Geosoft presents on 3D Hybrid Gravity Inversion: Coverage in OilVoice
Geosoft presented on 3D Hybrid Gravity Inversion for Base of Salt Modelling at the Finding Petroleum Non-Seismic Geophysics event, held February 19 in London. Hybrid inversion is a unique approach introduced with Geosoft VALEM (Voxel Assisted Layer Enhanced Modelling).
Reporting on the event in OilVoice, David Bamford, a past head of exploration and head of geophysics at BP and Director of PetroMall, wrote: “Recently we had an excellent Finding Petroleum Forum on 'Non-Seismic Geophysics' - videos of, and slides from, the presentations can be seen online. One of my key takeaways was that, depending on the geological setting - say failed rift vs passive margin vs thrust belt - two or even three non-seismic technologies could work well when integrated with seismic, preferably 3D seismic. It's pretty clear that there is a 'right combination' that can help for each of the basin, play, prospect and producing field scales. This is new and transformational!”
How do you achieve this integration? “Geosoft have, I think, a solution to this problem,” wrote Bramford. “Basically, their idea is that a geoscientist-driven interpretation of 3D seismic provides a geological framework into which other measurements, such as density from gravity, or resistivity from an electrical technology, can be inverted, honouring the constraints devised by the interpreter. In their presentation, they demonstrate that an interpretation can be much improved by using - high resolution (FTG) - potential field data in such a conjunction with seismic data, in particular showing a Base of Salt problem where gravity data are used to assist the picking of base of salt horizons.”
According to Bamford, it’s an example where “the data has been allowed to ‘speak’ rather than having a preconceived model forced upon it.”