测井技术在煤层顶板岩层富水性评价中的应用

The Application of Well Logging Technology to Coal Seam Roof Strata's Water Abundance Assessment

测井曲线含有丰富的地质信息,而在煤田勘探中其主要用于判别层位,未能对测井信息全面利用。本文通过研究淮南某矿钻孔测井资料,综合利用视电阻率测井曲线和自然电位测井曲线,并结合研究区的地质构造情况,对11-2煤顶板的富水性进行评价。结果表明,测井技术对煤层顶板砂岩含水性评价具有针对性强、准确率高等特点,通过测井曲线响应异常可以初步预测岩层富水区域,为工作面探放水设计工作提供技术参考。

Well logging curve contains abundant geological information while it is mainly used for judging strata in coal field, which fails to take full advantage of it. Through the a- nalysis of drilling logging data of a mine in Huainan and a comprehensive utilization of ap parent resistivity logging curves and spontaneous potential logging curves, combined with the geological conditions of the study area, this paper evaluates the water abundance of 11--2 coal roof. The results show that logging technology in assessing water abundance of coal roof sandstone has the advantages of highly--targeted and high accuracy, etc. The ab- normal response of well logging curve can preliminarily predict water--rich regions, which provides technical reference for the working surface＇s prospecting and drainage design.