井下滑套阀开度检测系统设计与实现

发布时间：2018-06-19 04:15

  本文选题：井下滑套阀 + 位移传感器　； 参考：《西安石油大学》2017年硕士论文

【摘要】：通过在井下安装传感器和ICV(地层流体控制阀),智能井系统可以实时地监测地层油气藏的动态,并实现对地层流体的实时动态控制,故智能井能有效提高油气藏的开采效率和最终采收率,因此得到了广泛的重视。地层流体控制阀是智能井系统的关键,而阀门开度的实时自动检测则是实现阀门实时自动控制的前提。论文针对井下复杂环境,研制了一套滑套式地层流体控制阀开度检测系统,主要研究内容如下:1.对比分析了几种非接触式的位移检测原理,以LVDT(差动式位移检测传感器)位移检测传感器作为技术参考,提出了滑套阀开度检测传感器的结构设计,推导了阀门开度与传感器输出信号的关系,证明所设计的三线制电感式位移传感器的输出信号与阀门开度具有稳定的非线性关系;2.研制了一种三线制开度检测传感器,实验验证了所推导的输出信号与阀门开度的关系与实际情况是相符的,并依据实验结果对传感器的结构参数做了优化,对传感器和阀门进行了组合装配,验证了传感器结构设计的合理性;3.针对井下高温环境的特殊要求,为所研制的井下滑套阀开度检测传感器设计了信号处理装置,给出了电路原理和主要软件的设计说明;4.研究分析了阀门开度检测传感器的温度特性,建立了开度、温度和输出信号的关系方程,得出了信号将随温度的变化而非线性变化的结论,并通过测试试验和数值仿真作了进一步的验证;滑套阀开度检测系统信号处理电路的温度特性测试表明信号处理电路亦呈现非线性变化的特征;5.针对温度变化所导致的由测量信号不能直接计算得到开度值的问题,提出了一种线性逼近的简化处理方法,基于测试实验数据,每隔5℃建立了一个线性拟合方程,从而可以由测量信号解算得出较为准确的阀门开度值。采用实测数据对该近似处理方法的验算表明,阀门开度检测系统在20-125℃的温度范围内,阀门开度测量的最大相对误差不超过10%。这些研究工作为研制地层流体控制装置提供了实用参考。
[Abstract]:By installing sensors and ICV (formation fluid Control Valve) in the downhole, the intelligent well system can monitor the reservoir dynamics in real time and realize the real-time dynamic control of the formation fluid. Therefore, intelligent wells can effectively improve the recovery efficiency and final recovery of oil and gas reservoirs, so it has been widely paid attention to. The control valve of formation fluid is the key of intelligent well system, and the real-time automatic detection of valve opening is the premise to realize the real-time automatic control of valve. In view of the complex underground environment, this paper develops a set of sliding sleeve fluid control valve opening detection system, the main research contents are as follows: 1. Several non-contact displacement detection principles are compared and analyzed. The structure design of sliding sleeve valve opening detection sensor is presented with LVDT( differential displacement Detection Sensor) displacement detection sensor as the technical reference. The relationship between the valve opening and the output signal of the sensor is deduced. It is proved that the output signal of the three-wire inductive displacement sensor has a stable nonlinear relationship with the valve opening. A three-wire opening detection sensor is developed. The relationship between the output signal and the valve opening is verified to be consistent with the actual situation, and the structural parameters of the sensor are optimized according to the experimental results. The combination assembly of the sensor and the valve verifies the rationality of the sensor structure design. According to the special requirements of downhole high temperature environment, a signal processing device is designed for the developed downhole sliding casing valve opening detection sensor. The circuit principle and the main software design instructions are given. The temperature characteristic of valve opening detection sensor is analyzed, the relation equation of opening, temperature and output signal is established, and the conclusion is drawn that the signal will change nonlinear with the change of temperature. The temperature characteristics of the signal processing circuit of the slip-sleeve valve opening detection system show that the signal processing circuit also presents nonlinear characteristics. In order to solve the problem that the measurement signal can not directly calculate the opening value caused by the change of temperature, a simplified processing method of linear approximation is proposed. Based on the experimental data, a linear fitting equation is established every 5 鈩，

本文编号：2038385