山西南部上古生界煤层含气性研究 Ⅰ推定区煤层含气性评价

THE STUDIES ON GAS BEARING CHARACTERISRICS OF THE UPPER PALEOZOIC COAL SEAMS IN THE SOUTHERN SHANXI,CHINA I GAS BEARING SEAMS IN THE INDICATED AREAS

山西南部上古生界主煤层含气量具有南高北低、东高西低、东南部最高的区域展布格局，并显示出“层控”特征；含气量与煤级及灰分产率密切相关。主煤层的平均含气性可划分为三类六型，富甲烷煤层和含甲烷煤层主要分布于东南部推定区以及盆地深部的推断—预测区，具有进一步开展评价的价值。

The gas in the Upper Paleozoic main coal seams of the southem Shanxi is relatively rich in the southern and eastern indicated areas relatively poor in the northern and wesern areas and richest in the southeastern area,and its distribution seems to be controlled by the seam horizons。The gas contents are showed as the functions of the coal rank and ash yield。Based upon the gas—bearing characteristics,the main seams could be classified into three categories including six types,in which the rich—gas and bearing —gas seams occur mainly in the southern indicated areas and the deep referred predicted areas,where the further evaluation of the CBM resources would be valuable。