Foam-Assisted Air Injection in Ultralow-Temperature Tight Oil Reserviors: Experimental Study and Pilot Test
- Авторы: Yang X.1, Guo P.1, Zhang X.2, Deng J.1
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Учреждения:
- State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University
- Ganguyi oil production plant, Yanchang Oilfield Co., LTD
- Выпуск: Том 54, № 3 (2018)
- Страницы: 367-371
- Раздел: Article
- URL: https://journal-vniispk.ru/0009-3092/article/view/235532
- DOI: https://doi.org/10.1007/s10553-018-0934-7
- ID: 235532
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Аннотация
Foam-assisted air injection is widely used for enhanced oil recovery (EOR) in reservoirs of China. However, its application to ultralow-temperature tight oil reservoirs is poorly studied. In this paper, the dynamic and static oxidation characteristics in Chang 6 tight oil reservoirs are studied experimentally. A mechanism for the physical and oxidation processes is proposed based on the experimental data. The results show that the oxidation rate increases at high pressure so that oxygen consumption increases and CO2 production decreases. The CO2 production rate under static oxidation conditions is 0.66% as compared with 0.31 % for dynamic conditions at a reservoir temperature of 28 °C. Foam is found to prevent oxidation although increasing pressure can diminish this effect. The oxygen concentration under dynamic oxidation conditions decreases to 10% in 3600 to 2400 hr at pressures of 4-14 MPa. Pilot tests show that the well water-cut drops from 87.13 to 66.15% whereas the daily oil production increases from 0.22 to 0.46 m3. The results confirm that foam-assisted air injection is promising for EOR in ultralow-temperature tight oil reservoirs.
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Об авторах
Xingli Yang
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University
Email: mat_swpu@126.com
Китай, Chengdu
Ping Guo
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University
Автор, ответственный за переписку.
Email: mat_swpu@126.com
Китай, Chengdu
Xinchun Zhang
Ganguyi oil production plant, Yanchang Oilfield Co., LTD
Email: mat_swpu@126.com
Китай, Yan’an
Jiangming Deng
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University
Email: mat_swpu@126.com
Китай, Chengdu
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