煤储层夹层水侵量和控制储量的计算方法  

Calculation of water influx in interlayer of coal reservoir and controlled CBM reserves

作　　者：黄子俊[1] 冯青[1] 王涛[1] 田苗[1] 狄桂荣 高杰[1] 

机构地区：[1]中海油田服务股份有限公司油田生产研究院,天津300450

出　　处：《煤田地质与勘探》2017年第4期52-55,共4页Coal Geology & Exploration

摘　　要：煤层气藏渗流机理不同于常规气藏,产气量受到煤层解吸压力及吸附特性的影响,计算单井控制储量难度较大;同时,部分煤层气井受到储层压裂或断层沟通边底水及夹层水的影响,排采初期产水量高,且产水期长,呈现明显的水侵特征。为了评价煤层气井的产能及水侵程度,通过大量文献调研发现,目前对高产水的生产井研究较少。在前人的研究基础上,引入视地质储量法和生产指示曲线法,建立适应外来水侵的煤层气井生产模型,考虑储层的非常规特性,利用少量的生产资料计算水侵量和单井控制储量,为煤层气开采提供重要气藏参数。研究结果表明:视地质储量法和生产指示曲线法所需资料简单,2种方法计算出来的控制储量基本吻合,水侵量能够真实反映生产井的水侵特征,对煤层气的开发具有重要的指导意义。The percolation mechanism of CBM reservoir differs from conventional ones, and its production is affected by desorption pressure and adsorption characteristics, it is difficult to calculate the controlled reserves of single well; because edge-bottom water or interbedded water are connected by fractures or faults, some wells have high water yield and long drainage period in initial production, show obvious water invasion characteristics. In order to assess the productivity and water invasion of CBM wells, through investigation of massive papers, this paper finds that there are few studies on calculating controlled reserves and water influx of single well. The paper innovatively uses a few of simple field data to calculate water influx of CBM wells and controlled reserves of single well, considers non-conventional features of reservoir and establishes corresponding production model by the method of pseudo geo-logical reserves and production instruction curves. The result proves that this study performs effectively, approaches true reservoirs by two ways, and it is of great significance to instruct exploitation of CBM wells.

关 键 词：煤层气井 解吸-吸附 水侵 单井控制储量 

分 类 号：TD712.62[矿业工程—矿井通风与安全]