This set of Petroleum Production Operations Multiple Choice Questions & Answers (MCQs) focuses on “Potential Safety Hazards in Acidizing”.
1. In which of the following case, foamed acidizing is not preferred?
a) High permeability formation
b) Liquid sensitive rock
c) Carbonate formation
d) Liquid sensitive Carbonate formation
View Answer
Explanation: Foamed acidizing is not preferred when the formation has high permeability. The supportive factors at which the foamed acidizing is preferred are Liquid sensitive Carbonate formation having low permeability.
2. Hydrogen sulfide should be generated while the reaction between the acid and the formation takes place.
a) True
b) False
View Answer
Explanation: The statement is false. Hydrogen sulfide should not be generated while the reaction between the acid and the formation takes place. A higher concentration of H2S can paralyze the nerves in the respiratory system.
3. Which of the following is correct regarding Acetic anhydride?
a) Used in formulating HF
b) Used in formulating a base
c) Used in formulating acetic acid
d) Used in formulating CaCl2
View Answer
Explanation: Acetic anhydride is used in formulating acetic acid. It produces vapors which are very irritating. Direct contact with acetic anhydrite may cause severe burns. If dilute acid or water is added to acetic anhydrite then an explosion may occur.
4. Which of the following is correct regarding Ammonium bifluoride?
a) Used in formulating HF
b) Used in formulating a base
c) Used in formulating acetic acid
d) Used in formulating CaCl2
View Answer
Explanation: Ammonium bifluoride is used in formulating Hydrofluoric acid (HF). It is very irritating. This dust may cause severe burns if combined with moisture. The contact with the dust or active HF should be avoided as far as possible.
5. At low concentrations, H2S smells like rotten eggs.
a) True
b) False
View Answer
Explanation: The statement is true. At low concentrations, H2S smells like rotten eggs. High concentrations can olfactory the nerves and prevent detection by the smell of dangerous gas concentrations. It is a very dangerous gas.
Sanfoundry Global Education & Learning Series – Petroleum Production Operations.
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