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(Solved): Q. 5 You are required to evaluate the core flow efficiency (CFE) expected after the perforation oper ...
Q. 5 You are required to evaluate the core flow efficiency (CFE) expected after the perforation operation, for this purpose the permeability of a 1.5 " in diameter and 2.90 " in length sandstone core sample obtained from the reservoir section was evaluated before and after the perforation operation maintain a back pressure of 600 psi and using a brine with a viscosity of 0.95 cP . The results of permeability measurement showed that after plotting the data of the flowrate vs pressure drop, the slop of the straight line obtained for the data of the permeability measurement before perforation was
0.0752c(m^(3))/(sec.atm)and that after the perforation was 0.0604
c(m^(3))/(sec.atm). What will be the CFE? Use the following formula to calculate the permeability:
K=(1000\times The slope (c(m^(3))/(_(sec.atm )))\times core length (cm)\times brine viscosity (cP))/( Cross sectional area of the core sample (cm^(2)))