ENS5566 Reservoir Engineering
Edith Cowan University School of Engineering Reservoir Engineering ENS5566
Theory exercises-Part2/2
Important Information:
- Answer ALL
- Ensure you put your name on ALL material to be submitted as part of you answer.
- State any/all assumptions made.
- This is an open book exercise
Q1) A dry gas reservoir has produced as follows (70 Marks):
|
Date |
Cumulative production MM SCF |
Static Res. Pressure psia |
|
07-Jan-65 |
0 | |
|
07-Jan-66 |
1800 |
3461 |
|
09-Jan-67 |
3900 |
3370 |
|
10-Jan-68 |
5850 |
3209 |
|
11-Jan-69 |
9450 |
3029 |
Data
Reservoir Temperature T= 100°F
Gas Gravity SG= 0.68
- Determine the original pressure and original gas in place.
- What will be the average reservoir pressure at the completion of a contract calling for delivery of 10 MM SCF per day for 5 years (in addition to the 9,450 MM SCF produced to 11-Jan-69?)
Q2) A gas reservoir without water drive contains 500 million standard cubic feet of gas at an original pressure of 3,000psia. How much gas has been produced when the reservoir pressure has declined to 2,900 psia. Use Bgi and Bg for the initial and 2,900 psia pressure as 0.0010 and 0.0011 bbl/scf. (30 Marks)
