Intelligent Completions and Horizontal Wells Increase Production and Reduce Free-Gas and Water in Mature Fields | Schlumberger
Tech Paper
Society
SPE
Paper Number
139404
Presentation Date
2010
Products Used
Premium

Intelligent Completions and Horizontal Wells Increase Production and Reduce Free-Gas and Water in Mature Fields

Abstract

The maturity of the giant fields has resulted in a large number of complex operational and reservoir management problems. The reservoirs pressure has substantially dropped as a natural outcome of the accelerate production rhythm sustained by the field during the productive life. The gas-oil contact and oil-water contact have reached the production intervals in many wells. Horizontal wells have proved to be a valid alternative to drain narrow oil columns in this naturally fractured reservoir. To be able to recover the reserves at sufficiently high rates, new ideas and state of the art technologies need to be implemented to innovate the production process, particularly well completions, to maintain the oil production plateau.

In the mature fields the objective is to maximize production rates to effectively drain the reserves, while minimizing intervention costs. Intelligent wells will be used to increase productivities and recoveries in a less expensive manner, and to significantly reduce the production of free gas and water.

The proposed innovative completion system consists of remotely actuated flow control systems with permanent downhole gauges to permanently monitor the production variables and take actions in real time. This alternative is significantly more effective than the traditional procedure, consisting of selective completions that require expensive subsea interventions to close one zone to open the next one.

In this work, the applicability of multi-purpose intelligent completions for highly productive oil reservoirs has been evaluated from both, the productivity and the operational standpoints. Mandrels will be fitted with intelligent gas lift valves that can be operated from the surface, using downhole gauges for reservoir and production surveillance. Design criteria will be discussed in detail to verify that every productivity case is fully optimized.

Products Used

Share This