Numerical Simulation and Experimental Studies of Oil Recovery via First-Contact Miscible Water Alternating Gas Injection Within Shaley Porous Media

摘要

A series of well-characterized laboratory experiments in two- dimensional homogeneous and heterogeneous beadpacks were carried out. Both simultaneous and slug FCMWAG displacement experiments were performed in the porous media containing discontinuous shale. Simultaneous injection was conducted at WAG ratios of 1:1, 4:1 and 1:4. Slug flooding were carried out at a WAG ratio of 1:1 with slug sizes of 5% PV and 50% PV. All experiments were then modelled using IMPES finite difference simulator without using history matching (all simulations used directly measured porous media properties as inputs) to quantify the accuracy of the simulation when modelling the FCMWAG displacements in a porous media with a discontinuous shale.