焦作煤田煤层气资源评价及市场前景分析

介绍了焦作煤田地质和构造特征,说明焦作煤田属华北石炭-二叠系煤层,含煤11～14层,主要可采煤层为二叠系山西组二1煤和石炭系太原组一1煤,焦作煤田按其展布方向分为近东西向、北东向和北西向3组。分析了焦作煤田煤层赋存特征、煤层含气特征及煤层气资源量,说明焦作煤田二1煤属高品质无烟煤,煤层厚度0.71～11.32 m,平均5.13 m,结构简单,一般不含夹矸,局部含1～2层夹矸;二1煤层含气量0.82～38.75 m3/t,平均16.31 m3/t,煤层含气量有随埋藏深度增加而增高的趋势,属高品质煤层气;运用体积法估算焦作煤田二1煤煤层气地质储量约为843.40亿m3。最后从焦作煤田发展煤层气产业的地理条件、资源条件和市场条件等方面对煤层气开发市场前景进行了分析,说明焦作煤田煤层气具有广阔的市场前景。

Appraisal of coaibed methane resources in Jiaozuo coalfield

Coal field geology and structural characteristics of Jiaozuo coalfield show evidence that the coal seams of Jiaozuo coalfield is part of Carboniferous-Permian coal seams in North China, the number of coalseam ranges from 11 to 14 in this area and the main minable seams are seam 1I 1 of Shanxi Formation （ P1 s） and seam I, of Taiyuan Formation（C3t）. The fault structure is divided into three groups, nearly east-west, north-east and north-west, according to its structure distribution. The coal in Jiaozuo coalfield is anthracite with high quality, the thickness is between 0. 71 m and 11.32 m with simple structure. The average thickness is 5.13 m. In general,there are no interband seam,in some special areas there may be one or two interband seams. Coal seam I] 1 is the target seam with higher gas content,which ranges from 0. 82 mz per ton to 38.75 m3 per ton. The average content is 16. 31 m3 per ton. The gas content tends to rise with the increase of coal buried depth. The geological reserves of coal bed methane of seam 111 is about 84.34 billion m3 calculated using volumetric method. The geographical, resource, market conditions of Jiaozuo coalfield are well proof that this coalfield has broad market prospects.