基于CAN总线的随钻测井系统设计与实现

发布时间：2018-09-18 19:52

【摘要】：随钻测井是一种新兴的正处于不断发展中的测井技术,而CAN总线通信技术在工业现场的应用也日益广泛。目前,随钻测井技术在新型油、气钻井工程中的应用具有广泛的推广价值。使用CAN总线构建随钻测井系统,对于助推我国随钻测井技术,油、气钻井产业的发展与进步,具有广阔的市场需求和应用前景。本项目主要研究随钻测井技术,首次将随钻测井技术和CAN总线通信技术引入智能钻井、测井系统,并分析它和普通钻井、测井技术及其通信方式的对比优势,本文重点研究随钻测井系统,以使其适合在随钻测量条件下使用,解决了远距离数据传输的准确性和测量近钻头性等技术问题。此项目研究了随钻测量中特征参数的自动检测方案,基于随钻测井原理,设计随钻测井的系统方案及其CAN总线通信方案,实现近钻头的数据采集和远距离的实时通信[1],旨在提高系统的数据传输速率、可靠性和降低生产制造成本等。本课题来源于四川省科技厅,通过选用AT90CAN32单片机为核心控制器,设计了一个多路数据采集处理系统。通过某些芯片自身集成的温度传感器对井内温度进行采集,经由三轴加速度传感器和三轴磁阻传感器对近钻头位置及状态进行重力和磁场上的确定,利用闪烁计数器对γ射线强度进行计数,采取感应测井对井内电导率进行记录。最后将测得的各种参数进行报文封装,并通过CAN总线发送到地面上位机,再由地面上位机根据各个参数以及钻井深度等予以综合判断,正确指导钻进。本文分别对系统的通信功能和通信可靠性进行了测试,对通信功能的测试包括发送数据测试与接收数据测试。测试结果表明,系统能成功地进行标准数据帧的发送与接收。从报文时间间隔测试、通信距离测试和通信速率测试三个方面对通信可靠性进行了测试;由实验结果可知,对于满足实际需求,系统的通信是可靠的。除此之外,还对系统传感器模块的功能进行了测试,系统基本能够达到预期的设计目标,对实际钻井工程有实际且重要的指导意义。
[Abstract]:Logging while drilling is a new and developing logging technology, and CAN bus communication technology is widely used in industrial field. At present, the application of logging while drilling technology in new oil and gas drilling engineering has extensive popularization value. The use of CAN bus to construct the logging system while drilling has broad market demand and application prospect for promoting the development and progress of drilling while drilling technology, oil and gas drilling industry in China. This project mainly studies logging while drilling technology, introduces the technology of logging while drilling and CAN bus communication technology into intelligent drilling and logging system for the first time, and analyzes its comparative advantages with conventional drilling, logging technology and its communication mode. This paper focuses on the research of the logging system while drilling in order to make it suitable for use in the condition of measurement while drilling and solve the technical problems such as the accuracy of long-distance data transmission and the measurement of near-drill bit. Based on the principle of logging while drilling, the system scheme of logging while drilling and the communication scheme of CAN bus are designed. In order to improve the data transmission rate, reliability and reduce the manufacturing cost of the system, the data acquisition and remote real-time communication of the near bit are realized. This subject comes from the science and technology department of Sichuan province. By selecting AT90CAN32 single chip computer as the core controller, a multi-channel data acquisition and processing system is designed. The temperature in the well is collected by the temperature sensor integrated by some chips, and the position and state of the bit are determined by the three-axis acceleration sensor and the three-axis magnetoresistive sensor. The intensity of 纬-ray was counted by scintillation counter and the electrical conductivity was recorded by induction logging. Finally, the measured parameters are encapsulated and sent to the ground host computer by CAN bus. Then the surface host computer synthetically judges the parameters and drilling depth to guide drilling correctly. In this paper, the communication function and communication reliability of the system are tested respectively. The test of communication function includes sending data test and receiving data testing. The test results show that the system can transmit and receive standard data frames successfully. The reliability of the communication is tested from three aspects: the time interval test, the communication distance test and the communication rate test. The experimental results show that the communication of the system is reliable to meet the actual requirements. In addition, the function of the sensor module of the system is tested, and the system can basically achieve the expected design goal, which has practical and important guiding significance to the actual drilling engineering.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.81;TP273

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