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地球科学进展  2015, Vol. 30 Issue (4): 456-464    DOI: 10.1167/j.issn.1001-8166.2015.04.0456
研究论文     
黔西红梅井田煤层气有序开发的水文地质条件
郭晨, 秦勇, 卢玲玲
中国矿业大学 煤层气资源与成藏过程教育部重点实验室,江苏徐州221116
Hydrogeological Conditions of Orderly Coalbed Methane Development in Hongmei Well Field, Western Guizhou, South China
Guo Chen, Qin Yong, Lu Lingling
Key Laboratory of CBM Resources and Reservoiring Process, China University of Mining and Technology, Xuzhou 221116, China
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摘要:

在多煤层含煤地层中,往往形成垂向上叠置发育的多个独立含煤层气系统,系统之间的相互干扰严重妨碍了煤层气井的有效排水降压。解决这一问题的关键,是查明不同系统之间水文地质条件的差异。基于水文地质勘探成果,分析了黔西织纳煤田红梅井田上二叠统含煤地层不同含煤段的水动力条件和水化学特征,提取视储层压力、压力系数、钻孔单位涌水量、渗透系数、影响半径等与煤层气开发相关的有用信息,发现不同含煤段之间的水文地质条件差异显著,垂向上可能发育与三级地层层序格架相吻合的多层叠置独立含煤层气系统,运用灰色关联分析建立了基于水文地质信息的煤层气开发条件评价因子。在此基础上,评价了不同含煤段的煤层气开发潜力,对煤层气开发顺序进行了概念性设计。研究认为,17~30号煤层段的煤层气开发条件优于其上、下2段,应优先开发,其次是6~16号煤层段;31号煤层至底部开发条件相对较差,应最后开发。

关键词: 评价因子煤层气开发含煤层气系统水文地质灰色关联分析    
Abstract:

A number of the independent CBM-bearing systems are often superposed in coal-bearing strata with multiple coal seams, and the interference among the systems impedes severely the efficient drainage and depressurization of CBM wells. The key to solve this problem is to find out the differences of the hydrogeological conditions among the systems. Based on the data of hydrogeological exploration in the Hongmei Well Field, Zhina Coal Field, western Guizhou, we analyzed the hydrodynamic and hydrochemical conditions of different coal-bearing intervals in the Upper Permian coal-bearing strata, and extracted the valuable information relevant to CBM development, including the apparent reservoir pressure, pressure coefficient, drilling unit water inflow, permeability coefficient and influence radius. It is revealed that the hydrogeological condition of different coal-bearing intervals in the formation is significantly different each other, indicating the existence of the multiple superposed CBM-bearing systems in conformity with the third-order stratigraphic sequence framework. The evaluation factor of CBM development condition was further established with grey relational analysis. Based on the factor, the CBM development potentials of different coal-bearing intervals were discussed and vertical development order was designed conceptually. Results showed that the interval of the No.17~30 coal seams with the best condition should be prior for CBM development, then the interval of the No. 6~16 coal seams, and finally the interval of the No. 30 seam-formation bottom with the relatively poor condition.

Key words: CBM development    Evaluation factor.    CBM-bearing system    Hydrogeology    Grey relational analysis
收稿日期: 2015-01-30 出版日期: 2015-04-20
:  P618.13  
基金资助:

国家科技重大专项项目“煤层气储层工程与动态评价技术”(编号:2011ZX05034); 江苏省普通高校研究生科研创新计划项目“独立叠置含煤层气系统有序开发模式”(编号:CXZZ13_0943)资助

作者简介: 郭晨(1988-),男,山西晋城人,博士研究生,主要从事煤层气地质研究. E-mail:makaay_@126.com
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引用本文:

郭晨, 秦勇, 卢玲玲. 黔西红梅井田煤层气有序开发的水文地质条件[J]. 地球科学进展, 2015, 30(4): 456-464.

Guo Chen, Qin Yong, Lu Lingling. Hydrogeological Conditions of Orderly Coalbed Methane Development in Hongmei Well Field, Western Guizhou, South China. Advances in Earth Science, 2015, 30(4): 456-464.

链接本文:

http://www.adearth.ac.cn/CN/10.1167/j.issn.1001-8166.2015.04.0456        http://www.adearth.ac.cn/CN/Y2015/V30/I4/456

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