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  • Scale management and risk assessment for deepwater


    I. Collins

    Inorganic precipitates (scales) are one of the major flow-assurance concerns in offshore oil/gas production. Such deposits have the potential for causing severe productivity impacts and can significantly influence lifting costs because of associated intervention costs. While scale control in conventional, shallow-water developments is reasonably mature, deepwater production brings with it a number of additional challenges to the control of inorganic scale. These center mainly around the high costs associated with intervening in deepwater wells, and the challenging infrastructure that such developments are adopting, i.e., highly deviated subsea wells. Because the cost of getting scale management wrong is so high for deep water, increased rigor is required for scale prediction, risk assessment and management for such developments. Discussed herein are methods to assess the risk of scale formation and the applicability/cost-effectiveness of various scale management options, focusing principally on decision tree analysis.

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