Research Article
Experimental Study on the Oil Recovery Performance of CO2 Huff-and-Puff Process in Fractured Tight Oil Reservoirs
Table 5
Production status of different depressurization methods.
| | Depressurization method | Back pressure (MPa) (production pressure) | Production valve (throttle valve) | Oil recovery factor of depletion (%) | Oil recovery factor of first cycle (%) |
| | Rapid | 0 | 50% open | 13.43 | 14.65 | | Slow | 0 | 10% open | 13.29 | 17.24 | | Step | 16-12-8-4-0 | 50% open | 13.40 | 18.40 |
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