低煤阶煤层气藏水文地质条件的物理模拟  

Hydro-geological condition physical simulation of the low rank coalbed methane reservoir formation

作　　者：王勃[1] 姜波[1] 王红岩[2] 陈振宏[3] 刘洪林[2] 李贵中[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]石油勘探开发研究院廊坊分院,河北廊坊065007 [3]石油勘探开发研究院实验研究中心,北京100083

出　　处：《煤炭学报》2007年第3期258-260,共3页Journal of China Coal Society

基　　金：国家重点基础研究规划"973"基金资助项目(2002CB211705)

摘　　要：采集低煤阶煤岩样品,利用煤层气成藏模拟装置模拟了低煤阶煤层气藏的水文地质条件,探讨了动力条件及地下水化学特征对煤层气保存、富集及成藏的影响.结果表明:强烈的水动力交替作用使煤层气藏中的甲烷碳同位素变轻,甲烷含量降低,N2和CO2含量增大,这对煤层气成藏不利;低煤阶褐煤倾向于低矿化度,有利于生物气的生成和低煤阶煤层气的富集成藏.Using the CBM reservoir simulation system and collecting the low rank coal samples,the main hydro-geological condition of low rank CBM was simulated,and two critical factors were discussed,including hydrodynamic characters and geochemistry character of groundwater.It indicates that δ13C is lightened,the CBM content is reduced,and N2 and CO2 contents are increased under the strong hydrodynamic alternation,which affected disadvantageously CBM reservoir formation.To the low rank lignite,the groundwater salinit...

关 键 词：低煤阶 煤层气 水文地质 矿化度 物理模拟 

分 类 号：P641.461[天文地球—地质矿产勘探]