论文部分内容阅读
前言在过去的20年里,例行地采用电缆测井来估计孔隙压力。霍特曼(Hottman)和约翰逊(Johson)等发展了基本的交会技术,这些技术至今仍是工业的标准。其主要根据是:岩石的孔隙度随着岩石的压实而降低。正常的压实势线可以通过观测的测井值的对数与深度的交会来确定。正常压实趋势线的偏差,被假设为由于异常压力而引起的,提出了一些关系式,以便将偏差值与压力梯度作对比。
Preface In the past two decades, cable logging was routinely used to estimate pore pressure. Hottman and Johson have developed basic rendezvous techniques that are still the industry standard to this day. The main basis is that the porosity of the rock decreases with the compaction of the rock. The normal compaction potential line can be determined by the intersection of logarithm and depth of observed logs. The deviations of the normal compaction trendline are assumed to be due to abnormal pressures and some relationships are proposed in order to compare the deviations with the pressure gradient.