... in polymer retention by 14% was obtained for cores with a more oil-wetting condition resulting in a retention level of about 25 µg/g-rock. This is because oil-wet cores have a larger and effective surface area covered by the oil film, leading to a lower surface area left for polymer adsorption as opposed...

... agent, polymeric surfactant (PolyS), was studied to solve the chromatographic separation. Properties were investigated under the reservoir conditions, including viscosity, interfacial activity, injectivity, adsorption, and core flooding. With the increase of the active functional group content...

... the greatest pressure decrease is seen, is the most prone to asphaltene adsorption and deposition. Thus, the goal of this study is to investigate how new sacrificial fluids might be used to reduce asphaltene adsorption and deposition around the wellbore. To prevent asphaltene from interacting with the rock...

... plugged the core plug with relatively high adsorption/retention. Adding the surfactant improved the migration and reduced adsorption of nanosheet in porous media. Micromodel displacement test showed that improved nanosheet system at low concentration of 50 mg/L increased oil production by more than 20...

... formulation recovers more than 85% of the remaining oil after waterflooding, while having relatively low adsorption values. The designed formulation was also found to be quite resilient to variations in divalent cations concentration, water-oil ratio and oil composition. It was noticed that rock facies...

... and resulting IFT changes Saponification process by the reaction of naphthenic acids of the crude oil with the injected alkali Adsorption of surfactant and polymer on the carbonate rocks as a function of pH and time The geochemistry of aqueous and oleic phase reactions Updating reservoir capillary...

... the adsorption of potential determining ions (PDIs) on the carbonate surface using an optimized in-house surface-complexation model 3) Adjusting the relative permeability parameters to history-match the experimental data using different analytical solution of water-flooding (with and without ionic adsorption...

.... This study analyzed the structural transformations and adsorption properties of Na-bentonite clay before and after chemical activation by sulfuric and hydrochloric acids. The untreated and treated clay samples have been used for adsorption of organic matter from high strength phosphoric acid...

... Upstream Oil & Gas drilling fluid chemistry drilling fluid formulation adsorption composition mineral mixed layer inhibitor illite dispersion result wellbore design interaction kaolinite wellbore integrity shale inhibitor shale sample polyamine solution Introduction Wellbore...

.... In this study and for the first time we will investigate the effect of CO 2 content (0 to 20 vol%) on the natural gas desorption from the tight sandstone rocks. Accurate desorption isotherm will be developed based on the rock type and gas composition. Adsorption/desorption experiments will be carried out...

.... In this paper, the novel anionic surfactant has been developed with good capabilities, including good wettability alteration performance, low adsorptions, wide adaptability, good heat resistant and salt tolerant abilities, and high oil displacement efficiencies. Above all, the field test results are good...

... oil estimates. Finally, we perform a single-phase displacement experiment to characterize the polymer in-situ rheology, injectivity, adsorption, and inaccessible pore-volume. The experiment consists of three phases (water/polymer/water) each ran until pressure stabilization and at four different...

... oil EACN. Numerous surfactants were screened based on three main criteria: solubility in the envisioned injection brine, ultra-low oil/water interfacial tension and chemical adsorption on reservoir rock. Different brine types were considered and the use of adsorption inhibitors was also investigated...

... process in the reservoir is one of the major concerns in determining the feasibility of a chemical flooding project. Many efforts have been made to reduce the surfactant adsorption in various scenarios to make the project economically successful. The addition of polymer in the chemical formulation...

... Abstract Permeability determination of organic-rich shales is still a major challenge. Uncertainty in this estimate involves several factors. Two significant ones are the occurrence of gas adsorption which can severely limit gas transport in the pores and understanding the physical chemistry...

... Abstract Wettability alteration has been proposed as an important Enhanced Oil Recovery (EOR) mechanism for nanoparticles suspension. For better understanding nanoparticles adsorption behavior inside core and its effect on wettability, a series of wettability measurement experiments for oil wet...

...) model compatible with the reactive model. The followed approach is shown to be usable for forecasting H 2 S production due to an aquathermolysis phenomenon during a steam injection process. enhanced recovery steam-assisted gravity drainage adsorption fluid modeling equation of state...

... did not consider the change in gas properties with pressure, and numerically modeled the sulfur deposition as a condensate in a gas condensate reservoir. In this paper will consider r the sulfur adsorption and the actual physical properties of the sulfur will be used in the developed model...

... Abstract Surfactant flooding processes become challenging in hard brines and/or at high temperatures. When hard brine is used as surfactant make-up brine (injection brine), chemical adsorption is high using conventional injection strategies. This makes the overall process performance limited...

... difference numerical model was formulated and implemented, using implicit pressure-explicit saturation (IMPES) and explicit calculations for polymer concentrations and adsorption effects. The implemented approach was used to study the performance of polymer-augmented waterflooding by varying relevant...