A New Approach to the Modeling of a Simple Re-infiltration Gravity Drainage Process in Naturally Fractured Reservoirs

摘要

One of the most important concerns regarding prediction of production performance in naturally fractured reservoirs is the issue of re-infiltration phenomena. In this study, the modeling of a simple re-infiltration process with no effect of capillary continuity between blocks is presented by extending the gravity drainage meclianism for a single block. First, a qualitative analysis of the gravity drainage process through porous media was conducted and the role of gravity and capillary forces was investigated. Then a model for one-dimensional gravity drainage in a single block was developed in dimensionless form, a modified version of which can be found in the literature. Then, using the method of separation oj variables, the corresponding partial differential equation was solved for a single block with certain boundary and initial conditions.