Method for removing air wave effect from offshore frequency domain controlled-source electromagnetic data

摘要

A method for removing the air wave effect from offshore frequency domain controlled source electromagnetic survey data. The region of interest is modeled with ( 111 ) and without ( 113 ) a top air layer. The electromagnetic field due to the source is computed at the survey receiver positions for each source position for both models. The difference between the fields computed ( 116 ) from the two models is the air wave effect, which is then subtracted ( 117 ) from the field data for the corresponding source-receiver geometry.