延川南区块山西组2号煤层气富集高产地质规律研究  

Study on Geological Regulations of Coalbed Methane Enrichment and Fine Performance for No.2 Coal Seam in Shanxi Formation of Yanchuannan Block

作　　者：王立志[1] 刘常青[2] 邓玉胜[2] 王运海[2] 

机构地区：[1]中国石化华东分公司物探研究院,江苏210000 [2]中国石化华东分公司石油勘探开发研究院,江苏210000

出　　处：《中国煤层气》2014年第6期16-19,共4页China Coalbed Methane

摘　　要：通过对延川南区块山西组2号煤层生烃能力、储层物性、保存条件等煤层气基本地质条件的研究,认为延川南2号煤层气富集高产主要受水动力条件与储层物性控制。进一步分析认为:弱径流-滞留水动力条件创造了煤层气富集环境,局部构造高点裂隙发育有利于获得较高静态渗透率,原生-碎裂结构煤提供了良好力学强度,适中的储层压力与较强的吸附性能是优异动态渗透性的关键。基于GIS综合评价方法,评价出有利区面积181.64km^2,为指导该区煤层气进一步勘探和开发提供科学依据。Based on studying the No.2 coal seam in terms of producing hydrocarbon capability,reservoir properties and preservations in Shanxi Formation of Yanchuannan Blocks,it is concluded that coalbed methane accumulation and high yield in the block are mainly controlled by the hydrology and reservoir properties.The paper further proposes that,weak runoff-stranded ground water in the coal seam creates an enriched environment,local structural highlands underground are inclined to come widi permeable fractures,unreformed and fragmented coal structures provide good mechanical strength,moderate reservoir pressure and strong adsorption performance are the keys to excellent dynamic permeability.Comprehensive evaluation based on GIS is used to screen out the favorable exploration targets with an area of181.64 km.The methodology proposed in the paper is valuable for GBM exploration and development in the near future.

关 键 词：煤层气 水文地质 煤体结构 静态渗透率 动态渗透率 

分 类 号：P618.13[天文地球—矿床学]