Resolution enhancement of 2D controlled-source electromagnetic images by use of point-spread function inversion

The marine controlled-source electromagnetic technique is employed both in large-scale geophysical applications as well within the exploration of hydrocarbons and gas hydrates. Because diffusive character EM field, only very low frequencies are used, leading to inversion results with resolution. In this paper, we calculated resolution matrix associated derived corresponding point-spread functions. PSFs provided information about how much actual was blurred. Using a space-varying deconvolution can thus further improve result. deblurring carried out using nonnegative flexible conjugate gradient least-squares (NN-FCGLS) algorithm, which fast iterative restoration technique. To attain completeness, also introduced obtained blind algorithm based on maximum likelihood estimation unknown PSFs. potential proposed approach has been demonstrated complex synthetic data field acquired at Wisting oil Barents Sea. cases, final result improved showed greater agreement known target area.