PGS has won a contract with Perupetro to a shoot a 3D megasurvey along the coastline of Peru.
PGS has won a contract with Perupetro to a shoot a 3D megasurvey along the coastline of Peru.
The survey comprises 21,000 km2 of 3D seismic data that will be matched and merged, together with 23,000 km of 2D data. The dataset will be converted into depth from a seismic-horizon-constrained velocity model that extends through five different basins, from the prolific Talara basin in the north to the frontier basins in the extreme south.
MegaSurveys are very large, merged, post-stack datasets consisting of multiple surveys that have been rebinned to a common grid and then matched to produce a phase-balanced and uniformly scaled contiguous regional volume, said PGS.
Their regional nature permits fuller exploration of tectonic and basin developments, leading to a greater understanding of existing and potential petroleum systems.
‘The PGS Peru MegaSurvey covers both existing discoveries and licensing opportunities in open blocks. It can be used to pick prospects or to evaluate the successes and failures so far across the entire region,’ said PGS.
The Peruvian continental margin is characterized by the Peru-Chile trench, where the Nazca Plate converges obliquely and subducts beneath the South American Plate. This margin is a classic accretionary prism, comprising a series of Mesozoic-Cenozoic fore-arc basins that form the continental slope.
These basins are separated by rotated basement highs, generated by strike-slip faulting. Intermittent reactivation of these basement faults caused the extension and inversion of several offshore basins during the Cenozoic period.
The diverse regional geology provides a range of structural and stratigraphic traps with reservoir intervals spanning the Paleozoic-Tertiary period, including mature basins with producing fields to the north and underexplored frontier basins to the south.
The first merged product from the PGS Peru MegaSurvey will be available from Q1, 2020.
