Gansu Coal Geological Exploration Institute

工作区煤层结构复杂,对比难度大,为了综合反映煤层的空间分布形态,本次以地球物理测井为工作手段,划分全孔地质剖面,以及判断地层含水层和破碎带;利用声速(SAT)及密度(DNL)曲线进行地层岩石力学性质的计算,对所有煤层均用长源距伽玛伽玛、三侧向电阻率、自然伽玛三种以上1:50放大曲线进行分层定厚,以地球物理测井结合地质钻探确定研究区煤层厚度及煤层展布形态。

The coal seam structure in the work area is complex and difficult to compare. In order to comprehensively reflect the spatial distribution of the coal seam, geophysical well logging is used as the working method to divide the full hole geological profile and determine the stratum aquifer and fractured zone; using sound velocity (SAT) and density (DNL) curves to calculate the mechanical properties of stratum and rocks, all coal seams are layered and thickened using three or more 1:50 amplification curves: long distance gamma, three lateral resistivity, and natural gamma. Geophysical well logging combined with geological drilling is used to determine the thickness and distribution form of coal seams in the study area.