地球物理测井的应用与研究——以郑双庙煤矿为例  

Application and research of geophysical logging:Taking Zhengshuangmiao Coal Mine as an example

作　　者：解攀龙 刘普 Xie Panlong;Liu Pu(Henan Zhuoyue Construction Engineering Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]河南卓越建设工程有限公司,河南郑州450000

出　　处：《能源与环保》2024年第8期86-91,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金项目(42072188)。

摘　　要：郑双庙煤矿是豫东地区较早被发现的晚古生界隐伏含煤地层,目前随着开采深度的不断增加,加之深部煤层的特征不明确,严重制约了矿山的生产与开采。基于此,通过对郑双庙煤矿开展地球物理测井的理论研究,为煤矿的进一步开采提供重要依据。研究表明,煤层具有较高的电阻率,幅值集中在50~270Ω·m,围岩与砂质泥岩的电阻率相对较低,集中在10~80Ω·m。此外,煤层的密度较小,集中在1.33~1.75 g/cm^(3),与煤层相比,围岩的密度相对较大,集中在2.13~2.81 g/cm^(3),总体上煤层与围岩表现出较为明显物性差异。研究发现,对于煤层厚度的界定,可依据短源距(GGNR)、三侧向电阻率(GR01)的数值进行分析,不同厚度的煤层表现出较为明显的参数特征,可作为煤层厚度判别的重要标志。在地球物理特征曲线上,侧向电阻率值比正常泥岩阻值低,伽马—伽马为低密度高幅值异常区域是破碎带的重要标志。Zhengshuangmiao Coal Mine is a late Paleozoic hidden coal-bearing stratum discovered earlier in eastern Henan Province.At present,with the continuous increase of mining depth and the unclear characteristics of deep coal seams,it seriously restricts the production and mining of mines.Based on this,theoretical research on geophysical logging in Zhengshuangmiao Coal Mine was conducted,which providing important basis for further mining of the coal mine.The research shows that the coal seam has a high resistivity,the amplitude is concentrated in the range of 50-270Ω·m,and the resistivity of surrounding rock and sandy mudstone is relatively low,concentrated in the range of 10-80Ω·m.In addition,the density of coal seam is relatively small,concentrated in the range of 1.33-1.75 g/cm^(3),and the density of surrounding rock is relatively large,concentrated in the range of 2.13-2.81 g/cm^(3).In general,the coal seam and surrounding rock have obvious physical property differences.Research has found that the definition of coal seam thickness can be analyzed based on the values of short source distance(GGNR)and three lateral resistivity(GR01).Coal seams of different thicknesses exhibit distinct parameter characteristics and can serve as important indicators for distinguishing coal seam thickness.On the geophysical characteristic curves,the lateral resistivity value is lower than that of normal mudstone,and the gamma-gamma anomaly region with low density and high amplitude is an important sign of the fracture zone.

关 键 词：地球物理测井 电阻率 物性差异 煤层厚度 

分 类 号：P631.81[天文地球—地质矿产勘探]