Volume 45 Issue 1
Jan.  2023
Turn off MathJax
Article Contents
Xiong Z T,Tang X G,Zhang L Q,Li D D,Yu J H. 2023. Anomaly edge enhancement and topographic correction technology of linear source 3D borehole-to-surface electrical method. Acta Seismologica Sinica,45(1):46−61 doi: 10.11939/jass.20220074
Citation: Xiong Z T,Tang X G,Zhang L Q,Li D D,Yu J H. 2023. Anomaly edge enhancement and topographic correction technology of linear source 3D borehole-to-surface electrical method. Acta Seismologica Sinica45(1):46−61 doi: 10.11939/jass.20220074

Anomaly edge enhancement and topographic correction technology of linear source 3D borehole-to-surface electrical method

doi: 10.11939/jass.20220074
  • Received Date: 2022-05-19
  • Rev Recd Date: 2022-08-05
  • Available Online: 2022-11-07
  • Publish Date: 2023-01-17
  • Based on the finite element method of unstructured grid, the efficient forward modeling of the borehole-to-surface electrical method derived by the linear current source under the condition of the 3D complex geoelectric model was carried out. The effects on the effectiveness and accuracy of the borehole-to-surface electrical method imaging were discussed by obtaining the electric field response derivative to characterize the boundary range of the target body, and using the difference field topography correction technology to eliminate the topographic influence. And the comparison between the numerical solution and the analytical solution verifies the effectiveness of the algorithm in this paper. The model calculation results show that the spatial position and direction of the roadway with water accumulation cause significant changes in the apparent resistivity, and the extreme value of the apparent resistivity change rate accurately and clearly indicates the boundary position of the roadway. The normalized total horizontal derivative of the electric potential greatly improves the ability of the borehole-to-surface electrical method to identify the complex boundary position of the target body. Moreover, the influence of topography on the distribution of borehole-to-surface electrical field is also serious, and its apparent resistivity response is approximately symmetrical to the shape of the topography. The difference field technique can effectively weaken the influence of topography on the high-precision imaging of the borehole-to-surface electrical method. The research results have important theoretical and practical significance for improving the data interpretation level and application effect of the borehole-to-surface electrical method.

     

  • loading
  • [1]
    Dai Q W,Chen D P,Chen Y X,Hou Z C. 2013. The enhanced algorithms and its implementation for the abnormal response characteristics in electrical exploration[J]. Coal Geology &Exploration,41(3):75–78 (in Chinese).
    [2]
    Li C W,Ruan B Y,Lü Y Z,Duan C S,Yang T W,Wang J L. 2010. Three-dimensional FEM modeling of point source borehole-ground electrical potential measurements[J]. Chinese Journal of Geophysics,53(3):729–736 (in Chinese).
    [3]
    Tan H Q,Shen J S,Zhou C,Dong H,Fang X Y,Zhang F L. 2004. Borehole-to-surface electrical imaging technique and its application to residual oil distribution analysis of the eighth section in Gudong Oilfield[J]. Journal of the University of Petroleum,China (Edition of Natural Science),28(2):31–37 (in Chinese).
    [4]
    Tang J T,Zhang J F,Feng B,Lin J Y,Liu C S. 2007. Determination of borders for resistive oil and gas reservoirs by deviation rate using the hole-to-surface resistivity method[J]. Chinese Journal of Geophysics,50(3):926–931 (in Chinese).
    [5]
    Wang Z,Pan H P. 2014. Research on the enhanced algorithms of the abnormal response characteristics for 3D borehole-to-surface resistivity method[J]. Geophysical Prospecting for Petroleum,53(4):491–500 (in Chinese).
    [6]
    Wang Z,Wu A P,Li G. 2018. Forward modeling of borehole-ground induced polarization method under undulating topography[J]. Geophysical Prospecting for Petroleum,57(6):927–935 (in Chinese).
    [7]
    Xue G Q,Yan S,Chen W Y. 2016. A fast topographic correction method for electromagnetic data[J]. Chinese Journal of Geophysics,59(12):4408–4413 (in Chinese).
    [8]
    Yang Q R,Tan M J,Li G S,Zhang F L,Bai Z. 2020. Numerical simulation and joint inversion of three-dimensional borehole-to-surface resistivity of high deviated or horizontal wells[J]. Chinese Journal of Geophysics,63(12):4540–4552 (in Chinese).
    [9]
    Zhang T L,Zhang B L. 1995. Research on removing noises in DC resistivity trielectrode gradient measurement[J]. Oil Geophysical Prospecting,30(1):100–110 (in Chinese).
    [10]
    Kong F N,Johnstad S E,Røsten T,Westerdahl H. 2008. A 2.5D finite-element-modeling difference method for marine CSEM modeling in stratified anisotropic media[J]. Geophysics,73(1):F9–F19. doi: 10.1190/1.2819691
    [11]
    Ku C C,Hsieh M S,Lim S H. 1973. The topographic effect in electromagnetic fields[J]. Can J Earth Sci,10(5):645–656. doi: 10.1139/e73-065
    [12]
    Li L L,Han L G,Huang D N. 2014. Normalized edge detection,and the horizontal extent and depth of geophysical anomalies[J]. Appl Geophys,11(2):149–157. doi: 10.1007/s11770-014-0436-2
    [13]
    Spitzer K. 1995. A 3-D finite-difference algorithm for DC resistivity modelling using conjugate gradient methods[J]. Geophys J Int,123(3):903–914. doi: 10.1111/j.1365-246X.1995.tb06897.x
    [14]
    Xiong Z T,Tang X G,Li D D,Zhang L Q. 2019. Linear source CSAMT response simulation in the 2D anisotropic formation with topography[J]. J Appl Geophys,171:103861. doi: 10.1016/j.jappgeo.2019.103861
    [15]
    Xiong Z T,Tang X G,Qiu W Z,Zhao C Y,Zhang L Q. 2020. New algorithm for three-dimensional borehole-to-surface apparent resistivity imaging based on unstructured mesh finite-element method[J]. IEEE Access,8:184–194. doi: 10.1109/ACCESS.2019.2961806
    [16]
    Yang Q R,Tan M J,Zhang F L,Bai Z. 2021. Wireline logs constraint borehole-to-surface resistivity inversion method and water injection monitoring analysis[J]. Pure Appl Geophys,178(3):939–957. doi: 10.1007/s00024-021-02674-6
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索

    Figures(17)  / Tables(1)

    Article Metrics

    Article views (228) PDF downloads(68) Cited by()
    Proportional views
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return