三分量感应测井测量控制电路的研究与实现
发布时间：2018-09-06 20:24
【摘要】：感应测井是一种先进的测井技术,它可以在井眼不导电的情况测量地层电阻率。感应测井能够有效的识别低阻层,能够有效辨别过渡带和低阻层。感应测井仪的设计需要抑制无用的一次场信号,提高有用的二次感应场信号达到测量地层电导率的目的。三分量感应相对于常规感应测井的优势在于测得水平电阻率的同时还能测得地层垂直电阻率、地层倾角以及倾斜方位角。我国三分量测井技术比较国外落后,国内多家单位也在积极自主研发三分量感应测井仪器,发展具有自主知识产权的三分量感应测井设备已成为石油勘探事业中非常重要的方向。三分量测井仪器工作在高温、高压的恶劣环境,这样高可靠性的要求无疑对设计提出了挑战。本课题侧重于三分量感应测井仪的研制,从测井仪器的整体框架出发,本文将介绍三分量感应仪中关键的测量控制电路的实现。测控电路需要在复杂电磁高温环境下定量测量多通道线圈信号。测控电路主要功能包括:接收信号差分转化、接收信号模数转换、信号相敏检波运算、温漂对消运算、仪器温度与电压监测、仪器时序控制以及仪器与地面系统通信实现。从仪器原理、整体结构出发,明确了测量控制电路的功能、指标,研制并调试了以TMS320F2812DSP芯片与A3P250的FPGA芯片为核心器件的硬件实物,开发了相关DSP和FPGA程序代码。通过系统联调和仪器的高温测试,仪器达到了设计指标要求。本文所阐述的研发过程以及测试结果都为仪器后续定型生产奠定了坚实的基础。
[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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P631.811
本文编号：2227440
[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.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P631.811
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