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    Record-breaking ultra-deepwater 4C 3-D survey completed

    Projects and Operations // July 22, 2005
    Seismic survey company PGS reports that its FOURcE seafloor seismic crew has completed the industry's first ultra-deepwater 4C 3-D survey.

    Acquired over a portion of Brazil's Roncador field in the Campos Basin, the survey broke the existing deep water record for seafloor seismic 3-D work.

    Water depths reached 1,860 m - three times those experienced earlier during the Viola 3-D in the Campos Basin.

    "To put this feat in perspective," said PGS, "consider that seafloor seismic activity in the North Sea has been limited to water depths of less than 400m. Surveys elsewhere have usually been in water depths less than 150m. There had been no sustained production by any seafloor system (using cables or nodes) in water depths greater than one-third the depth of Roncador."

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