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该文通过山西某勘查区自然伽马、三侧向电阻率、伽马伽马、声波时差等测井曲线的组合形态及其物性特征,对该区的煤岩层特性进行了测井曲线综合对比,其中2号和11号煤层曲线组合形态同为“W+V”型,除曲线幅值大小不同外,主要区别在于11号煤层底板有一层较厚的高放射性含量的含铝泥岩,自然伽马曲线反映为高幅值异常,9+10号煤层除“W+W”组合形态外,主要依据该煤层顶部一层较厚的K2石灰岩标志层来确定。实例表明利用测井曲线异常形态及组合特征,揭示了该区的煤层分岔、合并,煤层厚度变化,可有效进行煤岩层变化规律研究、层位划分以及断层的判定。
Based on the combination patterns of natural gamma ray, triaxial resistivity, gamma gamma ray and acoustic time difference in a prospecting area of Shanxi province and their physical characteristics, the logging curves of coal strata in this area were comprehensively compared The main difference between the curves of No.2 and No.11 coal seam is the “W + V” type. The main difference lies in that there is a thick layer of high-content aluminum-containing mudstone on the floor of No. 11 coal seam, The natural gamma curve is reflected as a high amplitude anomaly. The coal seam No. 9 + 10 is determined based on the thick K2 limestone marker layer at the top of the coal seam except for the “W + W” combination. The examples show that the abnormal patterns and the combination features of logging curves can reveal the bifurcation, merging and coal seam thickness variation of coal seams in this area, which can effectively study the variation law of coal rock formation, stratigraphic division and fault determination.