Anadarko, along with PetroSA, is operating the first exploration period on the block 5/6 and block 7 of the Orange Basin.
As part of the contract, Fugro conducted a survey which included the acquisition of multibeam echo sounder (MBES) data from the MV Fugro Gauss, along with onboard seep mapping interpretation.
The latest survey is part of a greater Seafloor Geochemical Exploration survey, which has been designed by Anadarko and its partners for the blocks.
The 56,000km² MBES survey provided quality bathymetry and backscatter MBES data for the identification of potential, natural hydrocarbon seepage at the seabed.
During the survey, Fugro geoscientists onboard the vessel, carried out mapping of potential seeps, interpreted the surficial sedimentary geology, structural geology and shallow fluid migration systems, and reported the acquired MBES data.
Fugro Survey Africa commercial manager Helle Els said seep hunting needs both MBES bathymetry and MBES backscatter data to be collected and processed in real-time during the survey.
"Our geologists onboard evaluate the data to determine potential seep targets and weight them for a later geochemical coring survey," Els added.
"All technologies and methods used are in accordance with good survey practice and our Fugro team onboard are experts experienced in bathymetric surveys to IHO standards in both data acquisition and processing."
The Orange Basin exploration area covers more than 37,000km² and is situated about 150km to 350km offshore in water depths of between 500 metres and 3,500 metres.
The block’s southern edge is in line with the town of Saldahna and the northern edge is just south of Kleinzee.
Image: Office of Fugro in Netherlands. Photo courtesy of Magalhães.