本文選題：地層傾角測井 + 微弱信號檢測��； 參考：《西安石油大學》2015年碩士論文

【摘要】：為了能夠滿足我國油田對地層傾角儀器的需求,本論文開展的六臂地層傾角儀器研究,可以準確地檢測出流經(jīng)地層的微弱信號,并結(jié)合井徑、測斜等其它輔助信號繪制出六條富含地層電阻率信息的曲線,進而以地層傾角矢量圖的方式來顯示地層傾角和傾斜方位角,為地質(zhì)學家確定沉積構(gòu)造及認識大規(guī)模構(gòu)造現(xiàn)象提供測井資料,從而確保油田的穩(wěn)產(chǎn)及持續(xù)地發(fā)展。本文以地層傾角測井理論為基礎,分析了地層傾角測量的基本原理,構(gòu)建了地層傾角檢測的基本模型,并對地層傾角、傾斜方位角、井斜校正及高程差進行了分析與計算。在理論研究的基礎上,研制了地層傾角儀器的硬件電路,包括極板內(nèi)置低噪聲放大電路、信號源電路和數(shù)據(jù)采集電路。其中數(shù)據(jù)采集電路以APA300和TMS320F2812為核心,并采用TMS320F2812實現(xiàn)數(shù)字相敏檢波,最終實現(xiàn)了對微弱信號的有效采集。在理論研究和井下硬件電路研制的基礎上,研制出極板檢測系統(tǒng)用于檢測極板內(nèi)置電路,設計了井徑刻度方法用于對儀器的井徑刻度。對地層傾角儀器進行了高溫高壓試驗、內(nèi)室模擬試驗及井徑刻度實驗,根據(jù)調(diào)試和實驗的結(jié)果,證實了本系統(tǒng)具有穩(wěn)定性好、檢測精度高、受外界環(huán)境限制小等特點。研制的儀器多次應用于青海油田的實際測井作業(yè),測試結(jié)果與國外同類儀器比較接近。
[Abstract]:In order to meet the demand of formation dip instrument in oil field of our country, the research of six-arm dipping instrument developed in this paper can accurately detect the weak signal flowing through the formation and combine with the well diameter. Other auxiliary signals, such as diagonometry, draw six curves rich in formation resistivity information, and then display the dip angle and tilt azimuth by means of the vector map of formation dip angle. This paper provides logging data for geologists to determine sedimentary structures and recognize large-scale structural phenomena, thus ensuring the stable production and sustainable development of oil fields. Based on the theory of formation dip logging, this paper analyzes the basic principle of formation dip measurement, constructs the basic model of formation dip angle detection, and analyzes and calculates the formation dip angle, tilt azimuth, well deviation correction and elevation difference. Based on the theoretical research, the hardware circuit of the formation dip angle instrument is developed, including the low noise amplifier circuit, the signal source circuit and the data acquisition circuit. The data acquisition circuit uses APA300 and TMS320F2812 as the core, and uses TMS320F2812 to realize the digital phase sensitive detection, and finally realizes the effective acquisition of the weak signal. On the basis of theoretical research and downhole hardware circuit development, a pole plate detection system is developed to detect the inner circuit of the plate, and a well diameter calibration method is designed to calibrate the well diameter of the instrument. The high temperature and high pressure test, the chamber simulation test and the well diameter calibration experiment are carried out. According to the results of debugging and experiment, it is proved that the system has the characteristics of good stability, high detection precision and little restriction by external environment. The developed instrument has been used in practical logging operations in Qinghai Oilfield for many times, and the test results are close to those of the same kind of instruments abroad.
【學位授予單位】：西安石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P631.83

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