OSLO, Norway — PGS has released the first data from its new Pacific MegaProject covering prospective areas across much of Colombia's offshore Tumaco and San Juan basins.
The company has reprocessed all available data in the target area to produce a single unified and rejuvenated MegaProject dataset. This is said to provide new insights into potential petroleum system elements and possible hydrocarbon-bearing traps.
MegaProjects are merged, post-stack datasets comprising multiple 2D and 3D surveys matched and merged to deliver a uniformly scaled, contiguous regional volume.
The Tumaco/San Juan basins area is characterized by a forearc basin structural style in convergent margins, PGS said, related to the subduction of the Nazca Plate beneath the western part of South America.
Along the Colombia pacific margin, thick Cenozoic sedimentary sequences have accumulated over blocks of transitional and oceanic-crust basement that developed from the Late Cretaceous and Early Cenozoic eras. The overlying sedimentary fill is mainly from the Tertiary.
The potential petroleum system is connected to late Cretaceous and early Tertiary source rocks that have migrated to turbidite fan systems associated with the Miocene interval. Middle-Upper Miocene shales combined with early-middle Miocene mud provide trap and seal.
“These basins have significant exploration potential,” said Sharon Walker, vice president of sales NSA at PGS.