Introduction to the petroleum system of Niger Delta Province. Geological aspects, small statistical data analysis to evaluate the general reservoir properties, oil chemical features. CRISTIANO ASCOLANI, PHILIPP MESTERS, JEAN-MARC SÖLDNER. Ruhr-Universität Bochum, Petroleum Geology I, Summer Semester 2014. Reservoir analysis based on: 1) AMIGUN, John Olurotimi, and Oluwaseyi Ayokunle ODOLE. "Petrophysical Properties Evaluation for Reservoir Characterisation of SEYI Oil Field (Niger-Delta)." International Journal of Innovation and Applied Studies 3.3 (2013): 765-773. 2) Chiaghanam, O. I., et al. "Reservoir Characterisation Of Konga Field, Onshore Niger Delta, Southern Nigeria." International Journal of Science & Emerging Technologies 3.1 (2012). 3)Aigbedion, I., and S. E. Iyayi. "Formation Evaluation of Oshioka Field Using Geophysical Well Logs." Middle-East Journal of Scientific Research 2.4 (2007): 107-110. 4) Adewoye, O., et al. "Petrophysical and structural analysis of maiti field, Niger Delta, using well logs and 3-D seismic data." Petroleum & Coal 55.4 (2013): 302-310. 5) Ogbe, Ovie Benjamin, Opatola, Olatunji Abraham, Idjerhe Wilson and Ocheli Azuka. "Reservoir Quality Evaluation of Sand Bodies of K-Field, Onshore Niger Delta, Using Wireline Logs". International Journal for Science and Emerging Technologies with Latest Trends” 13.1 (2013): 46-64.

1. THE NIGER DELTA PROVINCE
NIGERIA
CRISTIANO ASCOLANI, PHILIPP MESTERS, JEAN-MARC SÖLDNER
PETROLEUM GEOLOGY I – SS 2014
Fig. 1: Satellite picture from Niger delta

2. 2
Nigeria: general facts
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
• 9°04'55.80''N
8°14'31.00''E
• Altitude: 417 m
• Total surface: 923.768 km²
• Capital: Abuja
• Independence day: 1st october
1960
Fig. 2: Geographical map of Nigeria

3. 3
The Niger Delta
• Wave-dominated morphology
• Extension: 70 000 km²
• Width: 200 km
• Average flow rate: 30 000 m³/s
• Comprising of clastic sequence
up to 12 km thick
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 3: Coastal line of the Niger delta Fig. 4: Delta-mode diagram

4. 4THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Rifting events
Fig. 5: Rifting events chart through the Cretaceous

5. 5
Petroleum deposits
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 6: Map of the Niger delta's petroleum deposits

6. 6
Geological overview
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014 Fig. 7: Geological map of Nigeria

7. 7THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Facies distribution of the Niger Delta
Fig. 8: Maps showing the geological setting of the Niger delta in a section

8. 8
The Niger Delta
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 9: Geological section through the sedimentary layers of the Niger delta's mouth

9. 9THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Structural pattern
Fig. 10: Geoligical section through the Agbada-Akata-formation showing sedimentary deposits and
time-line feautures

10. 10
Structural pattern
• Mostly, oil occurs in
tectonical structures
as roll-over anticlines
• Roll-over structures are
due to listric fault
extensions
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 11: Structural pattern of the Niger delta's rock units

11. 11
Stratigraphy of the Niger Delta
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 12: Stratigraphic column

12. 12
Events chart
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 13: Petroleum events chart of the Agbada-Akata-formation

13. 13
Reservoir data analysis
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 14: Position of the five oil fields

14. 14
Reservoir parameters
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
• Porosity
• Permeability
• Water/Hydrocarbon
saturation
• Net-to-gross ratio

15. 15
Reservoirs dataset
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 15: Petrophysical datas about the five oil fields concidered

16. 16THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Reservoirs dataset
Fig. 16: Petrophysical datas about the five oil fields concidered

17. 17
Graphical explanation
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014 Fig. 17 Graphical representation of the petrophysical
parameters

18. 18
Graphical explanation
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 18) Comparison of the petrophysical values in the different oil fields

19. 19
Oil chemical features
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Light oil:
• Waxy and parafine based
(5-20%)
• API gravity: 30-40°
Heavy oil:
• API gravity: 8-20°
Niger Delta oil:
• Light oil 85%
• Heavy oil 15 %
Fig. 19) Oil properties

20. 20THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
References
• 1) Wikipedia.org
• 2) http://education.randmacnally.com/
• 3) Google earth
• 4) modified after Galloway W., 1975
• 5)+6) Michele W. L. et al., 1999
• 7)
http://aapgbull.geoscienceworld.org/content/89/6/753/F2.large
.jpg
• 8) modified after USGS
• 9) modified after
http://aapgbull.geoscienceworld.org/content/89/6/753/F2.large
.jpg
• 10) modified after Opara, A. I. et al, 2013
• 11) modified after USGS
• 12) modified after USGS and Whiteman, 1982
• 14) modified after Google earth
• 19) modified after USGS
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