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在煤田地质勘探中应用测井曲线划分煤、岩层,确定煤层埋藏深度、厚度及结构,已成为不可缺少的手段。为了进一步提高分层定厚的精度,不少兄弟单位先后作过微分测井、侧向测井、侧向梯度等新方法试验。一九七五年邢台测井会议后,我们也大力推广了这些方法,并在生产实践中取得了较好的效果,为在我区开展无芯钻进创造了有利条件。但是,我们在测井过程中体会到,测井任务加大,新方法逐渐增多,必然增加现场工作量及劳动强度,延长观测时间。孔内情况比较顺利时,每孔至少要下两次井下仪器。同时测
It has become an indispensable means to divide coal and rock strata by well logging curves and determine the depth, thickness and structure of coal seam in coalfield geological prospecting. In order to further improve the accuracy of layering, a lot of brother units have done differential logging, lateral logging, lateral gradient and other new methods of testing. After the Xingtai Logging Conference in 1975, we also vigorously promoted these methods and achieved good results in production practices, creating favorable conditions for coreless drilling in our region. However, during the well logging process, we realized that as the well logging tasks increase and the new methods gradually increase, it is inevitable to increase the on-site workload and labor intensity and prolong the observation time. Well when the hole is relatively smooth, at least two downhole equipment per hole. Simultaneous measurement