Paper submitted to the 2nd EAGE Workshop on New Discoveries in Mature Basins, by Jyoti Kumar (TGS)
Summary
A recent Sarawak seismic imaging project covered several offshore fields in Malaysia, located in water depths ranging from approximately 80 to 160 meters. These shallow to intermediate water depths and the nature of the water bottom resulted in strong multiple contamination. The geological setting is complex, marked by extensive fault systems that generate seismic shadow zones in legacy data, as well as the presence of shallow gas and highly absorptive overburden bodies.
The study area spans approximately 2,812 km² of high-quality multisensor 3D seismic data acquired in two phases: the first in 2017 using a proprietary CSI acquisition technique, and the second in 2023 utilizing a triple-source configuration. All datasets were processed from raw hydrophone and particle-velocity measurements through a comprehensive processing and imaging workflow designed to overcome these challenges and deliver a single, seamless seismic volume for detailed structural and quantitative interpretation.