本文選題：震電效應(yīng) + 震電耦合��； 參考：《電子科技大學(xué)》2015年碩士論文

【摘要】：在最近些年來(lái),震電效應(yīng)的實(shí)驗(yàn)研究逐漸開展并受到關(guān)注,在地球資源勘探及地球科學(xué)領(lǐng)域,尤其是油氣水的開發(fā)的應(yīng)用潛力巨大,促使國(guó)內(nèi)外學(xué)者投入大量精力從事該項(xiàng)研究。此外,震電效應(yīng)在石油勘探方面對(duì)于“剩余油”的尋找,前景十分誘人,相比其它方法,具有可直接探測(cè)地下的油氣水含量和探測(cè)地層裂縫帶敏感且方便的特點(diǎn)。本文對(duì)目前的震電效應(yīng)的產(chǎn)生機(jī)制和原理進(jìn)行了概述,并介紹了室內(nèi)震電效應(yīng)實(shí)驗(yàn)的系統(tǒng)搭建,同時(shí),也介紹了系統(tǒng)內(nèi)部干擾的消除和系統(tǒng)各部分的設(shè)計(jì)和選擇,并結(jié)合了實(shí)驗(yàn)數(shù)據(jù)得到了震電效應(yīng)的相關(guān)結(jié)論,最后提出了課題研究仍需面對(duì)的挑戰(zhàn)和思路。本文對(duì)震電效應(yīng)的基本原理進(jìn)行了闡述和總結(jié),并重點(diǎn)介紹了雙電層現(xiàn)象,涉及到了震電效應(yīng)的相關(guān)因素。從Pride彈性波—電磁波耦合方程組出發(fā),導(dǎo)出無(wú)源均勻孔隙介質(zhì)中的震電耦合波通解表達(dá)式,為模擬震電效應(yīng)測(cè)井響應(yīng),推導(dǎo)出聲源在模擬井中激發(fā)聲波時(shí)井內(nèi)電磁場(chǎng)和聲場(chǎng)的計(jì)算表達(dá)式以及地層孔隙介質(zhì)中耦合的聲場(chǎng)和電磁場(chǎng)的計(jì)算表達(dá)式。最后,根據(jù)震電耦合方程組的邊界條件確定井內(nèi)井外各個(gè)波場(chǎng)的系數(shù),利用波場(chǎng)表達(dá)式模擬震電效應(yīng)的測(cè)井曲線響應(yīng)。本文介紹了理論上震電效應(yīng)室內(nèi)實(shí)驗(yàn)的設(shè)計(jì),包括試驗(yàn)系統(tǒng)各個(gè)部分的設(shè)計(jì)和選擇,并做了相關(guān)總結(jié)和討論。主要針對(duì)本研究過(guò)程中試驗(yàn)系統(tǒng)的搭建遇到的相關(guān)問(wèn)題,進(jìn)行了分析和解決,最終完善了震電效應(yīng)的室內(nèi)實(shí)驗(yàn)系統(tǒng)設(shè)計(jì)。通過(guò)相關(guān)實(shí)驗(yàn)測(cè)得數(shù)據(jù),著重分析了震電效應(yīng)中聲源和接收天線在不同實(shí)驗(yàn)條件下的震電信號(hào),并通過(guò)對(duì)比得出初步的實(shí)驗(yàn)結(jié)論。在震電效應(yīng)室內(nèi)實(shí)驗(yàn)的基礎(chǔ)上,通過(guò)數(shù)據(jù)分析、實(shí)驗(yàn)對(duì)比等方法得出震電效應(yīng)的相關(guān)結(jié)論。在震電效應(yīng)實(shí)驗(yàn)中,聲信號(hào)的激勵(lì)和震電信號(hào)的接收是其重要部分。對(duì)于聲信號(hào)的激勵(lì),要在保證聲信號(hào)的強(qiáng)度下,盡可能的減小輻射信號(hào)的拖尾,從而更加準(zhǔn)確的測(cè)得震電信號(hào)的起始位置。其中,震電信號(hào)的初始位置對(duì)震電信號(hào)的時(shí)延和震電信號(hào)的最小可測(cè)試距離的計(jì)算等有著重要作用。震電信號(hào)的接收天線要求是在保證接收性能的基礎(chǔ)上,尺寸盡可能的小。
[Abstract]:In recent years, the experimental study of seismoelectric effect has been gradually carried out and paid close attention to. It has great application potential in the field of earth resource exploration and earth science, especially the exploitation of oil, gas and water. To encourage domestic and foreign scholars to devote a great deal of energy to this research. In addition, the exploration of "remaining oil" by seismoelectric effect has a very attractive prospect. Compared with other methods, it can be used to directly detect the oil, gas and water content in the ground and the sensitive and convenient characteristics of detecting the formation fracture zone. In this paper, the mechanism and principle of the current seismoelectric effect are summarized, and the system construction of the indoor seismoelectric effect experiment is introduced. At the same time, the elimination of the system internal interference and the design and selection of the various parts of the system are also introduced. Combined with the experimental data, the conclusions of the seismoelectric effect are obtained, and finally, the challenges and ideas of the subject research are put forward. In this paper, the basic principle of seismoelectric effect is expounded and summarized, and the phenomenon of double layer is introduced emphatically, which involves the related factors of seismoelectric effect. Based on the Pride coupled equations of elastic wave and electromagnetic wave, the general solution expression of seismic coupled wave in passive homogeneous porous media is derived, which is used to simulate the well logging response of seismoelectric effect. The expressions of electromagnetic field and sound field in the well when the sound source excites sound wave in the simulated well and the expression of the coupling sound field and electromagnetic field in the formation pore medium are derived. Finally, according to the boundary conditions of the coupled seismoelectric equations, the coefficients of each wave field in and out of the well are determined, and the log curve response of the seismoelectric effect is simulated by using the wave field expression. This paper introduces the theoretical design of the laboratory experiment of seismoelectric effect, including the design and selection of each part of the test system, and makes the relevant summary and discussion. This paper analyzes and resolves the related problems encountered in the construction of the experimental system, and finally consummates the design of the laboratory experimental system for the shock and electrical effect. Based on the experimental data, the electrical signals of the sound source and the receiving antenna in the seismoelectric effect under different experimental conditions are analyzed, and the preliminary experimental conclusions are obtained by comparison. On the basis of the laboratory experiment of seismoelectric effect, the relevant conclusions of seismoelectric effect are obtained by means of data analysis and experimental comparison. In the experiment of seismoelectric effect, the excitation of acoustic signal and the receiving of seismoelectric signal are important parts of the experiment. For the excitation of the acoustic signal, we should reduce the tail of the radiation signal as much as possible under the guarantee of the intensity of the acoustic signal, so as to measure the starting position of the seismic signal more accurately. Among them, the initial position of the seismic signal plays an important role in the calculation of the delay of the electrical signal and the calculation of the minimum testable distance of the electrical signal. The receiving antenna of seismic signal is required to ensure the receiving performance and the size is as small as possible.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P631.3;P631.4

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