Enhanced oil recovery and production stimulation
The Enhanced Oil Recovery and Well Stimulation Team has been primarily set up to handle brown field assets with a goal to map residual hydrocarbon reserves and to look for efficient production technologies.
The methods of mapping residual reserves that are being developed by the Science and Technology Center provide a better understanding of the reservoir structure and its current condition. Often they are used to develop unconventional reserves, since residual reserves are known to commonly have a complex geological reservoir structure or specific oil properties. Innovative secondary and tertiary methods of enhancing recovery are also being tested by the Team, e.g. advanced hydraulic fracturing and water-flooding techniques.
Gazprom Neft has a wealth of experience in applying various water-flooding techniques, but it keeps pushing for better response from this enhanced recovery method. Gas injection and acid treatment as enhanced recovery methods are also being tested.
As part of this effort, a joint project with Wintershall is under way, which looks at ways of improving water-flooding response and develops polymeric fluids to cut the chemicals costs of water flooding by 20-70% . One of the technologies tested with the participation of the STC team, is the ASP (Alkaline-Surfactant-Polymer) flooding at the West Salym field.