Offshore staff
VANCOUVER, Canada — Trillion Energy International has started a 3D seismic reprocessing exercise over the SASB gas field in the Turkish sector of the Black Sea.
WesternGeco shot the existing 22 sq km of 3D data, which includes the SASB Block, and this was subsequently processed in 2004 using pre-stack time migration (PSTM).
However, SASB's geology is complex, so reprocessing with more advanced pre-stack depth migration (PSDM) and incorporating time-depth data from wells drilled since the old PSTM model was created should improve modeling.
Trillion plans to deploy the new PSDM seismic velocity model to obtain a more detailed and accurate mapping of individual gas reservoir units, providing better imaging of the gas trapping faults and better structural maps.
It should also help the company identify and define the numerous undrilled stratigraphic exploration gas prospects on the block, and mapping of the never-explored deeper Cretaceous Akveren Formation, which contains deeper anomalies, according to the old PSTM model.
Close to SASB onshore (20-30 km away), there are said to be numerous oil and gas seeps originating and contained within the Cretaceous sediments. Data reprocessing should start in March and should take up to six months to complete.
CEO Arthur Halleran said, “The cost of reprocessing is infinitesimal compared to a new 3D shoot of this size.”
01.31.2023
