石油物探2017，Vol.56Issue(2)：185-191,7.DOI:10.3969/j.issn.1000-1441.2017.02.004
低频条件下岩石孔隙水电容特性的蒸发实验研究
The capacitance characteristics of porous rock with evaporation experiment method under low frequency condition
摘要
Abstract
The irreducible water saturation is usually obtained with centrifugation method,phase permeability experiment,semipermeable membrane method and sealed coring.In the term of rock electricity,they are not bound water saturation parameters involved in double-water and three-water model in well logging interpretation.In this article,a new method is tested to get rock pore water distribution properties based on dielectric property difference of free water and bound water.Rock weight and capacitance data is continuous sampled using rock weight-electric parameter automatic measurement system.Measurement results show that 100 kHz data is ideal,water distribution difference is obvious at the frequency,and the rock capacitance-water saturation curve is in the shape of N.We use up-inflection-point and down-inflection-point of N-shape curve to partition adsorption water and bound water saturation of porous rock.Our data proved that adsorption water,capillary water and free water have different dielectric properties and it's influenced by measuring frequency and water saturation.Our data shows that this method is useful to study rock pore water distribution.Since the exploration and development target of oil field inclined to be low permeability,low porosity and low resistivity with high bound water and adsorption water saturation,complex pore texture and complex conductive properties,our experiment research will play a great role in the interpretation of low permeability,low porosity and low resistivity reservoir for threewater model.关键词
岩石/电容/介电/束缚水/束缚水饱和度Key words
rock/capacitance/dielectric/bound water/bound water saturation分类
天文与地球科学引用本文复制引用
潘保芝,栗猛,张丽华,郭宇航,刘文斌,郭怀志..低频条件下岩石孔隙水电容特性的蒸发实验研究[J].石油物探,2017,56(2):185-191,7.基金项目
国家科技重大专项(2011ZX0504)资助.This research is financially supported by National Science and Technology Major Project of China (Grant No.2011ZX0504). （2011ZX0504）
