Petroleum Exploration and Development >

2016 , Vol. 43 >Issue 2: 303 - 309

DOI: https://doi.org/10.11698/PED.2016.02.19

Orignal Article

Enrichment mechanism and exploration and development technologies of high rank coalbed methane in south Qinshui Basin, Shanxi Province

  • ZHAO Xianzheng ,
  • YANG Yanhui ,
  • SUN Fenjin ,
  • WANG Bo ,
  • ZUO Yinqing ,
  • LI Mengxi ,
  • SHEN Jian ,
  • MU Fuyuan
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  • 1. PetroChina Huabei Oilfield Company, Renqiu 062552, China;
    2. PetroChina Dagang Oilfield Company, Tianjin 300280, China;
    3. PetroChina Research Institute of Petroleum Exploration & Development-Langfang 065007, China;
    4. School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
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Abstract

Based on analysis of the basic geologic characteristics and enrichment controlling factors of the high rank coalbed methane (CBM) in south Qinshui Basin in China, its enrichment mode, and exploration and development technologies are studied. Practices on the CBM exploration and development proved that the CBM reservoirs in this study area have the following three major properties: (1) High coal rank, strong adsorption ability, and good resources condition; (2) Low porosity, bimodal porosity structure, and obvious “bottleneck” of flow condition; (3) low reservoir pressure gradient that can constrain production. Based on deep analysis of high rank coal properties, this study proposes a coexistence and complementarity concept of structure, sedimentary, thermal power and hydro-geological conditions, and establishes a CBM dissipation model, which can simplify CBM enrichment problem and directly guide the region selection of CBM development. Five major critical technical systems have been formed for the CBM exploration and development in south Qinshui Basin: (1) Comprehensive geophyisical exploration and evaluation technologies; (2) Well drilling and completion technologies for high rank coal reservoirs; (3) Major reservoir treatment technologies; (4) Intelligent drainage and production control technologies; (5) Digital technology of coalbed gas field. These have effectively provided technical support for an orderly productivity construction of new CBM blocks.

Key words： Qinshui Basin; high rank coal; coalbed methane; enrichment characteristics; enrichment condition; exploration and development technologies

Cite this article

ZHAO Xianzheng , YANG Yanhui , SUN Fenjin , WANG Bo , ZUO Yinqing , LI Mengxi , SHEN Jian , MU Fuyuan . Enrichment mechanism and exploration and development technologies of high rank coalbed methane in south Qinshui Basin, Shanxi Province[J]. Petroleum Exploration and Development, 2016 , 43(2) : 303 -309 . DOI: 10.11698/PED.2016.02.19

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