煤田地质与勘探Issue(3)：28-32,5.DOI:10.3969/j.issn.1001-1986.2015.03.006
珲春盆地低煤阶煤层气富集规律
Low rank enrichment of coalbed methane in Hunchun basin
摘要
Abstract
To obtain the industrial breakthrough of coalbed methane in Hunchun basin hasgreat significance for the exploration of coalbed methane(CBM) in China’s low rank coal basins. Through the deepened analysis on the res-ervoir-forming conditions of coalbed methane of low rank coal in Hunchun basin, the paper discussed the major controlling factors of CBM enrichment of low rank coal and its reservoir-forming model. The results show that Hunchun basin is characterized by low coal rank, multiple and thin seams. There are three main control factors for CBM accumulation, including tectonic setting, sedimentary characteristics and magmatic rock intrusion. The area with faults and folds in the west of the basin has not only created the favorable environments for biogas, but also provided the place for secondary reservoir forming, eventually forming the gas enrichment model of "continuous fold". The vertical superimposition of microfacies of marshes and natural levee which made mudstone and dense sandstone as the direct roof and floor of coal seams have better sealing effect for CBM, local diabase intrusion inside coal seams made again hydrocarbon to be generated, and greatly improved the physical properties of coal. Therefore, the west of Hunchun basin is an area rich in CBM and has a great potential for exploration and development.关键词
珲春盆地/低煤阶/成藏条件/富集规律Key words
Hunchun basin/low rank coal/reservoir-forming conditions/enrichment law分类
天文与地球科学引用本文复制引用
王有智..珲春盆地低煤阶煤层气富集规律[J].煤田地质与勘探,2015,(3):28-32,5.基金项目
中石油科技攻关项目(2010E-2201；2012E-2603) （2010E-2201；2012E-2603）
