天然气地球科学

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准南煤田玛纳斯矿区向斜—承压式煤层气富集模式

韩旭,田继军,冯烁,张雨瑶   

  1. 新疆大学地质与矿业工程学院,新疆  乌鲁木齐 830047
  • 收稿日期:2017-07-24 修回日期:2017-10-03 出版日期:2017-12-10 发布日期:2017-12-10
  • 通讯作者: 田继军(1978-),男,山东泰安人,教授,博士,主要从事煤田及煤层气地质学研究. E-mail:tianjijun@xju.edu.cn
  • 作者简介:韩旭(1993-),男,山东东营人,硕士研究生,主要从事煤田及煤层气地质学研究.E-mail:hanxuboy@126.com.
  • 基金资助:
    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.

Syncline-confined-water model of coalbed methane enrichmentin Manasi mining area,Southern Junggar Coal-field

Han Xu ,Tian Ji-jun ,Feng Shuo ,Zhang Yu-yao   

  1. Institute of Geology and Mining Engineering,Xinjiang University,Urumpi 830047,China
  • Received:2017-07-24 Revised:2017-10-03 Online:2017-12-10 Published:2017-12-10

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。

关键词: 准南煤田, 中&mdash, 低阶煤层气, 富集规律, 成藏模式

Abstract:

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,particulate 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,sedimentary,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 synclinal shafts which have higher coal rank,good mineralization of groundwater and good sealing condition are enrichment area of coalbed methane.

Key words: Zhunnan Coal-field, Middle-low rank coalbed methane, Enrichment rules, Reservoir formation model

中图分类号: 

  • TE122.2

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