吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (1): 153-160.doi: 10.13229/j.cnki.jdxbgxb201501023

• 论文 • 上一篇    下一篇

多通道井-地电位梯度采集系统的设计与实现

贾正森1,2,林君1,2,朱凯光1,2,王佳1,2,李雪涛1,2   

  1. 1.吉林大学 国家地球物理探测仪器工程技术研究中心,长春 130026;
    2.吉林大学 仪器科学与电气工程学院,长春 130026
  • 收稿日期:2013-05-03 出版日期:2015-02-01 发布日期:2015-02-01
  • 通讯作者: 林君(1954),男,教授,博士生导师.研究方向:地球物理探测技术和虚拟仪器.E-mail:lin_jun@jlu.edu.cn
  • 作者简介:贾正森(1986),男,博士研究生.研究方向:井-地电法及仪器.E-mail:zhengsen.jia@hotmail.com
  • 基金资助:
    吉林省科技发展计划项目(20076002).

Design and implementation of multi-channel borehole-surface potential gradient detection system

JIA Zheng-sen1,2, LIN Jun1,2, ZHU Kai-guang1,2, WANG Jia1,2, LI Xue-tao1,2   

  1. 1.National Geophysical Exploration Instrument Engineering Technology Research Center, Jilin University,Changchun 130026, China;
    2.College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130026, China
  • Received:2013-05-03 Online:2015-02-01 Published:2015-02-01

摘要: 根据垂直有限线源三维异常电位有限差分展开理论计算,验证了电位梯度法在探测水驱驱油异常方向的有效性,设计并研制了基于虚拟仪器技术的低噪声、高分辨率油田井-地电位梯度采集系统。该系统采用差分输入方式,短路噪声幅度低于-130 dB,A/D采集使用了扩展插槽设计思想,从而达到多通道数据的同步采集。运用Matlab和Labview混合编程技术,实现了微弱信号的提取和探测结果的实时成像。对比、重复实验结果表明,电位梯度采集系统具有更高的分辨率及良好的稳定性,通过对大庆油田注水井实验数据的处理、分析,确定了水驱的方向,用注水井资料验证后,证实了该方法的有效性和系统在水驱驱油方向探测上的准确性。

关键词: 仪器仪表技术, 井-地电位梯度, 剩余油, 有限差分, Labview, 多通道

Abstract: Theoretical calculations are carried out based on a vertical line source 3D abnormal potential of finite difference to verify the effectiveness of potential gradient in the detection of water injection direction. Then, a low-noise, high-resolution oil borehole-surface potential gradient detection system is designed and developed based on virtual instrument technology. The system applies a differential input. The short circuit noise amplitude is lower than -130 dB. The A/D acquisition, which adopts the expansion slot design ideas, realizes the synchronization of multi-channel data acquisition. The upper layer software consists of Matlab and Labview programming techniques, thus the extraction of weak signals and real-time imaging of detection results can be achieved. Experiments show that the potential gradient detection system has higher resolution and good stability compared to the potential detection system. By processing and analyzing the experimental data obtained from the injection wells in Daqing oilfield, it can locate the cutting-edge of water drive. Furthermore, the injection well data prove the accuracy and effectiveness of the system in detecting the water injection direction.

Key words: technology of instrument and meter, borehole-surface potential gradient, residual oil, finite differences, Labview, multi-channel

中图分类号: 

  • TH762
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