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سال انتشار: 1390

محل انتشار: هفتمین کنگره ملی مهندسی شیمی

تعداد صفحات: 9

نویسنده(ها):

mojtaba Safdarian – Iranian Central Oil Fields Company, Tehran, Iran
Mohammad javad Darvishnezhad – Islamic Azad University, Science and Research branch, Tehran, Iran
Ghasem Zargar – Islamic Azad University, Science and Research branch, Tehran, Iran

چکیده:

In the ordinary methods of enhanced oil recovery (EOR), high and inappropriate mobility ratio between the displacing and displacement fluid leads to early gas fingering and reduction of itscontact with the reservoir, which in turn may lead to lowered microscopic efficiency. In order to improve and increase contact surface of fluid with reservoir and prevent from gas fingering, water and gas slugs are alternatively injected into reservoir in a method called water alternating gas(WAG) injection. WAG injection is a modern method of EOR, improves and increases sweep efficiency of gas injection by helping to control and decrease the mobility ratio and stability of gas mobility front, through water injection (because a three-phase region). WAG injection in fivemethods, immiscible, miscible, hybrid, simultaneous and selective simultaneous. In this article, we design injection scenarios and to simulate and study various WAG injectionmethod in a fractured reservoir using GeoQuest commercial software package and ECLIPSE100module on one I.C.O.F.C. oil reservoir. Then efficiency coefficient, residual oil saturation, daily and total oil production are evaluated to find the optimal injection method in each of the abovescenarios. Finally the gas oil ratio (GOR) and water cut by each of injection methods are compared.The results show enhancement of efficiency and production and reduction of residual oil saturation in the method of selective simultaneous WAG injection