Black-Oil Delumping Techniques Based on Compositional Information From Depletion Processes

摘要

Black-oil reservoir simulation still has wide application in the petroleum industry because it is far less demanding computationally than compositional simulation. But a principal limitation of black-oil reservoir simulation is that it does not provide the detailed compositional information necessary for surface process modeling.rnBlack-oil delumping overcomes this limitation by converting a black-oil wellstream into a compositional wellstream, enabling the composition and component molar rates of a production well in a black-oil reservoir simulation to be reconstituted.rnWe present a comprehensive black-oil delumping method based primarily on the compositional information generated in the depletion process that is used initially to provide data for the black-oil simulation in a typical workflow. Examples presented in this paper show the accuracy of this method in different depletion processes: natural depletion, water injection, and gas injection. The paper also presents a technique for accurately applying the black-oil delumping method to wells encountering crossflow.