... are corefloods designed to recover oil using SP and ASP formulations with anionic surfactants. Abstract Alkaline-surfactant-polymer (ASP) coreflood experiments using Indiana limestone were conducted to test the effectiveness of sodium hydroxide in reducing surfactant retention on limestones. Low...

... in porous media is critical to their application. This paper presents the results of a study on the adsorption and transport behavior of nanosilica particles in three different porous media: sandstone, limestone, and dolomite. The results revealed that the equilibrium adsorption of the particles...

...Reservoir Management and Operations Challenges Both earth model building and material balance estimates were carried out to understand the field overall pressure distribution and communication between the two regions. The distribution of the dolomite and limestone formations is found...

... laboratory experiments using foam to reduce fracture transmissivity and improve the matrix sweep in highly fractured, low permeable, oil-wet limestone are reported. Oil recovery either by individual water-, surfactant-, or gas injection exhibited low recovery, less than 10%OIP, with oil recovered...

... concerning the optimum brine salinity for injection wells. The results of this study give a new insight on the optimum salinity and provide better understanding of some wettability challenges in carbonate reservoirs. crude oil limestone reservoir core plug wettability concentration experiment...

... polymer solution application fractured core enhanced recovery Fluid Dynamics microgel experiment limestone fractured reservoir viscosity polymer microgel fracture permeability Introduction There are large reserves of mobile oil in reservoirs around the world that cannot be produced due...

... of residual oil saturation were clarified experimentally. Cylindrical Berea sandstone and Indiana limestone samples with different shape factors were obtained by cutting the plugs 1, 2.5, and 5 cm in diameter and 2.5, 5, and 10 cm in length. All sides were coated with epoxy except one end. Static imbibition...

... Abstract It is generally assumed that limestone reservoir rocks will react much more rapidly with acid than dolomite reservoir rocks. This work is the first to show this assumption to be false in some cases, due to mineral impurities commonly found in these rocks. Trace amounts of clay...

... recovery non-darcy flow parameter upstream oil & gas thermal equilibrium modification flow in porous media co 2 experiment grigg flow behavior north america government coefficient comparison spe 89471 co2 il301 non-darcy flow limestone flooding experiment united states government...

... limestone) were performed with a range of fluids under different conditions to identify the factors influencing the residual wetting and non-wetting phase saturations and oil recovery. Results of the tests conducted with Prudhoe Bay and Moutray crude oil show that remaining water (S wr ) and residual oil...

... for economic evaluation and to design an optimum surfactant injection scheme. Results show that lignosulfonate could reduce the adsorption of a primary foaming agent by 24–60% in Berea sandstone and 15–29% in Indiana limestone core samples. The selective adsorption behavior of lignosulfonate and surfactant...

... rocks should be considered when evaluating gel performance in the laboratory. The immense buffering capacity of limestone can effectively preclude the propagation of unbuffered Cr3+ (chloride)-xanthan getants or CrCl solutions through porous limestone. Introduction Ideally, gel treatments should...