无电缆测井深度测量系统研究
发布时间：2018-10-25 20:12
【摘要】：随着石油勘探开发的不断深入,水平井、大斜度井等复杂井不断增多,测井难度也不断增大。无电缆测井技术因具有快速、可靠、安全的特点,在复杂井测井领域,能弥补常规测井技术的不足。深度测量系统作为无电缆测井系统的重要组成部分,其获取的深度信息是测井资料的一项重要参数,对准确获取油气的储层信息具有重要的实用意义。本文分析了无电缆测井深度测量系统的应用现状,得出了深度测量系统的设计需求。提出了采用单片机+CPLD进行数据采集并通过以太网传输的总体方案。本文的主要研究内容如下:①针对绞车编码器输出的信号,设计了整形防抖预处理电路,防止误计数;针对压力传感器信号进行了I/V转换、低通滤波、AD转换的处理,便于单片机高精度采集。②采用CPLD实现了正交编码信号的鉴相和计数功能,简化了硬件电路,并可通过修改软件的方式对硬件重构,提高了系统的灵活性。计数结果通过UART传输给单片机。③采用单片机实现了深度和压力数据的运算处理,获取了井下仪器的深度和钩载,结合大钩的重载或轻载状态提取了有效的深度数据,并通过分段校验的方式减小了深度误差。④采用C8051F340和CP2200实现了以太网接口,通过移植TCP/IP协议和设计以太网的驱动,完成了深度测量系统的网络通讯,实现了数据的实时、可靠和快速传输。⑤在实验室搭建了测试平台进行正交编码计数和张力采集验证,正交编码计数准确,张力采集的线性度和精度分别为0.77%和0.0021k N。在实验室的条件下模拟了实际的测井过程,试验结果表明深度和压力数据能正常采集、上传并正确显示,获取的深度----时间曲线满足无电缆测井要求,具有一定的准确性。
[Abstract]:With the deepening of petroleum exploration and development, the number of complex wells, such as horizontal wells and large deviated wells, is increasing, and the logging difficulty is also increasing. Because of its fast, reliable and safe characteristics, cable-free logging technology can make up for the deficiency of conventional logging technology in complex well logging field. Depth measurement system is an important part of cable-less logging system. The depth information obtained by depth measurement system is an important parameter of logging data. It is of great practical significance to accurately obtain reservoir information of oil and gas. In this paper, the application status of cable-less logging depth measurement system is analyzed, and the design requirements of the depth measurement system are obtained. The overall scheme of data acquisition and transmission via Ethernet using single chip computer CPLD is put forward. The main contents of this paper are as follows: 1 according to the output signal of winch encoder, a shaping and anti-shake preprocessing circuit is designed to prevent miscount; I / V conversion, low pass filter and AD conversion are used to process the pressure sensor signal, which is convenient for high precision acquisition of single chip computer. 2 the phase detection and counting function of orthogonal coded signal is realized by CPLD, and the hardware circuit is simplified. The flexibility of the system can be improved by modifying the software. The counting results are transmitted to the single chip microcomputer by UART. 3 the depth and hook load of the underground instruments are obtained by using the single chip microcomputer, and the effective depth data are extracted in combination with the heavy or light load state of the large hook. The depth error is reduced by the method of segmented verification. 4 Ethernet interface is realized by using C8051F340 and CP2200. By transplanting TCP/IP protocol and designing the driver of Ethernet, the network communication of the depth measurement system is completed, and the real-time data is realized. 5. The orthogonal coding counting and tension sampling are carried out on the test platform in the laboratory. The orthogonal coding count is accurate, and the linearity and precision of the tension collection are 0.77% and 0.0021 KN, respectively. The actual logging process is simulated in laboratory. The experimental results show that the depth and pressure data can be collected, uploaded and displayed correctly, and the obtained depth-time curves meet the requirements of cable-less logging. Have certain accuracy.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.81
本文编号：2294719
[Abstract]:With the deepening of petroleum exploration and development, the number of complex wells, such as horizontal wells and large deviated wells, is increasing, and the logging difficulty is also increasing. Because of its fast, reliable and safe characteristics, cable-free logging technology can make up for the deficiency of conventional logging technology in complex well logging field. Depth measurement system is an important part of cable-less logging system. The depth information obtained by depth measurement system is an important parameter of logging data. It is of great practical significance to accurately obtain reservoir information of oil and gas. In this paper, the application status of cable-less logging depth measurement system is analyzed, and the design requirements of the depth measurement system are obtained. The overall scheme of data acquisition and transmission via Ethernet using single chip computer CPLD is put forward. The main contents of this paper are as follows: 1 according to the output signal of winch encoder, a shaping and anti-shake preprocessing circuit is designed to prevent miscount; I / V conversion, low pass filter and AD conversion are used to process the pressure sensor signal, which is convenient for high precision acquisition of single chip computer. 2 the phase detection and counting function of orthogonal coded signal is realized by CPLD, and the hardware circuit is simplified. The flexibility of the system can be improved by modifying the software. The counting results are transmitted to the single chip microcomputer by UART. 3 the depth and hook load of the underground instruments are obtained by using the single chip microcomputer, and the effective depth data are extracted in combination with the heavy or light load state of the large hook. The depth error is reduced by the method of segmented verification. 4 Ethernet interface is realized by using C8051F340 and CP2200. By transplanting TCP/IP protocol and designing the driver of Ethernet, the network communication of the depth measurement system is completed, and the real-time data is realized. 5. The orthogonal coding counting and tension sampling are carried out on the test platform in the laboratory. The orthogonal coding count is accurate, and the linearity and precision of the tension collection are 0.77% and 0.0021 KN, respectively. The actual logging process is simulated in laboratory. The experimental results show that the depth and pressure data can be collected, uploaded and displayed correctly, and the obtained depth-time curves meet the requirements of cable-less logging. Have certain accuracy.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.81
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