Enhanced oil recovery after polymer flooding by wettability alteration to gas wetness using numerical simulation
Polymer flooding, as one of the Enhanced Oil Recovery (EOR) methods, has been adopted in many oilfields in China and some other countries. Over 50% oil remains undeveloped in many oil reservoirs after polymer flooding. It has been a great challenge to find approaches to further enhancing oil recover...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2018-01-01
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| Series: | Oil & Gas Science and Technology |
| Online Access: | https://doi.org/10.2516/ogst/2018029 |
| _version_ | 1818914186829234176 |
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| author | Li Kewen Cheng Changhui Liu Changwei Jia Lin |
| author_facet | Li Kewen Cheng Changhui Liu Changwei Jia Lin |
| author_sort | Li Kewen |
| collection | DOAJ |
| description | Polymer flooding, as one of the Enhanced Oil Recovery (EOR) methods, has been adopted in many oilfields in China and some other countries. Over 50% oil remains undeveloped in many oil reservoirs after polymer flooding. It has been a great challenge to find approaches to further enhancing oil recovery when polymer flooding is over. In this study, a new method was proposed to increase oil production using gas flooding with wettability alteration to gas wetness when polymer flooding has been completed. The rock wettability was altered from liquid- to gas-wetness during gas flooding. An artificial oil reservoir was constructed and many numerical simulations have been conducted to test the effect of wettability alteration on the oil recovery in reservoirs developed by water flooding and followed by polymer flooding. Production data from different scenarios, water flooding, polymer flooding after water flooding, gas flooding with and without wettability alteration after polymer flooding, were calculated using numerical simulation. The results demonstrate that the wettability alteration to gas wetness after polymer flooding can significantly enhance oil recovery and reduce water cut effectively. Also studied were the combined effects of wettability alteration and reservoir permeability on oil recovery. |
| first_indexed | 2024-12-19T23:42:23Z |
| format | Article |
| id | doaj.art-9b309a8477214fbbb417a5b4e572c298 |
| institution | Directory Open Access Journal |
| issn | 1294-4475 1953-8189 |
| language | English |
| last_indexed | 2024-12-19T23:42:23Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | Oil & Gas Science and Technology |
| spelling | doaj.art-9b309a8477214fbbb417a5b4e572c2982022-12-21T20:01:22ZengEDP SciencesOil & Gas Science and Technology1294-44751953-81892018-01-01733310.2516/ogst/2018029ogst170227Enhanced oil recovery after polymer flooding by wettability alteration to gas wetness using numerical simulationLi KewenCheng ChanghuiLiu ChangweiJia LinPolymer flooding, as one of the Enhanced Oil Recovery (EOR) methods, has been adopted in many oilfields in China and some other countries. Over 50% oil remains undeveloped in many oil reservoirs after polymer flooding. It has been a great challenge to find approaches to further enhancing oil recovery when polymer flooding is over. In this study, a new method was proposed to increase oil production using gas flooding with wettability alteration to gas wetness when polymer flooding has been completed. The rock wettability was altered from liquid- to gas-wetness during gas flooding. An artificial oil reservoir was constructed and many numerical simulations have been conducted to test the effect of wettability alteration on the oil recovery in reservoirs developed by water flooding and followed by polymer flooding. Production data from different scenarios, water flooding, polymer flooding after water flooding, gas flooding with and without wettability alteration after polymer flooding, were calculated using numerical simulation. The results demonstrate that the wettability alteration to gas wetness after polymer flooding can significantly enhance oil recovery and reduce water cut effectively. Also studied were the combined effects of wettability alteration and reservoir permeability on oil recovery.https://doi.org/10.2516/ogst/2018029 |
| spellingShingle | Li Kewen Cheng Changhui Liu Changwei Jia Lin Enhanced oil recovery after polymer flooding by wettability alteration to gas wetness using numerical simulation Oil & Gas Science and Technology |
| title | Enhanced oil recovery after polymer flooding by wettability alteration to gas wetness using numerical simulation |
| title_full | Enhanced oil recovery after polymer flooding by wettability alteration to gas wetness using numerical simulation |
| title_fullStr | Enhanced oil recovery after polymer flooding by wettability alteration to gas wetness using numerical simulation |
| title_full_unstemmed | Enhanced oil recovery after polymer flooding by wettability alteration to gas wetness using numerical simulation |
| title_short | Enhanced oil recovery after polymer flooding by wettability alteration to gas wetness using numerical simulation |
| title_sort | enhanced oil recovery after polymer flooding by wettability alteration to gas wetness using numerical simulation |
| url | https://doi.org/10.2516/ogst/2018029 |
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