BUDE, UK -- The WGP Group has won a third extension to its Chirag Azeri Reservoir Seismic Project (CARSP) Life of Field Seismic (LoFS) survey in the Azeri sector of the Caspian Sea.
WGP has operated a bespoke system for the BP-led Azerbaijan International Operating Co. (AIOC) since 2007. The project is capable of repeat all-azimuth Ocean Bottom Cable (OBC) seismic surveys in this area, enabling AIOC to monitor reservoir fluid movement.
Due to the size of the Azeri-Chirag-Guneshli (ACG) offshore oilfield, WGP designed a solution employing OYO Geospace’s GERI 4C OBC on a semi-permanent basis.
It has also modified the PSV M/V Citadel into an OBC vessel capable of deploying and retrieving up to 132 km (82 mi) of cable across multiple survey areas; monitoring receiver placement via ROV; and providing the seismic source while minimizing operational disturbance in the field.
During 2007-09, three base-line and two repeat surveys were conducted, each with a total average spread of 540 sq km (208 sq mi), with a total of 195,000 shots acquired. Phase II of CARSP started this past April and includes three new base lines and one repeat surveys with total shots estimated at 250,000.
AIOC extends ACG survey contract