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华北安鹤煤田煤储层特征与煤层气有利区分布
  • 期刊名称:刘大锰,姚艳斌,刘志华,汤达祯,唐书恒,车遥,黄文辉.华北安鹤煤田煤储层特征与煤层气有利区分布. 现
  • 时间:0
  • 分类:P618.11[天文地球—矿床学;天文地球—地质学]
  • 作者机构:[1]中国地质大学能源学院,北京100083
  • 相关基金: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(2002CB211702,2006CB202202);中国地质调查局资助项目(20021010004,1212010534702).
  • 相关项目:多热源叠加变质作用对煤层气储层物性的控制机理研究
中文摘要:

通过对安鹤煤田采集煤样的煤质、显微组分、煤相、显微裂隙分析,等温吸附、低温氮比表面及孔隙结构和压汞孔隙结构测试,研究了该区煤层气赋存的地质条件、煤层气生气地质特征和煤储层物性特征。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,预测了煤层气有利区分布。研究结果表明,该区煤层气总资源量为1115.73×10^8m^3,煤层气资源丰度平均为1.18×10^8m^3/km^2,具有很好的煤层气资源开发潜力。在煤田中部的四矿到八矿之间的地区以及北部的水冶镇附近地区,煤层累计有效厚度大、煤层气资源丰度高、煤层埋深适中、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。

英文摘要:

Based on the coal quality, maceral, coal facies, micro-fracture, liquid nitrogen isotherm adsorption/ desorption and mercury-injection analyses, the occurrence conditions and generation geological characteristics of coalbed methane (CBM), coal reservoir physical characteristics, CBM resource and it's exploration and exploitation prospect in the Anyang-Hebi coalfield have been 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 resource abundance in the Anyang-Hebi coalfield are about 1, 115.73 × 10^8 m^3 and 1.18 × 10^8 m^3/km^2 respectively, which are very favorable for CBM exploration and development. The optimum target areas in this coalfield are located in the No. 4 mine to No. 8 mine districts of middle coalfield and around Shuiyezhen town in the northern coalfield, where the coal reservoirs have a huge coal thickness and a high CBM resource abundance, a good burial depth, well-connected pore-fracture systems, and a high permeability resulting from the local tectonic stress.

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