發(fā)布時(shí)間：2018-08-03 21:05

【摘要】：高溫高壓三維物理模擬裝置用于油藏地層條件下復(fù)雜驅(qū)動(dòng)體系的滲流規(guī)律和宏觀波及機(jī)理等試驗(yàn)研究。在驅(qū)替試驗(yàn)過(guò)程中實(shí)時(shí)監(jiān)測(cè)巖芯內(nèi)部各相流體的動(dòng)態(tài)分布情況是試驗(yàn)的關(guān)鍵內(nèi)容之一。本文旨在設(shè)計(jì)開(kāi)發(fā)一套用于三維膠結(jié)物理模擬裝置的聲場(chǎng)測(cè)試平臺(tái),利用超聲透射檢測(cè)的方式來(lái)監(jiān)測(cè)驅(qū)替試驗(yàn)過(guò)程中各相流體的動(dòng)態(tài)分布。首先根據(jù)物理模型裝置的工藝要求和測(cè)控需求,明確了聲場(chǎng)測(cè)試平臺(tái)的設(shè)計(jì)指標(biāo)和主要功能,確定整體設(shè)計(jì)方案。然后采用美國(guó)國(guó)家儀器公司(National Instruments,NI)的虛擬儀器技術(shù),選用PXI模塊化硬件平臺(tái)和Lab VIEW2012圖形化軟件開(kāi)發(fā)平臺(tái)實(shí)現(xiàn)系統(tǒng)的硬件和軟件設(shè)計(jì),實(shí)現(xiàn)整個(gè)試驗(yàn)過(guò)程和試驗(yàn)數(shù)據(jù)處理的自動(dòng)化。聲場(chǎng)測(cè)試平臺(tái)的設(shè)計(jì)方案為采用一發(fā)一收方式(或一發(fā)多收方式)對(duì)巖芯進(jìn)行超聲波掃描,然后根據(jù)每個(gè)超聲波接收探頭檢測(cè)到的超聲波信號(hào),計(jì)算超聲波在物理模型中的傳播速度以及衰減系數(shù),最終反演成像得到物理模型內(nèi)部的流體分布。設(shè)計(jì)方案中硬件設(shè)計(jì)主要包括超聲發(fā)生單元、超聲接收單元和中央控制單元的設(shè)計(jì)。軟件設(shè)計(jì)采用模塊化思想,分為初始化模塊、參數(shù)設(shè)置模塊、聲場(chǎng)測(cè)試模塊、歷史數(shù)據(jù)查看模塊等。通過(guò)硬件系統(tǒng)和軟件系統(tǒng)的結(jié)合,實(shí)現(xiàn)了聲場(chǎng)測(cè)試平臺(tái)的多模塊同步和高速數(shù)據(jù)采集、傳輸?shù)裙δ堋Ｗ詈笸ㄟ^(guò)進(jìn)行聲場(chǎng)測(cè)試前期試驗(yàn),確定聲場(chǎng)測(cè)試平臺(tái)裝置的最佳激勵(lì)信號(hào)的脈寬為換能器中心頻率對(duì)應(yīng)周期的1/2的方波脈沖信號(hào),為后期的巖芯聲場(chǎng)測(cè)試試驗(yàn)提供實(shí)驗(yàn)基礎(chǔ)。
[Abstract]:The high temperature and high pressure 3D physical simulation device is used to study the percolation law and macroscopic sweep mechanism of complex driving system in reservoir formation. It is one of the key contents to monitor the dynamic distribution of fluid in core in real time during displacement test. The purpose of this paper is to design and develop a sound field test platform for 3D cementing physical simulation device, and to monitor the dynamic distribution of each phase fluid in displacement test by ultrasonic transmission detection. Firstly, according to the requirements of the physical model device, the design indexes and main functions of the acoustic field test platform are defined, and the overall design scheme is determined. Then, using the virtual instrument technology of National Instruments Corporation (National), the hardware and software design of the system is realized by using the PXI modular hardware platform and the Lab VIEW2012 graphical software development platform, which realizes the automation of the whole experiment process and the test data processing. The design scheme of the sound field test platform is to scan the core with ultrasonic wave in one send and one receiving mode (or more than one transmission), and then according to the ultrasonic signal detected by each ultrasonic receiving probe, The velocity and attenuation coefficient of ultrasonic wave propagation in the physical model are calculated, and the fluid distribution inside the physical model is obtained by inversion imaging. The hardware design includes ultrasonic generating unit, ultrasonic receiving unit and central control unit. The software design adopts the idea of modularization, which is divided into initialization module, parameter setting module, sound field testing module, historical data viewing module and so on. Through the combination of hardware system and software system, the multi-module synchronization and high-speed data acquisition and transmission functions of the acoustic field test platform are realized. Finally, through the pre-test of sound field test, it is determined that the pulse width of the optimum excitation signal of the acoustic field test platform is 1 / 2 square wave pulse signal of the corresponding period of the transducer central frequency, which provides the experimental basis for the later core sound field test.
【學(xué)位授予單位】：中國(guó)石油大學(xué)(華東)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TE311;TB559

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1 劉卓;高溫高壓聲場(chǎng)測(cè)試平臺(tái)設(shè)計(jì)[D];中國(guó)石油大學(xué)(華東);2014年

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本文編號(hào)：2162992