1. “Lucky” Group 13:
The Most Interesting Team In The World
Members:
Ryan Arthur
Dalton Worms
Dave Corinchock
Scott Besselman

2. Project Goals
• Characterize the reservoir
• Find original oil in place
• Make a production forecast
• Construct maps showing potential for
continued recovery
• Recommendation/discussion of possible EOR
techniques

3. Characterization of the Reservoir
• Net Pay-Zone Thickness
• Average: 139.3 ft
• Porosity
• Average: 14.1%
• Permeability (Directional)
• Average: 8.12 mD
• Lemen, Burlas and Roe. (1990) “Waterflood Pattern Realignment at
the McElroy Field: Section 205 Case History.” SPE Paper 20120.

4. Surface Map of Net Pay-Zone
Thickness

5. Surface Map of
Porosity

6. Surface Map of
Permeability

7. Original Oil in Place (OOIP)
• Using Porosity and Net Pay-Zone Thickness
• Pore Volume = 510 MM cu. ft.
• From Chevron data:
• Swi = 0.26
• Bo = 1.143
• No Gas/Oil Contact
• Original Oil In Place
= 63.31 MM STB

8. Chevron Production Data
• Produced Oil: 26.17 MMSTB
• Original Oil In Place = 63.31
MMSTB
• Recovery Rate: 41.3%

9. OOIP (STB/acre-ft)

10. Remaining Oil (STB/acre-ft)

11. Percentage of OOIP Remaining

12. Production vs. Time
1400000 Oil Production History
1200000
1000000
Production (STB / year)
800000
600000
400000
200000
0
1930 1940 1950 1960 1970 1980 1990 2000 2010 2020
Time (years)

13. Water Injection and Production
8000000 Water Injection and Production
7000000
History
6000000
Water Quantity (STB/year)
5000000
4000000
Inj.
Prod.
3000000
2000000
1000000
0
1930 1940 1950 1960 1970 1980 1990 2000 2010 2020
Time (Years)

14. Water Injection and Production
Ineffectiveness of Current Waterflood
Water Inj.
Water Prod.
Oil Prod.
1930 1940 1950 1960 1970 1980 1990 2000 2010 2020
Time (Years)

15. Analysis of Reservoir Production
• OOIP = 63.31 MM STB
• Produced Oil = 26.17 MM STB
• Remaining Oil in Reservoir = 37.14 MM STB
• Sor = 39%
• Volume of Oil Remaining that can be produced =
3.76 MM STB
1
0.9 Krw
• Percentage of OOIP = 6% 0.8 Krow
0.7
Relative permeability
0.6
0.5
0.4
0.3
0.2
0.1
0
0 0.2 0.4 0.6 0.8 1
Water Saturation

16. Analysis of Reservoir Production
• Current Price of Oil = $109 per BBL
• Value of Remaining Oil in Reservoir = $410 million
• Remember: Remaining Oil Percentage of OOIP = 6%
• 2010 Production Rate = 75 M STB
Production vs. Time
1400000
1200000
Production (STB / year)
1000000
800000
600000
400000
200000
0
1930 1940 1950 1960 1970 1980 1990 2000 2010 2020
Time (years)

17. Plans of Action
• Possibilities:
• 1) Wait until reservoir reaches economic limit and then end production
• 2) *Expansion of Injector lines to improve Waterflood*
• 3) Use of Surfactant to reduce Residual Oil Saturation
Well Production Data (Previous 3 Years)
• 1254: Water Prod = 76 M STB
Oil Prod = 1.4 M STB
• 1256: Water Prod = 80 M STB
Oil Prod = 1.6 M STB