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| | Abstract | | In recent years, there has been a growing interest in offshore exploration methods that use controlled electromagnetic, EM, and/or electric sources. One such method for offshore exploration is the seafloor/marine direct-current, DC, method. In this study, we have focused on the numerical modeling of 1D seafloor DC electric potential. Seafloor DC survey is the method of choice for surveying shallow subbottom targets such as fault structures, ground water conditions, and seafloor hydrothermal deposits in coastal and deep-water areas. It is important to calculate the 1D response of arbitrary electrode configurations in order to evaluate the predicted marine and seafloor DC responses. Moreover, it is also important to develop effective survey and equipment designs and incorporate them with 2D/3D forward modeling. We have developed a new modeling code for marine and seafloor DC exploration using the arbitrary electrodes configuration based on Sato,2000, and the linear filtering method. This code has been tested using synthetic examples such as borehole resistivity logging benchmark model and seafloor Schlumberger and dipole-dipole configurations. From the results of the study, we conclude that the code is able to compute the 1D response with high accuracy, therefore, it can be used in 1D marine and seafloor DC electric potential calculations. |
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