Possible seepage slick within Brazil maritime boundaries.

Distribution of SAR images over Brazil 13th licensing round blocks.

Brazil seepage study NPA’s seepage database contains extensive coverage across offshore Brazil. Seepage detection by SAR (Synthetic Aperture Radar) is a proven technique for mapping surface oil seeps which could provide the first indication of petroleum systems in these basins:

•NPA have 238 interpreted SAR scenes over the Brazil 13th licensing round offshore blocks

•This provides a 10x coverage, with new data being sourced over areas of sparser coverage

BackgroundThe Brazil 13th round offers an interesting mix of basins; from those with no discoveries (e.g. Pelotas) to shallow water extensions of prolific basins (e.g. Campos) to slope and deepwater parts of basins with existing but more moderate reserves (e.g. Espirito Santo, Sergipe Alagaos).

The results of the NPA SAR seepage study hold value in all these basin settings, primarily in the possibility of defining a potential oil kitchen in the Pelotas Basin. Furthermore, any indication of a proximal extension of the Campos Basin petroleum system, away from the established, but less leaky, pre-salt play-fairway, will be of value. Indications of an oil play in the predominantly gas-prone Camumu-Almada basin and of a deepwater extension of the Sergipe-Alagoas Basin charge may also be revealed by this study.

NPA are currently increasing coverage levels of satellite data offshore Brazil, which could potentially uncover temporal repetition over existing slicks or discover new sites of possible seepage. This key information for offshore Brazil is now available from NPA.

Brazil 2015 seepage studyAs a world-leading satellite remote sensing service provider, NPA Satellite Mapping (NPA) detect, interpret, classify and monitor natural seepage and pollution slicks occurring in offshore environments.

Satellite Mapping - Offshore Exploration

Offshore Seeps Study

Brazil 13th licensing round coverage

Seep detection

©ESA 2015

NPA Satellite Mapping

CGG Worldwide Headquarters - Tour Maine-Montparnasse - 33, avenue du Maine - B.P. 191 - 75755 Paris Cedex 15, FRANCE +33 1 64 47 45 00

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Satellite Mapping - Offshore Exploration

Global Offshore Seeps Database

Comprehensive mapping and categorization of offshore oil seeps is essential for efficient offshore oil and gas exploration. Enhanced and interpreted SAR satellite imagery is capable of identifying key regions of seepage, thus focusing exploration efforts and reducing costs.

Coverage •Multiple scene coverage - up to 10x coverage levels becoming

standard

•Optimal satellite SAR data selected from weather screening of the world’s SAR archives

•Data integrated and interpreted with supporting geological, geophysical and geochemical data from Robertson, where available

•New high-resolution data from TerraSAR-X, Radarsat-2 and COSMO-SkyMed satellites used for license studies

Deliverables •Full ArcGIS® deliverables with all scenes and slick images geo-

referenced and hyperlinked

•Unique repeats database comparing seep locations using multi-date coverage

•Results overlaid and compared to collateral data layers including: bathymetry, gravity, sedimentary thickness, magnetics, shipping lanes and shipwrecks

•New ship and rig layers available for all scenes to complement the interpretation

Additional unique features •Repeat database and seepage intensity maps - related to basin

leakiness parameters

•Purchased seep data accessible via the Robertson Tellus geological database

•Complete validation chain available - seeps - multibeam - drop cores - geochemistry - surface sampling

*ArcGIS is a registered trademark of Environmental Systems Research Institute, Inc. (ESRI).

NPA provide global satellite coverage of offshore basins.

An explanation of how seeps form and are detected by satellite.

The principle of seeps

Global offshore seeps coverage

© NPA 2015

© NPA 2015

General Contact Michael King - Offshore Services Manager michael.king@cgg.com Tel: +44 (0)1732 865023

Alan Williams - Oil & Gas Manager alan.williams@cgg.com Tel: +44 (0)1732 865023

cgg.com/npa