Question

The technique(s) that are used to extract the oil from the rocks are

• A. Using surfactants
• B. CO${}_2$ injection
• C. CO injection
• D. Using microbes

Answer 1

Answer: (A), (B), (D)

Using microbes

Surfactants are the chemicals that are injected into the reservoir to act as detergents and extract the oil.Carbon dioxide combines with remnant oil, breaks it away from rock pores and pushes it to the production well. Some microbes can feed on nutrients in the reservoir and release gas as a part their digestive process this gas collects in the reservoir and build pressure that can force oil droplets out of the rocks pores.