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OTC 13284 Management of Water Breakthrough Using Intelligent Well Technology
Aleks C. C. Armstrong, ABB Offshore Systems Ltd., and Matthew D. Jackson, Centre for Petroleum Studies, Imperial College of Science, Technology & Medicine, London, UK.
Copyright 2001, Offshore Technology Conference This paper was prepared for presentation at the 2001 Offshore Technology Conference held in Houston,Texas, 30 April–3 May 2001. This paper was selected for presentation by the OTC Program Committee following review of information contained in an abstract submitted by the author(s). Contents of the paper, as presented, have not been reviewed by the Offshore Technology Conference and are subject to correction by the author(s). The material, as presented, does not necessarily reflect any position ofthe Offshore Technology Conference or its officers. Electronic reproduction, distribution, or storage of any part of this paper for commercial purposes without the written consent of the Offshore Technology Conference is prohibited. Permission to reproduce in print is restricted to an abstract of not more than 300 words; illustrations may not be copied. The abstract must contain conspicuousacknowledgment of where and by whom the paper was presented.

the target wells, because oil is simply displaced into the catchment area of other nearby producers. This suggests that IWT is best employed to choke production from wells which are isolated, or far from, other producers. Caution is therefore required when identifying candidate wells for IWT, as production may be reduced rather than enhanced.Introduction Intelligent Well Technology (IWT) has the potential to improve reservoir and well management. An intelligent well system is a combination of: 1 1. Downhole sensors to sample environmental parameters; 2. Downhole actuators to change the operating conditions of the well; and 3. Interpretation and processing algorithms to optimise reservoir/well performance. IWT provides the operatorwith ‘real time’ data from the wellbore, and enables the wellbore architecture to be reconfigured remotely by the operator in response to this data without shutting in the well and introducing a workover rig. Candidates for IWT are remotely located wells where interventions are difficult, and wells with complex wellbore architectures where frequent interventions are required to optimiseproduction.2, 3 The potential benefits of employing IWT have been identified as:4 1. The ability to monitor the pressure of and flow from the reservoir to develop a strategy to optimise recovery; 2. Cost savings from the elimination of rig intervention both for recompleting or the drilling of subsequent wellbore laterals later in the life of the well; and 3. Improved project economics resulting from rateacceleration and added reserves. Further significant benefits include: 4. Improved safety to personnel, as workover activity is contained downhole. This is particularly applicable to sour service wells where personnel may otherwise be exposed to wellbore contents. 5 Cost savings by reducing wellhead and surface facilities. This is of particular importance for topside equipment where rig space isprecious. In this paper, we will focus upon the use of IWT to monitor and optimize production from wells containing a single tubing string completed in multiple pay zones. IWT

Abstract We focus upon the use of Intelligent Well Technology (IWT) to monitor and optimize production from wells containing a single tubing string completed in multiple pay zones. Wells producing under a water injectionprogramme are inevitably susceptible to water breakthrough. Once breakthrough occurs, the operator of the well is faced with a choice between continuing recovery at a reduced rate, or sacrificing recoverable oil. If the well is producing from multiple pay zones then the situation is more complicated, as breakthrough may occur at different times in different layers. IWT allows the operator to regulate...