In a gulf coast well, the speed of sound is 10,000 ft/sec at a depth of 13,500 ft. the normal speed of sound at this depth, based on extrapolated trends, would be 12,000 ft/sec. what is the pore pressure at this depth?

0.69 psi/ft  

Explanation:

speed of sound at depth of 13500 ft = 10000 ft/sec

normal speed of sound at 13500 ft = 12000 ft/sec

time taken to travel at 10000 ft/s (t) =

time taken to travel at 12000 ft/s(t n) =

assume overburden stress gradient = S/D = 1 psi/ft

normal pore pressure gradient = = 0.465 psi/ft

using imperical formula

                =

                = 0.69 psi/ft  

Pore pressure =  0.69 psi/ft  

answer:

d. attempt to find the owner, then leave your information if you cannot find them.

explanation:

d. represents both (b) and (c).

more logical as well.

b and c are to complicated.

glad i could , give me a follow, so if you need with any other question, im here.