石油学报 ›› 2014, Vol. 35 ›› Issue (6): 1080-1086.DOI: 10.7623/syxb201406005

• 地质勘探 • 上一篇    下一篇

中高煤阶煤储层吸附能力演化历史定量恢复——以鄂尔多斯盆地韩城地区为例

马行陟1,2, 宋岩1,2,3, 柳少波1,2, 姜林1,2, 洪峰1,2   

  1. 1. 中国石油勘探开发研究院 北京 100083;
    2. 中国石油天然气集团公司盆地构造与油气成藏重点实验室 北京 100083;
    3. 中国石油大学非常规天然气研究院 北京 102249
  • 收稿日期:2014-05-26 修回日期:2014-10-08 出版日期:2014-11-25 发布日期:2014-10-13
  • 通讯作者: 马行陟,男,1984年5月生,2006年获中国石油大学(华东)学士学位,2012年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院工程师,主要从事天然气地质和油气成藏机理研究工作。Email:maxingzhi@petrochina.com.cn
  • 作者简介:马行陟,男,1984年5月生,2006年获中国石油大学(华东)学士学位,2012年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院工程师,主要从事天然气地质和油气成藏机理研究工作。Email:maxingzhi@petrochina.com.cn
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2009CB219600)、中国石油天然气股份有限公司科学研究与技术开发项目(2014A-0214)资助。

Quantitative research on adsorption capacity evolution of middle-high rank coal reservoirs in geological history: a case study from Hancheng area in Ordos Basin

Ma Xingzhi1,2, Song Yan1,2,3, Liu Shaobo1,2, Jiang Lin1,2, Hong Feng1,2   

  1. 1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
    2. Key Laboratory of Basin Structure and Petroleum Accumulation, CNPC, Beijing 100083, China;
    3. Unconventional Natural Gas Institute, China University of Petroleum, Beijing 102249, China
  • Received:2014-05-26 Revised:2014-10-08 Online:2014-11-25 Published:2014-10-13

摘要:

中国的中高煤阶含煤盆地均经历了多次沉降和抬升,开展地质时期煤储层吸附能力演化历史研究对于认识煤层气的富集和成藏具有重要意义。根据中高煤阶煤储层样品的高温高压吸附实验,建立了煤储层吸附能力演化历史分析方法,恢复了鄂尔多斯盆地韩城地区主力煤层的吸附演化过程。研究表明,中高煤阶煤储层的吸附量受多种因素控制,吸附量与压力、热演化程度呈正相关,与温度、水分、灰分和挥发分呈负相关关系。在数学分析的基础上建立了基于温度、压力和热演化程度三参数Langmuir扩展的吸附量预测模型。结合韩城地区埋藏史和热史,恢复了研究区主力煤储层吸附演化过程,指出韩城地区主力煤储层吸附量随地质历史时期大致经历了低吸附稳定阶段、吸附增加阶段和高吸附稳定阶段3个阶段演化过程。

关键词: 中高煤阶, 煤层气, 吸附能力, 演化, 韩城地区

Abstract:

In China, middle-high rank coal-bearing basins have undergone multiple subsidence and uplift events. Research on the adsorption capacity evolution of middle-high rank coal reservoirs in geological history has implications for better understanding of coalbed methane enrichment and accumulation. In accordance with the data of high-temperature and high-pressure methane isotherm adsorption experiments, a mathematical method was established for predicting adsorption evolution of coal reservoirs and then the adsorption evolution process reconstructed for main coal reservoirs in Hancheng area, Ordos Basin. Results show that the adsorption capacity of middle-high rank coal reservoirs is influenced by multiple factors. It is positively correlated with pressure and thermal evolutionary degree of coals, and negatively correlated with temperature, moisture content, ash content and volatile matter content. Based on mathematical analysis, an extended Langmuir model considering temperature, pressure and thermal evolutionary degree was built to predict the adsorption capacity of middle-high rank coals. Combined with the analysis of burial history and thermal history, the adsorption evolution process of the main coal reservoirs in Hancheng area was divided into three stages, including the stable low-adsorption stage, increasing adsorption stage, and stable high-adsorption stage.

Key words: middle-high coal rank, coalbed methane, adsorption capacity, evolutionary history, Hancheng area

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