A New Local Method for Seismic Deghosting of Towed Streamer Data

The recent interest in broadband seismic technology has driven us into searching for new and improved deghosting methods. The ghost effects in recorded towed streamer data are caused by the reflection of data back down from the sea surface. The interference between the up-going primary wavefields and the down-going ghosts creates notches in the recorded spectrum which reduce the useful bandwidth of the spectrum especially at increasing streamer depth. The purpose of this abstract is to propose a new approximative deghosting method for towed streamer data that works well for streamer depths down to around 15m. Compare to other proposals for deghosting, our method is local, which means the recorded pressure can be deghosted using only itself and its horizontal spatial derivatives at that receiver location together with the receiver’s depth. Numerical example we are showing in this abstract indicates a promising result in deghosting data between the first and second notch frequency.