摘要
建立了考虑气体吸附、解吸引起的煤基质孔隙变形与孔隙气体压力耦合作用的煤层气藏渗流数学模型,并建立了考虑火成岩和断层构造的地质模型,对阜新刘家低煤阶煤层气区块群井排采进行了仿真分析。模拟结果表明:复杂地质条件煤层气藏储层压力的扩展受地质构造的影响;采用临界解吸压力评价压力扩展,端割理、面割理相同时,临界解吸压力圈面积和产量均比端割理、面割理不同时大,在数值模拟中必须考虑端割理、面割理方向渗透率的差异性。通过不同井型条件下压力和产量的对比,复杂地质条件的刘家区块中,采用不规则四边形井网最能利用地质因素的有利影响,产能最高。
Coal-bed Methane reservoir mathematical model considering the coupling of matrix pore deformation and pore pressure during gas adsorption and desorption was established,Coal-bed Methane reservoir geologic model with igneous rocks and faults was established,Liujia low coal rank Coal-bed Methane block with multi-well exploitation was simulated.Simulation results show： pressure distribution of complexly geological CBM reservoir is influenced by geological structure.Critical desorption pressure was used to value pressure distribution,when the permeability of face cleat is identical with butt cleat,critical desorption pressure area and the output are larger,the differences of permeability between face cleat and butt cleat must be considered in the numerical simulation.Through the contrast of production under different well patterns in complicatedly geologic Coal-bed Methane reservoir,irregular quadrilateral well pattern can make use of the beneficial effects of geological factors most,capacity of this well pattern is the highest.
出处
《工程力学》
EI
CSCD
北大核心
2012年第10期359-365,共7页
Engineering Mechanics
基金
国家重点基础研究发展计划(973计划)项目(2011CB201206
2005CB221503-02)
国家自然科学基金青年科学基金项目(50904033)
辽宁省自然科学基金项目(20102090)
