煤层气含气量测定影响因素分析  

Analysis of Factors Influencing Measurement of Gas Content

作　　者：曾凡武[1] 薛晓辉[1] 

机构地区：[1]中国石化华东分公司石油勘探开发研究院,江苏225007

出　　处：《中国煤层气》2012年第3期24-26,12,共4页China Coalbed Methane

摘　　要：按照《GB/T 19559-2008煤层气含量测定方法》对鄂尔多斯盆地东南缘的延川南区块内主采煤层的煤样进行含气量的测试。以不同的损失时间对含气量的测定值作图,发现煤样的总含气量随着损失时间的延长而减小;分别以同一解吸温度和不同的解吸温度得到的数据做线性回归图,通过两张图中直线斜率的对比,发现煤样的总含气量随着解吸温度的减小而减小;建议采集损失时间较少的煤样按照储层温度来恒温解吸,减小其在煤层气含气量测试中产生的误差,提高测试数据的准确性。In accordance with ＂GB/T 19559- 2008 CBM Gas Content Measurement Method＂ the authors made gas content tests on coal samples taken from major coal seams in Yanchuan south block in south - eastern fringe of Ordos Basin. A plot was made according to the measured values of gas contents on the basis of differ- ent lost times. It was found that the total gas contents of coal samples decreased with extension of lost time. Straight line regression plots were drawn respectively based on data obtained under the same desorption temper- ature and different temperatures. Based on comparison of the straight line slopes in two plots, it was found that the total gas contents dropped with decrease of the adsorption temperature. It is suggested to collect coal sam- pies with less lost time and make desorption test under constant temperature determined by that of the reser- voir, so as to reduce the errors produced in CBM gas content test in order to improve the accuracy of the mea- sured data.

关 键 词：延川南区块 煤层气 含气量 影响因素 损失时间 解吸温度 

分 类 号：TD84[矿业工程—煤矿开采]