1. SENEGAL BASINS POTENTIAL & ACREAGE By Mrs Nd. Rokhaya.Diallo
Manager Basin Geology
Petrosen

2. Dakar LOCATION AREA : 196 192 Km2 POPULATION : ~12 000 000 hbts
DENSITY: 51 h / Km2
GNP : $
Dakar

3. overlying a Paleozoic basin
REGIONAL SETTING
NW African coastal basin
the MSGBC
Mesozoic-Cenozoic
passive margin basin
overlying a Paleozoic basin
no wells in deep water

4. RESERVOIRS & SEALS
Upper Devonian shales
Devonian sandstones :fine to coarse grained, often oolithic with porosities ~ 15% - 20%.
Upper Tertiary shaly sequences
Lower Tertiary clastics and carbonates
Upper Cretaceous sands and shale sequences
Jurassic - lower Cretaceous
carbonate section
Ordovician sandstones : no primary porosity, but intensely fractured, good secondary porosity having excellent deliverabilty

5. in CM-7 SOURCE ROCKS & MATURATIONc Best source rocks
Cenomanian-Turonian and Albian
in CM-7
Cenomanian level at 2608m with
TOC = 8.72 %
HI = 660 mg/g
in CM-10
Turonian level at 2554 m with
TOC = 5.25 %
HI = 638 mg/g

6. SOURCE ROCKS & MATURATION
Silurian shales :
best regional source rocks
TOC ~ 1% - 3%
Ro ~

7. HYDROCARBON OCCURRENCES & PRODUCTIONcF G P
Top
Neocomian
Lmst
CRETACEOUS
TERTIARY
PLIO-RECENT
MIOCENE
OLIGOCENE
EOCENE
PALEOCENE
CAMPANIAN
MAASTRICHT.
SANTONIAN
TURONIAN
CENOMANIAN
ALBIAN
APTIAN
JURA
NEOCOMIAN
MALM
DOGGER
3D SEISMIC
PICKING
K 130
K 110
K 110 a
K 100
K 120
K 090
K 070
T 090
T 060
T 080
T 040
T 030
T 020
MIXED SYSTEMS
DELTAIC VS CARBONATE PLATFORM
OPEN MARINE
CARBONATES
Aptian transgression
PROGR. CARB. PLATFORM
DELTAIC AND SHALLOW MARINE CLASTICS
SLOPE DEPOSITS AND CONFINED TURBIDITES
SHALLOW TO OPEN MARINE
Turonian transgression
Senonian
unc.
Lower
Miocene
Oligocene unc.
Upper
Dakar
Canyon
TESTED
RESERVOIR
FIELD
(or Reference Well)
CHINGUETTI, THIOF, BANDA
PELICAN
DOME FLORE, DOME GEA
DIAM NADIO
GADIAGA
DKM 2, RF 2
FAUCON ? - (CVM 1)
JAMMAH 1 - (CVM 1, FAUCON)
DKM 2
RF 3 - (CVM 1)
SOURCE VG
Ref.
Well
DSDP
367
CM 10
FAUC.
???
Oil
Condensate
Gas

8. HYDROCARBON OCCURRENCES & PRODUCTION
Diam Niadio field
Gadiaga field
Dome Flore & Gea fields

9. 217 393 033 Nm3 (7.6 Bcf) 62 642 bbs light oil 34° API
HYDROCARBON OCCURRENCES & PRODUCTION
Gadiaga field
~ Nm3 ( BCF )
producing since Oct 2002
ANNEE
PRODUCTION DE GAZ (Nm3)
CUMUL (Nm3)
Octobre 2002 3 
2003
12 
16 
2004
15 
31 
2005
15 
47 
2006
12 
59 
2007
10 
70 
2008
76 
2009
17 
94 
Diamniadio field
Nm3 (7.6 Bcf)
from 1987 to 2000
bbs light oil 34° API
bbls condensate
2009 : Nm3 (~600 mmscft)
759 bbls condensate

10. DOME FLORE & GEA Heavy Oil in Oligocene limestones
( 10 – 13 ° API ~ 1Bbls )
Light Oil Maestrichtian
( 33° API )
Oil shows in Miocene & Albian sands
Flore & Gea fields

11. GAS TRANSPORT NETWORK Gadiaga field
Kabor storage and epuration station
Gas Turbine at Cap des Biches
34 km
- 10 km
- 9 km
Cement plant 11

12. CONTRACT AREAS Licenses 3 PSC offshore 3 PSC onshore 5 Companies
5 blocks under negotiation
5 open blocks offshore
3 open blocks onshore

13. REVIEW OF RECENT EXPLORATION ACTIVITIES

14. SEBIKHOTANE Avril 2003 DN-15B in 2006 commitment : 2 exploration wells
Konkorong-1
Baobab-1

15. TAMNA 6 wells drilled the last two years Gas in Lower Senonian sands
connected to transport system
~ Nm3 to SOCOCIM cement plant presently
~ Nm3 / day possible delivery to SENELEC power plant
October 2006

16. Structural/Stratigraphic traps
SAINT LOUIS offshore
60 %
30 %
10 %
Structural/Stratigraphic traps
west of the Cayar fault zone;
Structural traps within the
Cayar fault zone;
Turbidites/mas flow deposits west
the Cayar fault zone
granted 2003
1200 km 2D Juillet 2004

17. Acquisition 620 km2 of 3D in March-April 2008
Ibis & Flamengo leads

18. SAINT LOUIS offshore profond
1500 Km 2D
high frequency airmag survey
4225 Km2
5695 line Kms
Satellite seep study
economic evaluation
(1.5 TCF)

19. CAYARS offshore blocks
~ 1690 km 2D on March 2006
Airmag survey March 2007

20. CAYARS offshore blocks
December 2008

21. RUFISQUE offshore profond
2088 Km 2D Nov/Dec 2004
1500 km2 3D Jan/ Feb 2007
Relinquished by Edison/Petrobras

22. SANGOMAR - RUFISQUE 90 % 10 % 2050 km2 3D ( Feb - Mar 2007 )
November 2004

23. plays & leads N S N S L Cretaceous Carbonate shelf Margin play
Top
Aptian
Senonian Unconformity
Depth
3D line 1541
Albian
Buried
hills
3D Line 9076
Santonian fans N S
Slope fan play
Albian N S
3d Line 9076
Depth
Prospective
dip closed
Interval
Top Aptian
High amplitude
Upper slope
Fan complexes
Neocomian
Senonian Unconformity
3d Line 1541
Depth
Turonian

24. SENEGAL OFFSHORE SUD
About km of 2D from 1973 et 2001
8 wells

25. PALEOZOIC BASIN Prospective Area : East Meridian 16°
Bassins intracratoniques
Prospective Area : East Meridian 16°
Surface : environ km²
Two sub-basins East Meridian 15°

26. PALEOZOIC BASIN

27. SENEGAL EAST AREA 2 bassins L1 et L2 identified Basin L1 L2
NiF-1
KrF-1
DiF-1
Basin L5
190 km H1 H2 H3 H4 H5 L1 L2 L6 L3 L4
Landsat 7 ETM+
ERS SAR

28. PETROLEUM LEGISLATION
LEGAL AND FISCAL TERMS

29. LAW N° 98-05 of January 08, 1998 (PETROLEUM CODE)
PRODUCTION SHARING CONTRACT (PSC)
EXPLORATION
Initial Period: 3-4 years
Renewal Periods: 2-3 years
EXPLOITATION PERIOD
Initial Period: 25 years
Extension Periods: years

30. EXPLORATION WORK PROGRAM & EXPENDITURE OBLIGATIONS
to be negotiated
RETENTION PERIOD
If a discovery is certified non commercial, Contractor may be granted a Retention Period of maximum:
3 years for crude oil
8 years for natural gas

31. PETROSEN’S PARTICIPATION
Exploration phases: Carried Interest of 10 %
After Commercial discovery: Working Interest up to 20 %
FISCAL REGIME
Twenty five per cent (25%) Income Tax
( applied on net profit )

32. Senegal Basin has generated oil and gas
THANK YOU
Senegal Basin has generated oil and gas
Diamniadio, Gadiaga and Casamance Dôme Flore
Presence of world class source rocks in Turonian-Cenomanian
secondary good sources in Albo-Aptian and Jurassic
Petroleum system in Deep water
with various structural trends and traps
km2 underexplored Paleozoic basin
with good reservoirs in Ordovician and Devonian
and good source in Silurian, and traps and plays
identified
Law with flexible terms