.... The similarity between injection (to store) and production (to extract) of hydrogen into and from the subsurface is how we define flow reversibility in this work. First, we identify possible sources of irreversibility from the general fractional flow equations because these express how much of the injected...

... imbibition is different during different EOR techniques, such as surfactant flooding, low salinity water injection, and hybrid methods. The effect of the type of capillary modifications on the imbibition rate was studied in this work. This study delves into a series of spontaneous imbibition tests aimed...

.... The polymer-containing solution was injected into the SEC columns and separated from the smaller impurities. The eluted fractions from the SEC column were directed to the RI detector measuring changes in refractive index as molecules pass through. RID signal was converted into polymer concentration using...

... showed that incremental oil recovery increases with higher slug size and higher polymer buffer concentration. The ASP injection comprises of 14 inverted 5 spot patterns. The surfactant induced tough emulsion formation is also proactively addressed in the upcoming ASP project. Although ASP process...

...). Recent studies have brought attention to PEO's improved injectivity in low permeability carbonate reservoirs compared to acrylamide-based polymers offering a promising alternative ( Mejia et al., 2022 a; Mejia et al., 2022b ; Trine et al., 2022 ). Five two-phase experiments were conducted in Indiana...

... geology salt tectonics enhanced recovery sedimentary rock carbonate rock mineral peg-h geologist waterflooding surfactant molecule figure 7 injection interaction synthetic seawater permeability wettability alteration reduction oil recovery journal rock type reservoir characterization...

... before treatment. 95% of the injected surfactant remained adsorbed within the reservoir leading to improvements persisting with a continued recovery uplift extending beyond two years and incremental recoveries ranging from 2,200 to 4,000 barrels of oil. The implementation of a polylactic acid (PLA...

... Abstract For a successful polymer EOR application, maintaining high polymer injectivity below fracture pressure is important to prevent fracture propagation in the reservoir causing fast breakthrough. Adding surfactant into the polymer system can facilitate the reduction of interfacial tension...

... Abstract The primary goal of this project was to prove the feasibility of a Cyclic Gas Injection/Production (Huff & Puff) enhanced oil recovery (EOR) scheme and evaluate its economic viability in the Viking formation in Saskatchewan, Canada. Historically, the Viking formation has...

... the advantages of alkali flooding and surfactant injection. This synergy addresses the paradox in the alkali flooding approach: while the introduction of alkali agents leads to the formation of petroleum soaps that can be mobilized in the reservoir, these soaps inherently display hydrophobic behaviour...

... /PVEE, and 10% for CO 2 /P-1-D scenarios in comparison with pure carbon dioxide injection. Moreover, the 26.5% additional oil was recovered during miscible CO 2 /PDMS injection in comparison with miscible pure CO 2 scenario. Therefore, the small molecule CO 2 -soluble polymers containing functional...

.... The comprehensive field scale sensitivity study indicates an additional oil recovery factor (RF) between 11-18% from LTG injection, influenced primarily by residual oil saturation to waterflood, injection rate, LTG slug size, and surfactant concentration. Gravity segregation between gas and microemulsion phases...

.... A sensitivity analysis was conducted to determine the most impactful parameters among recycled and purchased CO 2 , Water-Alternating-Gas (WAG) cycle and ratio, Tubing Head Pressure (THP) of injectors and producers, separator pressure and gas compressor injection rate. A Radial Basis Function Neural Network...

... compared to waterflooding. However, injecting a viscous polymer solution can reduce injectivity over time due to presence of near wellbore residual oil. The objective of this study is to identify promising surfactant formulations and test them in porous media to solubilize near wellbore oil to enhance...

... Abstract Polymer injection is a technique that has been applied worldwide to improve oil reservoir volumetric sweep efficiency and increase the recovery factor. Different applications using partially hydrolyzed polyacrylamide (HPAM) polymers have been carried out in some Colombian fields since...

... Abstract Low salinity water (LSW) enhanced oil recovery (EOR) has gained more attention in carbonate reservoirs with a variety of mechanism hypotheses. Recent research focused on fluid-fluid interaction (FFI) during LSW injection, especially forming water micro-dispersion (MD) as a potential...

... Abstract Clay particles can irreversibly adsorb polymers, limiting the availability of flowing polymers to sweep the reservoir. The adsorption in the near wellbore region can also lead to reduced injectivity. This study investigates the potential of sacrificial agents, specifically sodium...

... Abstract Tracer testing is the effective method to characterize subsurface, especially to investigate well connectivity or fluid pathways, estimate traveling velocity of injected fluid, assess the breakthrough times of the tracers between injectors and producers, and evaluate swept pore volume...

... storage co 2 thermal method brine oil recovery injection nacl brine wettability alteration nb dispersion rf bt saturation mpa accumulator Introduction Carbonated water injection (CWI) has been studied as CO 2 -augmented waterflooding, in which the injection brine is partially or fully...

... Abstract Conformance challenges occur in secondary or tertiary processes when the injected drive-fluid (water or gas) prematurely breaks through in one or more producers. In reservoirs considering significant variation in permeability within the oil-bearing rock, injection drive fluids...