The most challenging aspect of reservoir management in a highly fractured carbonate reservoir is determining a completion that has the ability to control the production flux and prevent early unwanted fluid breakthrough while maintaining the production. Throughout the years, Saudi Aramco has made much advancement in the field of reservoir optimized completions, by continuously implementing new technology and techniques that enhance the design and deployment of these completions.
When designing an ICD completion, it is critical to design a completion that is best able to provide production flux control while meeting production requirements, as well as considering key operational factors such as, safety, cost and the time required completing the design.
On a recent well in Saudi Arabia an ICD completion was designed to achieve an optimum lower completion as well as reducing the safety risk, the overall cost of the completion and achieving a faster deployment time by deploying for the first time in the Middle East a new generation of Inflow Control Devices (ICD) in a work-over well.
The new ICD contains several unique features, such as the new third generation ICD flow mechanism, the multi-tasking valve (MTV) and a built-in sliding sleeve. The new third generation ICD flow mechanism is a labyrinth flow path design that is strongly dependent on the fluid density (the lower the density, the lower the pressure drop across the ICD), therefore making the ICD viscosity insensitive to fluids; the ICD is virtually insensitive to viscosities up to 300 cp. Another advantage of the new ICD design is the adjustability of the flow resistance rating (FRR) feature that provides reservoir engineers further option in designing the lower completion. The new ICD design also features the MTV valves, which simplify the deployment of the completion therefore making the deployment operation safer and more cost-effective.