... urea enhanced recovery gas injection method structural geology in-situ co 2 contact angle formulation experiment wettability alteration oil recovery contact angle measurement application oklahoma surfactant ift measurement Introduction The application of horizontal drilling...

.... The aqueous stable surfactants were tested for contact angles on the mineral surface. Seven surfactant candidates were selected for spontaneous imbibition experiments, where oil recovery was monitored as a function of time. Wettability-altering surfactants increase the oil recovery by spontaneous imbibition...

... saturation and connectivity which defines an important limit for the physical k r region. The change of this locus is also considered for two contact angles. PNM data further allows for the estimation of the relative permeability partial derivatives which are used as inputs in the EoS. Linear functions...

... main goal is to improve and validate a physically based model to predict contact angles from zeta-potential measurements. We propose a new mass-action formulation for surface complexation model (SCM) that includes the energy interaction effect between two close surfaces (PS). Currently, most SCMs...

... translated to other unconventional basins and gas condensate or wet/dry gas reservoirs. Upstream Oil & Gas Hirasaki unconventional resource enhanced recovery concentration surfactant Engineering Bakken oil pe injection chemical flooding methods Brine contact angle wettability alteration...

... imbibition saturation salinity Brine imbibition experiment contact angle surfactant chemical flooding methods Fluid Dynamics experiment evaluation optimal salinity reservoir lithology surfactant concentration permeability formulation interfacial tension Oil Recovery Introduction...

... for wettability alteration. Indeed, routine methods for assessing macro-wettability of fluids on rock surfaces (contact angle) include the sessile drop and captive bubble techniques. However, these two techniques can provide different contact angle depending on rock surface heterogeneities, roughness and drop...

... oil recovery. We measured various interrelated crude-oil( CO )/brine( W )/calcite( R ) interfaces, focusing on their physical and chemical – both static and dynamic – changes, such as contact angles, macro- to nano-scale surface topography ( e.g. , roughening, restructuring), and surface chemical...

... number of surfactants (anionic, non-ionic and cationic) and their blends were studied for aqueous stability, contact angle and spontaneous imbibition. Seven single surfactants and nine surfactant blends were found to be stable in both high and low salinity brines at 125 °C. All aqueous stable blends...

... has not been fully explored. This work was an attempt to conduct a systematic experimental study to improve our understanding of wettability of tight oil reservoirs and the mechanisms of its alteration on oil recovery improvement. Contact angles of individual rock-forming minerals and reservoir rock...

... has mixed mineralogy, with quartz, calcite, and dolomite acting as the major minerals in varying proportions depending on the interval depth. Contact angle and interfacial tension measurements were performed at reservoir temperature to identify the state of native wettability and the impact...

... caused by flow and takes advantage of contact angle hysteresis that occurs in porous media. It defines a critical oil ganglia length that depends inversely on capillary number and depends on porosity, permeability, and wettability. We have combined the critical oil ganglia expression and ganglia length...

... formation based on the contact angle in a preferentially oil-wet formation. We assume that interfacial tension (IFT) between oil/water and oil/gas remain unchanged in the presence of surfactants. In order to apply the effect of contact angle on multiphase fluid flow in porous media, existing relative...

... profile is then monitored as a function of time by means of a camera, which permits a simultaneous measurement of the interfacial tension between oil and water, contact angle between the water drop and the porous matrix and spontaneous imbibition. Various types of non-ionic and anionic surfactants...

... to the surface with strengths that are inversely proportional to the pore radius. In order to recover more oil from these pores, it is beneficial to reduce the capillary pressure by manipulating the interfacial tension and contact angle of oil/brine/shale systems using surfactant solutions. The main...

... how pH and ion content of the water phase as well as the presence of model polar components (fatty acids) in the oil phase affect the wettability (i.e. contact angle distribution) of oil-water-rock systems. Specifically, we discuss high resolution atomic force microscopy (AFM) experiments...

... from Marcellus shale slightly improved when using low or high pH solutions due to wettability alteration that has been supported by the changes in the measured contact angles before and after exposure to such solutions. The rock hardness of Marcellus samples was significantly affected by using both...

... dual-drop-dual-crystal contact angle measurements to characterize wettability changes and coreflood experiments for oil recovery and oil/water relative permeability measurements using a dolomite reservoir rock-fluids system. Additional experiments have been conducted to examine the roles of brine...

... in sandstone. We bring our "oil" close to the sand grain surface and measure the work of adhesion between the tip and the surface. Repeated "feeling" the surface with the tip produces data that can be converted to maps of adhesion and contact angle. Adhesion work is proportional to wettability and is directly...

... correlations, such as those provided in Parker et al. (1987) , do not consider IFT parameters in the capillary function. Therefore, a J-function can be used to relate changes in both IFT and the contact angle as a result of LSWF. (3) P o = P g − P c g o ( S w , S o...