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The heavy oil found in Peregrino comes with its own set of challenges. Our experience from other challenging fields and use of various types of technology enable us to work with the Peregrino oil. Statoil has applied technology and solutions that were developed in other locations to come up with a cost-effective production solution for this field.
The deposits are located some 2,300 metres below the seabed. Reaching such a depth required the use of the same horizontal drilling techniques that we applied e.g. at the Grane heavy oil field in the North Sea. By applying technology such as produced water injection, horizontal wells and flow assurance in order to sustain the project in the long term, the recovery rate has been practically doubled compared to initial assessments.
Statoil's technologies for increasing recovery factor in heavy oil fields such as Peregrino include:
- Multilateral wells: Using multilateral wells makes it possible to significantly increase drainage by accessing multiple reservoirs or various areas within the reservoir simultaneously. Increasing the reservoir's exposure enables us to increase the field's production capacity and reduce its overall development costs.
- Electric submersible pumps (ESPs): Statoil has developed studies together with suppliers to increase both the service life and the efficiency of its equipment.
- Inflow control device (ICD) and autonomous inflow control device (AICD): By using these valves, Statoil can increase production efficiency by reducing the water produced in the wells.