Appraisal of a
Supergiant: The Kashagan Field,
William, Agip Kazakhstan North Caspian Operation Co. N.V,
The Kashagan field is located on the
The Kashagan appraisal program included acquisition of a state-of-the-art 3D seismic dataset and a sequence of wells that were designed to assess the potential of the structure as rapidly as possible. Due to water depths that range from 3 to 8 m, approximately 1600 km2 of OBC seismic data were acquired and processed to better image the reservoir. Appraisal wells have been strategically located to test the geological model and to assess reservoir quality across the structure. Well logs, core data and vertical seismic profiles were also used to tie in the 3D seismic data set in order to correlate reservoir intervals between wells.
The drilling of the Kashagan East – 3, Kashagan East – 5 and Kashagan East – 6 appraisal wells confirmed the presence of cyclic, shallow-water platform carbonate facies across
the platform interior. The Kashagan East – 2 and Kashagan East – 4 appraisal wells support the presence of a platform rim with enhanced reservoir quality and strengthen the geological model. Further development drilling and integration with 3D seismic will allow for continuing definition of the resource.