【摘要】：感應(yīng)測井是一種先進(jìn)的測井技術(shù),它可以在井眼不導(dǎo)電的情況測量地層電阻率。感應(yīng)測井能夠有效的識別低阻層,能夠有效辨別過渡帶和低阻層。感應(yīng)測井儀的設(shè)計需要抑制無用的一次場信號,提高有用的二次感應(yīng)場信號達(dá)到測量地層電導(dǎo)率的目的。三分量感應(yīng)相對于常規(guī)感應(yīng)測井的優(yōu)勢在于測得水平電阻率的同時還能測得地層垂直電阻率、地層傾角以及傾斜方位角。我國三分量測井技術(shù)比較國外落后,國內(nèi)多家單位也在積極自主研發(fā)三分量感應(yīng)測井儀器,發(fā)展具有自主知識產(chǎn)權(quán)的三分量感應(yīng)測井設(shè)備已成為石油勘探事業(yè)中非常重要的方向。三分量測井儀器工作在高溫、高壓的惡劣環(huán)境,這樣高可靠性的要求無疑對設(shè)計提出了挑戰(zhàn)。本課題側(cè)重于三分量感應(yīng)測井儀的研制,從測井儀器的整體框架出發(fā),本文將介紹三分量感應(yīng)儀中關(guān)鍵的測量控制電路的實現(xiàn)。測控電路需要在復(fù)雜電磁高溫環(huán)境下定量測量多通道線圈信號。測控電路主要功能包括:接收信號差分轉(zhuǎn)化、接收信號模數(shù)轉(zhuǎn)換、信號相敏檢波運算、溫漂對消運算、儀器溫度與電壓監(jiān)測、儀器時序控制以及儀器與地面系統(tǒng)通信實現(xiàn)。從儀器原理、整體結(jié)構(gòu)出發(fā),明確了測量控制電路的功能、指標(biāo),研制并調(diào)試了以TMS320F2812DSP芯片與A3P250的FPGA芯片為核心器件的硬件實物,開發(fā)了相關(guān)DSP和FPGA程序代碼。通過系統(tǒng)聯(lián)調(diào)和儀器的高溫測試,儀器達(dá)到了設(shè)計指標(biāo)要求。本文所闡述的研發(fā)過程以及測試結(jié)果都為儀器后續(xù)定型生產(chǎn)奠定了堅實的基礎(chǔ)。
[Abstract]:Induction logging is an advanced logging technique, which can measure formation resistivity without conducting well. Induction logging can effectively identify low resistivity layers and identify transition zones and low resistivity layers. The design of induction logging tool needs to suppress the useless primary field signal and improve the useful secondary induction field signal to measure the formation conductivity. The advantage of three-component induction over conventional induction logging is that the horizontal resistivity can be measured at the same time the vertical resistivity the dip angle and the inclined azimuth angle can be obtained. China's three-component logging technology is lagging behind that of foreign countries, and many domestic units are actively developing three-component induction logging tools on their own. The development of three-component induction logging equipment with independent intellectual property rights has become a very important direction in petroleum exploration. The three component logging tool works in the harsh environment of high temperature and high pressure, so the requirement of high reliability undoubtedly poses a challenge to the design. This paper focuses on the development of the three-component induction logging tool. From the overall framework of the logging tool, this paper will introduce the realization of the key measurement control circuit in the three-component induction tool. The measurement and control circuit needs to measure the multichannel coil signal quantitatively in the complex electromagnetic high temperature environment. The main functions of the measurement and control circuit include: receiving signal differential conversion, receiving signal A / D conversion, signal phase sensitive detection operation, temperature drift cancellation operation, instrument temperature and voltage monitoring, instrument timing control and communication between instrument and ground system. Based on the principle of the instrument and the whole structure, the function and index of the measuring control circuit are defined. The hardware object of the FPGA chip based on TMS320F2812DSP chip and A3P250 chip is designed and debugged, and the relevant DSP and FPGA program codes are developed. Through the high temperature test of the system and harmonic instrument, the instrument meets the design requirements. The research and development process and test results in this paper have laid a solid foundation for the follow-up production of the instrument.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：P631.811

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本文編號：2227440