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Questions and Answers
What does Capillary number (Nc) represent in the context of displacement theory?
What does Capillary number (Nc) represent in the context of displacement theory?
- Ratio of interfacial tension to viscosity
- Ratio of viscous forces to capillary forces (correct)
- Ratio of velocity to interfacial tension
- Ratio of pressure gradient to interfacial tension
How can Sor (residual oil saturation) in a reservoir be reduced according to the text?
How can Sor (residual oil saturation) in a reservoir be reduced according to the text?
- Using surfactants to lower interfacial tension (correct)
- Decreasing viscosity of the displacing fluid
- Increasing interfacial tension with miscible gas injection
- Reducing pressure gradient with viscous polymer injection
What do viscous forces in the context of displacement theory arise from?
What do viscous forces in the context of displacement theory arise from?
- Pressure drop per unit length
- External friction with capillary forces
- Interfacial tension with solid surfaces
- Internal friction among moving fluid molecules (correct)
What does the wettability of a surface affect according to the text?
What does the wettability of a surface affect according to the text?
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What is the typical range of Capillary Number (Nc) for waterflooding as per the text?
What is the typical range of Capillary Number (Nc) for waterflooding as per the text?
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How can Displacement Efficiency (ED) be calculated using the information from Relative Permeability functions?
How can Displacement Efficiency (ED) be calculated using the information from Relative Permeability functions?
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What methods can be used to overcome strong capillary pressure in a reservoir according to the text?
What methods can be used to overcome strong capillary pressure in a reservoir according to the text?
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