This paper is based on practical drilling data of drilled irruptive rock body in western sha segment of huimin depression , rock body subfacies in this phrase and seismic , electric logging features in pyrolysis metamorphic belt are analyzed , so as to summarize a set of practical methods , which identify drilled various subfacies and irruptive rock top and bottom boundary by cuttings log and drill time logging 本文以惠民凹陷西部沙三段已钻遇侵入岩体的实钻资料为依据，尝试性地对沙三段侵入岩体各亚相带及热解触变质带的地震、电测响应特征进行研究，总结出一套较为实用的通过岩屑录井、钻时录井手段识别所钻遇的各亚相带和进行侵入岩体顶、底界卡定方法，现场应用效果很好。
Several numerical experiments are carried out to detect the actual steps and limitation for the velocity and depth parameter ' s ray inversion in the fourth chapter , and the we find that : a . the resolution capability of the layer ' s velocity change along both the top and bottom boundary is very poor . thus generally the vertical homogeneous layer model whose top velocity equal to that of its bottom boundary should be considered 本文的第四章通过一系列模型试验详细探讨了利用射线反演方法反演速度和深度参数的实际步骤，认为走时反演对速度层内顶部和底部速度变化的分辨能力很弱，仅仅依靠走时数据难以反演出层内顶部和底部的速度变化，故一般情况下应采用速度层底部和顶部速度相同的纵向均匀模型。
