...). LSSVM exhibits good predictability to forecast the production such as oil recovery, gas recovery as surrogate models. The developed models can be used with high accuracy to forecast the production of oil from ultra-low permeability reservoirs. Quick sensitivity analysis of oil recovery to any parameter...

... connate saturation, etc. and is durable during the production years. In the surfactant treatment cases, an increase of oil recovery by 1%-3% is observed compared with the primary depletion. However, the optimized huff-n-puff process can achieve up to 8% more oil recovery than primary depletion. In terms...

... Abstract Surfactant imbibition is a new method to improve the oil recovery from tight rocks. The idea of this method is to introduce diluted surfactant solution (0.1-0.25% in active concentration) to stimulate the oil recovery from low or ultra-low permeability formations. The loss...

... Abstract This work is a novel attempt to analyze rock/brine and oil/brine interactions in heterogeneous unconventional liquid reservoir rocks and the effect of these interactions on oil recovery. There is very limited literature on the impact of brine salinity on shale wettability alteration...

... Abstract CO 2 flooding is a promising technique for improving oil recovery in tight oil reservoirs. Because of existence of nanoscale pores in tight oil reservoirs, which can affect phase equilibrium, there will be some variations between CO 2 immiscible and miscible processes in conventional...

... Abstract Unconventional formations such as the Eagle Ford, Niobrara and Bakken have made a significant impact on the oil industry over the last decade, but primary recovery factors are still low, typically less than 10%. The need for improved oil recovery (IOR) has been documented, but most...

... be beneficial to the initial oil recovery when the well is put back on production after the fracturing treatment. Considering the high chemical costs and low oil prices, maximizing the utilization of surfactants placed in hydraulic fracturing fluids can be an economical solution. Due to the unique...

... Abstract When the oil price is low, it is essential to optimize an EOR process in low-permeability reservoir, especially in unconventional shale oil reservoirs. Gas huff-n-puff, has shown to be an effective EOR method. This paper is to optimize this process to enhance oil recovery in shale oil...

... is not a necessary condition for enhancing oil recovery. The limit of capillary number theory has been discussed in ASP flooding. The mechanism of ASP flooding has been recognized again. upstream oil & gas displacement efficiency oil recovery viscoelasticity ultra low interfacial tension natural core...

... injection. In any case, project economics are adversely affected if optimum injection rates cannot be maintained. In addition to an overall loss in injectivity, clays tend to exacerbate heterogeneity, resulting in lower ultimate oil recovery. This happens for two reasons. First, clays have a stronger effect...

... Abstract Polymer gel treatments are effective in reducing high water production, resulting in improved oil recovery. The gels function by moving into highly permeable, water saturated zones and severely reducing permeability to water in those zones, so that oil can be produced from tighter rock...

... with KOH injected 556,000 BBLS/porosity-foot more water than the wells treated with cationic polymer, in 1.4 years less time. Following KOH, all injection wells were put on a low concentration of imbibition agent to maximize in-depth penetration of water into low permeable rock. Cumulative oil recovery...

... Abstract This paper discusses the reduction of heavy oil viscosity by carbon dioxide injection for improved oil recovery (IOR). Carbon dioxide injection is recognized as a viable injection gas for reservoir stimulation in light oil (30° API or higher) reservoirs. Carbon dioxide is also...

... an estimate of the potential of the ASP process to add reserves in other Minnelusa fields. Analysis of approximately 120 Minnelusa oil fields in the Powder River Basin indicates that the total original stock tank oil in place exceeds one billion barrels. The potential incremental oil recovery of the ASP...

... unaffected by the fluids injected into the extremely high permeability fractures. These fractures are multi-leveled and range from large scale macro-to small scale micro-fractures. The effects that the presence of fractures on oil recovery due to water imbibition was studied. Both unadulterated...

... ABSTRACT The feasibility of tertiary oil recovery by CO 2 injection in fields located in the Powder River Basin of Wyoming was studied. The objectives were 1) to estimate the amount of tertiary oil that could be recovered by CO 2 injection in the Powder River Basin of Wyoming; 2) to locate...

... demonstrates (1) how hydrocarbon recovery from a relatively small oil reservoir can be significantly increased with miscible gas injection and (2) how early reservoir characterization prevented production below the bubble point pressure, which would have eliminated the chance for the additional oil recovery...

... oil recovery. hydrocarbon remediation of hydrates paraffin remediation hydrate remediation microbial enhancement viscosity asphaltene inhibition enhanced recovery operation wax inhibition asphaltene remediation pvt measurement production monitoring gas production incremental...

... conditions (500 psig and 78 °F). Process performance was maximized at moderate injection rates. Oil recovery efficiencies and gas utilization factors were poorer at very high or low injection rates. The inclination of the core and the site of injection substantially influenced oil recovery efficiencies...

... ABSTRACT Since the early 1970s, numerous presentations have been made and articles written about pilot tests and field-scale enhanced oil recovery projects using carbon dioxide (CO 2 ) as a solvent. This paper summarizes publicly available data on 30 projects. The use of CO 2 has grown...