摘要
龙潭组是金沙井田的主要含煤地层,含煤达12～15层,其中7、8、9、11、12五层煤较稳定,为主要可采煤层。根据测井物性曲线与地质岩心的对比分析,总结出该组煤岩层的共有测井物性规律:低密度、中低电阻率、较高中子孔隙度和较低的纵波速度,以及其特有规律如:5、6、7、8、9煤层的低自然伽马,11、12煤层较高的自然伽马等特征。结合煤层测井曲线形态特征及其与顶、底板以及和煤层上、下标志层间组合关系,进行了全煤系地层的对比,揭示了该井田煤层的分岔、合并、冲刷、沉缺、煤层厚度等变化规律。
Longtan Formation is the main coal-bearing strata in Jinsha minefield, contains 12-15 coal seams. Among them, five main mineable coal seams of Nos.7, 8, 9, 11 and 12 are rather stable. Through correlation and analysis of well logging physical property curves and core geological logging, summed up the common well logging pattern of coal seams and strata： low density, medium to low resistivity, higher neutron porosity and lower longitudinal wave velocity, as well as coal seams＂ proper characteristics such as： low natural gamma of Nos.5, 6, 7, 8 and 9 coal seams; higher natural gamma of Nos.ll and 12 coal seams. In combination with coal seam well logging curve configuration characteristics and composite relation of coal seam roof and floor, marker beds above and beneath coal seams, carried out general coal-bearing strata correlation, unveiled varying patterns of coal seam splitting, merging, scouring, depositional hiatus and thickness changing in the minefield.
出处
《中国煤田地质》
2006年第3期62-64,共3页
Coal Geology of China
关键词
测井对比
煤岩层
物性特征
龙潭组
Longtan Formation
coal seam and strata
physical property
well logging correlation
