摘要
在油气生产井的多相流动中,通常利用电容法含水率计识别水和油气混合物。本文从仪器结构及测量原理出发,认为仪器的测量电容(C)与持水率(Y_w)之间的响应关系受地层水矿化度及分布状态制约,高矿化度时,仪器在泡状流动中将失去分辨水和油气混合物的能力。本文提出了新的响应方程,并指出,取样式电容法含水率计是一种很有发展前途的仪器,所给出的实验数据证实了上述观点。取样式电容法含水率计适用于淡水也适用于盐水,其仪器响应与持水率呈线性关系,但测量时间应大于稳定时间。
In multiphase flow of production well, fluid capacitance instrument usually can be used for distinguishing water from hydrocarbon. Based on the geometry and principle of the fluid capacitance instrument, a new response equation is presented in this paper. It is pointed out that the relation of capacitance to water holdup is subject to water salinity, and in high salinity water, the instrument misses the ability to distinguish water from the mixture of oil and gas. The experiment demonstrate the dependability of the equation. Sample capcitance water-cut tool can be used for fresh water well or saline water well, and the response is linear with water hold up. but measurement time should be longer than steady time.
出处
《江汉石油学院学报》
CSCD
北大核心
1991年第1期33-37,共5页
Journal of Jianghan Petroleum Institute
关键词
生产测井
电测井
电容法
production logging
well log interpretation
multiphase flow
capacitance
water oil ratio
surveying equipment
