Choose the option that correctly orders the fluids from the one that sits at the bottom of a sandstone reservoir to the one that is closest to the low-porosity shale at the top of the reservoir.
A) oil, gas, water
B) gas, water, oil
C) water, gas, oil
D) gas, oil, water

Question

Quizplus · Accepted Answer

Water is denser than oil and gas, so it sits at the bottom of the reservoir. Gas has the lowest density, so it sits on top of the water. Oil has a higher density than gas but lower density than water, so it sits between the two. Therefore, the correct order from bottom to top is water, gas, and then oil.

Choose the Option That Correctly Orders the Fluids from the One