Gas Gravity Drainage in Fractured Reservoirs Through New Dual-Continuum Approach

Abstract

Summary Present theory assumes that a capillary holdup zone of oil remains in all single matrix blocks in fractured reservoirs producing by gas gravity drainage. Model simulations applying a dual-continuum approach in a conventional reservoir simulator showed that, even with a low degree of continuity through the matrix between the blocks, the oil from the capillary holdup zone in each block is produced. The expected oil production rate and recovery is much higher than predicted by the present theory.