本文選題：井下滑套閥 + 位移傳感器�。� 參考：《西安石油大學(xué)》2017年碩士論文

【摘要】：通過(guò)在井下安裝傳感器和ICV(地層流體控制閥),智能井系統(tǒng)可以實(shí)時(shí)地監(jiān)測(cè)地層油氣藏的動(dòng)態(tài),并實(shí)現(xiàn)對(duì)地層流體的實(shí)時(shí)動(dòng)態(tài)控制,故智能井能有效提高油氣藏的開(kāi)采效率和最終采收率,因此得到了廣泛的重視。地層流體控制閥是智能井系統(tǒng)的關(guān)鍵,而閥門(mén)開(kāi)度的實(shí)時(shí)自動(dòng)檢測(cè)則是實(shí)現(xiàn)閥門(mén)實(shí)時(shí)自動(dòng)控制的前提。論文針對(duì)井下復(fù)雜環(huán)境,研制了一套滑套式地層流體控制閥開(kāi)度檢測(cè)系統(tǒng),主要研究?jī)?nèi)容如下:1.對(duì)比分析了幾種非接觸式的位移檢測(cè)原理,以LVDT(差動(dòng)式位移檢測(cè)傳感器)位移檢測(cè)傳感器作為技術(shù)參考,提出了滑套閥開(kāi)度檢測(cè)傳感器的結(jié)構(gòu)設(shè)計(jì),推導(dǎo)了閥門(mén)開(kāi)度與傳感器輸出信號(hào)的關(guān)系,證明所設(shè)計(jì)的三線制電感式位移傳感器的輸出信號(hào)與閥門(mén)開(kāi)度具有穩(wěn)定的非線性關(guān)系;2.研制了一種三線制開(kāi)度檢測(cè)傳感器,實(shí)驗(yàn)驗(yàn)證了所推導(dǎo)的輸出信號(hào)與閥門(mén)開(kāi)度的關(guān)系與實(shí)際情況是相符的,并依據(jù)實(shí)驗(yàn)結(jié)果對(duì)傳感器的結(jié)構(gòu)參數(shù)做了優(yōu)化,對(duì)傳感器和閥門(mén)進(jìn)行了組合裝配,驗(yàn)證了傳感器結(jié)構(gòu)設(shè)計(jì)的合理性;3.針對(duì)井下高溫環(huán)境的特殊要求,為所研制的井下滑套閥開(kāi)度檢測(cè)傳感器設(shè)計(jì)了信號(hào)處理裝置,給出了電路原理和主要軟件的設(shè)計(jì)說(shuō)明;4.研究分析了閥門(mén)開(kāi)度檢測(cè)傳感器的溫度特性,建立了開(kāi)度、溫度和輸出信號(hào)的關(guān)系方程,得出了信號(hào)將隨溫度的變化而非線性變化的結(jié)論,并通過(guò)測(cè)試試驗(yàn)和數(shù)值仿真作了進(jìn)一步的驗(yàn)證;滑套閥開(kāi)度檢測(cè)系統(tǒng)信號(hào)處理電路的溫度特性測(cè)試表明信號(hào)處理電路亦呈現(xiàn)非線性變化的特征;5.針對(duì)溫度變化所導(dǎo)致的由測(cè)量信號(hào)不能直接計(jì)算得到開(kāi)度值的問(wèn)題,提出了一種線性逼近的簡(jiǎn)化處理方法,基于測(cè)試實(shí)驗(yàn)數(shù)據(jù),每隔5℃建立了一個(gè)線性擬合方程,從而可以由測(cè)量信號(hào)解算得出較為準(zhǔn)確的閥門(mén)開(kāi)度值。采用實(shí)測(cè)數(shù)據(jù)對(duì)該近似處理方法的驗(yàn)算表明,閥門(mén)開(kāi)度檢測(cè)系統(tǒng)在20-125℃的溫度范圍內(nèi),閥門(mén)開(kāi)度測(cè)量的最大相對(duì)誤差不超過(guò)10%。這些研究工作為研制地層流體控制裝置提供了實(shí)用參考。
[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，

本文編號(hào)：2038385