SPE Annual Technical Conference and Exhibition 2010
DOI: 10.2118/135304-ms
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A two-stage well placement optimization method based on adjoint gradient

Abstract: As well locations are represented as integer well gridblock indices in reservoir simulators, determining optimal well locations is most naturally treated as a discrete optimization problem. A few recent papers in the literature have attempted to convert this discrete optimization problem into a continuous optimization problem, but most of these papers require that one specify a priori both the number of wells to be drilled and the operating rates (or bottomhole pressures) for the specified operational life of … Show more

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Cited by 62 publications
(23 citation statements)
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“…Well location optimization algorithms often run all iterations within commercial high fidelity reservoir simulators, although use of proxy modeling is becoming more prominent. Independent well placement optimization is often determined after specifying the total number of wells and the operational variables, such as injection rate or bottom hole pressure for the lifetime of the reservoir, and then applying an optimization algorithm [86]. Well placement optimization performed independently of well control optimization tends to lead to a lower NPV [87], nevertheless well placement optimization is more easily implemented when performed independently of well control optimization.…”
Section: Well Placement Optimizationmentioning
confidence: 99%
“…Well location optimization algorithms often run all iterations within commercial high fidelity reservoir simulators, although use of proxy modeling is becoming more prominent. Independent well placement optimization is often determined after specifying the total number of wells and the operational variables, such as injection rate or bottom hole pressure for the lifetime of the reservoir, and then applying an optimization algorithm [86]. Well placement optimization performed independently of well control optimization tends to lead to a lower NPV [87], nevertheless well placement optimization is more easily implemented when performed independently of well control optimization.…”
Section: Well Placement Optimizationmentioning
confidence: 99%
“…The implementation of the procedure in that work was seen as inefficient, though, since only one well could be eliminated at each iteration of the optimization process. In Forouzanfar et al (2010) the well placement problem is also converted into a continuous optimization problem, while an initialization step is also introduced to determine total injection and production rates for the problem. Other approaches have mimicked a more traditional approach of computing finite differences.…”
Section: Well Placement Partmentioning
confidence: 99%
“…There have, however, been approaches that use the reactive control strategy described above in well placement optimizations (e.g., Zandvliet et al, 2008). The work introduced in Wang et al (2007), and later enhanced in Zhang et al (2010) and Forouzanfar et al (2010), aims primarily at well placement, and integrates indirect mechanisms for optimizing well controls. The method described in that work provides a comprehensive optimization framework, but it involves a number of heuristics and does not treat explicitly location and control as optimization variables.…”
Section: Introductionmentioning
confidence: 99%
“…The gradient-based optimisation has been used to obtain the optimum well placement and well trajectory for horizontal wells (Bangerth et al, 2006;Forouzanfar et al, 2010;Sarma and Chen, 2008;Wang et al, 2007). The main advantage of the gradient-based optimisation is that optimal solutions could be found quickly.…”
Section: Introductionmentioning
confidence: 99%