Gravity & Seismic Surveys

(Geol 7900.5- Fall 1998)

*

*from http://www.lacosteromberg.com



Department of Geology and Geophysics
Louisiana State University

 

Lectures: 4-5.30 p.m. Room E202

Labs: 4-7.00 p.m. Subsurface Laboratory (E217)

Howe-Russell Complex

24 meetings


Gravity Surveys

12 x 1.5 lectures and labs

2 days of field work (2 weekdays or 2 weekend days)


Seismic processing

5 lectures

7 x 1.5 hr lab exercises


Instructor: Dr. Juan M. Lorenzo



Textbook: Encyclopedic Dictionary of Geophysics by R.E. Sheriff

(recommended but not required)

LECTURES



AUGUST



M. 31 Fundamentals- A relative measure of gravity


SEPTEMBER 


W. 2

M. 7 Labor Day-no class 

W. 9 

M 14 

W 16

 M 21, W 23 no classes

M 28

W 30

Free-Air Correction
 
 

Bouguer Correction and Terrain Corrections

Tidal effects

Instrument Drift
 
 

Reduction of Data

Reduction of Data



OCTOBER


M 5
 

W 7 
 

M 12

W 14 

M 19
 

W 21

M 26

W 28
 

29-30 - Fall Holiday

Simple Models -edge effects- Lab
 

Modeling Field data
 

Seismic Acquisition Introductory Video

P and S waves, Snell's Law

CMP method, ray paths
 
 

NMO, stacking, 

Sea-floor multiples

Reflection coefficients



NOVEMBER 


M 2 

W 4 
 
 
 
 
 

M 9 

W 11 

M.16 
 

W 18 
 
 

M 23
 
 

W 25

26 - 29 Thanksgiving holiday

M 30

F-k filtering Lab
 

Lab- V rms,Vint, V semblance Constant velocity stacks. Semblance Analysis, exampleSemblance Plot
 
 

F-k filtering 
 

Principles of Migration -Lecture

Principles of Migration -Lab
 
 

Review
 
 

Lab 3 on bandpass Filtering and Spectral Analysis Bandpass filtering, Notch filters 

Vertical Resolution, Nyquist frequency

 



DECEMBER 


M 2

Dec. -

Lab 4 on seismic processing (ProMAX) 

Take-home exam

Evaluation
 

Last modified on November 23, 1998 by Juan M. Lorenzo