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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
COMPARISON OF COUPLING STRATEGIES TO INCORPORATE RADIAL INFLUX EFFECTS IN WELL-RESERVOIR COUPLING
Submission Author:
Rafael Alves , SC
Co-Authors:
Rafael Alves, Marcus Vinícius Canhoto Alves
Presenter: Rafael Alves
doi://10.26678/ABCM.ENCIT2020.CIT20-0132
Abstract
The coupling of well and reservoir is one of the most studied topics of petroleum engineering during the last 30 years. Although there are many models for coupling a vertical well with a reservoir, these models frequently do not consider pressure losses due to acceleration and frictional effects on the production zone, which is justified by the fact that these are small contributions, which is probably correct for most wells, but is unclear to determine which is the minimal length of a production zone to consider these effects important. This work was a first step on this kind of investigation since it focusses is to introduce 4 coupling strategies and to observes the reliability and the efficiency of each one of them. These 4 coupling strategies are a consequence of introducing production zone in the problem, since this region requires the existence of two coupling points the well was separated in two regions, and the order of simulation of these two regions as well as the number of loops in the iteration process were the points of differentiation between these 4 strategies. To evaluate the coupling strategies, 8 production scenarios were simulated, and an exploratory analysis of results was performed. The exploratory analysis shows that more important than the order of simulation is the number of loops in the process, strategies with one loop are less susceptible to numerical errors, and strategies with two loops required least iterations to advance a time-step.
Keywords
Coupling strategy, Well-Reservoir Coupling, petroleum production, Two-phase Flow
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