单井间歇注气开采煤层气生产过程分析  

Production Procession Analysis of Coalbed Methane by Intermittent Gas Injection into Single-well

作　　者：吴世跃[1] 张美红[1] 郭勇义[2] 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]太原科技大学,山西太原030024

出　　处：《太原理工大学学报》2008年第2期148-150,共3页Journal of Taiyuan University of Technology

基　　金：山西省攻关项目(2007031120-02);科技部支撑计划(2007BAK29B01)

摘　　要：描述了注气开采煤层气生产过程,分析表明间歇注气生产模式的增产机理主要是竞争吸附置换,而边注边采生产模式主要是驱替;反映基质孔隙扩散能力的综合传质系数不仅影响煤层气井的生产能力,而且影响矿井煤与瓦斯的突出;建立了单井间隙式注气开采煤层气的扩散渗流数学微分方程组;注气过程和采气过程渗流方程式形式相同,但质量源的流向不同,生产井内的边界条件不同。This thesis describes the production process of coalbed methane production by gas injection. Analysis indicates that the mechanism of intermittent gas injection production mode to increase output is mainly binging domino of competition adsorption, while that of injection and production mode is mainly displacement. The comprehensive mass transfer coefficient that reflects the diffusion of matrix pore space not only affects the capacity of coalbed methane well, but also outburst of coal and gas in mine. The thesis sets up system of differential equations of diffusion and permeation for coalbed methane production by intermittent gas injection into single-well. The procession of gas injection and production share the same equation form, but are different in flow direction of mass source and boundary conditions within the production well.

关 键 词：煤层气 注气 竞争吸附 驱替 边界条件 

分 类 号：TD712.61[矿业工程—矿井通风与安全] TE377[石油与天然气工程—油气田开发工程]