Transcript Seismic Reflection Data Processing and Interpretation

Seismic Reflection Data Processing
and Interpretation
Lecturer Title:
Aliasing
A Workshop in Cairo
28 Oct. – 9 Nov. 2006
Cairo University, Egypt
Dr. Sherif Mohamed Hanafy
Concept of Aliasing
Original Signal
12
8
4
Time
0
-4
-8
-12
Red crosses represents
digitizing points
Concept of Aliasing
Digitizing the signal in different time
interval causes loosing of some data.
12
8
4
0
-4
-8
-12
Time
Concept of Aliasing
Another example
Subtract mean (dewow)
This filter acts on each trace independently. With
this filter a running mean value is calculated for
each value of each trace. This running mean is
subtracted from the central point.
Subtract mean (dewow)
Edit Trace
Time Gain Functions
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AGC
t power
e power
…..
End of this lecture
Thank You for you attention
All examples on this lecture is based on my work