... temperature conditions, where CO 2 remained in the supercritical state. The performance of the amphoteric surfactant was compared with another good foamer on the basis of foam stability and strength, both in bulk and in porous media. Dynamic adsorption tests were conducted to compare the adsorption...

... losses on reservoir minerals in the form of adsorption. Surfactant formulations designed in this work are unique and provide high temperature stability (above 70 °C and in some cases up to 120 °C) and high salinity tolerance (> 12 % TDS and up to 22% TDS in some low temperature cases). The field...

... reservoir characterization hydrate remediation production chemistry wax inhibition waterflooding asphaltene inhibition complex reservoir calcite surface calcite powder scale inhibition eqcro adsorption mineral surface carbonate hydrocarbon oilfield chemistry asphaltene remediation upstream...

... waterflooding surface facility concept upstream oil & gas modeling & simulation field development optimization and planning adsorption viscosity asp pilot implementation polymer flood facility concept sensitivity infill drilling surfactant adsorption consideration injection mangala field...

... of the viscous polymer front through the reservoir; the slower the polymer propagates, the longer before the impact on oil recovery is observed ( Chapman et al., 2015 ). While there exists a great deal of literature on the adsorption of polyacrylamide as it is injected, little is dedicated to the impact...

... Extensive laboratory design and testing were performed to reduce the risk of pilot test. Screening tests are described including interfacial tension, phase behavior, viscosity, adsorption, wettability and core floods. Abstract The first pilot test of surfactant-polymer (SP) flood...

... Abstract Phase equilibrium of shale fluid is highly disturbed due to liquid adsorption and capillary pressure in densely-developed organic nanopores. And the miscibility phenomenon between gas and oil is also changed during gas injection for enhanced oil recovery (EOR). Therefore...

... reservoir at ~100°C include those for phase behavior, interfacial tension, adsorption, and oil displacement from an oil-wet dolomite core in an Amott cell. The surfactant blend is dissolved in synthetic hard seawater, and simulated live oil is prepared by diluting dead crude oil with cyclohexane...

... adsorption experiment seawater formulation enhanced recovery Brine reservoir rock salinity apparent viscosity flood Table 1 shows chemical requirements in tons/day for a hypothetical 100,000 BBL/day ASP chemical flood. It is seen that the largest chemical requirement is for sodium carbonate...

... from laboratory testing, combined with reservoir-scale simulations and field trial surveillance, enabled the reaction and adsorption characteristics of the polymer to be estimated. Simulations of the injection pressure demonstrate that this polymer has significantly better injectivity under matrix...

... model parameters. The simulations also captured the transient increasing of the pressure drops induced by polymer transport and adsorption. The proposed model can be used to provide meaningful values of the model parameters that were able to explain the physical mechanisms behind the PEF floods...

... to transition between the different types. The effects of a separate microemulsion (ME) phase are accounted for. Temperature effects on surfactant phase behavior as well as on adsorption are also considered. Other important physical effects that are modeled include phase trapping and oil bypassed by surfactant...

... apparent viscosity and reduce steam channeling. Although the technology is promising, it is not always economically attractive due to the large volumes that must be injected continuously, high adsorption of surfactant on reservoir rocks, and limited thermal stability of the surfactant. The opportunity...

... enhanced recovery Brine Upstream Oil & Gas siderite concentration retention value chemical flooding methods hpam retention experiment degradation anaerobic condition polymer solution society of petroleum engineers retention sodium dithionite adsorption polymer retention...

... shale reservoir is so significant that its effect shall be considered to achieve a correct characterization of flow mechanisms in shales ( Nojabaei et al ., 2013 ). Once vapor-liquid equilibrium is established with consideraion of capillary pressure effect, an adsorption for the vapor phase...

... as a decisive factor. With the zwitterionic surfactant, the synergy effect was not as great as the cationic surfactant. The synergy was greater with the nonionic surfactant than the zwitterionic surfactant, implying that the surfactant adsorption at oil-brine interface can be increased by hydrogen bonding...

... Levitt et al. (2015) summarizes the classic 4 stages of surfactant adsorption described in the literature ( Somasundaran and Fuerstenau, 1966 ; Cases et al., 1982 ; Somasundaran and Zhang, 2006 ). For the case of the adsorption of an ionic surfactant on an oppositely-charged, highly-energetic...

... in a sand pack. The treatment was effective in altering the sand pack wettability from an oil-wet to a strongly water-wet condition. Franco et al.1 carried on an experimental study to analyze the effect of the chemical nature of twelve types of nanoparticles on asphaltenes adsorption, and the delay...

... equilibrium model (SLE) is used for describing the adsorption isotherms of asphaltenes on nanoparticles. Ozawa-Flynn-Wall method (OFW) is employed for estimating the effective activation energies and describing the kinetic mechanism of the catalytic steam gasification of asphaltenes. Solid-Liquid...

... to penetrate the formation. Literature precedent exists that polyelectrolyte (PET)-based SAs could significantly reduce surfactant adsorption not only onto a variety of outcrop minerals (Carlpool dolomite, calcite, kaolinite, Berea sandstone, Indiana limestone, etc.) and metal oxide nanoparticles, but also...