ANALYSIS OF THE VERTICAL-VERTICAL CONTROLLED SOURCE ELECTROMAGNETIC METHOD APPLIED TO RESERVOIR MONITORING
DOI:
https://doi.org/10.56238/arev7n12-009Keywords:
Electromagnetic Modelling, Reservoir Monitoring, Transient Electromagnetic MethodAbstract
Geophysical prospecting in the marine environment has reduced the uncertainties and ambiguities encountered in oil and gas prospecting, mainly due to technological and operational advances. In addition to presenting an increasingly shorter acquisition time and higher resolution, they provide a more significant amount of information and knowledge about the geological environment of interest. In acquiring data in different geological environments, the ideal would be to use different geophysical methodologies to obtain the most considerable amount of information contained in the data and provide full knowledge about the sedimentary environment under study. Thus, controlled-source electromagnetic methods, which measure the decay of fields (electric and magnetic) or map electrical resistivity contrasts, minimise the uncertainties and ambiguities encountered by conventional seismic methods. The vertical-vertical controlled-source electromagnetic method (VVCSEM) is a controlled-source electromagnetic technique differentiated from seabed logging by the Tx-Rx vertical configurations and acquisition mode and time domain rather than the frequency domain. Its primary use is hydrocarbon reservoir monitoring. The present manuscript presents the results of the geological modelling performed at Marlim Field, Campos Basin - Brazil and the data analysis from the VVCSEM three-dimensional electromagnetic multiphysics modelling applied to the Marlim model. Despite the geological complexity of the Marlim Field, the VVCSEM was able to distinguish the thin hydrocarbon reservoir even in the face of large saline and highly resistive structures at the shortest offsets.
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