The figure below shows close-up views of two sand deposits that have differing degrees of cementation.Which explanation about how increased cementation of the clasts would affect the ability of oil to flow to a well does NOT make sense?
A) It would slow down the flow of oil to the well because the passages are on average less connected.
B) It would slow down the flow of oil to the well because the passages are on average narrower.
C) It would have no effect if there are sufficient, interconnected fractures in the rock (though not visible in the figures).
D) It would speed up the flow of oil to the well because flow through narrower passages will generate more friction and thereby heat the oil and decrease its viscosity.

Question

The figure below shows close-up views of two sand deposits that have differing degrees of cementation.Which explanation about how increased cementation of the clasts would affect the ability of oil to flow to a well does NOT make sense? 
A) It would slow down the flow of oil to the well because the passages are on average less connected. 
B) It would slow down the flow of oil to the well because the passages are on average narrower. 
C) It would have no effect if there are sufficient, interconnected fractures in the rock (though not visible in the figures). 
D) It would speed up the flow of oil to the well because flow through narrower passages will generate more friction and thereby heat the oil and decrease its viscosity.

Quizplus · Accepted Answer

Increased cementation would narrow the passages for oil flow, increasing friction and generating more heat, which would decrease the viscosity of the oil and speed up its flow towards the well.

The Figure Below Shows Close-Up Views of Two Sand Deposits