Sunday, May 3, 2009

apparent dip calculation

Hi Peter,
 
The apparent dip (geologist's use) of a bed in any desired crossection direction can be calculated by:
 
tan a = tan b * sin c   where a is the apparent dip, b is the true dip and c is the angle between the strike of the bed and the direction of the apparent dip.
 
 
.......or use the Schmidt net !
 
Ted
 


bornemann@anchorage.oilfield.slb.com



Folks

Our client wants to use OBMI dips for his seismic velocity modeling. We have a surface seismic line in a certain direction. We also have a dip set representing the bedding - true dip angle and azimuth. 
Does anybody have a little program to calculate the apparent dip for a different (given) azimuth? 

We can do it graphically in StrucView by changing the cross section direction, but we also need the dip values in an ascii file.

Thanks,
Peter