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Isle of Man Petroleum Geology. Prospectivity and Future Opportunities
Stavros Arsenikos1, Dave Roberts2, Darren Jones1, Ken Milne2, Ian Andrews1
1 British Geological Survey, UK 2 Department of Economic Development, Isle of Man
• British crown dependency
• Territorial Seas up to the 12 mile limit
(approx. 2.5k square miles of sea bed)
• Ownership of all minerals and
hydrocarbons located within Manx
territory is vested in the Isle of Man
Government
Overview of the Isle of Man
Overview of the Isle of Man
Our Aims :
Provide fiscal framework which recognises
the issues faced by the explorers and
anticipate arrangements which are fair to
both the extractor and the owner
Rejuvenate and promote exploration of
hydrocarbons in Island waters
Regional Setting
Available Dataset
• More than 400 2D
seismic profiles
cutting across Isle of
Man territorial seas
Available Dataset
• More than 400 2D
seismic profiles
cutting across Isle of
Man territorial seas
• Publicly available
reprocessed seismic
profiles as part of the
OGA Government
Survey initiative.
Available Dataset
• More than 400 2D
seismic profiles
cutting across Isle of
Man territorial seas
• Publicly available
reprocessed seismic
profiles as part of the
OGA Government
Survey initiative.
• 3 Wells in Isle of Man
Territorial Seas, more
than 200 in proximity,
in the East Irish Sea
Basin.
Regional Structures • Caledonian trends
• Devono-
Carboniferous
extension
• Variscan reactivation
• Triassic Extension
• Jurassic
(Cimmerian)Uplfit
• Jurassic Rift
• Tertiary uplift and
erosion
Inherited structural grain trending NE-SW and NW/SE
Petroleum System
Reservoir – Triassic Ormskirk Sandstone
Reservoir - Permian Collyhurst Sandstone
Seal – Permian St Bees Evaporites
Seal – Triassic Mercia Mudstone Group
Source rock – Namurian basinal shales
Petroleum System
Reservoir
• Triassic Sherwood
Sandstone Group
in places too shallow,
water-bearing
• Permian Collyhurst
Sandstone
variable reservoir
properties
Petroleum System
Seal
• Triassic Mercia
Mudstone – regional
seal
• Permian St Bees
Evaporite
?
Petroleum System
Source Rock
• Namurian Basinal
Facies
Initial geometry and
distribution
After Floodpage et al. 2001
Well Correlation
1
2
3 2
3
1
Prospect analysis in the Lagman Basin
The biggest challenge BP faced back in 1995 :
low permeability values
Prospect analysis in the Lagman Basin
Then…
The permeability of the Collyhurst sandstone would be better
updip
The fault damage zone wouldn’t affect the formation (diagenetic
effects)
The GWC zone would be deeper, thus adding more volume to the
reservoir and better porosity/permeability values
What if ….?
The well wasn’t drilled in the
downthrown part
but instead on the footwall
(BP’s Prospect A) ?
Prospect analysis in the Lagman Basin
Prospect analysis in the Lagman Basin
Discovery ‘D’
P50 90 BCF Prospect Model ‘A’
P50 120 BCF
FISCAL REGIME OF THE ISLE OF MAN
• Fiscal Arrangements to be determined
• Acreage Rental from £15/km2
• No restrictions on purchase of land and property
• Double tax treaty with the UK
FISCAL REGIME OF THE ISLE OF MAN
The 2nd Offshore Licensing Round of the Isle of Man will
coincide with the 30th Offshore Licensing Round in the UK
Any questions? Come and visit us at our booth Stand #38
Thank you