TGS initiates offshore eastern India reprocessing project

Feb. 10, 2022
TGS is working on an East Coast India seismic reprocessing project to support the country’s license round schedule.

Offshore staff

OSLO, NorwayTGS is working on an East Coast India seismic reprocessing project to support the country’s license round schedule.

This will cover over 250,000-line km of existing 2D data across an area of more than half a million square km offshore eastern India.

TGS will employ its 2D-cubed technology to develop what the company describes as a single, conformable, easily accessible dataset for exploration/license decision-making purposes.

The dataset will provide coverage of the prospective Krishna-Godavari basin and West Bengal Fan. The data uplift, the company claims, will allow local and international companies to develop structural and geological models in their pre-study evaluation process using a single conformable 3D volume.

2D-cubed involves generating a 3D seismic migration volume from a set of 2D and 3D seismic lines. A structurally conformable interpolation algorithm revitalizes existing 2D multi-vintage and 3D data, with the resultant volume used to support regional interpretation and optimization of subsequent 3D and 2D survey designs.

Previously the company undertook similar projects for basins offshore Timor-Leste and Australia, also applying the technology offshore Sakhalin, eastern Russia, and in the Norwegian and UK North Sea.

This project is approved by India’s Directorate General of Hydrocarbons, and has industry funding. First results will be issued from 1Q 2022.

TGS has also detailed highlights of other ongoing work in its latest results statement.

In the Gulf of Mexico, Engagement Phase 2, a joint venture with Schlumberger, is an ocean bottom node (OBN) project in Green Canyon covering 168 OCS blocks. Acquisition should finish during the current quarter, with processed data available in mid-2022.

TGS, CGG, and BGP are co-operating on a 3D survey offshore Suriname. The first phase will cover around 11,000 sq km (4,247 sq mi), with data acquisition set to be completed this summer.

Offshore Egypt, acquisition for TGS/Schlumberger’s 3D survey over 6,800 sq km (2,625 sq mi) in the Red Sea should conclude toward the end of next month, with final products available in 4Q.

As for the Sarawak 3D survey off Malaysia (in partnership with Schlumberger and PGS), acquisition is due to end in 2Q.

Late last year the company commercialized a new DAS VSP processing solutions for 4D reservoir and carbon storage monitoring, leading to a first 4D project award from a supermajor.

Some of TGS’ clients have raised concerns about declining reserves following sustained reductions in exploration investments. The need to increase reserves, combined with stronger balance sheets and the higher oil price, should lead to greater E&P activity, the company believes.

Finally, the decision by a federal court in the US to vacate the US Gulf of Mexico lease sale that took place in November last year may be appealed, but in practice no further lease sales in the GoM will likely take place until a new five-year lease schedule plan is in place.

Over the past two to three years, there has been a shift in the US GoM from frontier to infrastructure-led exploration, TGS points out, and its recent OBN projects have been primarily directed at held acreage rather than future licensing rounds.

That being so, most of its expected revenues in the US should not be significantly impacted by a temporary halt in GoM acreage awards, TGS concluded.