20240529-Afternoon

Select the name of "A" shown in the figure.

• Perforator

• Packer

• Tubing pipe

• Perforation

Select the name of "E" shown in the figure.

• Santa Claus

• Christmas tree

• Reindeer's antler

• Kadomatsu

What force does the Submersible pump use to raise the fluid to ground?

• Frictional force

• Buoyant force

• Tensile force

• Centrifugal force

What property of the fluid is improved in the Gas lift?

• Specific gravity

• Viscosity

• Temperature

• Interfacial tension

What percentage of oil in the reservoir can be recovered by primary and secondary recovery?

• < 10 %

• 10～30 %

• 30～50 %

• > 50 %

Select an answer that is not a reason why oil cannot be recovered completely.

• Difference between oil viscosityand water viscosity

• Difference between oil density andwater density

• Permeability difference betweenlayers

• Difference between oil reservoir temperature and surface temperature

What is it called the phenomenon of water injected into an oil reservoir flowing heterogeniously as shown in the figure?

• Fingering phenomenon

• Octopus phenomenon

• Squid phenomenon

• Centipede phenomenon

Select an effective method to improve the sweep efficiency.

• Decreasing interfacial tension between oil and water

• Increasing water viscosity

• Improving wettability of rocksurface

• Decreasing capillary pressure

What can be mainly improved with the thermal EOR?

• Interfacial tension between oil and water

• Reservoir pressure

• Oil viscosity

• Water viscosity

Select an EOR effect that cannot be brought by CO2.

• Oil viscosity reduction

• Oil swelling

• Increase in water viscosity

• Boundary between oil and CO2 can be disappeared