多通道井-地电位梯度采集系统的设计与实现
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
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 d B,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。
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 d B.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 experimentaldata 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.
引文
[1]高博禹,彭仕宓,王建波.剩余油形成与分布的研究现状及发展趋势[J].特种油气藏,2004,8(4):38-41.Gao Bo-yu,Peng Shi-bi,Wang Jian-bo.Research status and development trend of the remaining oil in the formation and distribution[J].Special Oil and Gas Reservoirs,2004,8(4):38-41.
    [2]Wang Tsili,Stodt John A,Stierman Donals J,et al.Mapping hydraulic fractures using a borehole-to-surface electrical resisitivity method[J].Geoexploration,1991,28(3-4):349-369.
    [3]Keisuke Ushijima.Fluid flow monitoring of EOR process by electrical prospecting[C]∥Expanded Abstracts,SEG 67th Annual Meeting,1997,Dallas:651-653.
    [4]Ho Trong Long.3-D inversion of borehole-to-surface electrical data using a back-propagation neural network[J].Journal of Applied Geophysics,2009,68(4):489-499.
    [5]Marsala A F,Al-Buali M,Ali Z,et al.First borehole to surface electromagnetic survey in KSA:Reservoir mapping and monitoring at a New Scale[C]∥SPE Paper 146348,2011.
    [6]张金成.电位法井间监测技术[J].地震地质,2001,23(2):292-300.Zhang Jin-cheng.Potential method well monitoring technology[J].Chinese Seismology and Geology,2001,23(2):292-300.
    [7]王志刚,何展翔.井-地电法三维物理模型试验[J].石油地球物理学报,2005,40(5):594-597.Wang Zhi-gang,He Zhan-xiang.Borehole-surface electrical three-dimensional physical model test[J].Oil Geophysical Journal,2005,40(5):594-597.
    [8]徐凯军,李桐林.垂直有限线源三维地电场有限差分正演研究[J].吉林大学学报:地球科学版,2006,36(1):137-141.Xu Kai-jun,Li Tong-lin.The forward modeling of three-dimensional geoelectric field of vertical finite line source by finite-difference method[J].Journal of Jilin University(Earth Science Edition),2006,36(1):137-141.
    [9]邵雷.井-地电位检测系统研究[D].长春:吉林大学仪器系,2006.Shao Lei.Research on detection system for well-earth potential[D].Changchun:Department of Instrument,Jilin University,2006.
    [10]徐世浙.地球物理中的有限单元法[M].北京:科学出版社,1994:178-193.
    [11]曲丽荣,胡容,范寿康.Labview、Matlab及其混合编程技术[M].北京:机械工业出版社,2011.
    [12]钱峰.EZ-USB FX2单片机原理、编程及应用[M].北京:北京航空航天大学出版社,2006.
    [13]高晋占.微弱信号检测[M].北京:清华大学出版社,2004.
    [14]王超,宋克柱,唐进.高性能水下地震数据采集系统设计与实现[J].吉林大学学报:工学版,2007,37(1):168-172.Wang Chao,Song Ke-zhu,Tang Jin.High performance data acquisition system for marine seismic survey[J].Journal of Jilin University(Engineering and Technology Edition),2007,37(1):168-172.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心