the niger delta province - petroleum system
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THE NIGER DELTA PROVINCENIGERIA
CRISTIANO ASCOLANI, PHILIPP MESTERS, JEAN-MARC SÖLDNER
PETROLEUM GEOLOGY I – SS 2014
Fig. 1: Satellite picture from Niger delta
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Nigeria: general facts
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
• 9°04'55.80''N8°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
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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
4THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Rifting events
Fig. 5: Rifting events chart through the Cretaceous
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Petroleum deposits
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 6: Map of the Niger delta's petroleum deposits
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Geological overview
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014 Fig. 7: Geological map of Nigeria
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
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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
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THE 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
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Structural pattern
• Mostly, oil occurs intectonical structuresas 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
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Stratigraphy of the Niger Delta
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 12: Stratigraphic column
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Events chart
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 13: Petroleum events chart of the Agbada-Akata-formation
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Reservoir data analysis
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014Fig. 14: Position of the five oil fields
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Reservoir parameters
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
• Porosity• Permeability • Water/Hydrocarbon saturation
• Net-to-gross ratio
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Reservoirs dataset
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 15: Petrophysical datas about the five oil fields concidered
16THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Reservoirs dataset
Fig. 16: Petrophysical datas about the five oil fields concidered
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Graphical explanation
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014 Fig. 17 Graphical representation of the petrophysical parameters
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Graphical explanation
THE NIGER DELTA PROVINCE- PETROLEUM GEOLOGY I – SS 2014
Fig. 18) Comparison of the petrophysical values in the different oil fields
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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
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
THANK YOU FOR YOUR ATTENTION!
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