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Results
Carbon Dioxide Injection Pressure and Reservoir Temperature Impact on Oil Recovery from Unconventional Shale Reservoirs During Cyclic CO2 Injection: An Experimental Study
Fakher, Sherif (Missouri University of Science and Technology) | Ahdaya, Mohamed (Missouri University of Science and Technology) | Elturki, Mukhtar (Missouri University of Science and Technology) | Imqam, Abdulmohsin (Missouri University of Science and Technology)
Abstract Carbon dioxide (CO2) injection has recently been applied in unconventional shale reservoirs to increase oil recovery. There are many methods by which CO2 can be injected. One of the most common methods, especially in unconventional reservoirs, is cyclic CO2 injection. This research experimentally investigates the ability of cyclic CO2 injection to increase oil recovery from unconventional shale reservoir, and the impact of reservoir thermodynamics, including pressure and temperature, on the oil recovery potential. The experiments were conducted using a specially designed vessel to mimic the cyclic CO2 injection operation. The shale cores were saturated with crude oil for seven consecutive months at high temperature. The cores were then placed in the huff-n-puff vessel and the experiment was commenced. The pressure and temperature conditions were found to have a strong impact on oil recovery, especially as the injection cycles progressed. The thermodynamic conditions were also found to impact the core integrity greatly, with some cores breaking at some conditions, and the natural fractures being stimulated as well. This research can help illustrate the impact of reservoir thermodynamics on the oil recovery potential from unconventional shale reservoirs during cyclic CO2 injection.
- North America > United States > North Dakota (0.69)
- North America > United States > Montana (0.69)
- Research Report > Experimental Study (0.50)
- Research Report > New Finding (0.41)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock > Shale (1.00)
- Geology > Geological Subdiscipline (1.00)
- North America > United States > Texas > West Gulf Coast Tertiary Basin > Eagle Ford Shale Formation (0.99)
- North America > United States > Texas > Sabinas - Rio Grande Basin > Eagle Ford Shale Formation (0.99)
- North America > United States > Texas > Maverick Basin > Eagle Ford Shale Formation (0.99)
- (5 more...)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Shale oil (1.00)
- Reservoir Description and Dynamics > Unconventional and Complex Reservoirs > Shale gas (1.00)
- Reservoir Description and Dynamics > Storage Reservoir Engineering > CO2 capture and sequestration (1.00)
- Reservoir Description and Dynamics > Improved and Enhanced Recovery > Chemical flooding methods (1.00)