Geoscience firm CGG is conducting a multi-client surface geochemistry survey to identify seafloor seepages of hydrocarbons in the south-eastern Barents Sea, Norway.

The survey, pre-funded by several oil firms, covers all blocks in the region recently proposed for licensing by the Norwegian Petroleum Directorate.

The survey intends to identify active petroleum systems in the area and prospective structures of all sizes.

Geochemical analysis of the gaseous and liquid hydrocarbons in the sediments will help identify the gas or oil-affinity of the petroleum systems and the sourcing/maturity of the hydrocarbons.

Oil firms can use the data to de-risk the areas before undertaking additional detailed investigations.

The company said the survey is also important in limiting future environmental issues, such as over-drilling, and in estimating background levels of natural seafloor seepage pollution.

"The final report for the survey is expected to be unveiled in December 2014."

CGG said the collected data will be processed to provide a full geochemical interpretation report, including anomaly mapping in ArcGIS format for assimilation into clients’ own seismic or geological databases.

The final report for the survey is expected to be unveiled in December 2014.

CGG geology, geophysics and reservoir division senior executive vice-president Sophie Zurquiyah said: "Our Barents Sea oil and gas seep survey is part of our rich multi-disciplinary multi-client data library that we are developing in the region.

"It complements existing exploration products ranging from our offshore hydrocarbon seeps database and regional gravity and magnetics coverage to our state-of-the-art BroadSeis surveys."

Image: Location of CGG’s multi-client oil and gas seep survey in the south-eastern Barents Sea. Photo: courtesy of CGG.

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