中国煤层气的富集特征  

Characteristics of CBM Enrichment in China

作　　者：王红岩[1] 李贵中[1] 李景明[1] 刘洪林[1] 王勃[1] 

机构地区：[1]中国石油勘探开发研究院廊坊分院,河北廊坊065007

出　　处：《中国煤层气》2006年第2期7-10,共4页China Coalbed Methane

基　　金：国家重点基础研究发展计划(973计划)煤层气项目"中国煤层气成藏机制及经济开采基础研究"一级子课题"煤层气成藏条件;气藏模式及富集理论"(项目编号:2002CB211705)资助

摘　　要：煤层气富集规律的研究贯穿着煤层气勘探、开发与利用的始终,与煤田地质学、天然气地质学、流体力学等学科息息相关,向斜构造部位是煤层气富集的主要区域,大量研究与实践证实向斜具有天然维持地层压力的机制,煤层气容易富集。构造热事件一方面使煤层短时间内受热,煤阶升高,煤层气大量生成,同时改善了煤的储层物性,对煤层气富集起到重要作用。上覆地层有效厚度可以有效评估构造运动史、沉积史和生烃史的匹配关系。水文地质条件是煤层气保存及形成超压的主要因素。The study on CBM enrichment law nms through the whole process of CBM exploration, development and utilization, intimately related to coalfield geology, natural gas geology, fluid mechanics, etc. The main zones of CBM enrichment feature synelinal structure, and a great amount of study and practice eonfirms the synclinal mechanism of keeping stratum pressure naturally, CBM being easily enriched. The structural heat, on the one hand, causes the coal seam temperature to rise in a short time, the coal rank going high and CBM generated in a large amount, and, on the other hand, improves the properties of coal reservoir at the same time, which plays a big role in CBM enrichment. The effective thickness of the overlying stratum could be used to make a successful evaluation on the matching relationship between structural movement history, sedimentation history and hydrocarbon generation history. The hydrological geological condition is the main factor for CBM preservation and excess pressure formation.

关 键 词：煤层气 富集 因素 

分 类 号：P618.11[天文地球—矿床学]