沁水煤田煤层含气量校正系数研究

Research on Correction Coefficient of Gas Content in Coal Seams of Qinshui Coalfield

为了提高沁水煤田煤层气资源/储量预测准确程度,在对比分析我国上世纪煤田地质勘探解吸法和近期煤层气勘探美国矿业局直接法实测含气量差异的基础上,利用梯度法获得了将晋城、潞安、阳泉矿区主采煤层解吸法实测含气量校正为直接法含气量的系数,探讨了含气量校正系数与煤层埋深、煤级的关系。研究成果提高了解吸法实测煤层含气量数据的可靠程度,有助于沁水煤田煤层气资源/储量评价。

In order to improve the estimation accuracy of coalbed methane resources/reserves in Qinshui Coalfield,the paper changed the measured gas content obtained by desorption method to the gas content obtained by direct method in the major mining coal seams using a coefficient acquired by the method of gradient in Jincheng,Lu＇an and Yangquan mining areas,based on the comparative analysis of the difference of measured gas content using the desorption method of coalfield geological exploration of last century in China and the direct method of recent coalbed methane exploration of United States Bureau of Mines.The paper also discusses the relationship between the correction coefficient of gas content and the burial depth of coal seam and coal rank.The result has improved the reliability of the gas content obtained by desorption method,which will be helpful to the evaluation of coalbed methane resources/reserves in Qinshui Coalfield.