平顶山煤田煤储层物性特征与煤层气有利区预测

姚艳斌; 刘大锰; 汤达祯; 唐书恒; 黄文辉; 胡宝林; 车遥

平顶山煤田煤储层物性特征与煤层气有利区预测

1.
中国地质大学能源学院, 北京 100083
2.
安徽理工大学资源和环境系, 安徽淮南 232000

基金项目:

国家自然科学基金项目 40572091

国家重点基础研究发展计划课题 2002CB211702

中国地质调查局资助项目 20021010004

国家重点基础研究发展计划课题 2006CB202202

详细信息

作者简介:
姚艳斌(1978-), 男, 博士研究生, 从事油气及煤层气地质研究工作.E-mail: yaoyanbin@126.com

中图分类号: P618.130.2+1
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出版历程
- 刊出日期: 2007-03-25

Coal Reservoir Physical Characteristics and Prospective Areas for CBM Exploitation in Pingdingshan Coalfield

1.
Faculty o f Energy Resources, China University o f Geosciences, Beijing 100083, China
2.
Department o f Resources and Environmental Engineering, Anhui University o f Science and Technology, Huainan 232000, China

摘要

摘要: 通过对平顶山煤田采集煤样的煤质、煤岩显微组分、煤相、煤岩显微裂隙分析, 低温氮比表面及孔隙结构和压汞孔隙结构测试, 研究了该区的煤层气赋存地质条件、煤层气生气地质条件和煤储层物性特征.并采用基于GIS的多层次模糊数学评价方法计算了该区的煤层气资源量, 预测了煤层气资源分布的有利区.研究结果表明, 该区煤层气总资源量为786.8×10⁸m³, 煤层气资源丰度平均为1.05×10⁸m³/km², 具有很好的煤层气资源开发潜力.其中, 位于煤田中部的八矿深部预测区和十矿深部预测区周边地区, 煤层累计有效厚度大, 煤层气资源丰度高, 煤层埋深适中, 同时由于该受挤压构造应力影响, 煤储层孔裂隙系统发育、渗透性高, 是该区煤层气勘探、开发的最有利目标区.
- 煤层气 /
- 平顶山煤田 /
- 储层物性 /
- 有利目标区
Abstract: Based on the elemental, maceral, micro-fracture, coal facies, liquid nitrogen adsorption/desorption and mercury injection analyses, the coalbed methane (CBM) geological characteristics, coal reservoir physical characteristics, CBM resources and its exploration and exploitation prospect in Pingdingshan coalfield were systematically studied. The in-place CBM resource was calculated using the fuzzy mathematics and stacking analysis of GIS (geographic information system) method. The results show that the in-place CBM resources and the resources abundance in Pingdingshan coalfield are about 786. 8× 10⁸ m³ and 1.05 ×10⁸ m³/km² respectively, which are very favorable for CBM exploration and development. The optimum target areas in this coalfield are the deep prediction districts of No. 8 and No. 10 coal districts, where the coal reservoirs have higher coal thickness and CBM resource abundance, good burial depth, well connected pore-cleat systems, and higher permeability resulting from the tectonic stress.
- coalbed methane /
- Pingdingshan coalfield /
- coal reservoir characteristics /
- prospective and target area

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图 1 平顶山煤田煤样压汞曲线

Fig. 1. Mercury-injection curves of selected coals in Pingdingshan coalfield

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图 2 平顶山煤田煤样低温氮吸/脱附曲线

Fig. 2. Liquid nitrogen isotherm adsorption/desorption on selected coals in Pingdingshan coalfield

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图 3 平顶山煤田煤层气勘探开发有利区分布区块

Fig. 3. Prospective and target areas for CBM exploitation and exploration in Pingdingshan coalfield

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表 1 平顶山煤田煤样煤质、煤岩显微组分和煤相分析

Table 1. Elemental and maceral analyses of selected coals in Pingdingshan coalfield

表 2 平顶山煤田2 000 m以上煤层气资源量计算结果

Table 2. CBM resources above 2 000 m in Pingdingshan coalfield

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