煤储层原位含气量测试分析：以淮南潘集深部煤层为例

Analysis of Gas Content Testing in Coal Reservoirs: Taking the Deep Coal Seam of Panji Mining Area in Huainan Coalfield as an Example

摘要: 为对比不同方法对于煤层含气量测试数值的差异，以淮南潘集深部煤层为研究对象，采用直接法和间接法对含气量进行计算。结果表明：由于损失气量计算方法不同，采用直接法测定的煤储层含气量结果存在差异。而损失气量的误差主要来源于煤样暴露时间。采用间接法对煤样推算出的煤储层含气量更接近实际煤储层含气量。从数值上来看，采用直接法计算的结果相比间接法结果偏小，而间接法可以避免估算煤层气损失量，可为煤储层含气量的计算提供一种新思路。

Abstract: In order to compare the differences in gas content testing values of coal seams by using different methods, the deep coal seams of Panji mining area of Huainan Coalfield were taken as the research objects, the gas content was calculated using direct and indirect methods. The results indicate that due to different calculation methods for the lost gas content, there are differences in the gas content results of coal reservoirs measured using direct methods. The error in lost gas content mainly comes from the exposure time of the coal sample. The indirect method is used to calculate the gas content of coal reservoirs, which is closer to the actual situation. From a numerical perspective, the results obtained by using the direct method are smaller than those obtained by the indirect method. However, the indirect method can avoid estimating the lost gas content, and provide a new approach for calculating the gas content of coal seams.