【摘要】：準(zhǔn)確測(cè)量油井中多相流的參數(shù)對(duì)于了解地層信息、制定開(kāi)采方案和油藏優(yōu)化處理都有著重要的意義。多相流的準(zhǔn)確測(cè)量是多年來(lái)國(guó)內(nèi)外的技術(shù)難題,除需要在理論方面需要建立精確的模型外,測(cè)試手段和方法也是一項(xiàng)重要的內(nèi)容。目前國(guó)內(nèi)外常用的方法是分離法和同位素放射源測(cè)量法。為了消除分離法在體積、成本方面的缺點(diǎn),以及同位素放射源對(duì)環(huán)境的輻射,本文采用了人工X射線(xiàn)技術(shù)檢測(cè)多相流,以X射線(xiàn)對(duì)物質(zhì)的識(shí)別能力為理論基礎(chǔ),采用了雙能級(jí)X射線(xiàn)測(cè)量多相流各相的相含率。在驗(yàn)證該方法可行的基礎(chǔ)上,設(shè)計(jì)了適用于多相流檢測(cè)的X射線(xiàn)系統(tǒng)實(shí)現(xiàn)方案。研究了雙能級(jí)X射線(xiàn)對(duì)多相流各相含率的測(cè)量原理,選用了特征譜分別為17.44keV和58.87keV的鉬靶(Mo)和鎢(W)靶光管作為多相流檢測(cè)系統(tǒng)的射線(xiàn)源。研制了該測(cè)量系統(tǒng)的硬件電路,它主要包括x射線(xiàn)發(fā)生裝置的可控電源電路模塊和基于FPGA的數(shù)據(jù)采集電路模塊,在完成各個(gè)電路模塊調(diào)試的基礎(chǔ)上,組裝了整個(gè)測(cè)量系統(tǒng),實(shí)現(xiàn)了適用于油氣水多相流的檢測(cè)。在室內(nèi)試驗(yàn)平臺(tái)上,利用所建立的X射線(xiàn)多相流檢測(cè)系統(tǒng),進(jìn)行了多組試驗(yàn)。分析試驗(yàn)數(shù)據(jù)可知,測(cè)量的絕對(duì)誤差不超過(guò)10%,證明了該測(cè)量系統(tǒng)的可行性、穩(wěn)定性和準(zhǔn)確性。
[Abstract]:Accurate measurement of the parameters of multiphase flow in oil wells is of great significance for understanding formation information, formulating production plans and optimizing reservoir processing. The accurate measurement of multiphase flow is a technical problem at home and abroad for many years. In addition to the need to establish accurate models in theory, testing methods and methods are also an important content. At present, the methods of separation and isotope radioactive source measurement are commonly used at home and abroad. In order to eliminate the disadvantages of the separation method in volume and cost, as well as the radiation of isotopic radioactive sources to the environment, this paper uses artificial X-ray technology to detect multiphase flow, which is based on the recognition ability of X ray to matter. The phase holdup of multiphase flow was measured by two-level X-ray. On the basis of verifying the feasibility of the method, an implementation scheme of X-ray system suitable for multiphase flow detection is designed. The principle of two-level X-ray measurement of phase holdup of multiphase flow is studied. Molybdenum target (Mo) and tungsten (W) target light tube with characteristic spectrum of 17.44keV and 58.87keV are selected as the ray source of multiphase flow detection system. The hardware circuit of the measurement system is developed. It mainly includes the controllable power circuit module of the x-ray generator and the data acquisition circuit module based on FPGA. On the basis of the debugging of each circuit module, the whole measurement system is assembled. The detection of oil-gas-water multiphase flow is realized. On the indoor test platform, the X-ray multi-phase flow detection system is used to carry out multi-group tests. The absolute error of the measurement is less than 10, which proves the feasibility, stability and accuracy of the system.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TE31;O434.19

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