煤层气藏多层合采的影响因素分析  

Analysis of Factors Influencing Co-production of Multi-seam in CBM Reservoir

作　　者：邵长金[1] 邢立坤[1] 李相方[2] 温声明 胡爱梅 

机构地区：[1]中国石油大学理学院,北京102249 [2]中国石油大学石油工程学院,北京102249 [3]中石油煤层气有限责任公司,北京100028

出　　处：《中国煤层气》2012年第3期8-12,共5页China Coalbed Methane

基　　金：国家"973"重点基础研究发展计划项目(2009CB219606);国家重大专项课题(2011ZX05038-4)

摘　　要：针对煤层气藏多层合采井的一般模型,利用CMG软件对多层合采时地层系数、初始地层压力、初始含气饱和度以及解吸特性等因素的敏感性进行了分析,结果表明:各分层的渗透率、初始地层压力、初始含气饱和度对合采的产能有重要影响,决定了合采的合理性,而分层厚度、解吸特性对合采的影响较小。在此基础上,对H地区煤层气藏多层合采实例进行分析,当3#和5#层合采时,因两层渗透率、初始地层压力等差别小,合采效果好;当3#、11#合采时,因渗透率相差太大而导致合采效果差,表明煤层气合采具有一定的适应性。Using CMG software in a general model for co - mining of a multi-seam reservoir, the paper analy- ses the sensitivity of a number of factors in co-mining of a multiple of seams, such as strata coefficient, initial ground pressure, initial gas-bearing saturation and desorption performance, etc. The results indicate that the permeability, initial ground pressure, initial gas-bearing saturation of all the layers have an important bearing on production capacity of co-mining, which determines the reasonableness of co-mining. However, the thick- ness, desorption performance have less influence on co-mining. Based on this, the authors study an example of co-mining of a multi-seam reservoir in H area. When Nos.3 and 5 seams are co-mined, the differences of per- meability, initial ground pressure of these two seams are small, and results of co-mining are good. When Nos. 3 and 11 are co-mined, the differences of permeability of these two seams are great, and the results of co- mining are not good. This means that co- mining has its scope of application.

关 键 词：多层合采 产能 渗透率 初始含气饱和度 

分 类 号：TE37[石油与天然气工程—油气田开发工程]