Well Test Theory – are you ready ?
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So piece of cake ?
Otherwise time to relax, put your feet on your desk and watch a movie…
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Question 1 of 10
1. Question
Why do we use pseudo-pressure for gas wells in particular ?
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Question 2 of 10
2. Question
What about with depletion? Any issue for gas wells in particular, with significant changes in reservoir pressure?
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Question 3 of 10
3. Question
Are the drawdown and PBU responses equivalent ?
Correct
Yes it depends. Drawdown and PBU are equivalent under some assumptions.
Incorrect
The correct answer is that it depends. Drawdown and PBU are equivalent under some assumptions.
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Question 4 of 10
4. Question
What are the assumptions when analyzing a shut-in period ?
(multiple answers)
Correct
Well done.
(You could have had an extra point though, if you had also selected number 4…)
Incorrect
Strictly speaking, the first three answers are correct.
(If you selected number 4, you secretly got an extra point…)
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Question 5 of 10
5. Question
Why are we always talking about the superposition time?
Correct
It is not important to know the definition of the superposition time function, but why we use it.
Incorrect
It is not important to know the definition of the superposition time function, but why we use it.
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Question 6 of 10
6. Question
What could a negative slope on the derivative mean ?
(multiple answers)
Correct
Well done!
Incorrect
There are 3 possible answers to this question.
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Question 7 of 10
7. Question
Looking at the derivative plot below, what type of well and reservoir could that be ?
(multiple answers)
(click on the plot to enlarge)
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Question 8 of 10
8. Question
Do we derive pressure or ∆P to obtain the derivative plot ?
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It doesn’t matter whether we derive PBU pressure or ∆P, it is the same.
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Question 9 of 10
9. Question
Which tool do we generally use to drive our well test analysis?
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Question 10 of 10
10. Question
Ok a difficult one for the end. Looking at the plot below, what type of well and reservoir could that be?
(multiple answers)
(click on the plot to enlarge)
Correct
Incorrect
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