Because of the challenges associated with removing oil from the ground,
A)the first oil removed from a well is the most expensive to extract.
B)primary recovery of oil is more expensive than secondary recovery.
C)enhanced recovery of oil is more expensive than secondary recovery.
D)only about 60% of the oil in a well can be removed by just pumping.

Question

Quizplus · Accepted Answer

Enhanced recovery methods, which are used after primary and secondary recovery stages, involve more complex techniques such as injecting substances (e.g., water, gas, chemicals) to maintain pressure and improve oil flow. These methods are more expensive due to the additional processes and technologies involved.

Because of the Challenges Associated with Removing Oil from the Ground