الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 179 |  |  |
| | | from | 179 | | |
Abstract
A large number of the Western Desert water flooded sandstone oil reservoirs has reached the economic limit or even got close to it. Continuous production from those reservoirs under traditional secondary recovery of water flooding operations has no longer economic. Of these is the AEB-3C oil reservoir of field (A) in the Western Desert of Egypt. CO2 miscible displacement is one of the EOR methods which shows successful results in many oil fields around the world. In this thesis a numerical simulator was used to study the potential of CO2 flooding processes. The purposes of this study were (1) to determine the expected increase in the recovery factor due to this method, (2) determining the optimum injection rate of CO2, (3) showing the difference in effect between pure and impure CO2 and (4) determining the best mode of operation that is straight CO2 injection or water alternating gas injection (WAG), in addition to showing the effect of oil price on the method in our case. The reservoir under study is a sandstone reservoir containing black oil of 38⁰ API and of 0.303 cp viscosity at reservoir temperature of 238⁰F. The reservoir depth at 10500 ft MD and average thickness 40 ft with a porosity range of 9-19% and 112 mD average permeability. The subject reservoir has been producing under a successful waterflooding project since May-2010. The recovery factor by the end of water flooding project is predicted as 32%. CO2 flooding processes have started by the end of water flooding. A significant increase in the oil recovery factor was noticed due to applying this method. Comparisons between different modes of operations are shown. In addition to a comparison between pure and impure CO2 which showed very close results.