Which of the following statements related to the 'enriched gas drive' are CORRECT?
Show Hint
- The enriching components are transferred from the oil to the gas.
- The enriched gas drive is an example of immiscible enhanced oil recovery.
- A miscible zone is formed between the injected gas and the reservoir oil.
- In enriched gas drive, the viscous fingering results in poor sweep efficiency.
The Correct Option is C, D
Solution and Explanation
The injected gas mixes with the reservoir oil, reducing viscosity and improving mobility.
Option (A) is incorrect because enriching components typically move from the gas to the oil, not the other way around.
Option (B) is incorrect because enriched gas drive is a miscible EOR method, not immiscible.
Option (C) is correct because a miscible transition zone forms between injected gas and reservoir oil, allowing improved displacement.
Option (D) is also correct since low gas viscosity causes viscous fingering, leading to poor sweep efficiency.
Thus, the correct statements are (C) and (D).
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