An oil formation dips with a 10 o angle. Its permeability is 100md and its thickness is 40ft. Its oil density and viscosity are 40 Ibm/ft3 and 0.6cp, respectively. Two observation wells are drilled at Points 1 and 2. The two points are separated horizontally by 2000 ft. The figure shows the fall of the formation. The bottom of the observation well 1 is 8,152.6 ft below sea level and that of well 2 is 7,800 ft below sea level. The bottom pressures of well 1 is 3,600 psia and that of well 2 is 3,570 psia. Determine the fluid velocity between the two observation points.

Assume

(A)1D fluid single phase flow

(B) 2D fluid single phase flow

(C) 3D fluid single phase flow