University of Yangon, Department of Geology, Petroleum Geology, Regular presentation By First Year Masters

1. Burgan Greater
OIL Field
Group Assignment
By
Mg Aung Myat Thein
Mai Ei Phyu Phyu Kyaw
M1 – Geol - 5
M1 - Geol - 35
8-August-2018

2. Outline
 Introduction
 History
 Geology
 Oil reserves and Production
 Conclusion

3. Introduction
• This field is located in
the desert of southeastern
Kuwait; Middle East
• Onshore oil field
• The world’s largest
sandstone oil field
• 29°06′39″N, 47°58′00″E
• ~750 Km2

4. History
• Discovered in 23, February, 1938
• Discovery was based partially on magnetics and
oil seeps.
• The second largest overall, after Ghawar
• In 1946, start of production (By KOC)
• Production with original pressure about 40 years
• Peak of oil production in 2005

5. • First of seawater injection was started in 1999.
• 1200 well were drilled since the field discovered
• 1991 - Iraqi soldiers set the Burgan Field on fire as
they retreated during the Iraq war. A total of 297 well
fires were extinguished
• An estimated 1.4 GBO was lost during the seven
month
• 2013 - Fourth most productive oilfield worldwide

6. • 2010 - Chief Executive of the Kuwait Oil
Company reported that Burgan produced half
of Kuwait’s oil.
• From 1948 through 2016 the Burgan
complex has produced 32.5 GBO.
• Its production costs are by far the lowest of
any oil field in the world.

7. Geology
• It include three producing
subfield
 Burgan (500 Km2)
 Magwa (180 Km2)
 Ahmadi (140 Km2)
• These subfield base on
three structural dome

8. • This field lies within the
Arabian basin
• It is an anticline structure that
is 30 miles long.
• It has numerous faults (~250),
these may act seal to fluid
flow
• Magwa and Ahmadi are
separated from Burgan by a
central graben fault complex
• Producing horizons share
similar sub sea oil/water
contacts and their primary
drive mechanism is underlying
water.

9. Sandstone
Limestone
sandstone
Quartz-rich, multi-darcy
Porous Sand
Sandstone
Quartz-rich Porous Sand
75% oil production

10. • The Burgan to Mauddud interval represents an overall
transgressive sequence
• Wara and Burgan formation were deposited in a fluvial
deltaic environment on the continental shelf margin of the
ancient Tethys Ocean
• Both formations are separated by carbonate succession of
Mauddud Formation which deposited in a shallow marine
environment
• The Mauddud limestone reservoir with low permeability
from 1 to 50 md

11. • The Middle Third Burgan is the most prolific
reservoir from which more than 75% oil production.
• The middle third Burgan reservoir mainly consists of
multi-Darcy sand and with very strong aquifer
support.
• The Upper Third Burgan and Lower Third Burgan
reservoirs are of lower sand quality and poor sand
connectivity.

12. • The Lower Third Burgan acted as conduit in the past
for fluid migration from the fourth sand to Middle
Third Burgan.
• Burgan' formation containing 35% porosities and
permeability of over 400 millidarcies
• The Fourth Burgan reservoir is the lowest major
producing zone

13. • Shale layers that separate the Upper, Middle, and
Lower Third Burgan sands
• The hydrocarbon-bearing intervals are between 7,400
and 8,000 ft deep and are normally pressured.
• The total reservoir thickness is 1500 feet
• The reservoir temperature is 170ºF
• 4 to 15 barrels of oil per day/pounds per square inch.

14. • The initial reservoir pressure in the upper Burgan is
estimated to have been 3,855 pounds per square inch
gauge (psig)
• A single original oil/water contact (OWC) is reported,
there was vertical communication between different
reservoirs

17. Oil reserves and Production
Type II Kerogen
Oil and Gas Prone

18. • The 28-36⁰ API mature oil is produced from Wara
and Burgan Formation
• Oil gravity decreases with depth
• The sulfur content is approximately 2.5%.
• 1972 - 2,400,000 barrels per day
• 2005 - Production capacity: 1,700,000 barrels per day

19. • Current production – 1,200,000barrels per day for oil,
• 550 MMcf
• Estimated oil in place – 61 GBO
• Current producing formations Wara (K1)

20. The Burgan complex is expected to produce for the
next 30-35 years and ultimately recover 61GBO and
38Tcf gas.

21. Schematic wellbore
completion diagram
showing Wara production
up the annulus of the casing
and Third Burgan
production up the tubing
string.

22. Conclusion
• The world largest siliciclastic field and second largest field
• 3 main reservoir
• Current producing reservoir is Wara formation
• Water drive mechanism
• Type II Kerogen , oil and gas prone
• URR 61 GBO and 38 Tcfg
• 2.5% sulfur content
• 28 -36 API⁰

23. • 1,200,000b/d and 550 x106cu ft/d current
production
• Estimatily 35 GBO have been produced from
this field
• Except to produce for the next 24 – 30 years

24. Oil and Gas Bearing basin of Myanmar