煤田地质与勘探Issue(1)：31-37,7.DOI:10.3969/j.issn.1001-1986.2016.01.006
准噶尔盆地南缘煤系水矿化度对低煤阶煤层气的影响
The influence of the salinity of groundwater in coal measures on low rank coalbed methane in the south margin of Junggar basin
摘要
Abstract
Groundwater salinity of coal-series is one of important factors affecting the generation, migration and accumulation of low rank coal bed gas. Taking south of Junggar Basin in Xinjiang as the study area, it is divided into eight hydrogeological units. Distribution characteristics of groundwater salinity of coal-series and the influence on methanogen’s living in the study area are researched. Taking 1000 m depth as example, methane solubility of groundwater in coal-series in each hydrogeological unit was estimated. Capacity for transporting methane was analysed and assessed. Through the analysis of distribution of groundwater salinity, the chloride concentration of groundwater in coal-series and regional geological structures, the flow direction of groundwater in coal-series can be found. Taking Liuhuanggou hydrogeological unit as example relationship between salinity and enrichment of coalbed methane is discussed. The Research results show that the salinity distribution has the characteristics of north-south sub-zone and east-west subsection. Houxia hydrogeological unit, south of Manas river—Hutubi River hydrogeological unit, south of Liuhuanggou hydrogeological unit, west of Fukang hydrogeological unit promote the survival and methane generation of methanogens. Capacity for transporting methane of Houxia hydrogeological unit is strong. The runoff of surface water can influence the flow direction of groundwater . The center of high salinity and depression of low water level is the accumulation area of low-rank coal-bed methane in Liuhuanggou hydrogeological unit.关键词
准噶尔盆地南缘/煤层气/低煤阶煤/矿化度/水文地质条件Key words
south margin of Junggar Basin/coalbed methane/low-rank coal/salinity/hydrogeological conditions分类
天文与地球科学引用本文复制引用
魏迎春,张强,王安民,任会康,袁远,曹代勇..准噶尔盆地南缘煤系水矿化度对低煤阶煤层气的影响[J].煤田地质与勘探,2016,(1):31-37,7.基金项目
全国油气资源战略选区调查与评价项目(1211302108025-2)；国家自然科学基金项目(41402134)@@@@Investigation and Evaluation Project for Strategic Petroleum Target Area Selection in China(1211302108025-2)；National Natural Science Foundation of China(41402134) （1211302108025-2）
