TGS has commenced a large, two dimensional (2D) Prestack Depth Migration Seismic Reprocessing project in deepwater São Tomé and Príncipe.
The programme, in partnership with the Agência Nacional do Petróleo de São Tomé e Príncipe (ANP-STP), covers a full reprocessing of 14,651 kilometres of 2D seismic data, encompassing four input surveys originally acquired by TGS between 1999 and 2005.
The data was previously reprocessed by TGS in 2014.
“This new project applies a modern, comprehensive workflow, combining advanced pre-processing with velocity model building via Dynamic Matching elastic Full Waveform Inversion (E-DMFWI) and Kirchhoff Prestack Depth Migration (KPSDM), to deliver a significant step-up in imaging quality and interpretation confidence”, TGS says.
This project is supported by industry funding.
“Offshore São Tomé and Príncipe presents a demanding subsurface environment, with volcanic activity, shallow channelization and pervasive mass transport complexes historically limiting the clarity of legacy seismic imaging and depth positioning of targets”, TGS explains in a statement.
“The 2D PSDM Reprocessing project is designed to resolve these specific challenges, giving operators a clearer, more geologically consistent view of the subsurface in areas where earlier vintages of data have struggled to image”.
A priority subset of lines will be delivered within seven months, with final products for the full dataset expected in the third quarter of 2027, the service provider promises.
