本文關(guān)鍵詞：陣列式電阻持水率儀器研究　出處：《長(zhǎng)江大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 電阻法 持水率 陣列式 探針式傳感器 等效模型

【摘要】：在線檢測(cè)的持水率是原油開采過程中的重要決策參數(shù)。目前我國(guó)油田已進(jìn)入開采中后期,油田注水技術(shù)、水平井與大斜度井技術(shù)被廣泛使用,因此研究一種適用于高含水和大斜井的陣列化持水率檢測(cè)儀器具有重要意義。其難點(diǎn)主要在于將傳感器小型化,實(shí)現(xiàn)傳感器陣列化,實(shí)時(shí)檢測(cè)油井截面上流體持水率變化。針對(duì)上述問題,本文提出了一種適用于油水兩相分離流體、基于流體電阻的持水率檢測(cè)方法,推導(dǎo)了該方法的持水率計(jì)算公式,分析了電阻傳感器的等效模型。為了減少或避免電阻傳感器的雙層電容對(duì)測(cè)量結(jié)果的影響,實(shí)現(xiàn)相對(duì)準(zhǔn)確的局部流體電阻檢測(cè),采用了探針結(jié)構(gòu)的電阻傳感器,并通過MATLAB仿真計(jì)算得到了在雙極性脈沖激勵(lì)下最佳檢測(cè)時(shí)間點(diǎn),從而闡明了該方法的可行性。在此基礎(chǔ)上,(1)根據(jù)陣列電阻傳感器小型化的要求,設(shè)計(jì)了雙探頭式探針傳感器;(2)針對(duì)雙電層電容對(duì)測(cè)量結(jié)果的影響,采用了雙極性脈沖激勵(lì)的方法;(3)為了實(shí)現(xiàn)準(zhǔn)確地測(cè)量流體的電阻值,設(shè)計(jì)并實(shí)現(xiàn)了同時(shí)檢測(cè)傳感器兩端電壓和流經(jīng)傳感器電流的檢測(cè)方案。最終,形成并實(shí)現(xiàn)了基于流體電阻的持水率檢測(cè)儀器的總體方案。通過采用上述方案和措施,能大大減小雙層電容的影響,提高電阻的測(cè)量精度,可以相對(duì)準(zhǔn)確地實(shí)現(xiàn)對(duì)油水分離的兩相流體持水率的反演,達(dá)到了預(yù)期的技術(shù)指標(biāo)。綜上,本文的研究與工作解決了現(xiàn)階段陣列電阻法持水率檢測(cè)儀器的幾個(gè)關(guān)鍵技術(shù)難題,對(duì)陣列電阻法持水率檢測(cè)儀器的研究具有參考價(jià)值。
[Abstract]:On-line water holdup is an important decision parameter in the process of crude oil production. At present, oilfield water injection technology, horizontal well and high slope well technology have been widely used in the middle and late stage of oil production in China. Therefore, it is of great significance to study an arrayed water holdup measuring instrument suitable for high water cut and large inclined wells. The difficulty lies in the miniaturization of sensors and the realization of sensor array. In order to solve the above problems, a method of measuring water holdup based on fluid resistance for oil-water two-phase separation fluid is proposed in this paper. The formula of water holdup of this method is derived, and the equivalent model of resistance sensor is analyzed. In order to reduce or avoid the influence of double layer capacitance of resistance sensor on measurement results. A relatively accurate local fluid resistance detection is achieved by using a probe structure resistance sensor, and the optimal detection time point under bipolar pulse excitation is obtained by MATLAB simulation. The feasibility of the method is illustrated. On the basis of this, a dual-probe probe sensor is designed according to the requirement of miniaturization of the array resistive sensor. 2) aiming at the influence of the double layer capacitance on the measurement results, the bipolar pulse excitation method is adopted. 3) in order to measure the resistance of the fluid accurately, we design and realize the detection scheme of simultaneously detecting the voltage at both ends of the sensor and the current flowing through the sensor. The overall scheme of water holdup measuring instrument based on fluid resistance is formed and realized. By adopting the above scheme and measures, the influence of double layer capacitance can be greatly reduced, and the measuring accuracy of resistance can be improved. The inversion of water holdup of oil-water separated two-phase fluid can be realized relatively accurately, which reaches the expected technical target. The research and work of this paper have solved several key technical problems of the array resistance method water holdup measuring instrument at present, and have reference value to the research of the array resistance method water holdup measuring instrument.
【學(xué)位授予單位】：長(zhǎng)江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TE938;TP212

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