【摘要】：微柱形聚焦電阻率測井儀是一種測量侵入帶電阻率的儀器。其主要作用是進行淺探測,它的測量準(zhǔn)確度更高,估算地層能力更強,適合探測滲透性地層。本文在對比傳統(tǒng)的電法測井方式的基本原理以及優(yōu)缺點的基礎(chǔ)上,結(jié)合國內(nèi)外技術(shù)背景,介紹了微柱形聚焦測井方式的歷史發(fā)展與國內(nèi)外研究現(xiàn)狀,說明了該項目研究的必要性,對其技術(shù)上存在的難題進行了詳細說明和分析。目前國內(nèi)的微柱形聚焦電阻率測井方式的研究還處于相對落后的階段,沒有在實際應(yīng)用中普及,與國外先進的聚焦電阻率測量儀器相比還存在較大差距。因此,打破目前國內(nèi)沒有相關(guān)可靠技術(shù),自主研制具備國際競爭力的微柱形聚焦電阻率測量儀器是一項非常重要的任務(wù)。本文完成了微柱形聚焦電阻率測井電路系統(tǒng)的設(shè)計與實驗工作;設(shè)計了針對我國地層情況的微柱形聚焦電阻率測量電路的模擬系統(tǒng)的總體功能構(gòu)架與解決方案;考慮到井下探頭內(nèi)部空間有限、供電有限、需要多路測量參數(shù),以及實際地層阻抗不穩(wěn)定等問題,專門設(shè)計了適應(yīng)井下環(huán)境的長條形布局的低功耗電路板和基于單片機MSP430的5路測量電路,實現(xiàn)了系統(tǒng)的穩(wěn)定工作和電阻率參數(shù)的有效測量;設(shè)計了聚焦電阻率模塊電路完成聚焦功能以及保證了電信號穿過需要測量的地層和測量數(shù)據(jù)的正確性;在水中和模擬井中進行了電信號發(fā)射系統(tǒng)和測量系統(tǒng)的相關(guān)現(xiàn)場實驗,實驗結(jié)果表示該電路性能穩(wěn)定可靠,可以實現(xiàn)要求的功能,并且滿足了預(yù)期的技術(shù)指標(biāo)要求,為將來在實際應(yīng)用中普及打下了良好的基礎(chǔ)。
[Abstract]:Microcylindrical focusing resistivity logging tool is a tool for measuring the resistivity of intrusive zone. Its main function is to conduct shallow detection, it has higher measuring accuracy and stronger ability of estimating stratum, so it is suitable for detecting permeable strata. On the basis of comparing the basic principles, advantages and disadvantages of the traditional electric logging methods, and combining with the technical background at home and abroad, this paper introduces the historical development and the present research situation of the microcylindrical focusing logging methods at home and abroad. The necessity of this project is explained, and the technical problems are explained and analyzed in detail. At present, the research of microcylindrical focused resistivity logging is still relatively backward, which is not popularized in practical application. Compared with the advanced focused resistivity measurement instruments abroad, there is still a big gap. Therefore, it is a very important task to develop an internationally competitive micro-column focusing resistivity measuring instrument. In this paper, the design and experimental work of the microcylindrical focusing resistivity logging circuit system is completed, and the overall functional framework and solution of the microcylindrical focusing resistivity measurement circuit simulation system for the formation situation in China are designed. Considering the limited internal space of the underground probe, the limited power supply, the need for multiple measurement parameters, and the instability of the actual formation impedance, The low power circuit board and the five-way measuring circuit based on single-chip computer MSP430 are specially designed to adapt to the long strip layout in the downhole environment. The stable operation of the system and the effective measurement of the resistivity parameters are realized. The focusing resistivity module circuit is designed to complete the focusing function and to ensure the accuracy of the electrical signal passing through the stratum and the measured data. The field experiments of the electric signal transmitting system and the measuring system are carried out in water and in the simulation well. The experimental results show that the circuit is stable and reliable, can achieve the required function, and meets the expected technical requirements. It will lay a good foundation for popularizing in practical application in the future.
【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】：2017
【分類號】：P631.83

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本文編號：2323100