低频条件下岩石孔隙水电容特性的蒸发实验研究
发布时间：2018-08-19 14:58
【摘要】：从束缚水、自由水的介电特性差异出发,测量相同几何尺寸岩样的电容值反映其介电特性,研究了一种新的岩石孔隙水分布状态分析方法并定量确定束缚水饱和度。采用岩石质量-电性参数自动测量系统实现岩石不同质量和不同频率下电容数据的连续采样。扫频测量的实验结果表明,100×103 Hz是一个比较理想的测量频率,该频率下水的分布状态对岩石电容-含水饱和度曲线的形态影响较大,岩石电容-含水饱和度曲线呈N形分布。将N形曲线上、下拐点作为吸附水、束缚水含量分界线来得到岩石吸附水和束缚水的饱和度。实验结果表明,采用介电实验研究岩石孔隙水分布状态的方法可行,并证明了岩石吸附水、微毛细管水和自由水具有不同的介电特性,且受测量频率和含水饱和度的影响。
[Abstract]:Based on the difference of dielectric properties of bound water and free water, the capacitance of rock samples of the same geometric size is measured to reflect its dielectric properties. A new method for analyzing the distribution of pore water in rocks is studied and the irreducible water saturation is quantitatively determined. The automatic measurement system of rock mass and electrical parameters is used to realize the continuous sampling of capacitance data with different rock mass and frequency. The experimental results show that 100 脳 103Hz is an ideal measurement frequency. The distribution of the frequency in water has a great influence on the shape of rock capacitance-water saturation curve, and the rock capacitance-water saturation curve is N-shaped. The inflexion point of N curve is used as the absorbing water and the bound water content is separated to get the saturation of the adsorbed water and the bound water. The experimental results show that it is feasible to study the distribution of pore water in rock by dielectric experiment, and it is proved that rock adsorbed water, microcapillary water and free water have different dielectric properties, and are affected by measuring frequency and water saturation.
【作者单位】： 吉林大学地球探测科学与技术学院;
【基金】：国家科技重大专项(2011ZX0504)资助~~
【分类号】：P631.81
[Abstract]:Based on the difference of dielectric properties of bound water and free water, the capacitance of rock samples of the same geometric size is measured to reflect its dielectric properties. A new method for analyzing the distribution of pore water in rocks is studied and the irreducible water saturation is quantitatively determined. The automatic measurement system of rock mass and electrical parameters is used to realize the continuous sampling of capacitance data with different rock mass and frequency. The experimental results show that 100 脳 103Hz is an ideal measurement frequency. The distribution of the frequency in water has a great influence on the shape of rock capacitance-water saturation curve, and the rock capacitance-water saturation curve is N-shaped. The inflexion point of N curve is used as the absorbing water and the bound water content is separated to get the saturation of the adsorbed water and the bound water. The experimental results show that it is feasible to study the distribution of pore water in rock by dielectric experiment, and it is proved that rock adsorbed water, microcapillary water and free water have different dielectric properties, and are affected by measuring frequency and water saturation.
【作者单位】： 吉林大学地球探测科学与技术学院;
【基金】：国家科技重大专项(2011ZX0504)资助~~
【分类号】：P631.81
【相似文献】
相关期刊论文 前8条
1 仵彦卿;岩石孔隙率随地层深度变化规律研究[J];西安理工大学学报;2000年01期
2 付大其;朱华银;刘义成;胡勇;;低渗气层岩石孔隙中可动水实验[J];大庆石油学院学报;2008年05期
3 王允诚;岩石孔隙空间的复制技术及其应用[J];石油实验地质;1980年02期
4 原海涵;用测井方法研究岩石孔隙的平均孔道半径[J];测井技术;1983年02期
5 肖立志,杜有如,叶朝辉;岩石孔隙表面流体弛豫强度和分子层特征厚度的观测[J];中国科学(A辑 数学 物理学 天文学 技术科学);1996年09期
6 ;地岅知媂第一卷~=目，
本文编号：2192001
本文链接：https://www.wllwen.com/kejilunwen/shiyounenyuanlunwen/2192001.html
