... sandstones are used for core flooding experiments, but neither is a good match to Marmul Al-Khlata reservoir rock. Berea is too low permeability, and Bentheim does not have enough clay minerals to critically test chemical consumption. Since one goal of this work it to determine the utility of ethanolamine...

... in the laboratory and in the field with good results. In core floods with live oil and reservoir core, oil saturation has been driven below 5% (S orc ) recovering more than 90% of the waterflood residual oil (S orw ). An ASP treatment, via a single well chemical tracer test, has yielded an S orc of 1% recovering...

... for alkaline floods with high acid containing oils as the petroleum soap/cosurfactant ratio is not correct. In this case the acid number is very low and the contribution of petroleum soaps to IFT is negligible. Core Flood Experiments Abstract A low complexity chemical flooding formulation has been...

... with salinity. These particles are stable at 60 °C for at least several months. Core flood results show that these small particles can be transported through fractures during high salinity brine injection and plug the fractures during low salinity brine injection. Then the injectant fluid flow is diverted...

... floods. Here we demonstrate that polymer flow in radial and linear models may be significantly different and discuss the concept in theoretical and experimental terms. Linear core floods using partially hydrolyzed polyacrylamides (HPAM) were performed at various rates to determine in-situ viscosity...

... with epoxy inside a vertical polycarbonate column. A schematic of the core flood apparatus is shown in Figure 2 . Residual oil is defined as "oil remaining behind in a thoroughly water-swept region of permeable medium" ( Lake, 1989 ). Based on this definition, residual oil includes: oil ganglia...

... recovery. In general, to obtain valid test results, such cores must be restored to reservoir conditions to ensure valid results from core floods. We have investigated methods suitable for removing these ferric ions and restoring the core to reservoir condition. The new restoration method described...

... adsorption is low and oil recovery in core floods is high. Static adsorption tests show that low surfactant adsorption is attained at pH > 9, a condition that ammonia satisfies at low solution concentration. It is expected that ammonia has a performance deficiency relative to sodium carbonate...

... produced in absence of formation damage. The data indicates that LSF causes a shift in wettability towards a more water-wet behavior, and results in a reduction of Sorw. Upscaling the core flood results to field scale indicated that incremental recoveries within the life time of the field could be 1.7...

... banks, and other flow heterogeneities. These effects are all quantifiable by NMR, allowing accurate monitoring of ROS. Here, consistent ROS values are obtained in the laboratory, in single-well pilots, and in single-well chemical-tracer (SWCT) tests. Laboratory core floods with nuclear magnetic...

... moderately reactive 1 co-solvent concentration upstream oil & gas correlation alkali 0 surfactant retention adsorption mobility ratio mg g-rock core flood molecular weight surfactant microemulsion viscosity retention oil recovery formulation Background The mechanism of surfactant...

... phase behavior experiments in order to obtain ultra-low IFT at optimum salinity with low microemulsion viscosities. The ASP formulation was successfully tested in reservoir core floods using both surrogate oil and live oil. Experimental and Procedure Surfactants and Materials TSP alkoxylates...

...Fluids Abstract During the last decades colloidal dispersion gels (CDG) have been applied as an EOR method, providing sweep improvement in reservoirs with unfavourable mobility ratio. Our core flood results also indicate an improved microscopic sweep or microscopic diversion by CDG...

... represent a breakthrough in reducing the cost of chemical flooding and thus its commercial potential in both sandstone and carbonate reservoirs. saturation crude concentration crude oil activity diagram salinity oil saturation core flood viscosity phase behavior viscous oil surfactant...

... chemicals and minimize the need for relatively expensive core flood tests. Microemulsion phase behavior testing was therefore conducted using various combinations of surfactants, co-solvents and alkalis with a particular crude oil and reservoir conditions of interest. Branched alcohol propoxy sulfates...

... recovery and low surfactant retention. enhanced recovery Phase Behavior salinity Upstream Oil & Gas viscosity solubilization ratio chemical flooding methods concentration experiment crude oil surfactant reservoir core flood microemulsion formulation sulfonate polymer optimum...

... Abstract In this paper effluent data from laboratory experiments are compared with analytical composition routes and profiles for three-phase partially miscible flow of three-component mixtures. Core flood experiments were run in vertical glass bead packs to achieve approximately one...

... for testing in the Department of Energy (DOE)/Gary Operating Company Micellar - Polymer demonstration project in the Bell Creek field, Montana. As part of the process selection algorithm, laboratory core flood process selection algorithm, laboratory core flood results were matched using a numerical...