Marine Technology Reporter Blogs - 4d

During the production phase of a reservoir, natural phenomenon, such as movement of fluids, changes in pressure and stress in and around reservoirs occur. In high-pressure reservoirs, pressure depletion during production is associated with compaction within the reservoir causing stretching or extensional stresses in the overburden and underlying formation. This causes variation in velocities and formation thickness, which can be observed as 4D time shifts between successive vintages. Tracking the movements of fluids due to production, for example, gives valuable information about the depletion of a field, and can indicate areas of bypassed oil or gas.

This new technical cooperation agreement between Petrobras and CGGVeritas highlights the importance of geophysical studies to the future of O&G exploration in Brazil.CGGVeritas  has announced that it has signed a Technology Cooperation Agreement (TCA) with the Brazilian O&G player, Petrobras, for the collaborative development and implementation of new technologies in Geophysics. The TCA sets the framework for collaborative research projects between Petrobras and CGGVeritas over a three-year time period in specific areas such as 4D seismic processing, imaging and reservoir geophysics. These research projects will be conducted at a recently opened CGGVeritas Technology Center in Rio de Janeiro.