A) Primary recovery
B) Tertiary recovery
C) Quaternary recovery
D) Secondary recovery

A) 20% to 40%
B) 70% to 90%
C) 30% to 60% or more
D) 10% to 20%

A) It requires less energy than primary methods
B) It alters the physical or chemical properties of the oil
C) It uses only gravity to extract oil
D) It relies solely on surface pressure

A) CO2-EOR
B) Chemical EOR
C) Microbial EOR
D) Thermal EOR

A) Tertiary recovery
B) Primary recovery
C) Secondary recovery
D) Quaternary recovery

A) Gas-heavy reservoirs
B) Heavy oil reservoirs
C) Shallow water reservoirs
D) Light oil reservoirs

A) They burn the oil in-situ
B) They increase the viscosity of the oil
C) They freeze the oil to make it solid
D) They reduce the surface tension of the oil

A) To push oil out of pores due to high viscosity
B) To chemically dissolve the rock formation
C) To generate heat through combustion
D) To lower the temperature of the reservoir

A) Removing water from the reservoir
B) Neutralizing CO2 emissions
C) Reducing oil viscosity
D) Increasing surface tension

A) The CO2 damages the wellbore equipment
B) The CO2 is too expensive to capture
C) The CO2 cannot be injected underground
D) The overall process might not be climate-beneficial

A) 1979
B) 2005
C) 1965
D) 1997

A) 30 to 60 percent
B) 10 percent
C) 5 percent
D) 20 to 40 percent

A) Steam and polymers
B) Hot air and chemical solvents
C) Water or gas
D) Micro-organisms and surfactants

A) In-situ burning of oil
B) Adding microbes to digest the oil
C) Using electricity to heat the reservoir
D) Injecting cold nitrogen gas

A) 20 billion barrels
B) 374 million barrels
C) 67 billion barrels
D) 100 billion barrels

A) Volcanic vents
B) Direct air capture units
C) Biomass gasification
D) Naturally occurring underground deposits

A) 32%
B) 12%
C) 44%
D) 9%

A) Removing the interface
B) Creating a stronger interface
C) Stabilizing the interface
D) Expanding the interface

A) Nitrogen
B) Liquefied petroleum gas
C) Carbon dioxide
D) Natural gas

A) 1977
B) 1960
C) 1945
D) 1952

A) 1985
B) 1952
C) 1990
D) 1977

A) California
B) Scurry County, Texas
C) Permian basin, New Mexico
D) China

A) Northern Europe
B) Arctic regions
C) Permian basin region
D) The Gulf of Mexico

A) South Africa
B) Brazil
C) Australia
D) China

A) Hydrogen extraction
B) Carbon capture technology
C) Direct air scrubbing
D) Atmospheric filtering

A) Between 100 and 500 ft.
B) Exactly at 500 ft.
C) Deeper than 2,000 ft.
D) Shallower than 1,000 ft.

A) Between one-half and two-thirds.
B) Exactly ninety percent.
C) None of the CO2 returns.
D) Less than one-tenth.

A) Gas cycling
B) Combustion
C) Chemical flooding
D) Saline water injection

A) Since the 1920s
B) Since the 1940s
C) Since the 1960s
D) Since the 1980s

A) Steam flooding
B) Solar thermal injection
C) Chemical surfactant flooding
D) Combustion

A) Compressed air
B) Steam
C) Carbon dioxide
D) Saline solution

A) An immiscible fluid.
B) A highly reactive acid.
C) A supercritical state.
D) A solid state.