1 | Saturate the core with water, measure pore volume of spliced core | Temperature of 42 °C, Pressure of 15.02 MPa | Temperature of 42 °C, Pressure of 15.02 MPa |
2 | Saturate the core with oil to simulate bound water | Temperature of 42 °C, Pressure of 15.02 MPa | Temperature of 42 °C, Pressure of 15.02 MPa |
3 | Age the oil saturated core for one month | Temperature of 42 °C, Pressure of 15.15 MPa | Temperature of 42 °C, Pressure of 15.15 MPa |
4 | Depletion development | Pressure dropped from 15.15 MPa to 8.11 MPa | Pressure dropped from 15.15 MPa to 8.11 MPa |
5 | Water flooding | Outlet pressure kept at 8.22 MPa, stopped until water cut was 100% | Outlet pressure kept at 8.22 MPa, stopped when recovery was 24.79% |
6 | Increase pressure by flue gas | | Increased pressure to 12 MPa |
7 | Continuous flue gas flooding | Outlet pressure kept at 8.22 MPa, stopped when there was no oil and little liquid produced | |
8 | Flue gas-water alternative flooding | At the outlet pressure of 8.22 MPa and injected gas-water ratio of 2∶1, the flooding stopped when only gas was produced, with 5 cycles in total | At the outlet pressure of 12 MPa and injected gas-water ratio of 2:1, the flooding ended when only gas was produced, with 8 cycles in total |
9 | Continuous flue gas flooding | | At the outlet pressure of 12 MPa, the flooding stopped when only gas was produced with a total injection volume of 7 times HCPV |
10 | Storage | Till pressure increased to 20 MPa | |
11 | CO2 flooding | At the outlet pressure of 8.22 MPa, the flooding ended when only gas was produced | |
12 | Continuous injection of flue gas | At the outlet pressure of 8.22 MPa, H2S content of produced gas was measured | |