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

Abstract

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 (CO₂) in Syrian oil fields (Deirez-zour region, essentially A_lm field), so that CO₂-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-CO₂) by knowing the A_lm characteristics (geological and engineering review) that adapted with CO₂ condition injection and presenting exhaustive screening, it was recommended that CO₂ miscible (water-alternative -gas) or CO₂-WAG has accepted as an effective technique for (EOR) with A_lm reservoir conditions.

The recovery factor predicted by CO₂ 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.