A field-wide permanent seismic array was installed at the Valhall field during the summer of 2003. The seismic array covers an area of 45sq. km. More than 120 km of permanent 4-component seismic cables were trenched into the seabed and will be used for seismic monitoring through the future life of the Valhall reservoir. The aim is to provide “on demand” images of the 4D seismic responses due to production, to support placement of new wells, to guide interventions in existing wells for improved production rates, and to manage the water injection program currently being implemented over the field. The first survey was acquired late last year, and a second survey is scheduled for February 2004.
展开▼
