Pseudo-steady state (PSS) flow occurs during the
_ __time region when the outer boundaries of the reservoir are all no flow boundaries.
A) early B) late C) middle D) none

Which of the following condition signifies that the well is damaged?
Where, FE = Flow efficiency
A)FE more than one B)FE less than one C)FE equal to one D)None

Transmissibility of a formation is given by __
Where: K = Permeability of formation, h= formation thickness, U: fluid viscosity & p: fluid density.
A)Khp B)Kh/p C)Kh/U D)K/U

If the 2 faults were parallel, what would the log-log and derivative plots do?
A) linear flow ; 1/2 slope
B)bilinear flow ; 1/4 slope C)spherical flow ; -1/2 slope D) none of these

Which of the following well test method can be used to know the communication between two wells?
A)Falloff test
B)DST C)Interference test D)Step rate

Oil is producing at constant oil flow rate of 120 STB/day under a PSS flow. Pressure is declining at a constant rate of 0.04655 psi/hr.
h = 72 ft, = 25%, Bo = 1.3 bbl/STB, ct=25 x 10-6 psi-l. Drainage area will be_____acres
A) 40 B)44 C)45 D)80

An oil well of wellbore radius 0.5 ft is shown to develop a skin. The damaged zone radius is 2.25 ft. Permeability is 300 md and the permeability of the damaged zone is 100 md. The effective well bore radius (ft) is..