基于热传导时域积分的井下流量测量方法
PETROLEUM DRILLING TECHNIQUES（2023）
长江大学电子信息学院
Abstract
针对油田低产液生产井流量测量困难的问题,根据多相流体热力学理论,利用整个测量周期内探测器周围流体冲刷引起的热传导效应,提出了 一种基于热传导时域积分的井下流量测量方法.首先,采用间歇式恒功率加热的方式,给探测器提供周期性能量;然后,采用积分法计算和分析了探测器内部温度在升温和降温过程中随外界流体流量变化的规律.理论分析与试验结果表明,时域积分面积与流量呈极好的相关性,尤其在低流量条件下具有较高的分辨率,该方法解决了传统涡轮流量计在流量较低情况下因涡轮无法启动导致失去检测能力的问题.基于热传导时域积分的井下流量测量方法,促进了油水两相流检测技术的发展,为低产液井流量测量提供了 一种新的技术手段.
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Key words
low-productivity well,flow rate measurement,heat conduction,time domain integration,intermittent constant power
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