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Well Log Test by Tigers Flashcards | StudBud

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In an ideal NMR response, which of the following is not a pore type identified?

What is one of the main advantages of NMR porosity determination over traditional logging methods?

Well Log Test by Tigers

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Answers

1
What is one of the main advantages of NMR porosity determination over traditional logging methods?
It is independent of lithology
It is the cheapest logging method available
It directly measures permeability
It eliminates the need for core samples
2
In an ideal NMR response, which of the following is not a pore type identified?
Large pores containing hydrocarbons
Small pores filled with water
Fracture porosity
Clay bound water (CBW)
3
What does the period from T1 to T2 in NMR logging represent?
The duration of hydrocarbon production
The time required for drilling operations
The measurement of rock density
The relaxation time of water molecules returning to random orientation
4
What is the cause of the NMR response in rocks?
Electrical resistance of the rock matrix
Alignment of polar water molecules in a magnetic field and their relaxation
The presence of hydrocarbons in large pores
Radioactive decay of elements in the rock
5
Why should NMR-derived permeability curves be used with caution?
Because they are exact and do not require core calibration
Because they measure oil saturation precisely
Because they measure lithology directly
they are based on mathematical transforms, may not match core measurements