Displacement Efficiency for Oil Recovery

Displacement Efficiency for Secondary and Tertiary Oil Recovery

• Displacement efficiency includes microscopic and macroscopic displacement.
• Microscopic displacement efficiency involves the entrapment and mobilization of residual oil, influenced by the recovery mechanism.
• Trapping mechanism is influenced by the porous medium's pore structure, fluids/rock interactions related to wettability, and fluid/fluid interactions reflected by IFT.
• Trapping in a single capillary is known as the Jamin effect, which requires overcoming a static pressure difference to initiate flow.
• Trapping with fluid bypassing occurs due to channel geometry, where an oil drop can become trapped by the Jamin effect.
• The pore doublet model assumes oil is trapped when displacement proceeds faster in one pore than the other and assumes pores are water-wet with equal viscosities and densities of oil and water phases.
• EOR process efficiency includes displacement efficiency (microscopic) and volumetric efficiency (macroscopic), influenced by capillary forces, viscous forces, mobility ratio, and viscous gravity ratio.
• Capillary number is a method of correlating experimental data using dimensionless groupings of variables involving the ratio of viscous to capillary forces.
• Correlations of Nca/cosθ, Nca, and Nca(µw/µo)0.4 with residual oil saturation have been established.
• Wettability can affect relative permeability curves, and changing capillary or viscous forces can impact residual oil at the front and behind the front.
• Sweep efficiency is the volume of reservoir contacted by the injected fluid and the fraction of PV invaded by the injected fluid, influenced by properties of the injected and displaced fluids, geological characteristics of the reservoir rocks, and well pattern geometry.
• Volumetric displacement efficiency and material balance, as well as areal and vertical displacement efficiencies, are used to assess reservoir performance.

Displacement Efficiency for Secondary and Tertiary Oil Recovery

• Displacement efficiency includes microscopic and macroscopic displacement.
• Microscopic displacement efficiency involves the entrapment and mobilization of residual oil, influenced by the recovery mechanism.
• Trapping mechanism is influenced by the porous medium's pore structure, fluids/rock interactions related to wettability, and fluid/fluid interactions reflected by IFT.
• Trapping in a single capillary is known as the Jamin effect, which requires overcoming a static pressure difference to initiate flow.
• Trapping with fluid bypassing occurs due to channel geometry, where an oil drop can become trapped by the Jamin effect.
• The pore doublet model assumes oil is trapped when displacement proceeds faster in one pore than the other and assumes pores are water-wet with equal viscosities and densities of oil and water phases.
• EOR process efficiency includes displacement efficiency (microscopic) and volumetric efficiency (macroscopic), influenced by capillary forces, viscous forces, mobility ratio, and viscous gravity ratio.
• Capillary number is a method of correlating experimental data using dimensionless groupings of variables involving the ratio of viscous to capillary forces.
• Correlations of Nca/cosθ, Nca, and Nca(µw/µo)0.4 with residual oil saturation have been established.
• Wettability can affect relative permeability curves, and changing capillary or viscous forces can impact residual oil at the front and behind the front.
• Sweep efficiency is the volume of reservoir contacted by the injected fluid and the fraction of PV invaded by the injected fluid, influenced by properties of the injected and displaced fluids, geological characteristics of the reservoir rocks, and well pattern geometry.
• Volumetric displacement efficiency and material balance, as well as areal and vertical displacement efficiencies, are used to assess reservoir performance.

Displacement Efficiency for Secondary and Tertiary Oil Recovery

• Displacement efficiency includes microscopic and macroscopic displacement.
• Microscopic displacement efficiency involves the entrapment and mobilization of residual oil, influenced by the recovery mechanism.
• Trapping mechanism is influenced by the porous medium's pore structure, fluids/rock interactions related to wettability, and fluid/fluid interactions reflected by IFT.
• Trapping in a single capillary is known as the Jamin effect, which requires overcoming a static pressure difference to initiate flow.
• Trapping with fluid bypassing occurs due to channel geometry, where an oil drop can become trapped by the Jamin effect.
• The pore doublet model assumes oil is trapped when displacement proceeds faster in one pore than the other and assumes pores are water-wet with equal viscosities and densities of oil and water phases.
• EOR process efficiency includes displacement efficiency (microscopic) and volumetric efficiency (macroscopic), influenced by capillary forces, viscous forces, mobility ratio, and viscous gravity ratio.
• Capillary number is a method of correlating experimental data using dimensionless groupings of variables involving the ratio of viscous to capillary forces.
• Correlations of Nca/cosθ, Nca, and Nca(µw/µo)0.4 with residual oil saturation have been established.
• Wettability can affect relative permeability curves, and changing capillary or viscous forces can impact residual oil at the front and behind the front.
• Sweep efficiency is the volume of reservoir contacted by the injected fluid and the fraction of PV invaded by the injected fluid, influenced by properties of the injected and displaced fluids, geological characteristics of the reservoir rocks, and well pattern geometry.
• Volumetric displacement efficiency and material balance, as well as areal and vertical displacement efficiencies, are used to assess reservoir performance.