EK BIEGERT 1 M. TALWANI 2 and DJ SMIT 3 1 Shell International Exploration and
Production Inc. 3737 Bellaire Boulevard Houston TX 77025 USA 2 Rice University 3 Shell
UK Exploration and Production Subsurface de-risking is presently almost exclusively done
by methods using seismic data. Indeed all other data collected at the surface is referred to
as' non-seismic'data expressing this fact. However there are emerging gravity measurement …