A fracture study by using bipole–bipole cross-well logging |
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| Authors: | TR Guo LT Tong LW Chiang CH Yang |
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| Institution: | aGreen Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu, Taiwan;bInstitute of Civil Engineering, Ching-Yuan University, Chung Li, Taoyuan, Taiwan |
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| Abstract: | Electrical Resistivity Tomography (ERT) can provide images of subsurface electrical structure between two boreholes. Data quality control is a key issue before ERT inversion. However, there is no effective data quality control method on an ERT survey. In this paper, a method called common current gather for a bipole–bipole array (CCGbb) was proposed to check ERT data quality in a rapid way. Synthetic models were conducted to compare the response difference between pole–pole array and bipole–bipole array. A field work at granite area was tested to verify the applicability of the proposed CCGbb method. From the results of this study, we suggested that conducting CCGbb before ERT inversion and a cross-borehole tracer test for both field data quality control and possible water conducting fractures (WCFs) delineation. |
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| Keywords: | Electrical resistivity tomography Common current source gather Water conducting fracture Bipole-bipole array |
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