Which of the following statements regarding artificial gravel pack are correct?
A. It is required when the aquifer material is homogeneous with a uniformity coefficient (Cu) of less than 3 and an effective grain size (D10) of less than 0.25 mm
B. It stabilizes the aquifer tapped by the well
C. It provides a zone of high permeability surrounding the well screen
D. It decreases the well radius (known as ‘effective radius’ of the well) and well yield
E. The maximum grain size of a gravel pack should be less than 1 cm
Choose the correct answer from the options given below:
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An artificial gravel pack behaves like an extension of the well screen.
It increases the effective radius of the well, which lowers the intake velocity of the water, prevents sand pumping, and increases the overall well yield.