Reservoir Petrophysics (PETE3101)
Petroleum Engineering - PET
Semester: First Semester
Level: 300
Year: 2018
School/Faculty: NAIHP1 DEPARTMENT/YEAR: PETE/Year 1 LECTURER(S): Dr. Fozao K
COURSE CODE: PETE 2204 COURSE TITLE: Reservoir Petrophysics COURSE CREDIT: 04
DATE: 02/08/2018 HALL: NAHP12 TIME: 2hr
Instructions:
Answers all
•
Questions
THE UNIVERSITY OF BAMENDA
P.O BOX 39 Bambili
REPUBLIC OF CAMEROON
Peace-Work-Fatherland
0 .
. 1 7 0
r.
1.
Describe a typical petroleum accumulation system. 15 Marks
2. A) Based on origin of porosity and nature of pores, give a classification of
porosity. 10 Marks
B) List five factors that will affect porosity. 5 Marks
3. What do you understand by Leverett J-function and how will you use it to
convert capillary pressure data generated in the laboratory conditions to the
reservoir condition capillary pressure? 10 Marks
4. a) A core sample of 1.25cm radius, 5cm long was used in an experiment for
permeability determination. The permeability was found to be 0.33x10
-i2
m
2
when brine
of viscosity 0.001Pa.s flew through it at a pressure differential of 0.2MPa. Determine
the flow rate in m
3
/s 5 Marks
b) flow rate, if instead of brine, oil of viscosity 0.003Pa.s was used, every
other parameter remaining the same as in 4a. 5 Marks
c) If this core sample weighs 0.0052kg when dry and 0.0106kg when fully
saturated with oil of specific gravity of 0.85, calculate the effective
porosity. 5 Marks
5. A) Oil of viscosity of O.O2Pa.s flows radially in a reservoir of thickness of 10.5m
and a permeability of 1.6x10
-13
m
2
from a drainage radius of 227m into a well of radius
of 0.1m. If the pressure difference between the outer flow boundary and the inner
flow boundary is 4x10
5
Pa, using Dupuit's equation, calculate the flow rate in this well
in ra
3
1day 5 Marks
B) Three beds of 50, 100 and 700md, and 5, 8 and 10ft thick, respectively are
conducting fluid in parallel flow. If all are of equal length and width, what is the
average permeability 5 Marks
C) Three other beds of equal cross sections have permeabilities of 150, 70, and
300md, and length of 40, 10, and 75ft respectively. What is the average permeability
of the beds placed in series? 5 Marks
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