-
f Numerical Modeling of Carbonated Water Injection into Oil Reservoirs Using Buckley-Leverett Theory Considering the Capillary Pressure
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 79th EAGE Conference and Exhibition 2017 - Workshops, Jun 2017, cp-519-00059
- ISBN: 978-94-6282-219-1
Abstract
The Buckley-Leverett theory is broadly employed in the upstream oil industry. This theorem suffers from the assumption of zero capillary pressure. This paper develops the Buckley-Leverett theory where the capillary pressure is taken into account. This modification on the original form of the Buckley-Leverett equation can extend the applications of this theory towards more accurate results in terms of fluid dynamics in porous media. This work considers a water-oil system with two different boundary conditions; including, constant carbonated water injection rate and constant bottom-hole pressure that simulate real conditions of Carbonated Water Injection (CWI) operations for oil reservoirs. The two-phase numerical modeling of CWI is performed using the MATLAB® software through the Implicit Pressure Explicit Saturation (IMPES) method. Parametric sensitivity analysis is conducted where the effects of the different parameters (e.g., mobility ratio, injection rate, fluids and rock characteristics, time step, and grid size) are studied on the CWI performance, numerical dispersion, and round-off errors. In this work, a black oil simulator is developed where the wettability, capillary pressure, and relative permeability are extensively investigated. This research aims to further understand the CWI processes in oil reserves in terms of recovery mechanisms and practical implications.