Modeling of the movement of rich gas in a porous medium in immiscible, near miscible and miscible conditions
Abstract Gas injection is one of the most common enhanced oil recovery techniques in oil reservoirs. In this regard, pure gas, such as carbon dioxide (CO2), nitrogen (N2), and methane (CH4) was employed in EOR process. The performance of pure gases in EOR have been investigated numerically, but till...
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Nature Portfolio
2023-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-33833-5 |
| _version_ | 1797841093001216000 |
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| author | Hossein Mehrjoo Ali Safaei Yousef Kazemzadeh Masoud Riazi Farid B. Cortés |
| author_facet | Hossein Mehrjoo Ali Safaei Yousef Kazemzadeh Masoud Riazi Farid B. Cortés |
| author_sort | Hossein Mehrjoo |
| collection | DOAJ |
| description | Abstract Gas injection is one of the most common enhanced oil recovery techniques in oil reservoirs. In this regard, pure gas, such as carbon dioxide (CO2), nitrogen (N2), and methane (CH4) was employed in EOR process. The performance of pure gases in EOR have been investigated numerically, but till now, numerical simulation of injection of rich gases has been scared. As rich gases are more economical and can result in acceptable oil recovery, numerical study of the performance of rich gases in EOR can be an interesting subject. Accordingly, in the present work the performance of rich gases in the gas injection process was investigated. Methane has been riched in liquefied petroleum gas (LPG), natural gas liquid (NGL), and Naphtha. Afterwards, the process of gas injection was simulated and the effect of injection fluids on the relative permeability, saturation profile of gas, and fractional flow of gas was studied. Our results showed that as naphtha is a heavier gas than the two other ones, IFT of oil-rich gas with naphtha is lower than other two systems. Based our results, gas oil ratio (GOR) and injection pressure did not affect the final performance of injection gas that has been riched in NGL and LPG. However, when GOR was 1.25 MSCF/STB, rich gas with naphtha moved with a higher speed in the domain and the relative permeability of each fluid and fractional flow of gas were affected. The same result was achieved at higher injection pressure. When injection pressure was 2000 psi, movement of gas with higher speed in the domain, alteration of relative permeability and changes in the fractional flow of gas were obvious. Therefore, based on our result, injection of naphtha with low pressure and high GOR was suggested for considered oil. |
| first_indexed | 2024-04-09T16:25:27Z |
| format | Article |
| id | doaj.art-a65207bbea7440ef94e228eba1b78d6c |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-09T16:25:27Z |
| publishDate | 2023-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-a65207bbea7440ef94e228eba1b78d6c2023-04-23T11:16:13ZengNature PortfolioScientific Reports2045-23222023-04-0113111610.1038/s41598-023-33833-5Modeling of the movement of rich gas in a porous medium in immiscible, near miscible and miscible conditionsHossein Mehrjoo0Ali Safaei1Yousef Kazemzadeh2Masoud Riazi3Farid B. Cortés4Department of Petroleum Engineering, Shahid Bahonar University of KermanDepartment of Petroleum Engineering, School of Chemical and Petroleum Engineering, Shiraz UniversityDepartment of Petroleum Engineering, Faculty of Petroleum, Gas, and Petrochemical Engineering, Persian Gulf UniversityDepartment of Petroleum Engineering, School of Chemical and Petroleum Engineering, Shiraz UniversityGrupo de Investigación en Fenómenos de Superficie-Michael Polanyi, Departamento de Procesos y Energía, Facultad de Minas, Universidad Nacional de Colombia Sede MedellínAbstract Gas injection is one of the most common enhanced oil recovery techniques in oil reservoirs. In this regard, pure gas, such as carbon dioxide (CO2), nitrogen (N2), and methane (CH4) was employed in EOR process. The performance of pure gases in EOR have been investigated numerically, but till now, numerical simulation of injection of rich gases has been scared. As rich gases are more economical and can result in acceptable oil recovery, numerical study of the performance of rich gases in EOR can be an interesting subject. Accordingly, in the present work the performance of rich gases in the gas injection process was investigated. Methane has been riched in liquefied petroleum gas (LPG), natural gas liquid (NGL), and Naphtha. Afterwards, the process of gas injection was simulated and the effect of injection fluids on the relative permeability, saturation profile of gas, and fractional flow of gas was studied. Our results showed that as naphtha is a heavier gas than the two other ones, IFT of oil-rich gas with naphtha is lower than other two systems. Based our results, gas oil ratio (GOR) and injection pressure did not affect the final performance of injection gas that has been riched in NGL and LPG. However, when GOR was 1.25 MSCF/STB, rich gas with naphtha moved with a higher speed in the domain and the relative permeability of each fluid and fractional flow of gas were affected. The same result was achieved at higher injection pressure. When injection pressure was 2000 psi, movement of gas with higher speed in the domain, alteration of relative permeability and changes in the fractional flow of gas were obvious. Therefore, based on our result, injection of naphtha with low pressure and high GOR was suggested for considered oil.https://doi.org/10.1038/s41598-023-33833-5 |
| spellingShingle | Hossein Mehrjoo Ali Safaei Yousef Kazemzadeh Masoud Riazi Farid B. Cortés Modeling of the movement of rich gas in a porous medium in immiscible, near miscible and miscible conditions Scientific Reports |
| title | Modeling of the movement of rich gas in a porous medium in immiscible, near miscible and miscible conditions |
| title_full | Modeling of the movement of rich gas in a porous medium in immiscible, near miscible and miscible conditions |
| title_fullStr | Modeling of the movement of rich gas in a porous medium in immiscible, near miscible and miscible conditions |
| title_full_unstemmed | Modeling of the movement of rich gas in a porous medium in immiscible, near miscible and miscible conditions |
| title_short | Modeling of the movement of rich gas in a porous medium in immiscible, near miscible and miscible conditions |
| title_sort | modeling of the movement of rich gas in a porous medium in immiscible near miscible and miscible conditions |
| url | https://doi.org/10.1038/s41598-023-33833-5 |
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