... injection miscible method chemical flooding methods displacement viscosity permeability polymer flooding gravity segregation mbar Introduction CO 2 flow in porous media is vital for carbon utilization and underground storage, both of which contribute to the reduction of the atmospheric...

... Abstract Polymer flooding has been applied successfully in many water-wet, viscous oil reservoirs. When the reservoir is intermediate-wet or oil-wet, the polymer dosage has to increase to keep the displacement front stable, which adds to the cost. Alkali can generate in-situ soap, which lowers...

... on fully producing high-permeability layers. Water flooding - associated polymer flooding - microsphere flooding can increase oil recovery by 25.8% after water flooding. Calculate the DEF of 24 single-slug displacements, and draw a scatter diagram with the variation coefficient of the three layers’ oil...

... Abstract Application of polymer flooding in carbonate reservoirs still faces significant challenges, including polymer degradation, injectivity, and retention. With the increased awareness of the importance of water chemistry, this paper investigates the effect of make-up water composition...

... achieved success with waterflooding but currently, a continuous decline is observed. Polymer flooding is proposed as a solution in these cases. The pre-salt fields are still ramping up production at very high rates. Hence, as an alternative, in those reservoirs, CO 2 -WAG might be applied in the near...

... Table 1 Reservoir properties for ANS J-Pad polymer flood pilot Parameter Value API ° 15.4 Oil viscosity (cp) 332 Horizontal permeability (md) 500 – 5000 Porosity (%) 32 Reservoir depth (ft) 3600 Reservoir thickness (ft) 15 Initial reservoir pressure (psi...

... by adjusting the polymer concentration to the AP slug containing softened water. experiment injection waterflooding concentration enhanced recovery viscosity slug paper brine efficiency polymer flooding saturation upstream oil & gas chemical flooding methods polymer concentration...

... and then, it was reduced to 30% when polymer flooding was extended for 5 injected PVs. The RRF values were moderately low in both core samples (fractured and unfractured); however, a slight increase in RRF appeared in the fractured core sample due to polymer retention in matrix region. This investigation is one...

... Abstract Polymer flooding is one of the most commonly used chemical EOR methods. Conventionally, this technique was believed to improve macroscopic sweep efficiency by sweeping only bypassed oil. Nevertheless, recently it has been found that polymers exhibiting viscoelastic behavior...

... recovered as an oil bank. This paper is concerned with a simpler, lower-cost CEOR, in which a sole additive of surface active solvent (SAS) makes low-tension displacement fronts in polymer flooding (e.g., 10 −2 mN/m) without involving ultra-low IFT microemulsion phase behavior. The envisioned application...

... Abstract The first-ever polymer flood pilot to enhance heavy oil recovery on Alaska North Slope (ANS) is ongoing. After more than 2.5 years of polymer injection, significant benefit has been observed from the decrease in water cut from 65% to less than 15% in the project producers. The primary...

... chip oil recovery salinity emulsion droplet mobility control polymer flooding flooding experiment water flooding Introduction Even though the energy transition to lower-carbon intensity will change the oil and gas industry in next few decades, the global energy demand is expected...

... Abstract Polymer flooding is well-established and effective independent technique for improving oil recovery. However, this method is not considered viable due to the limitations such as retention at the unfavorable conditions, weak stability in the presence of divalent ions, high cost and its...

... of a polymer-free bank. Thus, determining the retention is a key factor in evaluating the feasibility of polymer flooding. This work investigates a method to reduce polymer adsorption and improve the economics of polymer EOR. This is done through laboratory experiments and reservoir simulation...

... conventional EOR methods such as chemical flooding (polymer flooding and surfactant flooding) or miscible gas flooding to benefit from their synergies and to achieve higher oil recovery factor and project profit. This paper presents a study of Hybrid Low Salinity Chemical Flooding as a novel EOR approach...

... polymers in offshore environments. novel liquid polymer chemical flooding methods polymer Upstream Oil & Gas enhanced recovery static mixer hydration configuration friction factor viscosity polymer flooding liquid polymer single stage pressure drop Oil Recovery Symposium filtration...

... Abstract Experimental data in numerous publications show that viscoelastic polymers can significantly reduce residual oil saturation under favorable conditions. The effect of viscoelasticity is in addition to improved sweep efficiency of polymer flooding. The residual oil saturation decreases...

... Abstract Reservoirs facing challenges such as high oil viscosity and high heterogeneity benefit from polymer flooding by decreasing unfavorable mobility ratios or improving crossflow. Despite this diversity of needs, polymer floods are often designed around a single point viscosity value, which...

... necessary to reach this goal. This may lead to a poor economic performance. Moreover, decisions that require extra investments (for instance, the use of some enhanced recovery technique such as polymer flooding) should be evaluated and taken into account in the analysis, since there are differences...

...-linear core systems with no capillary trapping. enhanced recovery polymer waterflooding displacement recovery profile polymer flooding chemical flooding methods breakthrough recovery viscosity ratio Oil Recovery surfactant breakthrough recovery polymer injection Upstream Oil & Gas...