TGS-NOPEC Geophysical Co. AS has commenced a new seismic survey —Declaration— in the Central Gulf of Mexico, expanding its Constitution group of WAZ 3D projects.
The Declaration survey will cover 6061sq km (260 OCS blocks) in the Mississippi Canyon and Viosca Knoll areas. The survey areas are orthogonal to TGS' Justice WAZ 3D survey.
With offsets to 16km, the data will be acquired by CGG with a single-pass vessel configuration derived from its StagSeis technology. TGS says this will better image deep structural elements and improve subsalt and salt flank illumination, establishing new data standards in the region.
TGS will process data as a stand-alone volume and will also integrate the new survey with the company's existing Justice data, to provide orthogonal, wide-azimuth (M-WAZ) coverage over the area. TGS says the data will be processed using the latest TGS imaging technology including Clari-Fi and Orthorhombic migrations.
Rod Starr, SVP Western Hemisphere for TGS said, "Commencement of this survey marks a milestone in new, long offset data acquisition for TGS and represents the first data acquired orthogonal to and covering the Cretaceous shelf region. The M-WAZ data will provide significant insight into potential eastern sediment sources for reservoir grade sands and will aid the industry in preparation for significant upcoming Central Gulf of Mexico lease turnover."
Acquisition will commence in October 2014, using five vessels from the CGG fleet. Preliminary data will be available to the industry at the beginning of 2015, before OCS Lease Sale 235.
Photo at right: Seismic vessel Polarcus Adira, built to SX134 design from ULSTEIN, was named at Ulstein Verft on 21 June 2012. It's being used on TGS' concurrent Panfilo survey in the deep water Gulf of Mexico.
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