基于主地质参数的煤层气有利开发区优选及应用

现代地质 ›› 2014, Vol. 28 ›› Issue (3): 653-658.

基于主地质参数的煤层气有利开发区优选及应用

李俊乾^1,2,3，刘大锰^1,2，姚艳斌^1,2，蔡益栋^1,2，郭晓茜^1,2

(1中国地质大学国家煤层气工程中心煤储层实验室，北京100083；2中国地质大学(北京)能源学院，北京100083； 3中国石油大学(华东)非常规油气与新能源研究院，山东青岛266580)

出版日期:2014-06-12 发布日期:2014-06-15
作者简介:李俊乾，男，博士研究生，1987年出生，矿产普查与勘探专业，主要从事煤储层物性研究工作。Email: lijunqian1987@126.com。
基金资助:
国家科技重大专项项目(2008ZX05062-006)；国家自然科学基金委员会-中国石油天然气集团公司石油化工联合基金项目(U1262104)；北京市优秀博士学位论文指导教师项目(YB20101141501)；中央高校基本科研业务费项目(2652013007)；新世纪优秀人才支持计划资助项目(NCET-11-0721)。

A Method for Targeting Favorable Coalbed Methane Development Area Based on Primary Geological Parameters and Its Application

LI Jun-qian^{1, 2,3}, LIU Da-meng^1,2, YAO Yan-bin^1,2, CAI Yi-dong^1,2, GUO Xiao-qian^1,2

(1Coal Reservoir Laboratory of National Engineering Research Center of CBM Development & Utilization, China University of Geosciences, Beijing100083, China; 2School of Energy Resources, China University of Geosciences, Beijing100083, China; 3Institute of Unconventional Hydrocarbon and New Energy, China University of Petroleum, Qingdao,Shandong266580, China)

Online:2014-06-12 Published:2014-06-15

摘要/Abstract

摘要：

煤层气有利开发区既是煤层气富集区、高渗区，又是煤层气高产区，因此寻找能表征煤层气富集区、高渗区和高产区的主地质参数，是解决煤层气有利区优选问题的关键。基于区块尺度的煤层气有利区优选，建立了一种定量化的综合评价方法：(1)以含气量、储层压力、临界解吸压和试井渗透率为主地质参数并作为评价指标，以煤层气井稳产阶段平均日产气量作为衡量指标，采用灰色关联度分析法定量地确定各评价指标的权重系数以及评价值函数；(2)借助于MapInfo professional软件，计算煤层气区任意位置的综合评价值；(3)用产气量对综合评价值进行标定，确定煤层气开发区类型及分布范围。将该方法应用于沁水盆地南部勘探程度较高的郑庄区块，预测出煤层气有利开发区(产气量＞2 000 m³/d)的分布范围，研究结果对于下一步的煤层气钻井部署具有一定的参考意义。

关键词: 煤层气有利区, 主地质参数, 灰色关联度, 郑庄区块, 沁水盆地

Abstract:

Favorable coalbed methane (CBM) development area is characterized by high CBM content, high coal reservoir permeability and high gas productivity. Finding out the primary geological parameter representative of the three high properties is a key to comprehensively evaluate CBM-bearing reservoirs. In this paper, a quantitative method was proposed to target favorable CBM area for a CBM development block. Coalbed gas content, reservoir pressure, critical desorption pressure and coal permeability obtained by injection/falloff well test were selected to be as primary geological parameters used for comprehensively evaluating favorable CBM area. Their weight coefficients and evaluation value functions were obtained by analyzing correlation degree of the geological parameters with the mean gas production rate at stable production period. Based on the soft of MapInfo professional, comprehensive evaluation values for the arbitrary locations of the study area were calculated, and then were calibrated by the mean gas production rate so as to divide different CBM development areas. This method was successfully applied to Zhengzhuang block in southern Qinshui Basin, and favorable CBM areas with the gas-production value larger than 2,000 m³/d were predicated; the result is significant to guide the CBM well drilling in the next stage.

Key words: favorable coalbed methane area, primary geological parameter, grey correlation degree, Zhengzhuang block, Qinshui Basin

中图分类号:

李俊乾，刘大锰，姚艳斌，蔡益栋，郭晓茜. 基于主地质参数的煤层气有利开发区优选及应用[J]. 现代地质, 2014, 28(3): 653-658.

LI Jun-qian, LIU Da-meng, YAO Yan-bin, CAI Yi-dong, GUO Xiao-qian. A Method for Targeting Favorable Coalbed Methane Development Area Based on Primary Geological Parameters and Its Application[J]. Geoscience, 2014, 28(3): 653-658.

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