East Coast India 2D project targets improved basin analysis

July 21, 2022
Phase 1 has started of the East Coast India 2D reprocessing project.
Offshore staff

SOUTH PERTH, Australia  Phase 1 has started of the East Coast India 2D reprocessing project.

Searcher Seismic, in cooperation with Shearwater GeoServices in India, is reprocessing 10,000 km of multi-vintage 2D data to form a regional 2D grid.

Exploration has delivered discoveries in shallow-water and ultradeepwater from the Ganges Delta to the Krishna-Godavari Basin, with India targeting further giant gas finds to reduce its dependence on coal.

Searcher is leading the program, which aims to provide fresh insights into the source and reservoirs across this margin.

Alan Hopping, general manager of business development said, “Many global studies have now validated the technique of using seismic amplitude characteristics to not only identify hydrocarbon presence in reservoirs, but also to seek the source rocks they came from.”

The technique, which arose from studying the UK’s Kimmeridge Clay Formation, helped to de-risk validation of the source rock for the giant deepwater Venus-1 discovery off Namibia earlier this year, operated by TotalEnergies.

“This technology has proven application on modern reprocessed data and will be directly applicable offshore East India,” Hopping said.

For Phase 1 of the East Coast India project, the modern broadband processing flow on the regional dataset will focus on preserving amplitudes, increasing signal bandwidth, and AVA/AVO-friendly data improvements.

Using 2D de-noise and de-multiple algorithms, the new data have removed artifacts and have improved signal to noise of the key prospective intervals, Searcher reported. On a regional scale deployment, it enables the team to high-grade source kitchens and better constrain sedimentology of the reservoir unit, the company added.

Final real processed products should be available in fourth-quarter 2022.