| 煤层群条件下的煤层气成藏特征 |
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| 引用本文： | 杨兆彪,秦勇,高弟,王斌.煤层群条件下的煤层气成藏特征[J].煤田地质与勘探,2011(5). |
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| 作者姓名： | 杨兆彪 秦勇 高弟 王斌 |
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| 作者单位： | 中国矿业大学资源与地球科学学院;胜利石油管理局井下作业公司试气2队; |
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| 基金项目： | 国家自然科学基金项目(40730422); 江苏省科研创新计划项目(CX09B_117Z) |
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| 摘 要： | 基于对我国煤层群发育特征的分析,在概述前人多煤层条件下煤层气成藏特征研究成果的基础上,发现煤层群成藏特征主要表现在垂向上存在多层统一煤层气系统或多层叠置含气系统,陆相河流–三角洲–湖泊相的煤层群一般为多层统一煤层气系统,海陆过渡相的三角洲–潮坪–泻湖相煤层群一般为多层叠置含气系统。进一步解剖比德–三塘盆地实测钻孔资料显示,层序组合是煤层群独立含气系统发育的关键。依据该区抽水钻孔资料分析亦证明,至少存在4套独立含气系统。泻湖潮坪相发育的煤组存在超压的可能,但储层能势分布不均匀。另外,煤层群内部各煤层之间由于烃浓度封闭效应及煤层本身的低渗透性对流体流动存在叠加封闭作用,使煤层群储层存在超压可能性增大。这些结论深化了对煤层群成藏特征的认识。
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| 关 键 词： | 煤层群 含气系统 叠加封闭 超压 层序 成藏特征 |
Coalbed methane (CBM) reservoir-forming character under conditions of coal seam groups |
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| YANG Zhaobiao,QIN Yong,GAO Di,WANG Bin.Coalbed methane (CBM) reservoir-forming character under conditions of coal seam groups[J].Coal Geology & Exploration,2011(5). |
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| Authors: | YANG Zhaobiao QIN Yong GAO Di WANG Bin |
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| Institution: | YANG Zhaobiao1,QIN Yong1,GAO Di1,WANG Bin2(1.School of Mineral Resources and Geoscience,China University of Mining and Technology,Xuzhou 221008,China,2.Team 2 of Downhole Test Gas,Shengli Petroleum Administration,Dongying 257077,China) |
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| Abstract: | Based on development character of Chinese coal seam groups,research fruits of predecessors about CBM reservoir-forming character under conditions of coal seam groups were summarized.CBM reservoir-forming character of coal seam groups mainly exhibited multiple united CBM system or multiple superposed CBM system,coal seam groups of land river-delta-lake environments commonly showed multiple united CBM system,but coal seam groups of sea-land transition delta-tideflat-lagoon environments showed multiple superpo... |
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| Keywords: | coal seam groups CBM-bearing system superposed obturation overpressure sequence reservoir-forming character |
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