煤层气富集高产的主控因素  

Main Controlling Factors Analysis of Enrichment Condition of Coalbed Methane

作　　者：高波[1] 马玉贞[2] 陶明信[1] 马根喜 

机构地区：[1]中国科学院兰州地质研究所气体地球化学国家重点实验室,兰州730000 [2]兰州大学资源环境学院西部环境教育部重点实验室,兰州730000 [3]甘肃省地质矿产勘察开发局第二地质矿产勘察院,兰州730020

出　　处：《沉积学报》2003年第2期345-349,共5页Acta Sedimentologica Sinica

基　　金：国家 973计划<中国煤层气成藏机制及经济开采基础研究>项目资助

摘　　要：对煤岩的生储气能力、煤储层渗透率、煤层气保存条件等影响煤层气高产富集的主控因素进行了分析。煤岩组分和煤变质程度是影响煤层生储气能力的主控因素。煤层的储气能力与温度、压力、灰分及水分含量等亦有关。煤层的渗透率取决于煤层本身的裂隙系统 ,而裂隙的发育程度又与煤变质程度及构造活动的强弱相关。煤层气的保存则取决于顶底板的封盖能力、构造活动、水动力环境等条件。煤层气成藏条件是煤层气基础地质研究中的核心问题 ,应加强研究。In this paper, the authors have analyzed the main controlling factors that affect enrichment and high production of coalbed methane (CBM), such as generating and storing capacity of coal rock, permeability of coal reservoir and preservation conditions of CBM. Research shows that maceral and the degree of metamorphism of coal rock are key factors that control the generating and storing capacity of coal rock. Temperature, pressure and the content of mineral substance and water are also relevant to the storing capacity of coal rock. However, the permeability of coalbed is mainly controlled by fracture system of coal rock, which is relevant to the maturity of coal and the intensity of tectogenesis. The preservation of CBM pool is mainly controlled by the sealing capacity of roof and floor plate, tectonic activity and hydrodynamic environment. Because of its important role, we'd better strengthen the research on CBM pool forming conditions.

关 键 词：煤层气富集 煤岩 储气能力 渗透率 保存条件 温度 压力 灰分 水分 裂隙 构造活动 封盖能力 

分 类 号：P618.11[天文地球—矿床学]