【摘要】：井中地震技術(shù)是一項新型物探技術(shù),可以獲得極高分辨率的地震信號,因此可以勘探得到井間構(gòu)造與儲層等小尺度地質(zhì)目標(biāo)的精細(xì)成像,為油氣開采提供新的精細(xì)探測工具。井中地震技術(shù)的發(fā)展很大程度上依賴于震源的發(fā)展,本文提到的脈沖式井下震源是一種新型重錘震源,采用圓筒型直線電動機作為地震波的激發(fā)源,可以產(chǎn)生足夠能量的寬頻帶、多種地震波,與傳統(tǒng)的井下重錘震源相比,具有結(jié)構(gòu)簡單、可控性高、工作深度更大等優(yōu)點。本文針對該脈沖式井下震源的控制系統(tǒng)進(jìn)行了研究與設(shè)計。首先,本文從脈沖式井下震源系統(tǒng)的構(gòu)成入手,確定震源控制系統(tǒng)的控制對象�？刂茖ο笾饕擅}沖式直線加速激發(fā)器、震波發(fā)生器和安全保護(hù)裝置等組成,本文對控制對象的功能及工作要求進(jìn)行了詳細(xì)介紹。根據(jù)實際工程對震源系統(tǒng)的性能要求,本文對直線電動機的機械特性與變壓變頻控制理論進(jìn)行了較系統(tǒng)的研究,并對震波發(fā)生器的功能及控制信號的處理進(jìn)行了深入分析,基于推靠裝置工作過程中推靠電動機的工作特性確定了推靠裝置的控制方案。該控制系統(tǒng)采用模塊化的設(shè)計方法,從局部到整體逐步地完成對整個震源系統(tǒng)的控制。其次,本文完成了脈沖式井下震源專用變頻器、震波發(fā)生器控制器、安全保護(hù)控制器的硬件電路設(shè)計,對相關(guān)控制電路的功能進(jìn)行了分析。詳細(xì)說明了SPWM波的DSP軟件實現(xiàn),對震波發(fā)生器控制器的軟件設(shè)計思路與實現(xiàn)方法進(jìn)行了詳細(xì)介紹。最后,本文對整個脈沖式井下震源控制系統(tǒng)軟件、硬件的性能進(jìn)行了測試和分析,試驗結(jié)果滿足設(shè)計要求,表明本文設(shè)計的脈沖式井下震源控制系統(tǒng)是成功的,完全能夠滿足實際工程的需要。
[Abstract]:Well-hole seismic technology is a new geophysical exploration technique, which can obtain very high resolution seismic signals, so fine imaging of small scale geological targets such as cross-well structure and reservoir can be obtained, which provides a new fine exploration tool for oil and gas production. The development of borehole seismic technology depends on the development of seismic source to a great extent. The pulse downhole seismic source mentioned in this paper is a new type of heavy hammer source, and the cylindrical linear motor is used as the excitation source of seismic wave. Compared with the traditional downhole heavy hammer seismic source, it has the advantages of simple structure, high controllability and greater working depth. In this paper, the control system of the pulse downhole seismic source is studied and designed. Firstly, the control object of the source control system is determined from the structure of the pulse downhole seismic source system. The control object is mainly composed of pulse linear accelerator, shock wave generator and safety protection device. In this paper, the functions and working requirements of the control object are introduced in detail. According to the requirements of the actual engineering for the seismic source system, the mechanical characteristics of the linear motor and the theory of variable-voltage frequency conversion control are systematically studied in this paper, and the function of the shock wave generator and the processing of the control signal are deeply analyzed. Based on the working characteristics of the pushing motor, the control scheme of the pushing device is determined. The control system uses modular design method to control the whole focal system step by step from part to whole. Secondly, the hardware circuit design of pulse downhole special frequency converter, shock generator controller and safety protection controller is completed, and the function of related control circuit is analyzed. The DSP software realization of SPWM wave is described in detail, and the software design idea and implementation method of the controller of shock wave generator are introduced in detail. Finally, the performance of the whole pulse downhole source control system software and hardware is tested and analyzed in this paper. The test results meet the design requirements, which shows that the pulse downhole seismic source control system designed in this paper is successful. It can fully meet the needs of the actual project.
【學(xué)位授予單位】：西京學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P631.815;TP273

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相關(guān)期刊論文 前1條

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本文編號：2299599