The geophysical company CGG Multiclient and New Ventures (CGG) proposes to acquire a multi-client three- dimensional (MC3D) marine seismic survey (MSS) off the North West Shelf (NWS) offshore from Western Australia (WA).
The Davros MC3D survey area is located ~52 km northwest of Dampier and the north-eastern corner of the survey area is located ~212 km northwest of Port Hedland. Legendre Island in the Dampier Archipelago is ~40 km to the east of the survey area. The southwest margin is located ~6 km north of Trimouille Island (in the Montebello Island group) and ~38 km north of Barrow Island. The Glomar Shoals are within the northern section of the survey area. The survey area overlaps the multiple use zone (MUZ) of the Montebello Commonwealth Marine Reserve.
Water depths across the survey area range from ~20 m to ~300 m, with the deepest water depths situated in the northeast section of the survey area, correlating with the Ancient Coastline feature at the 125 m depth contour.
During the proposed activities, the survey vessel will traverse a series of pre-determined sail lines within the survey area at a speed of approximately 8-9 km/hr. As the vessel travels along the survey lines a series of noise pulses (every 8-10 seconds) will be directed down through the water column and seabed. The seismic array will comprise of eight to 12 solid streamers, with a maximum length of 8,100 m. Streamer spacing will be between 50 and 100 m and line spacing will be between 500 and 1,000 m.  The operating pressure for the airgun array will be approximately 2,000 psi.
The commencement date of the Davros MC3D MSS is yet to be finalised, CGG plans to commence the Davros MC3D MS survey no earlier than Q2 2014, however this is subject to availability of the survey vessel for conducting the survey, client data requirements, fair sea state conditions suitable for marine seismic acquisition, and granting of approvals from the appropriate government bodies. The Davros MC3D MSS is expected to extend for a total duration of ~9 months but may be conducted in phases depending on weather and vessel availability.
Note: This information has been extracted from the EP Summary. Please refer to the attached EP Summary for more information.