Secondary Recovery Process
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Match Column-I with Column-II and select the correct answer using the codes given below the columns.
Column-I Column-IIA.Coal gasP.(C2H6+C3H8+C4H10)B.Petroleum gasQ.(CH4+C2H6+C3H8+C4H10)C.Producer gasR.(H2+CH4+CO)D.Natural gasS.(CO+N2)
[C2H6−ethane, C3H8−propane, C4H10−butane]
A→R, B→P, C→S, D→Q
A→P, B→R, C→S, D→Q
A→Q, B→P, C→S, D→R
A→R, B→P, C→Q, D→S
Microbes are helpful in oil recovery because:
they act as surfactants.
they increase natural pressure.
they secrete oil.
they decrease natural pressure.
Which of the following is correct about microbes?
They are small living organisms just like bacteria.
They are chemical fertilizers and used as surfactant.
They are plants that grow inside oil reservoir.
Microbes cannot be used for processing food products.
Which of the following can be used as a method for secondary oil recovery?
1) Water flooding
2) Surfactants injection
3) CO2 injection
4) Microbial injection
1, 2, 3 and 4
2, 3 and 4
1 and 3
1 and 2