摘要
准南煤田玛纳斯矿区煤层气资源丰富,但是该区复杂的构造、多层叠置的煤层、特殊的地下水动力场等因素造成煤层气富集规律复杂。通过系统收集、分析已有煤田、煤矿及油气勘探资料,对影响玛纳斯矿区煤层气富集的煤级、构造、沉积、水文地质等诸多因素进行研究。结果表明,多期构造形成了清水河与南玛纳斯向斜,扇三角洲平原沼泽控制了厚煤层发育,扇三角洲相、河流相及湖泊相控制下封盖条件优越,火烧区影响下的弱径流地下水动力系统封堵煤层气逸散。上述因素共同控制了玛纳斯矿区向斜—承压富集模式,认为煤级较高、地下水矿化度适中及封盖条件较好的清水河与南玛纳斯向斜轴部为煤层气最有利富集区。
Coalbed methane resources are rich in Manasi mining area of Southern Junggar Coal-field, but the enrichment rules of coalbed methane are complex because of complex structures, multi-layer seam, particu- late hydrodynamic field. With analytical data of mining area, coal mine, oil and gas exploration, we study many factors which influence the enrichment of coalbed methane, such as coal rank, structural, sedimenta- ry,hydrogeology.The results show that tectonic movement form Qingshuihe and Manasi syncline,swamp on plain control the growth of thick coal seam, sealing conditions which controlled by fan delta fluvial facies and lacustrine facies, the underground water dynamic system which controlled by burning area can hinder the dissipation of coalbed methane.The above factors control the enrichment and reservoir formation model of coalbed methane in the Mansi mining area.The research shows that south Manasi and Qingshuihe syncli- nal shafts which have higher coal rank,good mineralization of groundwater and good sealing condition are enrichment area of coalbed methane.
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2017年第12期1891-1897,共7页
Natural Gas Geoscience
基金
新疆维吾尔自治区杰出青年自然科学基金项目(编号:2014711002)资助
关键词
准南煤田
中—低阶煤层气
富集规律
成藏模式
Zhunnan Coal-field
Middle-low rank coalbed methane
Enrichment rules
Reservoir formation model
