中高煤阶煤层气富集高产区形成模式与地质评价方法

发布时间：2018-04-13 14:43

本文选题：煤层气 + 中高煤阶　；参考：《地学前缘》2016年03期

【摘要】：煤层气富集高产区富集机理和地质评价方法对煤层气勘探选区至关重要,以往的研究主要集中在资源富集区形成机理和预测方面,但煤层气勘探开发实践表明资源富集区并不一定是高产区,如何在煤层气资源富集区中寻找高产区即煤层气富集高产区是国内外煤层气勘探面临的难题。通过国内外典型煤层气富集高产区的剖析,结合我国中高煤阶富集区地质特点,以沁水盆地南部、鄂尔多斯盆地东缘和两淮矿区为研究对象,采用地质统计、实验验证和生产数据分析相结合的研究方法,揭示了基于含气量-渗透率耦合控制的煤层气富集高产区形成机理,提出了3种中高煤阶煤层气富集高产区形成模式;围绕煤层含气量和渗透率两个核心要素,利用层次分析法和主成分分析法确定了包含7大地质参数的评价指标体系,建立了基于产能分析的煤层气富集高产区方法体系。这些认识对我国中高煤阶煤层气区带、区块、目标的优选具有重要的指导作用。
[Abstract]:Coalbed gas enrichment zone of enrichment mechanism and geological evaluation methods are very important for coalbed methane exploration and selection, previous studies focused on the formation mechanism and prediction of resource rich region, but the practice of CBM exploration and development indicates that the resource rich region is not necessarily the high yield region, how to find the high yield region in coalbed methane resource rich region in coalbed gas enrichment the high yield region is a difficult problem at home and abroad for coal-bed gas exploration. Through the analysis of typical coalbed gas enrichment area at home and abroad, combined with our country high rank coal enrichment zone geological characteristics in southern Qinshui Basin, Ordos Basin and the eastern margin of two Huai coal mine as the research object, using geological statistics, analysis experiment and production data combined, reveals the gas permeability of coal bed gas - coupling control enrichment zone formation mechanism based on the proposed 3 kinds of high rank coalbed methane enrichment high Producing formation mode; around the coal seam gas content and permeability of two core elements, analysis the geological parameters includes 7 evaluation index system by AHP and principal component analysis, establishes the production of coalbed methane enrichment in high yield region. These methods system based on the understanding of China's high rank coalbed gas zone, block the preferred target, has an important guiding role.

【作者单位】：中国石油勘探开发研究院;中国石油大学(北京);中国石油盆地构造与油气成藏重点实验室;中煤科工集团西安研究院;中国科学院大学;中国石油勘探开发研究院廊坊分院;
【基金】：国家重点基础研究发展计划“973”项目“高丰煤层气富集机制及提高开采效率基础研究”(2009CB219600)
【分类号】：P618.13

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