用于低渗透油田的温差法高精度流量测井仪设计  

High Precision Flowmeter Design Based on Temperature Differential Measurement for Low Permeability Oilfield

作　　者：刘建成 陈强 戴卓勋 屈凡 王嘉婧 张继斌 LIU Jiancheng;CHEN Qiang;DAI Zhuoxun;QU Fan;WANG Jiajing;ZHANG Jibin(Production Logging Center, China Petroleum Logging CO. LTD., Xi’an, Shaanxi 710077, China)

机构地区：[1]中国石油集团测井有限公司生产测井中心,陕西西安710077

出　　处：《测井技术》2021年第1期46-49,55,共5页Well Logging Technology

基　　金：国家科技重大专项“多维高精度成像测井系列”(2017ZX05019001)。

摘　　要：为克服传统流量测井仪在低渗透油田使用的局限性,根据恒定功率与局部热扩散原理,运用24 bit高温高精度低噪声多通道模拟数字转化芯片,设计适用于低渗透注产剖面流量检测的恒流源对称结构电路与圆柱状探测器。通过室内模拟井实验装置,开展电路与探测器性能的验证。实验结果表明,温差式流量检测方案不受启动排量的限制,具有灵敏度高、结构简单、运行稳定可靠的特点,为低渗透油田流量精确检测提供全新的解决方案。In order to overcome the limitations of traditional flow logging tools in low permeability oilfields,based on the principles of constant power and local thermal diffusion,we use a 24 bit high temperature,high accuracy,low noise multi-channel analog-digital converter to design constant current source symmetrical structure circuit and cylindrical detector,which is suitable for low-permeability injection production profile.The experimental results show that the temperature difference flow detection scheme is not limited by the starting displacement,which also has the characteristics of high sensitivity,simple structure,stability and reliability.It provides a new solution for flow accurate detection of low permeability oilfield.

关 键 词：测井仪器 流量 温差 探测器 低渗透 注产剖面 检测电路 

分 类 号：P631.83[天文地球—地质矿产勘探]