... & gas chemical flooding methods imqam unconventional shale reservoir shale core fakher society of petroleum engineers increase oil recovery injection pressure crude oil shale reservoir oil recovery experiment Carbon Dioxide Injection Pressure and Reservoir Temperature Impact on Oil...

... that at 0.01 Darcy intrinsic permeability of formation, a significant pressure delay is witnessed during CO 2 injection in hydrate formation. At 18 MPa injection pressure, the pressure hardly becomes stable during 4 weeks of hydrate growth process. Due to slow pressure distribution, it also affects temperature...

... Abstract The matrix permeability of the tight sandstone reservoir is very low, which causes difficulty to inject water, the CO 2 flooding is applied widely to these reservoirs for the better oil displacement and low injection pressure, but natural fractures develop as well as artificial...

... permeability was measured. Gelant was injected into the cores until the injection pressure stabilized. Breakthrough pressure was tested and followed by two WAG cycles injection. The injection pressure was monitored. Different permeability cores (100- 1200 md) were used to mimic different reservoir conditions...

... injection, and oil and water production with decreased pressure gas injection. The injection pressure needed to be periodically decreased in order to ensure immiscibility of CO 2 flooding. In the GDWS-AGD, the produced water not only reduced water cut and coning, but also significantly reduced...

... water salinity. Permeability heterogeneity and injection pressure are considered as two variables to affect gas channeling characteristics. It is figured out that producing gas-oil ratio and components analysis of effluent could be used to judge gas channeling and timing to control CO 2 production...

..., the open and closure of the pre-existing natural fractures were well corresponding with the variation of CO2 injection pressure. Higher injection pressure can induce the re-open of the pre-existing natural fractures, and the CO2 flow pattern induced by the fracture network become less anisotropic...

... and validated by comparing the simulation results with experimental data. The sensitivity analysis was run on the validated model to examine the effects of different parameters including injection scheme (separate slugs of pure CO2/carbonated water and continuous carbonated waterflooding), injection pressure...