Feasibility of Increasing Oil Recovery by CO2 Injection in Syrian Fields (Deir ez -Zour Region)

Oil-production from enhanced oil recovery (EOR) project continues to supply an increasing percentage of the world's oil, about 3% of the worldwide production Now comes from (EOR), and this percentage is increasing with time, because of the conventual's oil production has continued to full and is not -currently -enough effective, therefore, the importance of choosing the "best" recovery method becomes increasingly important to petroleum engineers.The objectives of this research: to present technical and economical feasibility for (EOR) by using miscible carbon dioxide (CO 2 ) in Syrian oil fields (Deirez-zour region, essentially A lm field), so that CO 2 -EOR improvement displaces oil left in place (after primary production and secondary water flooding which has been successfully injected in these fields for many years) via achieving several properties especially:1) Reduction of oil viscosity, 2) Swelling of oil volume and 3) Acidic effect on rock.The candidate A lm field in Deirez-zour was studied in order to determine potential (EOR-CO 2 ) by knowing the A lm characteristics (geological and engineering review) that adapted with CO 2 condition injection and presenting exhaustive screening, it was recommended that CO 2 miscible (water-alternative -gas) or CO 2 -WAG has accepted as an effective technique for (EOR) with A lm reservoir conditions.The recovery factor predicted by CO 2 in A lm about 12% OOIP (original oil in place), that mean about 32 MMBO (million barrels of oil).Economical analysis: (capture, compression, transportation and injection costs), capital expenditures (CAPEX), operational expenditures (OPEX) were presented depending on previous and current onshore experience. 1-IntroductionFor the last three decades, scientists have been searching for techniques to recover more oil from depleted reservoirs, which still contain as much as 50% of original oil in place (OOIP) after primary and secondary recovery, These techniques are known as EOR, so EOR is any method that increase oil production by using materials that are not part of normal pressure maintenance or water flooding operation, for example, natural gas can be injected into a reservoir to "enhance" or increase oil production Figure Shows Oil Recovery Methods Screening criteria for different EOR methods are shown in the following table: