地层倾角仪器的研究与设计

发布时间：2018-06-17 06:41

本文选题：地层倾角测井 + 微弱信号检测　；参考：《西安石油大学》2015年硕士论文

【摘要】：为了能够满足我国油田对地层倾角仪器的需求,本论文开展的六臂地层倾角仪器研究,可以准确地检测出流经地层的微弱信号,并结合井径、测斜等其它辅助信号绘制出六条富含地层电阻率信息的曲线,进而以地层倾角矢量图的方式来显示地层倾角和倾斜方位角,为地质学家确定沉积构造及认识大规模构造现象提供测井资料,从而确保油田的稳产及持续地发展。本文以地层倾角测井理论为基础,分析了地层倾角测量的基本原理,构建了地层倾角检测的基本模型,并对地层倾角、倾斜方位角、井斜校正及高程差进行了分析与计算。在理论研究的基础上,研制了地层倾角仪器的硬件电路,包括极板内置低噪声放大电路、信号源电路和数据采集电路。其中数据采集电路以APA300和TMS320F2812为核心,并采用TMS320F2812实现数字相敏检波,最终实现了对微弱信号的有效采集。在理论研究和井下硬件电路研制的基础上,研制出极板检测系统用于检测极板内置电路,设计了井径刻度方法用于对仪器的井径刻度。对地层倾角仪器进行了高温高压试验、内室模拟试验及井径刻度实验,根据调试和实验的结果,证实了本系统具有稳定性好、检测精度高、受外界环境限制小等特点。研制的仪器多次应用于青海油田的实际测井作业,测试结果与国外同类仪器比较接近。
[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.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.83

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