Isle of Man Petroleum Geology. Prospectivity and Future - - PowerPoint PPT Presentation

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

• ur booth

Stand #38

Thank you