Multiple Choice
Enhanced oil recovery methods are necessary because
A) Drilling directly into an oil field is often not possible.
B) The presence of natural gas makes it impossible to pump liquid petroleum.
C) Only about one third of the liquid petroleum within a field can be recovered by initial pumping.
D) Increasingly, drilling directly into an oil field is being banned by law.
Correct Answer:

Verified
Correct Answer:
Verified
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