Presentation on theme: "PETROX 2005 Group 1 Morten Lorentzen Ole Jørgen Birkenes Olumide Gbadamosi Huijuan Yu Wijaya Zein."— Presentation transcript:
PETROX 2005 Group 1 Morten Lorentzen Ole Jørgen Birkenes Olumide Gbadamosi Huijuan Yu Wijaya Zein
Wessex Basin Includes the largest known onshore oilfield in W-Europe Preservation of oil-accumulations originally sited in Mesozoic tilted fault-blocks.
Key elements in petroleum geology Source Reservoir Seal Trap Timing Maturation Migration
Source Rock Features in West Cliff Lyme Regis. Marine environment (grey colour). Early Jurassic age. Organic sedimentary deposits which forms the hydrocarbon under right conditions. Laminated shale deposit with many fossils. Low oxygen environment. 6% organic contents Organic type: Kerogen II Dips at 2 degrees to the East. Limestone (wackestone) Black Shale (mudstone) Limestone (wackestone) Black Shale (mudstone)
Geological Log Interpretation For WestCliff source rock Limestone, porosity :5-10% Shale, porosity :2%
Sherwood sandstone Triassic Colour High porosity Dip,5-10 deg East Fault
Sandstone with thin shalelayers Porosity between 30-40%