高温高压井下压力传感器的补偿与校正  

Compensation and calibration of the high temperature and pressure downhole pressure sensor

作　　者：党瑞荣[1] 张宏伟[1] 宋楠[1] 党博[1] 王登岳[1] 

机构地区：[1]西安石油大学光电油气测井与检测教育部重点实验室,西安710065

出　　处：《仪器仪表学报》2016年第4期737-743,共7页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51504194);国家科技重大专项(2011ZX05026-001)项目资助

摘　　要：潜油电泵、油藏监测、智能井等系统需要对井下压力进行长期在线监测，压力测试装置是其一个重要组成部分，是反映采油井实时状况的一个重要参数。井下温度随着深度的增加变化比较大，选用硅压阻式传感器存在温度漂移和线性误差，因此需要对压力传感器进行温度补偿和线性化校正。由于井下环境比较复杂，井下采集电路没有CPU进行处理，因此采用软件温度补偿与校正不易实现。经分析研究采用MAX1452信号调理芯片对压力传感器进行补偿与校正，能使压力传感器的精度达到0．1％。本文主要分析与研究MAX1452的补偿原理和实现方法，经试验分析得出经补偿校正后的系统在-40—125℃的温度范围内输出电流具有很好的线性度。Downhole pressure needs to be monitored by the electrical submersible pump, reservoir monitoring system and intelligent well system in long time, and the pressure testing device is an important part of it. It is important to reflect the real-time status of producing well. The temperature compensation and linearization calibration should be added on the pressure sensor because the downhole tempera- ture changes rapidly with the depth increasing. The temperature drift and linearity errors exist in the piezoresistive force sensor. Because of the complicated downhole environment and there is no CPU processing in the acquisition circuit, it＇ s difficult to realize the tempera- ture compensation with the software. Through the analysis and research, the circuit MAX1452 signal conditioning chip is used for com- pensation and calibration of pressure sensors, and the precision of the pressure sensor can reach 0.1%. The compensation principle and implementation methods are analyzed. After the experiment and analysis, it＇ s clear that the output current of the compensated system ex- hibits good linearity during the temperature range from -40- 125℃.

关 键 词：高温高压 潜油电泵 压力 温度补偿 MAX1452 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置] TH812.7[自动化与计算机技术—控制科学与工程]