fracturing/numerical simulation/fracture parameters/reser-voir pressure/number of cleats/gas production effect分类
石油、天然气工程引用本文复制引用
王小东,张守仁,吴见,梁渝,刘世奇,皇凡生..基于分段压裂水平井的临兴区块煤层气开发数值模拟[J].煤质技术,2024,39(2):53-60,8.基金项目
国家自然科学基金资助项目(41972168,42030810) （41972168,42030810）
