煤层气储层孔渗性评价研究  

Appraisal Study on CBM Reservoir Pore Permeability

作　　者：何晓辉[1] 赵荣[1] 谢立志[2] 

机构地区：[1]长江大学研究生学院,湖北荆州434023 [2]胜利油田黄河钻井公司,山东东营257000

出　　处：《中国煤炭地质》2011年第11期52-56,共5页Coal Geology of China

摘　　要：通过分析研究大量的辽河东部凹陷煤储层测井曲线可知,煤层气储层具有低体积密度、高声波时差、高补偿中子值、低自然伽马值、高电阻率值等特征;煤层孔隙度主要受煤的变质程度、埋藏深度、煤层厚度及显微组份等因素的控制。结合前人工作,给出了计算孔隙度和渗透率的方法。利用F-S方法,结合经验公式及达西定律推导得出的理论公式,对一些井进行了处理,得到了煤层处理剖面图。从剖面图上可看出,该区煤层的孔隙度和渗透率都很低,处理的孔隙度结果与测试结果基本吻合;另外,5号井煤层井段的单相注入压降测试结果表明其计算的渗透率也比较准确。Based on a mass of coal reservoir well-logging traces analyses and research in the eastern Liaohe depression,demonstrated that the reservoir has characteristics of low bulk density,high sonic differential time,high compensated neutron,low gamma-ray,high resistivity values.Coal seam porosity is mainly controlled by factors of coal metamorphism degree,buried depth,seam thickness and macerals.Combined with available data,has worked out methods to estimate porosity and permeability.The theoretical formula derived from F-S method combined with empirical formula and Darcy＇s law processed some well data and obtained coal seam processed section.From the section we can see,coal seams in the area all have low porosity and permeability,the processed porosity results are basically tally with tested results.Besides,the single-phase pressure drop tested results in the coal seam sector of No.5 well have demonstrated that the estimated permeability is also rather accurate.

关 键 词：孔隙度 渗透率 物性特征 测井解释 

分 类 号：P631.8[天文地球—地质矿产勘探]