岩芯自然电动势与阳离子交换量和水电阻率关系的研究

本文论述了岩芯自然电动势的测量原理以及测量系统逻辑及其设计原则,该系统采用微机控制,测量精度高、重现性好、速度快。本文还分別给出了由热力学与电化学两种方法导出的岩芯自然电动势的理论表达式,其计算结果与实验系统的测量结果吻合很好。该项研究的进一步开发,可为泥质砂岩储集层的含油饱和度和剩余油饱和度的解释提供重要参数。

STUDY ON RELATIONSHIPS AMONG THE SELF-POTENTIAL, ION EXCHANGE CAPACITY AND WATER RESISTIVITY OF SAMPLE CORE

This paper describes the measuring principle of self-potential, the logic circuit and design considerations of the measuring system. This system is controlled by a mlcro-computer, and shows characteristics of high accuracy, high reliability and high efficiency. The thoeretical expressions of self-potential derived from both thermodynamics and electrochemistry are given, and the calculated results are in resonable agreement with the laboratory measurment.Further studies on this project should provide key parameters for interpretation of oil and residual oil saturation of shaly sandstone reservoir bed.