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龙凤煤矿含煤地层为海陆交互相的上二叠统龙潭组,含4号、5号、9号和13号四层可采煤层,其中5号煤层和9号煤层间距较小,煤层特征差异不明显,部分钻孔5号煤层和9号煤层的对比难度较大。根据所掌握的地质资料,结合测井成果,总结出该矿区所特有的测井曲线特征:煤系地层龙潭组的上覆地层夜郎组和长兴组分界处自然伽马和视电阻率曲线界面陡直特征;5号煤层顶板的自然伽马高异常与9号煤层底板的自然伽马高异常特征;13号煤层顶板的自然伽马高异常与15号煤层相对高自然伽马异常特征;15号煤层下伏地层茅口灰岩陡直视电阻率与自然伽马曲线特征。依据其测井曲线,准确的划分出二较厚煤层(约4m)、而相距仅6m的5煤层与9煤层。
The Longfeng coal-bearing strata in Longfeng Mine are the Upper Permian Longtan Formation with sea-land interaction facies, including the 4th, 5th, 9th and 13th recoverable coal seams, of which the No.5 and the No.9 coal seams are smaller and the coal seam features The difference is not obvious, some of the drilling of No. 5 seam and No. 9 seam more difficult to compare. Based on the available geological data and logging results, the characteristics of the well logging curve are summarized: the natural gamma ray and apparent resistivity curve interface of Yelang and Changxing formations in the overlying strata of the Longtan formation in the coal measures strata Steep features; natural gamma ray anomaly of No.5 coal seam roof and natural gamma ray anomaly of No.9 seam floor; natural gamma ray anomalies of No.13 coal seam roof and relatively high natural gamma anomaly of No.15 coal seam; Steep apparent apparent resistivity and natural gamma ray curve of Maokou limestone in underlying coal seam. According to its well logging curve, two thick coal seams (about 4m) are accurately divided, while the 5th and 9th seams are only 6m apart.