Sedimentary basins part one
Download
1 / 23

Sedimentary Basins Part One - PowerPoint PPT Presentation


  • 280 Views
  • Updated On :

Sedimentary Basins (Part One). What are Sedimentary Basins?. Holes in the ground where sediment accumulates Global distribution: Sub-aerial and submarine. Why are Basins Interesting?. Hydrocarbons: Oil, Gas, Coal Ores & Minerals. Some estimates….

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Sedimentary Basins Part One' - yin


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

What are sedimentary basins l.jpg
What are Sedimentary Basins?

Holes in the ground where sediment accumulates

Global distribution: Sub-aerial and submarine


Slide3 l.jpg

Why are Basins Interesting?

Hydrocarbons:

Oil, Gas, Coal

Ores & Minerals


Slide4 l.jpg

Some estimates…

Liquid hydrocarbon production will peak in

~10 years at 30 Billion Barrels per annum,

declining to ~5 Billion Barrels per annum

by the end of the 21st Century




Slide7 l.jpg

Keeping up Supply: Importance of Technology

1988 and 1995 3D seismic surveys

BP Forties Field:

Monthly Average Oil Production Rate

1973 Year 2003

Technologies:

Seismic Reflection Imaging

Deep Water drilling/production

Finding: Direct hydrocarbon Indicators

Extracting: Mopping up the dregs


Slide8 l.jpg

Peak Oil: Supply Peaks & Declines Smoothly?

Technology buffers decline?



Slide10 l.jpg

Basins form through Tectonic Subsidence

Accommodation Space

Sea-Level Change

Tectonic Uplift / Subsidence


Slide11 l.jpg

World’s Thickest Sediment Accumulations

Thickest sediment accumulations are 15 to 20 km

Tend to form in enclosed basins supplied by major rivers



Probing sedimentary basins l.jpg
Probing Sedimentary Basins

  • Surface sampling and mapping

  • Topography and bathymetry

  • Boreholes (<5 km)

  • Seismic experiments (2D, 3D, 4D)

  • Earthquake analysis

Undeformed basins are subsurface



Slide15 l.jpg

12 km surface sampling / mapping

Seismic Reflection Imaging

Ninian Fault Block, North Sea

vertical exageration x3 to x4


Slide16 l.jpg

Seismic Reflection Imaging Technology surface sampling / mapping


Slide17 l.jpg

Borehole Records surface sampling / mapping

1. Thicknesses

2. Ages

3. Sediment Composition

Reconstruct sediment acccumulation history

Hence reconstruct tectonic subsidence history


Slide18 l.jpg

Stratigraphic Growth surface sampling / mapping


Slide19 l.jpg

Timing of source maturation: surface sampling / mapping

Cumulative Stratigraphy Plot


Slide20 l.jpg

Sediment Loading Correction surface sampling / mapping


Slide21 l.jpg

Tectonic Subsidence Curves surface sampling / mapping


Basin classification process l.jpg
Basin Classification: Process surface sampling / mapping

‘Basin Analysis’, Allen & Allen, Chapter 1


Basin classification this course l.jpg
Basin Classification: This Course surface sampling / mapping

  • Extensional basins (60-70%)

  • Flexural or foreland basins (10-20%)

  • Basins associated with subduction zones

  • Other basin types…


ad