Norway’s Equinor Awards Shearwater GeoServices Contract for 4D Survey at Tyrihans Field

Norway’s state-owned energy company Equinor has contracted compatriot marine geoscience and technology company Shearwater GeoServices to perform a 4D survey over its Tyrihans field in the Norwegian Sea.

Located 25 kilometers southeast of the Åsgard field in water depth of 270 meters, Tyrihans was discovered in 1983 and the plan for development and operation (PDO) was approved in 2006. The field is developed with five subsea templates tied back to the Kristin platform, with production starting in 2009.

The Norwegian Offshore Directorate notes that drilling new wells at Tyrihans is challenging due to reservoir depletion. Ongoing efforts to increase recovery for both oil and gas include work on low-pressure production and possibilities for infill wells. In 2024, a new production well was drilled on the field.

Shearwater’s one-month 4D towed streamer seismic survey, starting in early August, will utilize the Amazon Conqueror vessel equipped with Isometrix technology. This project is the first awarded under the 2021 Equinor frame agreement extension.

Following successful 4D campaigns at the Mariner and Heidrun fields last year, Shearwater’s technology will capture high-quality seismic data to understand reservoir changes over time at Tyrihans, supporting future production strategies for optimization.

“The award reflects Shearwater’s strong technical capabilities and consistent operational reliability. Finding good solutions together with our clients is always a priority for us. In this case, we can provide our client with updated reservoir data to support long-term production optimization and value creation,” said Irene Waage Basili, CEO of Shearwater GeoServices.

Shearwater recently ordered two XL work-class remotely operated vehicles (WROVs) from Argus Remote Systems for deepwater operations.