1 / 34

Powered by Rock

Powered by Rock. Earth's Energy Systems. Dr Liam Herringshaw lgh865@hotmail.com. Class 3: Oil & Gas. Origins. Organic matter Burial generates hydrocarbons by 'cracking' Depth/temperature: Oil window (60–120 'C) Gas window (>100 'C). Methane = CH4. Kerogens. Type I – Sapropelic

lethia
Download Presentation

Powered by Rock

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Powered by Rock Earth's Energy Systems Dr Liam Herringshaw lgh865@hotmail.com

  2. Class 3: Oil & Gas

  3. Origins Organic matter Burial generates hydrocarbons by 'cracking' Depth/temperature: • Oil window • (60–120 'C) • Gas window • (>100 'C) Methane = CH4

  4. Kerogens Type I – Sapropelic Cyanobacteria, freshwater algae = oil Type II – Planktonic Mostly marine, mixed oil/gas Type III – Humic Terrestrial plant matter, produces gas

  5. Conventional hydrocarbons

  6. UK Oil & Gas - onshore

  7. UK Oil & Gas - offshore Gas discoveries late 1960s Oilfields 1970s onwards

  8. Your arguments in favour (with reference/s) The case for oil & gas

  9. Your arguments in opposition (with reference/s) The case against oil & gas

  10. The economics of oil Increasingly expensive, increasingly imported

  11. Unconventional hydrocarbons

  12. Britain for shale? (Figure from DECC report)

  13. UK prospects?

  14. UK targets Carboniferous NW England Jurassic SE England

  15. Carboniferous (Image from BGS report)

  16. Jurassic (Image from BGS report) * BGS/DECC currently investigating resources * Durham/Newcastle – new NERC catalyst grant

  17. Fracking seismicity

  18. Does fracking cause earthquakes? Yes Professor Pete Styles, Keele University

  19. Should we be worried? Not really Professor Pete Styles, Keele University

  20. Induced Seismicity Redrawn from Davies et al. (2012)

  21. Mitigation techniques Structural geology: • Understand tectonic history • Avoid unidirectional weaknesses

  22. Does fracking pollute aquifers? From 'Gasland'

  23. Fracture propagation <1% risk of vertical frack >350m 600m minimum safe separation distance Redrawn from Davies et al. (2012)

  24. Fracking fluids?

  25. 4000 holes in Blackpool Lancashire?

  26. Well density Carboniferous • Bowland Shale thicker than US shales • 1300 Tcf resources? • 5% recoverable = 65 Tcf • 2.5-5 Bcf per well • = 13,000-26,000 wells • 10 wells per pad • = 1300-2600 pads But many uncertainties

  27. Well integrity Leakage rate? Is UK well-prepared?

  28. 24 Jan 2013 Consensus? 23 Jan 2013

  29. Resources www.refine.org.uk Research briefs Translations Videos News

  30. Next week: Nuclear FOR – make an argument in favour of nuclear power AGAINST – make an argument against Is nuclear part of our future energy mix?

More Related