بهبود استراتژي هاي تزريق آب (آب افزايي) به منظور كاهش ميزان آب توليدي (برش آب) و افزايش ضريب بازيافت نهايي

This research aims to improve water injection strategies in mature oil fields to mitigate the sharp rise in water production (which can exceed 90%) an‎d increase the final oil recovery factor (ERF) by integrating advanced digital models an‎d chemical injection techniques. The study relied on constructing a 3D virtual reservoir model in a 5-spot pattern using the CMG package (IMEX, Builder, Results Graph, STARS), with rock an‎d fluid characteristics similar to mature fields like Komkol. Five operating conditions were then performed: conventional injection, stratified control, increased injection rate in low-permeability formations, injection stoppage, an‎d polymer injection. The results were analyzed using water production curves, ERF, an‎d 2D an‎d 3D saturation maps, with t-tests performed at a 95% significance level to test hypotheses related to pattern optimization, improved injection conditions, polymer use, an‎d the sensitivity analysis efficiency of CMG. The results showed the superiority of the polymer injection scenario, with the cumulative oil yield increasing from approximately 40,000 barrels in the steam scenario to 60,000 barrels, representing an increase of nearly 50%. This was accompanied by a significant slowdown in the rise of the water content compared to the steam, cold water, an‎d injection cessation scenarios. This confirms that optimizing the viscosity of the injection medium an‎d controlling the injection pattern can form a practical framework for applying chemical EOR techniques in advanced Syrian oil fields, provided they are supported by further local laboratory studies.

محسن محمدي

حميدرضا شاه وردي , روح اله هاشمي