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天然气地球科学 ›› 2011, Vol. 22 ›› Issue (4): 738–746.doi: 10.11764/j.issn.1672-1926.2011.04.738

• 非常规天然气 • 上一篇    下一篇

煤层气高产富集规律及开采特征研究新进展

 孔祥文, 赵庆波, 孙粉锦, 李贵中, 马财林   

  1. 1.中国石油勘探开发研究院廊坊分院,河北  廊坊  065007； 
    2.中国石油长庆油田分公司勘探开发研究院,陕西 西安  710021
  • 收稿日期:2010-08-25 修回日期:2010-11-05 出版日期:2011-08-10 发布日期:2011-08-10
  • 作者简介:孔祥文（1987-），男，山东泰安人，硕士研究生，主要从事煤层气地质方面的研究.
  • 基金资助:

    国家科技重大专项“大型油气田及煤层气开发”子课题“煤层气富集规律研究及有利区块预测评价”（编号:2008ZX05033）资助.

New Advances of Productive and Enriching Patterns  and Production Characteristics of Coalbed Methane in China

 KONG  Xiang-Wen, ZHAO   Qiang-Bo, SUN  Fen-Jin, LI  Gui-Zhong, MA  Cai-Lin   

  1. 1.Langfang Branch,PetroChina Research Institute of Petroleum Exploration
    and Development,Langfang 065007,China;
    2.Exploration and Development Research Institute of Changqing Oilfield Company,PetroChina,Xi′an 710021,China
  • Received:2010-08-25 Revised:2010-11-05 Online:2011-08-10 Published:2011-08-10

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摘要：

中国煤层气高产富集区有五大类型,即:富煤区构造高点\,直接盖层稳定的上斜坡\,凹中隆的火山岩活动区\,封闭好的浅层低煤阶厚煤层区及断裂活动次生割理发育区。煤层气高产富集基本条件是三控论：封盖层控制含气量；应力场控制渗透率；构造体和煤体控制富集带。重点分析了沉积环境对煤层气高产富集的控制作用，从成煤原始母质\,封盖能力\,储集物性3个方面进行了阐述。木本植物为主的母质比草本植物为主的母质对煤层气的生成和保存更为有利。在各种沉积体系中，浅海—障壁海岸和湖泊2种类型，对煤储层的封盖能力较强。灰分含量越低、镜质组含量越高、微裂隙越发育，煤储层的物性越好。此外，还分析了煤层气高产富集的关键参数。阐述了煤层气开采特征，特别进行了定向羽状水平井高产条件分析，重点阐述了煤层水的类型及特点，包括层内水、层间水和外源水。

关键词: 煤层气, 富集规律, 开采特征, 沉积环境, 煤层水

Abstract:

Five coalbed methane productive and enriching types are examined in China,including structural high of coal\|rich zone,upslope with stable regional direct cap rock,uplift of depressions in regional active volcanic zone,well-sealed thick coal zone with low coal rank and faulting & secondary cleat developed zone.The productivity and enrichment of coalbed methane are based on the following three conditions: cap rocks control gas content;stress field controls permeability;structure and coal types control enrichment zone.The controlments of sedimentary environment on coalbed methane enrichment are also analyzed,including the coal-forming precursor,sealing ability and reservoir quality.Woody plants are better than herbs in coalbed methane generation and preservation.Shallow sea-coastal barrier and lake environments have better sealing ability.Coals with lower ash content,higher vitrinite content and developed microfracture have better reservoir quality.Further,key parameters of coalbed methane productivity and enrichment are analyzed.The production characteristics of coalbed methane are elaborated,and the productive conditions of directional pinnate horizontal wells are emphatically analyzed.Three types of coalbed water including internal water,interlayer water and external water are described.

Key words: Coalbed methane, Enriching pattern, Production characteristics, Sedimentary environment, Coalbed water.

中图分类号: 

  • TE132.2

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