26. What is the process of injecting water or steam into an oil reservoir to reduce the viscosity of the oil and enhance its recovery called?
a) Steam flooding
b) Water flooding
c) Fracking
d) Acidizing
27. Which country is the largest producer of natural gas in the world?
a) United States
b) Russia
c) Qatar
d) Iran
28. What is the process of converting natural gas into synthetic liquid fuels, such as diesel or gasoline, called?
a) Gasification
b) Reforming
c) Methanation
d) Fischer-Tropsch synthesis
29. Which gas is responsible for the characteristic odor of natural gas?
a) Oxygen
b) Carbon dioxide
c) Methane
d) Mercaptan
30. What is the term used to describe the total amount of oil or gas that can be technically and economically recovered from a reservoir?
a) Reservoir capacity
b) Ultimate recovery
c) Resource potential
d) Reservoir size
