Filling the Gap - Integrating Nodes and Streamer Data for Geophysical Monitoring Purposes

In the recent past, various tests and related publications have demonstrated that high quality data can be acquired with a relatively sparse distribution of seismic nodes on the ocean bottom.<br>One of the possible applications of this promising geophysical technology is to use it as a complement to streamer data, to fill in sensitive areas where conventional marine or OBC acquisitions are unfeasible or too risky from a HSE point of view.<br>In this paper, we assess the feasibility of such a joint streamer - nodes approach for the geophysical monitoring of an ultra deep water oil and gas field. <br>We develop a methodology for the planning of a joint survey, taking into account the different nature of the two sets of data, as well as other relevant operational constraints.<br>We validate both joint time and depth pre stack migration schemes, resolving the problem of the datum difference between ocean bottom and sea surface data.<br>We evaluate the impact of this merged approach on the interpretation of resulting seismic amplitudes, focussing on the time lapse characterization of turbidite fairways.<br>