潘庄区块煤层气井层间干扰数值模拟研究  

Study on Numerical Simulation of Interferences Between Stratum Interfaces of Coal Bed Methane Well in Panzhuang Block

作　　者：姚帅[1,2] 吴财芳[1,2] 李腾[1,2] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221008 [2]中国矿业大学煤层气资源与成藏过程教育部重点实验室,江苏徐州221008

出　　处：《煤炭工程》2014年第3期80-83,共4页Coal Engineering

基　　金：国家科技重大专项(2011ZX05034);国家重点基础研究发展计划(973计划)资助项目(2009CB219605);国家自然科学基金项目(41272178)

摘　　要：以沁水盆地南部潘庄区块W01井为研究对象,运用Comet3数值模拟软件拟合了3#、15#煤层的实际排采数据,反演了煤储层的渗透率、含气量等煤储层参数,引入干扰系数的概念,采用控制单一变量的方法,讨论了储层参数对层间干扰系数的敏感性,并通过模拟单采、合采条件下煤层气产量及储层压力的变化,探讨了煤层气井排采过程中层间干扰的形成机制。研究表明:合层排采时,层间干扰程度随着煤层气井开发呈现先减小后增大再减小的特点;渗透率、孔隙度、朗氏体积是层间干扰的主要影响因素,原始储层压力的影响较小。Based on No. W01 well in Panzhuang Block of Qinshui Basin as a study object, a Comet3 numerical simulation software was applied to fit the actual drainage data of No. 3 and No. 5 seams and inverse the penetration rate, gas content and other parameters of the coal seam. With the introduction of the interference coefficient conception, a single variation control method was applied to discuss the coal seam parameters affected to the sensitivity of the interference coefficients between seams. With the simulation on the variations of the coal bed methane production and the seam pressure under the signal seam mining and the combined mining, the paper discussed the formation mechanism of the interferences between the seams during the coal drainage process of the coal bed methane well. The study showed that during the multi seam combined drainage, the interference degree would be firstly decreased, then increased and late decreased with the development of the coal bed methane well. The penetration rate, porosity and Langmuir volume were the main influence factors of the interferences between the seams. The in- situ reservoir pressure would have less influence to the interferences.

关 键 词：煤层气 层间干扰 数值模拟 形成机制 控制因素 

分 类 号：TD84[矿业工程—煤矿开采]