Optimal control strategies for oil production under gas coning conditions

Gas coning, which can lead to gas breakthrough in thin oil-rim reservoir fields, may deteriorate economics in oil production. This work reports on optimal control policies to be considered for short-term oil production optimization under gas coning conditions. These policies, incorporating an oil-ra...

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Bibliographic Details
Main Authors: Maree, J. P., Imsland, L.
Format: Conference Proceeding
Language:English
Subjects:
Economics
Optimal control
Optimization
Predictive models
Process control
Production
Reservoirs
Online Access:Request full text
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Summary:Gas coning, which can lead to gas breakthrough in thin oil-rim reservoir fields, may deteriorate economics in oil production. This work reports on optimal control policies to be considered for short-term oil production optimization under gas coning conditions. These policies, incorporating an oil-rate dependent Gas-Oil ratio model, are formulated as an optimal control problem which optimize the oil production rate, subject to gas processing capacity constraints. The result thereof is implemented in a closed-loop receding horizon control policy. Control philosophies investigated for increased oil production optimization include cyclic oil production shut-in at the vicinity of gas breakthrough (limiting the economic-deteriorating effects of excessive gas production, given gas processing constraints), and, steady oil production at-or after- the point of gas breakthrough. Near-well gas coning analysis reveals that gas coning dynamics may indicate which control philosophy (cyclic or steady oil production after process transients) may be optimal during closed-loop process operation.
ISSN:1085-1992
2576-3210
DOI:10.1109/CCA.2014.6981401