# Petroleum Production Operations Questions and Answers – Fluid Flow in the Reservoir

This set of Petroleum Production Operations Multiple Choice Questions & Answers (MCQs) focuses on “Fluid Flow in the Reservoir”.

1. Which of the following is correct for the pressure distribution near the wellbore for radial flow?
a)
b)
c)
d)

Explanation: Radial flow is the type of flow when the fluid flows from all directions towards the wellbore. Most of the pressure drop takes place near the wellbore. Fluid velocities increase tremendously near the wellbore so this rise in velocity takes place for the cost of pressure drop.

2. Flow efficiency is given by Jideal / Jactual (All signs have their original meaning).
a) True
b) False

Explanation: Flow efficiency is given by Jactual/Jideal. Whereas, Damage ratio is given by the formula Jideal / Jactual . These terms are used to quantify formation damage. Formation damage is the damage near the wellbore region because of which the production declines or a positive skin is generated.

3. Productivity Index is the measure of the performance of the well.
a) True
b) False

Explanation: Productivity Index is given by the formula Total fluid Flow rate/(Pressure drawdown) i.e. Q/(PR– Pwf). Where PR is the average reservoir pressure and Pwf is the bottom hole flowing pressure.

4. Fluid from a well was not able to move to the surface facilities due to less reservoir pressure. So a Gas lift valve is installed in that well. Now the well is producing well maintaining a good production rate. What’s the use of the Artificial Lift technique?
a) To increase the reservoir pressure
b) To lower the reservoir pressure
c) To lower the bottom hole flowing pressure
d) To increase the bottom hole flowing pressure

Explanation: The reason for the use of the Artificial Lift technique is to lower the bottom hole flowing pressure and create more pressure difference between the reservoir pressure and bottom hole flowing pressure so that fluid can move from bottom to surface facilities easily.

5. What is the full form of PCP in the petroleum industry?
a) Progressive Cavity Pump
b) Progressive Circulation Pump
c) Pressure Cavity Pump
d) Plunger Circulating Pump

Explanation: The full form of PCP in the petroleum industry is the Progressive Cavity Pump. It is a type of Artificial Lift Technique. PCP is a positive displacement pump that is used to lift heavy oil, sand, gassy wells, directional and horizontal wells.
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6. When the reservoir fluid flows from source rock to the reservoir rock then what is the name of this type of migration?
a) Primary
b) Secondary
c) Tertiary
d) Absolute Open Flow

Explanation: When the reservoir fluid flows from source rock to the reservoir rock then this type of migration is known as Primary migration and when the fluid moves inside the same reservoir then it is called Secondary migration. Absolute Open Flow is the rate at which a well will produce when the bottom hole flowing pressure is zero (or zero sand back pressure) but practically it is impossible.

Sanfoundry Global Education & Learning Series – Petroleum Production Operations.