AL-Obaidi S.H.1), Chang Wj.2), Hofmann M.1)
1) Mining Institute – Saint Petersburg (Russia)
2) Department of Petroleum Engineering, University of Xidian (China)
Abstract. In this study, water injection and gas injection technologies are examined for their effectiveness in developing oil rims in gas fields. Considering the need for advanced development of the oil rims within a short period of time, reservoir simulation methods using horizontal wells have been used to rationally develop oil rims. It was confirmed that large volumes of gas must be injected to maximize oil recovery. This happens when gas breakthroughs from the gas cap into the bottom of the production well and from the injection well into the gas section. A cycle process was discovered when gas injection led to the development of an oil rim. The condensate from the gas was taken out, and the dryer gas was then injected back into the reservoir. Condensate concentrations in the gas, especially those near the oil rim, are a major factor contributing to the interest in the proposed concept.
Keywords: gas injection; water injection; oil rim; reservoir simulation; oil recovery