The University of Texas at Austin

Transient Foaming Behavior of CO2-soluble, Viscoelastic Surfactant in Microfluidic Model, Sand Pack and Limestone Core

Ramadhan G., P. Nguyen Q., The University of Texas at Austin, US

Aqueous foam has been demonstrated through laboratory and field experiments as an effective conformance control technique for gas enhanced oil recovery and carbon sequestration. The use of polymer as an additive to an aqueous foam [...]

Rheological Behavior of Novel Switchable Cationic Surfactant in High Salinity Carbonate Reservoirs

Gurusinghe N., Ramadan G., Liebum M., Nguyen Q.P., The University of Texas at Austin, US

The use of viscoelastic (VES) or polymer-like surfactant solutions are important in applications related to enhanced oil recovery and subsurface conformance control. VES resembles polymer where it acts as a mobility control agent to promote [...]

Rheological Characterization of a Novel Viscoelastic Surfactant for Subsurface Applications

Liebum M., Nguyen Q.P., The University of Texas at Austin, US

Viscoelastic solutions (VES) are used in many applications including oil and gas operations regarding reservoir stimulation and enhanced oil recovery to modify rheology properties in the subsurface. In general, the viscoelastic property of the surfactant [...]

Development of New Surfactants for CO2 Foam Enhanced Oil Recovery

Nguyen Q.P., Ren G., The University of Texas at Austin, US

Sweep efficiency in CO2 enhanced oil recovery processes are major problem owing to the unfavorable mobility of CO2. One method of controlling CO2 mobility is through the use of foam. CO2 foam in the past [...]

Adsorption of Functionalized Silica Nanoparticles on Swelling Clay Minerals

Pham H-T, Nguyen Q.P., The University of Texas at Austin, US

Successful application of nanoparticles is dependent on understanding the mobility, retention, and transport fate of nanoparticles in natural formations. These aspects are greatly influenced by subsurface environmental conditions such as electrolyte type and concentration, temperature, [...]

Interaction of Surface Modified Silica Nanoparticles with Clay Minerals

Metin C.O., Nguyen Q.P., The University of Texas at Austin, US

The interaction of silica nanoparticles with montmorillonite clay was investigated by visual swelling tests, Fourier Transform Infrared (FTIR), and x-ray diffraction (XRD). The adsorption of silica nanoparticles onto montmorillonite was also studied with a UV-Vis [...]

Conformance Control through In-situ Gelation of Silica Nanoparticles

Rankin K.M., Nguyen Q.P., The University of Texas at Austin, US

Due to reservoir heterogeneities, oil recovery from fluid injection during secondary and/or tertiary recovery does not occur in an ideal piston-like displacement. Rather sweep efficiency can be much lower than 100% due to heterogeneities such [...]