Optical Sensor and Accelerometer Revolution for Seismic Monitoring and Acquisition

Fiber optic sensor systems have been under development for many years. PGS has produced prototype seismic equipment to demonstrate the optical technology. In 2003 and 2004 a 4C seabed cable has been successfully demonstrated during field operations in the North Sea. Data collected from the field tests have proven the prototype optical system meets the performance required of the deepwater seismic operation. Presently a new 4C seabed system, based on a fiber optic high sensitivity accelerometer, is under development. This new system is an excellent fit for conventional 4C seismic operations but would be the preferred solution for permanently installed reservoir monitoring systems. Some of the advantages we expect to realize from an optical system include: no in-sea electronics, improved reliability, lighter weight, significantly reduced deployed system cost and improved operational safety.