摘要
贵州兴达井田含煤9-17层,其中K1、K2、K3、K4四层煤较稳定,为主要可采煤层。依据钻孔资料,分析测井曲线形态与煤层顶底板以及上下标志层间的组合关系,对井田的煤岩层进行了对比。该井田K1煤层常分叉为K1上、K1下两个分层,其直接顶板高视电阻率异常,三叠系至K1煤层组间自上而下的缓坡状视电阻率曲线形态与自然伽马幅值相对较高的组合特征可作为二叠系含煤地层与三叠系地层划分依据;K2煤层位于龙潭组顶部,下距长兴组灰岩标志层10m左右,煤层本身高伽马异常;K3、K4煤层及其底板具较高的自然伽马特征。
The coal-bearing strata in the Xingda minefield contain 9-17 coal seams, in which, coal seams K1, K2, K3 and K4 are rather stable, thus main mineable coal seams. Based on drilling data, analyzed logging traces configuration and combination relations between coal roof, floor and upper, lower marker beds carried out minefield coal seams and rock strata correlation. The coal seam K 1 is frequently split into two slices K1U and K1L, its immediate roof presents high apparent resistivity anomaly. Between Triassic System and coal seam K1, combined features of gently slopped apparent resistivity trace configuration from top to bottom and gamma-ray amplitude relatively high can be the partition standard for Permian coal-bearing strata and Triassic strata. Coal seam K2 is situated in the top part of the Longtan Formation, above the marker bed Changxing Formation limestone about 10m, the coal seam is in possession of high gamma anomaly; while coal seams K3 and K4 rather high gamma-ray traces.
出处
《中国煤炭地质》
2014年第7期78-81,共4页
Coal Geology of China
关键词
测井曲线
煤岩层对比
兴达井田
logging trace
coal seams and rock strata correlation
Xingda minefield
