305-pp1 - 1 GY 305: Geophysics GY 305: Geophysics Lecture...

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Unformatted text preview: 1 GY 305: Geophysics GY 305: Geophysics Lecture 1: Lecture 1: Introduction to Haywick Introduction to Haywick s Version of Geophysics s Version of Geophysics UNIVERSITY OF SOUTH ALABAMA Geophysics Introductions, class policy etc. Introduction to geophysics Start of Wave theory (properties of rocks) Today Today s Agenda s Agenda Introductions The Syllabus Haywicks Stuff 1) Wave theory 2) Petroleum 3) Electric Logs 4) Seismology 5) Sequence Stratigraphy Assessment: 50% of your grade comes from Haywicks part, 50% from Connors The Syllabus Lecture 1: Geophysics Lecture 1: Geophysics 2 Geophysical analysis is done when 1) you cant get direct access to the rocks 2) you want to model a large area quickly 3) you know what you are looking for Geophysics Geophysics Geophysical analysis is done when 1) you cant get direct access to the rocks 2) you want to model a large area quickly 3) you know what you are looking for but every geophysical technique only estimates geology (lots of interpretation) Geophysics Geophysics There are 2 scales of geophysical analysis: 1) small-scale (single well; shallow penetration seismic etc.) Geophysics Geophysics ht p:/ www.spwla.org/library_info/glossary/reference/glossd/images/glsp32f1.gif htp:/www.encapgroup.com/driling/images/oil-driling-wel.jpg There are 2 scales of geophysical analysis: 2) large-scale (basin wide surveys) Geophysics Geophysics ht p:/ www.seadolby.com/images/the-seafarer-images/seismic-boat.jpg ht p:/ www.ucmp.berkeley.edu/fosrec/images/ONeil Fig8.jpg Proposed well Ultimately what geophysics do is Ultimately what geophysics do is to measure the intensity of waves to measure the intensity of waves or force or force fields as they pass fields as they pass through geological materials. through geological materials. They are looking for unpredicted They are looking for unpredicted variations or deviations from variations or deviations from normal (i.e., normal (i.e., anomalies anomalies ) Geophysics Geophysics ht p:/ miac.uqac.ca/MIAC/grav-1.jpg Gravity map Yucatan, Mexico Geological interpretations are Geological interpretations are made on the basis of these made on the basis of these anomalies anomalies Geophysics Geophysics ht p:/ www.geos.ed.ac.uk/homes/jru/Silverpitseismic.jpg An incredible 3D seismic line across a structurally complex area of the North Sea (once thought to be an impact site, now thought to be a collapse structure) 3 So what kind of geophysics is So what kind of geophysics is there? there?...
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This note was uploaded on 02/05/2012 for the course GLY 305 taught by Professor Staff during the Fall '10 term at S. Alabama.

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305-pp1 - 1 GY 305: Geophysics GY 305: Geophysics Lecture...

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