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GENERAL GEOLOGY KIMMERIDGE BAY

GENERAL GEOLOGY KIMMERIDGE BAY. Group 1: Ole Jørgen Morten Olumide Yu Huijuan Zein Wijaya. Kimmeridge Oil Field. Discovered in 1959 6 wells drilled,1 producing 80bbl/d Fractured Cornbrash limestone Total prod until today:3,5 mill bbl. Structure of Kimmeridge oilfield.

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GENERAL GEOLOGY KIMMERIDGE BAY

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  1. GENERAL GEOLOGYKIMMERIDGE BAY Group 1: Ole Jørgen Morten Olumide Yu Huijuan Zein Wijaya

  2. Kimmeridge Oil Field • Discovered in 1959 • 6 wells drilled,1 producing 80bbl/d • Fractured Cornbrash limestone • Total prod until today:3,5 mill bbl.

  3. Structure of Kimmeridge oilfield • Purbeck Reversed fault • Fault trend is East-West direction. • Trap is faulted anticline

  4. Structure Evolution of Kimmeridge oilfield

  5. Kimmeridge clay • Immature source rock in Kimmeridge Bay • Kimmeridge clay is black shale with 30-40% TOC • Main source rock in the North Sea

  6. ???? ASK ANDY……

  7. PETROX 2005 • Group 1 • Morten Lorentzen • Ole Jørgen Birkenes • Olumide Gbadamosi • Huijuan Yu • Wijaya Zein

  8. Wessex Basin Includes the largest known onshore oilfield in W-Europe Preservation of oil-accumulations originally sited in Mesozoic tilted fault-blocks.

  9. Key elements in petroleum geology • Source • Reservoir • Seal • Trap • Timing • Maturation • Migration

  10. 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. Black Shale (mudstone) Limestone (wackestone) Black Shale (mudstone) Limestone (wackestone)

  11. Geological Log Interpretation For WestCliff source rock Shale, porosity :2% Limestone, porosity :5-10%

  12. Sherwood sandstone • Triassic • Colour • High porosity • Dip,5-10 deg East • Fault

  13. Sandstone with thin shalelayers Porosity between 30-40%

  14. Oil Migration

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