贵州安家寨煤矿龙潭组煤层特征及对比

为了分析安家寨煤矿龙潭组煤层特征,通过采用标志层、测井曲线、沉积旋回进行综合对比,揭示出该区龙潭组含煤地层受沉积环境的控制较为明显,表现为不同期次的退积层序,导致多层煤产出。通过对比,各煤层的总体特征清楚,连接性好。在标志层方面,选择厚度较稳定的泥质灰岩、铝质泥岩作为标志层;在无岩性标志层的层段,则根据岩性组合及粒度变化选择标志层。测井曲线方面,主要根据测井曲线的幅度异常、形态异常及特殊形态组合关系等划分煤层。综合岩性与测井曲线的对比,划分出4个沉积主旋回,分析各主沉积旋回特征,推测出该区成煤环境。

Features and Comparison on Longtan Group Seam in Anjiazhai Mine in Guizhou Province

In order to analyze the features of Longtan group seam in Anjiazhai Mine,the key bed,logging curve and depositional cycle were applied to the comprehensive comparison,the coal measures strata in Longtan group obviously controlled by the deposition environment were revealed,the exposures would be the different periodic retrograding sequence and multi seams were occurred.With the comparison,the general features of each seam were clear and the linkage was good.As for the key bed,the muddy limestone and the alu...