This set of Petroleum Production Operations Multiple Choice Questions & Answers (MCQs) focuses on “Prediction and Identification of Scale”.
1. The easiest method of physically detecting any type of scale in the wellbore is to run the caliper down the wellbore.
a) True
b) False
View Answer
Explanation: The statement is true. To detect any type of scale in the wellbore, a caliper is run down the wellbore to check whether there is any type of decrease in the inner diameter of the tubing in use.
2. Which of the following log is used to identify the Barium Sulfate scale?
a) Resistivity log
b) Gamma-ray log
c) Neutron log
d) Density log
View Answer
Explanation: Gamma-ray log interpretation has been used to indicate the barium sulfate scale because it can detect the naturally occurring radioactive radium i.e. Ra226 that precipitates as an insoluble sulfate with this scale.
3. The beginning of water production coinciding along with reduction in production of oil is a perfect sign of scale problems in a well.
a) True
b) False
View Answer
Explanation: The statement is true. The beginning of water production coinciding along with reduction in production of oil is a perfect sign of scale problems in a well under consideration in oil and gas industry.
4. When the well is put in a shut-in condition, then the pressure starts to ____
a) Build up
b) Build down
c) Decreases
d) Become zero
View Answer
Explanation: When the well is put in a shut-in condition, then the pressure starts to build up. And if the well is put in a shut-in condition for sufficient time then it will attain the reservoir pressure. That’s why we extrapolate the straight-line portion in Horner’s plot in DST to calculate the reservoir pressure.
5. If the correlation coefficient is less than 1 then it indicates then the data obtained from the flow meter is of _____
a) Bad Quality
b) Doesn’t depend on the correlation coefficient
c) Good quality
d) Medium Quality
View Answer
Explanation: If the correlation coefficient is less than 1 then it indicates then the data obtained from the flow meter is of Good quality. That is why the FRQT calibration plot is required for obtaining good quality data.
Sanfoundry Global Education & Learning Series – Petroleum Production Operations.
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