This paper describes two methods for modeling cyclic CO2 injection projects: (1) analytic, based on decline curve analysis, and (2) numeric, based on 2D and 3D compositional radial models derived from detailed geostatistical analysis of near wellbore properties. The application of the decline curve analysis is shown for several published and unpublished CO2 Huff-Puff projects. The numeric models are described for successful and unsuccessful field trials.

Keywords:
fracture, decline curve, machine learning, sensitivity, history, oil saturation, society of petroleum engineers, correlation, huff, hnp response
Subjects:
Reservoir Fluid Dynamics, Improved and Enhanced Recovery, Flow in porous media
Copyright 1991, Society of Petroleum Engineers
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