scholarly journals Generalized entering coefficients: A criterion for foam stability against oil in porous media

1993 ◽  
Author(s):  
V. Bergeron ◽  
M.E. Fagan ◽  
C.J. Radke
Keyword(s):  
Porous Media ◽  
Foam Stability

Theoretical and experimental study of foam stability mechanism by nanoparticles: Interfacial, bulk, and porous media behavior

2020 ◽  
Vol 304 ◽  
pp. 112739 ◽  
Author(s):  
Muhammad Suleymani ◽  
Cyrus Ghotbi ◽  
Siavash Ashoori ◽  
Jamshid Moghadasi ◽  
Riyaz Kharrat
Keyword(s):  
Experimental Study ◽  
Porous Media ◽  
Foam Stability

Capturing the Dynamics of Foam Coarsening in a HPHT Microfluidic System

2021 ◽  
Author(s):  
Wei Yu ◽  
Xianmin Zhou ◽  
Mazen Yousef Kanj
Keyword(s):  
Porous Media ◽  
Pore Pressure ◽  
Foam Stability ◽  
Microfluidic System ◽  
Linear Increase ◽  
Gas Phases ◽  
Co2 Foam ◽  
Reservoir Conditions ◽  
Ultralow Interfacial Tension ◽  
Two Stages

Abstract The foam coarsening process is significant to foam stability in porous media. This study provides, for the first time, direct visualization of the foam coarsening process in porous media under realistic reservoir conditions. Foam coarsening behavior in porous media has shown a similar linear increase in the average bubble area to that in an open system but differs in two stages. The average bubble area increases with a faster rate in stage 1 and then increases with a slower rate in stage 2 and stage 2 dominates the foam coarsening process. The transition between the two stages occurs as the inner bubbles disappear when the edge bubbles start feeling the effects of the walls. The foam at steady-state shows a bimodal size distribution with bubbles trapped in the pore bodies and pore throats. The effects of pore pressure (600-3200 psi) and temperature (22-100 °C) were studied. Foam coarsening dynamics are sensitive to pore pressure and temperature, where higher pore pressure and lower temperature are more favorable to maintain a stable foam. Finally, the coarsening rates of foams generated with different gas phases were compared. In contrast to N2 foam and gas CO2 foam, supercritical CO2 foam exhibits the slowest coarsening rate because of its ultralow interfacial tension.

Stability and Flow Properties of Oil-Based Foam Generated by CO2

SPE Journal ◽  
2019 ◽  
Vol 25 (01) ◽  
pp. 416-431 ◽  
Author(s):  
Songyan Li ◽  
Qun Wang ◽  
Zhaomin Li
Keyword(s):  
Porous Media ◽  
Oil Recovery ◽  
Foam Stability ◽  
Mobility Control ◽  
Flow In Porous Media ◽  
Recovery Efficiency ◽  
Oil Viscosity ◽  
Aqueous Foam ◽  
The Stability ◽  
Foam Flooding

Summary Foam flooding is an important method used to protect oil reservoirs and increase oil production. However, the research on foam fluid is generally focused on aqueous foam, and there are a few studies on the stability mechanism of oil-based foam. In this paper, a compound surfactant consisting of Span® 20 and a fluorochemical surfactant is determined as the formula for oil-based foam. The foam volume and half-life in the bulk phase are measured to be 275 mL and 302 seconds, respectively, at room temperature and atmospheric pressure. The stability mechanism of oil-based foam is proposed by testing the interfacial tension (IFT) and interfacial viscoelasticity. The lowest IFT of 18.5 mN/m and the maximum viscoelasticity modulus of 16.8 mN/m appear at the concentration of 1.0 wt%, resulting in the most-stable oil-based foam. The effect of oil viscosity and temperature on the properties of oil-based foam is studied. The foam stability increases first and then decreases with the rising oil viscosity, and the stability decreases with rising temperature. The apparent viscosity of oil-based foam satisfies the power-law non-Newtonian properties, and this viscosity is much higher than that of the phases of oil and CO2. The flow of oil-based foam in porous media is studied through microscopic-visualization experiments. Bubble division, bubble merging, and bubble deformation occur during oil-based-foam flow in porous media. The oil-recovery efficiency of the oil-based-foam flooding is 78.3%, while the oil-recovery efficiency of CO2 flooding is only 28.2%. The oil recovery is enhanced because oil-based foam reduces CO2 mobility, inhibits gas channeling, and improves sweep efficiency. The results are meaningful for CO2 mobility control and for the application of foam flooding for enhanced oil recovery (EOR).

scholarly journals Foam Stability Influenced by Displaced Fluids and by Pore Size of Porous Media

2018 ◽  
Vol 58 (2) ◽  
pp. 1068-1074 ◽  
Author(s):  
Mohammad Javad Shojaei ◽  
Kofi Osei-Bonsu ◽  
Simon Richman ◽  
Paul Grassia ◽  
Nima Shokri
Keyword(s):  
Porous Media ◽  
Pore Size ◽  
Foam Stability

Investigation of Foam Stability in Porous Media at Elevated Temperatures

1988 ◽  
Vol 3 (02) ◽  
pp. 565-572 ◽  
Author(s):  
E. Eddy Isaacs ◽  
F. Clare McCarthy ◽  
J. Darol Maunder
Keyword(s):  
Porous Media ◽  
Elevated Temperatures ◽  
Foam Stability
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