Problem 1:
Ignore water and rock compaction and determine the dominant production mechanism at
the second, forth and sixth years of the reservoir shown below. The original oil in place
was 67 MMSTB and the gas cap held 38 MMMSCF of gas at discovery.
Time
Problem 1:
Calculating the initial gas in place and initial reserve of a gas reservoir from pressure-production
data for a volumetric reservoir using the following data
pi = 3250 psi
T = 213o F
p sc = 15.025 psia
Tsc = 60 o F
G p = 1 10 9 SCF
p = 2864 psi
UNIVERSITY OF CALGARY
INRTODUCTION TO RESERVOIR ENGINEERING
ENPE 523 Spring 2010
Lab Problems #9
Problem 1:
Calculation to show the effect of the produced gas-oil ratio Rp on fractional recovery
in volumetric undersaturated oil reservoirs.
The PVT data ar
UNIVERSITY OF CALGARY
INRTODUCTION TO RESERVOIR ENGINEERING
ENPE 523 Spring 2010
Lab Problems #6
Problem 1
A gas well in an infinite reservoir was produced at constant rate of 7MMSCFD. Use the
following data and find well pressure after 36 hr of productio
1
Problem 1: Calculating a fractional flow curve
A linear portion of an oil reservoir is being subjected to a water flood. The water injection rate is
2830 bbl/day. Calculate the fractional flow curve for this reservoir corresponding to the following
rese
UNIVERSITY OF CALGARY
INRTODUCTION TO RESERVOIR ENGINEERING
ENPE 523 Fall 2009
Lab Problems #4
Problem 1: The discovery well in a reservoir is put on a DST and flows at a rate of 18
STBD, what will the well pressure be after 6 min of production if the res
UNIVERSITY OF CALGARY
INRTODUCTION TO RESERVOIR ENGINEERING
ENPE 523 Spring 2010
Lab Problems #5
Problem 1.
Calculating the water influx constant when reservoir pressure stabilizes.
Given:
Initial pressure = 2275 psig
Stabilized pressure =2090 psig
Total
Problem 1:
Calculate the contents of a 500 ft3 cylinder of ethane at 85.3 psig and 100 F
in moles, pounds, and SCF
SOLUTION:
Assuming ideal gas behavior
(
)
pV
(85.3 + 14.7)( psia ) 500 ft 3
=
= 8.32 lb moles
R' T
psia ft 3
10.732
(100 + 460 )(R )
lb mo
Problem 1:
Calculation of velocity and fluid flow direction between two wells.
Given:
Distance between wells = 1320 ft
Layer thickness= 20 ft
Dip of the layer = 8.37
Reservoir datum level = 7600 ft subsea
Reservoir fluid specific gravity = 0.693 (water =1
Problem 1: Calculate the pressure difference, i.e., capillary pressure, and capillary rise in
an oil-water system from the following data:
Step 1.
1 dyne/cm2=1.45105 psi
Pc=6.28 psi
This result indicates that the oil-phase pressure is 6.28 psi higher than
Andy Gee
ENPE 429 Assignment 2
Page 1 of 8
1.
a)
B o=
V o|p ,T
V o|SC
1 f t3
1 RB
28316.8 cc 5.615 f t 3
B o=
1 f t3
1 STB
207.5 cc
28316.8 cc 5.615 f t 3
290 cc
B o=1.397590 RB/STB
B o=1.40 RB/ STB
Rso=
Rso=
V gasdissolved liquid at SC
V liquid at SC
(
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 4: Material Balance for Oil Reservoirs
Problem 1
The following data are taken from an oil field that had no original gas cap and no water drive:
Oil pore vo
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 3: Material Balance for Gas Reservoirs
Problem 1:
The M sand is a small gas reservoir with an initial bottom-hole pressure of 3200 psia and bottomhole tempe
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 3: Material Balance for Gas Reservoirs
Problem 1:
The M sand is a small gas reservoir with an initial bottom-hole pressure of 3200 psia and
bottom-hole temp
hoUNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 6: Water Influx
Problems are from Examples of Applied Petroleum Reservoir Engineering by Craft and Hawkins
Problem 1
Calculate the water influx after 100,
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 2: Fluid properties
Problem 1:
Calculate the contents of a 500 ft3 cylinder of ethane at 85.3 psig and 100 F in moles and
pounds.
Solution:
Assuming ideal g
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 2: Fluid properties
Problem 1:
Calculate the contents of a 500 ft3 cylinder of ethane at 85.3 psig and 100 F in moles and
pounds.
Problem 2:
Three pounds of
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 1: Basic rock properties - Answers
Question 1
What are the porosities of (i) cubic and (ii) rhombohedral packing of equal-sized spheres ? Show
how you calcu
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 5: Single Phase Flows
Problem 1
An undersaturated water-drive reservoir has produced for several years without substantial change
in the reservoir pressure.
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 5: Single Phase Flows
Problem 1
An undersaturated water-drive reservoir has produced for several years without substantial change in the
reservoir pressure.
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 4: Material Balance for Oil Reservoirs
Problem 1
The following data are taken from an oil field that had no original gas cap and no water drive:
Oil pore vo
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 7: Basic rock-fluid properties
Problem 1:
A water-oil interface sits inside a perfectly circular pore of radius r=20 m as follows.
Water
Oil
2r
The contact
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Practical problems 1: Basic rock properties
Question 1
What are the porosities of cubic packing of equal-sized spheres? Show how you calculated these
values. How about if the
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016, Assignment no. 5
Assigned: Dec. 3, 2016 Due: Dec. 14, 2016
(Some problems are from Craft and Hawkins)
Problem 1
An oil reservoir is located between two intersecting faults as
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016, Assignment no. 5
Assigned: Dec. 3, 2016 Due: Dec. 14, 2016
(Some problems are from Craft and Hawkins)
Problem 1
An oil reservoir is located between two intersecting faults as
UNIVERSITY OF CALGARY
RESERVOIR ENGINEERING
ENPE 429, Fall 2016, Assignment no. 4
Assigned: Nov. 19, 2016 Due: Nov. 28, 2016
(Some problems are from Craft and Hawkins)
Problem 1:
A well was given a large fracture treatment, creating a fracture that extend
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2015
Assignment no. 1
Assigned: Sept. 21, 2016
Due: Oct. 3, 2016 (11 am)
Problem 1
a) Complete the following sentences using increase or decrease.
a.1. Porosity . as angularity of
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Assignment no. 3
Assigned: Oct. 24, 2016 Due: Nov. 4, 2016
Problem 1:
The following production data are available from a gas reservoir produced under volumetric
condition.
p (
UNIVERSITY OF CALGARY
RESERVOIR ENGINEERING
ENPE 429, Fall 2016, Assignment no. 4
Assigned: Nov. 19, 2016 Due: Nov. 28, 2016
(Some problems are from Craft and Hawkins)
Problem 1:
A well was given a large fracture treatment, creating a fracture that extend
UNIVERSITY OF CALGARY
INTRODUCTION TO RESERVOIR ENGINEERING
ENPE 429, Fall 2016
Assignment no. 2
Assigned: Oct. 2, 2016
Due: Oct. 17, 2016 (11 am)
Problem 1
A laboratory cell contained 290 cc of reservoir liquid at its bubble point pressure of 2100 psia a