... Abstract Long-distance propagation of foam is one key to deep gas mobility control for enhanced oil recovery and CO 2 sequestration. It depends on two processes: convection of bubbles and foam generation at the displacement front. Prior studies with N 2 foam show the existence of a critical...

... foam injection, alter the wettability of fracture surface towards weakly water-wet conditions to reduce the capillary threshold pressure for foam generation in matrix and create capillary contact between matrix blocks. The capillary connectivity transmits differential pressure across fractures...

... of foam generation through a variety of experimental evidence. We perform coreflood experiments involving simultaneous injection of gas and surfactant solution at field-like velocities into a model consolidated porous medium made of sintered glass. The core has a well-characterized, sharp permeability...

... experiment drive foam quality Upstream Oil & Gas pressure drop stability enhanced recovery concentration salinity Foam Generation Oil Recovery ct scan image water flooding pressure drop profile foam quality primary drainage injection society of petroleum engineers Introduction...

... injection foam quality Upstream Oil & Gas co 2 stability apparent viscosity foam chemical flooding methods viscosity experiment strong foam generation Foam Generation gradient Introduction N.N.N'-trimethyl-N'-tallow-1,3-diaminopropane (DTTM) is an amine-based surfactant. Each DTTM...

...-in-brine foam generation experiments in Boise sandstones with surface-treated silica nanoparticle in high-salinity conditions. All the experiments were conducted at the fixed CO2 volume fraction (g = 0.75) and fixed flow rate which changed in steps. We started at low flow rates, increased to a medium flow...

... CO 2 foam and foam performance under those conditions. The objective of this study was to understand the effect of brine salinity on nanoparticle-stabilized CO 2 foam generation, foam stability, and foam flow behavior in a porous medium. In this paper, the investigation of the effects of different...

... ), where the peak in pressure difference across the core takes place well after gas breakthrough, in violation of most local-equilibrium foam models. As the kinetics of foam generation are slowed in our model, the peak pressure gradient is reduced, but the timing of the peak remains at the time of gas...

... mobility is altered as a function of foam texture, among other variables, are presented and compared. It is generally understood that both the gas relative permeability and viscosity vary in the reduction of gas mobility through foam generation in porous media. However, as the two parameters appear...

... Foam generation and mobility measurement were conducted at a condition of 25°C and 1200 psig. A series of baseline experiments (base) were performed at various flow rates by simultaneously injecting CO 2 and brine, in absence of silica nanoparticles, into the glass bead pack and capillary tube...

... is presented, which is expected to reduce CO 2 mobility during CO 2 EOR. This paper also describes the factors of nanoparticle concentration, CO 2 /brine volumetric ratio, and total injection rate effects on dynamic CO 2 foam generation and foam mobility. Dynamic supercritical CO 2 foam was generated...

... of foam flooding in porous media. IFT lowering demonstrates the interfacial activity of a surfactant at the dense CO 2 /water interface. It may also favor foam generation at low velocities in porous media. However, other parameters such as the hydrophilic/CO 2 -philic balance of the surfactant...

... pressure drop application foam generation gas injection method concentration spe 152113 surfactant solution mobility control upstream oil & gas sandpack oil recovery symposium reservoir conditions compatibility foam gas mobility control Abstract Miscible gas flood in a CEPSA...

... for in-situ foam generation, and 2) pre-generated foam injection. In-situ foam generation in the smooth-walled fractures was weak and not sufficient to divert fluids from the fractures and into the matrix. Injection of stable, pre-generated foam caused an increase in the differential pressure and diverted...

... as it describes the bubble generation using mainly two parameters, the maximum bubble density and a foam generation constant. It is also robust because it grasps the essence of foam physics in homogeneous porous media. A good qualitatively agreement exists between the numerical predictions and the water...

... Abstract The generation of strong foam in homogeneous porous media has been reported to be a function of flow rate, pressure drop, permeability, and system length. This study seeks to explain foam generation in terms of dimensionless groups and establish the criteria for foam generation based...

... of magnitude in total mobility: i.e., "foam generation." Earlier research on foam generation is extended here with extensive data for a variety of porous media, permeabilities, gases (N 2 and CO 2 ), surfactants, and temperatures. For bead- and sandpacks, ∇p min scales like (1/k), where k is permeability...

.... In this definition, the term "surrounding medium" can be either one single composition or a multi-composition. As such, foams have been used in a number of roles according to their different fluid components. permeability variation coefficient fluid dynamics upstream oil & gas foam generation foam...

... oil tolerance of AOS/polymer foam was caused by the lower oil saturation in the core during foam generation. This hypothesis was tested by pre-flushing a core with the polymer/surfactant solution, but then generating gas-blocking foam from a polymer-free foamer solution. The resulting performance...

... Abstract Previous studies of foam generation and transport were conducted, mainly, in one-dimensional and homogeneous porous media. However, the field situation is primarily heterogeneous and multidimensional. To begin to bridge this gap, we have studied foam formation and propagation...