Download - International Pavilion

PETROLEUM POTENTIAL OF THE
ALBERTINE GRABEN, UGANDA,
CONFIRMED
Presented
By
Reuben Kashambuzi
Commissioner,
Petroleum Exploration and Production Department, Uganda
at the AAPG Convention 2006, Houston, Texas, USA
PRESENTATION OUTLINE
1. Regional Setting of the Albertine Graben
• EARS
• Volcanism
2. Structural Setting
3. Hydrocarbon Play Indicators
•
•
•
•
Source rocks
Reservoirs
Traps
Seals
4. Concluding Remarks
• Key facts about Uganda
• Investment Opportunities
REGIONAL SETTING

The EARS bifurcates into two
arms
Ethiopian rift




Eastern and Western arms
separated by Tanzanian Craton
Albertine
Graben
Northern most part of the
Western arm of the East
African Rift System
500 Km long, averaging 45
km wide and 23,000 sq km
Volcanic processes are not
widespread in the Western arm
as they are in the Eastern arm
Tanzanian
Craton
EARS
STRUCTURAL SETTING
25000
0
25000
30°30'
50000
31°
31°30'
32°
32°30'
Sudan
75000
metres
oma
in
3°30'
Arc 1960 / UTM zone 36N
LEGEND
Rift sedim ents
-160
-150
3°
3°
No r
ther
nd
5
-160
-160
2°30'
-180
Gravity depocentre
2°30'
Mesozoic Basin
1
R. Nile
Norm al fault
-200

Continental Extension – NW-SE
Strike slip
30°
-180

29°30'
3°30'

Grabens and half grabens
separated by accomodation
zones
Graben strongly shaped by;
0
-17

Accom odation zone
ny
i
Wa
ki
ic
Ka
se
R. Kafu
nd
a
m
oc
r
of atic
Co R
ng epu
o bl
De
La
ke
A
lb e
rt
2°
1°30'
0°30'
oma
i
Lake
Victoria
8
- -1
1 7 7
0
0 5
Northern & Southern
Domains: Oblique Extension
1

0°30'
Sou
Lake
George
th e
rn d
an
ug
ur
u
vo
lc
4
6 5
ny
ar
Lake
Edward
- 01
os
K a twe K ik o ro n g o
-1 6
0°
Central Domain: Orthogonal
extension
Bu

0°
n
R.
Se
m
li k
i
0°30'
0°30'
U
ga
1°
0
1 0
- 2

3
n
Ce
1°

Northern trends in a NNE-SSW
Central trends in a NE-SW
Southern trends in a NNE-SSW
ain
m
o
ld
tra
0
- 2

2
1°30'
Three structural domains:
- 22 0 0
1 0

a
sw
M
Oil Seep
Volcanics
2°
Relay ram p
29°30'
30°
30°30'
31°
31°30'
32°
32°30'
Summary tectonic map of the Albertine Graben
HYDROCARBON PLAY INDICATORS
Source Rocks:

Rocks with good source potential
have been mapped in the Graben
e.g. Kaiso Tonya.

Good source rocks reported in the
Waki-B1, Turaco, Mputa and
Waraga wells

Inferred from oil seeps

High quality lacustrine mature
source rocks encountered in the
wells drilled on the Turaco, Mputa
and Waraga prospects.
Kaiso-Tonya shale
HYDROCARBON PLAY INDICATORS Cont’d
☼
☼
Turaco-2 Lithology log. Good source rocks were reported in the
well
Waki B-1 Lithology log. Excellent source rocks were encountered
HYDROCARBON PLAY INDICATORS Cont’d
Oil Seepages
Paraa

Distributed along the
entire length of the
Albertine Graben

Different geochemical
characteristics indicating
multiple sourcing
Sonso
Runga
Kibiro
LAKE
ALBERT
Kaiso Tonya
Confirmed Oil Seeps
Reported Oil Seeps
Kibuku
Oil Seeps interpreted from
Radar Imagery
0
10
20 30Km
Radar Imagery of the Albertine Graben showing interpreted and
confirmed oil seeps
HYDROCARBON PLAY INDICATORS Cont’d
GEOLOGY MAP OF KAISO-TONYA AND BUTIABA AREA
260000
30000
290000
280000
270000
310000
320000
330000
340000
350000
Oil Seepages
360000
Pakuba
±
Porombo
Panyimur
O
VIC T
^_
I LE
A N<
RI &
^_^_
Paara
<
&
R. Z
^_
o i la
^
^_
_
Wanseko
Oil Seepage in highly crushed
basement at the Kabyosi oil
seep in Kaiso – Tonya area
R. S
Bulisa
am
b iy
R. Z oliya
o l iy a
Katara
e
R. Z
Wairingo
Camp
ig
a
Oil film floating on the Victoria Nile
a
R. W
Kabira
Bugoigo
R.
ai
R. W soke
To
Masindi
S onso
^`
&
<
Butiaba
200000
T
ER
Waki
R. W
B
AL
KE
LA
aki^`
Biso
Runga
Runga 1
190000
Runga 2
Kibiro
HOIM
Legend
_
&
<
R. K
it
awe
O
To
Hoima
H oi
R.
mo
Tonya Point
190000
Kibiro 2^
<^_
&
^_
&
<
<^_
&
180000
Oil seep from shallow well at Kibiro
To
Masindi
<^_
^_&
&
<
310000
R.W
Kaiso
YA HUN TING
AREA
by a
amba
KAISO TON
BISERUKA
170000
Surficial Deposits
Quartizites
Road
Kaiso Formation
Gneiss
Path
Sebugoro Formation
Schists
Rivers
Upper Warwire Formation
Diorites
Fault
Warwire Formation
Gabbros
<
&
Oil Seep
Nkondo Formation
Calcic Silicates
^_
Station Point
Laterite
Eclogites
%
Waki well
170000
To
HOIMA
R.H
300000
oh
wa
NYAMASOGA
Sebugoro
^_
^_KABAALE
160000
Nkondo^_
R.
^^_
_
W
ar
^_
260000
^_
^_
&
<
^_ ^_
160000
290000
Mafic Intrusives
To
KIZIRA-NFUMBI
wire
^&
<^_
^_ &
<_
&
<^_
&
<
0
KASEETA
270000
TO
KABWOYA
280000
10
20
40
60
80
23
Oil
impregnated
channel
Hoima Basin
sandstone
of the Kaiso FM on
100
the banks
of R. Hohwa
Kilometers
HYDROCARBON PLAY INDICATORS Cont’d
Reservoir rocks:

Thick (100-200m)
and well sorted
sandstones

Good porosities of
the order of 30%

Good permeability

Multiple pay zones
confirmed by
drilling (Mputa-1
and Waraga-1)
Sebugoro Formation
Hohwa oil sandstone
Kisegi Formation
HYDROCARBON PLAY INDICATORS Cont’d
Traps:
Residual gravity anomaly map of EA2, showing distribution of gravity
highs oil seepages and well locations

Sedimentary structures in
the Graben are basement
related

Residual gravity anomalies
reveal several structures

Structures have been
confirmed by seismic data
and tested by exploration
drilling

Compares well with Sudan
where major oil fields
coincide with gravity highs
HYDROCARBON PLAY INDICATORS Cont’d
Semliki structures




Saddlebill






Residual gravity anomaly map of Semliki Basin, EA3A
Turaco-1,2&3 drilled on a
gravity high
Turaco – Encountered natural gas
contaminated with CO2 in the
ratio CH4 : CO2 of 1:4
Good reservoirs
High flow rates (60 mmcft/d)
Good seals
Good source rock quality
Multiple reservoirs
Shallow biogenic (?) gas (600700m depth)
CO2 not extensive
Gravity reveals other significant
subsurface structures also
confirmed by seismic
HYDROCARBON PLAY INDICATORS Cont’d
Kaiso-Tonya structures


Mputa and Waraga Prospects
tested by exploration drilling
GEOLOGY OF KAISO - TONYA AREA
270000
280000
S
ab
mb
ya
a

Shows in fractured basement

Wells cased and suspended
for re-entry for testing
re
oro
Thin sandstones
ar
wi
S
abyosi

Nkondo
W
Surficial Deposits
Quartzite
Kaiso Formation
Gneiss
Sebugoro Formation
Hoima Basin
Upper Warwire Formation
Fault
Warwire Formation
Motorable Path
Minor River
Nkondo Formation
R
.K
Multiple reservoirs
Legend
r
w
Hoh
S
R.

Mputa #1
Sebugoro
160000
Wa
S
g
bu
Se
R.
Oil samples extracted for lab.
analyses
.
R
Kaiso
170000
R iv e

±
Tonya Point
Rich shales
Oil shows
310000
S
180000
Waraga #1

Kibiro
300000
290000
1
Major River
Laterite
S
Mafic intrusives
+
U
Villages
Seepage
14B
+
U
+
+U
U
0
5
10 KM
General geology of Kaiso-Tonya showing the Mputa and Waraga well location
Copyright: Petroleum Exploration and Production Department, Marc
HYDROCARBON PLAY INDICATORS Cont’d

Kaiso-Tonya structures
Mputa and Waraga Prospects
coincide with significant
gravity highs

The gravity structures have
been confirmed by seismic
data

Prospectivity of other
structures still to be confirmed
Residual gravity anomaly map of Kaiso-Tonya, EA2
HYDROCARBON PLAY INDICATORS Cont’d
Amplitude
30000.000
20000.000
10000.000
0.000
-10000.000
-20000.000
-30000.000

Typical traps
Flower Structures
ts-HOG 2001 02
CMP
Shot
0.00
19
110
39
120
59
130
79
140
99
150
119
160
139
170
159
180
179
190
199
200
219
210
239
220
259
230
279
240
ts-HOG 98 01
299
250
319
260
339
270
359
280
379
290
399
300
419
310
439
320
459
330
479
340
499
350
519
360
539
370
559
380
579
390
ts-HOG 2001 01
599
400
619
410
639
420
659
430
679
440
699
450
719
460
739
470
759
480
779
490
799
500
819
510
839
520
859
530
879
540
899
550
919
560
939
570
959
580
979
590
999 1019 1039 1059 1079 1099 1119
600 610 620 630 640 650 660
0.50

Rollover anticlines
1.00

Inversion anticlines
1.50

Potential for
stratigraphic traps
2.00
2.50
Seismic section showing an inversion anticline in Semliki Basin
HYDROCARBON PLAY INDICATORS Cont’d
Amplitude
0.000
-3999999999999999900000000.000
-7999999999999999900000000.000
-11999999999999998000000000.000
-15999999999999998000000000.000
-19999999999999998000000000.000
Traps Cont’:
CMP
Shot
0.00
7326
4640
A -HLA 03 021
7166
4560
7006
4480
B
A -HLA 03 023
6846
4400
A -HLA 03 025
6686
4320
6526
4240
A -HLA 03 027
6366
4160
A
A -HLA
A03
-HLA
029
05-09_filtmig
A -HLA 03A081
-HLA
A -HLA
03
A -HLA
031
05-1
A -HLA
03
5_filtmig
A
083
-HLA
05-17X_filtmig
03A085
-HLA 03 033
6206
4080
6046
4000
5886
3920
5726
3840
5566
3760
5406
3680
A -HLA 03 035
5246
3600
A -HLA 03 037
5086
3520
4926
3440
A -HLA 03 039
4766
3360
0.50
1.00
1.50
2.00
2.50
3.00
Syncline
3.50
Inversion
Anticline
4.00
5 Km


Structural highs observed on the seismic sections are
potential hydrocarbon traps - inversion anticlines
Structural lows represent possible ‘Kitchens’
4606
3280
A -HLA 03 041
4446
3200
4286
3120
A -HLA 0
4126
3040
HYDROCARBON PLAY INDICATORS Cont’d
Seals:
M
BUTIABA WAKI
FT
WELL TD 4058' BASEMENT
OIL AND POSSIBLE GAS
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
0
0
0
0
0
O
200
O
O
0
0
300
0
O
1000
0
O
0
O
O
O
O
0
O
0
O
O
0
O
0
O
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
400
0
0
0
O
0
0
0
0
O
0
O
0
O
O
0
0
SEEPS ARE KNOWN ON
O
0
0
0
O
0
O
0
0
0
O
0
0
O
O
0
O
0
0
O
0
0
O
0
0
0
O
0
O
0
O
0
500
0
0
O
0
KAISO FORMATION
100
1500
LACUSTRINE SANDS
AND
CONGLOMERATES
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
1720'
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
KISEGI FORMATION
2000
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
700
2500
__ __ __ __ __ __ __ __ __ __
800
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
900
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
3000
1000
O
O
0
0
O
0
O
0
0
0
O
0
O
0
O
0
0
O
0
Observations from Turaco,
Mputa and Waraga exploration
wells confirm effective seals
1100
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
WAKI

JURASSIC
__ __ __ __ __ __ __ __ __ __
3500
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
1200
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
4000
0
0
0
OO
0
O
0
O
O
0
THE OIL SEEPS MAY BE
OF TWO KINDS.
-THE SUDANESE HIGH
WAX, HIGH POUR POINT.
SOURCED FROM
LACUSTRINE SHALES.
- A MORE PARAFFINIC
SEEP? SOURCED
FROM MORE MARINE
SHALES.
FLUVIO LACUSTRINE
WITH SOME BITUMINOUS
SHALES
BITUMINOUS SHALE
0
O
O
THE SURFACE.
SANDS AND SHALES
O
0
FORMATION
600
LOWER MIOCENE TO PLIOCENE
Wide spread clays, some quite
thick, provide regional seals.
Clays have been mapped across
the Albertine Graben
__ __ __ __ __ __ __ __ __ __
500
TERTIARY

PLAYS, PRODUCTION
AND SHOWS
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
__ __ __ __ __ __ __ __ __ __
EARLY PLEISTOCENE
Alternating shales and
sandstones observed in Waki-B1
well suggest good sealing
mechanism
QUATERNARY

3320'
BITUMINOUS SHALE
FLUVIO LACUSTRINE CLASTICS
POSSIBLY EQUIVALENT TO UPPER
IN THE WELL AT 3850' A SAND
WITH ASPHALTIC OIL WAS
FOUND, NO TEST.
JURASSIC STANLEYVILLE FORMATION
OF THE CUVETTE CONGOLAISE.
4008'
BASEMENT
Waki B-1 well lithology. Oil shows were encountered at 3850 ft
KEY FACTS ABOUT UGANDA

Population Size:
27 million people

Size of country:
241,038 Sq. Km

GDP:
US$ 6.8 Billion

Export Earnings:
US$ 547.5 Million (2004)

Fuel Consumption:
681,248.8 m3 (US$ 156.9 m/year), 2005

Installed Capacity:
300 MW of electricity

Available Power:
140 - 220 MW of electricity

Power demand:
~ 500 MW of electricity

Power shortage:
Effect of prolonged drought

Thermal Generation:
50 MW to increase to 200 MW (End 2006)
Confirmation of shallow gas in Turaco would alleviate the problem
INVESTMENT OPPORTUNITIES
PETROLEUM EXPLORATION AREAS 1, 2, 3A, 3B, 4 & 5
30 E
4 N4 N
4N
MOYO
Rail
%
Boundary of Exploration Area
National Boundary
Exploration Area 3
NIMULE
Waki Well
!
Oil Seepage
I.
Hotel
p
AirStrip
Rhino Camp
Basin
p
B E RT
NI
LE
I.
AL
±

a)
b)

IC
TO
RI A NI LE
!
<
<
BUTIABA
<
<
p
%
I.
<
<
K
Hohwa
! !!
<<
<
LA
2
I.
HOIMA
R.KAF U
I.
I.
p
FORT PORTAL
MUBENDE
R.KATONGA
KASESE
• EA3B Semliki Basin
• Size: 1,795 Sq. Km
0
• Not licensed
L.GEORGE
0
Lakes Edward &
George Basin
I.
• EA2 Lake Albert Basin
• Size: 4,675 Sq. Km
• Licensed: Hardman
Resources (U) Ltd on 8st
October 2001
• EA3A 1Semliki
Basin
N
• Size: 1,982 Sq. Km
• Licensed: Hearitage Oil and
Gas and Energy Africa on 8th
Sept 2004
3B
<
!
IK I
KIBUKU
UGANDA
Semliki
Basin
Turaco Prospect Area
MASINDI
<
Runga !
KIBIRO
!
!
E
!
2N
Sonso
WAKI-1
RT
A
BE
!
3A
Gas condensate
Shallow biogenic gas
High quality reservoir
conditions established
KASENYI
<
DEMOCRATIC
REPUBLIC OF
CONGO
L
<
!
ML

!
!
MSWA
1N
V
I.
Northern
Lake Albert
Basin
SE

p
!
PAARA
R.

1
1
GULU
• EA1 Packwach Basin
• Size: 4,285 Sq. Km
• Licensed: Heritage Oil and
Gas (U) Ltd on 1st July 2004
Pakwach
Basin
<
NEBBI
Exploration Area 3B
1,795 Sq. Km
390 Sq. Km of 3D seismic data
410 Line Km of 2D seismic data
Lithology and wire line data
from 3 wells
Structures with potential for ;
p
I.
2N

• EA5 Rhino Camp Basin
• Size: 6,040 Sq. Km
• Licensed: Neptune
3N
Petroleum
(U) Ltd on 27th
Sept 2005
5
ARUA
3N
A

Road
Exploration Area 4
SW

Rift Sediments
R.A

5,910 Sq. Km
Acreage on land and on the lake
Geological & Geophysical data
Sediment thickness, over 4 Km
SUDAN
Legend
Exploration Area 4

32 E
31 E
<
AVAILABLE ACREAGE
p
LAKE
I.
EDWARD
MASAKA
4
LAKE
I.
p
MBARARA
• EA4 Lakes Edward-George
Basin
• Size: 5,910 Sq. Km
• Not yet1 S licensed
VICTORIA
1S
30 E
31 E
0
32 E
25
50
75
100
125
Km
PLEASE CONTACT
Uganda Booth No. 461
at the International Pavilion
OR.
The Commissioner,
Petroleum Exploration and Production Department,
21–29 Johnston Road
P. O. Box 9,
Entebbe (Uganda)
Tel:+256 041 320714
Email: [email protected]
Website: www.energyandminerals.go.ug
THANK YOU