Changes

  | part    = Predicting the occurrence of oil and gas traps

  | part    = Predicting the occurrence of oil and gas traps

  | chapter = Interpreting seismic data

  | chapter = Interpreting seismic data

  | frompg  = 12-1

  | frompg  = 12-18

  | topg    = 12-29

  | topg    = 12-18

  | author  = Christopher L. Liner

  | author  = Christopher L. Liner

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch12/ch12.htm

  | link    = http://archives.datapages.com/data/specpubs/beaumont/ch12/ch12.htm

==Example==

==Example==

[[file:interpreting-seismic-data_fig12-8.png|300px|thumb|{{figure number|1}}Sonic log converted to time and velocity. . Copyright: Liner, 1999; courtesy PennWell.]]

[[file:interpreting-seismic-data_fig12-8.png|300px|thumb|{{figure number|1}}Sonic log converted to time and velocity. From Liner;<ref name=Liner1999>Liner, C., 1999, Elements of 3-D Seismology: Tulsa, PennWell.</ref> courtesy PennWell.]]

In [[:file:interpreting-seismic-data_fig12-8.png|Figure 1]], a [[Basic open hole tools#Sonic|sonic]] log has been converted to time and velocity. Note that the time axis on the seismic section and the converted sonic log are linear, while the depth tick marks on the sonic are nonlinear. The geological horizons annotated on the sonic log are located via the depth ticks from picks on other logs ([[Basic open hole tools#Resistivity|electric]], [[Basic open hole tools#Gamma ray|gamma ray]], etc.). It is important to realize that a sonic log never goes to the surface; there is always a gap for the [[surface casing]]. We do not expect time zero on the converted log to fit at time zero on the seismic section. In practice, the log is placed over the seismic section and shifted vertically until we are satisfied with the fit.

In [[:file:interpreting-seismic-data_fig12-8.png|Figure 1]], a [[Basic open hole tools#Sonic|sonic]] log has been converted to time and velocity. Note that the time axis on the seismic section and the converted sonic log are linear, while the depth tick marks on the sonic are nonlinear. The geological horizons annotated on the sonic log are located via the depth ticks from picks on other logs ([[Basic open hole tools#Resistivity|electric]], [[Basic open hole tools#Gamma ray|gamma ray]], etc.). It is important to realize that a sonic log never goes to the surface; there is always a gap for the [[surface casing]]. We do not expect time zero on the converted log to fit at time zero on the seismic section. In practice, the log is placed over the seismic section and shifted vertically until we are satisfied with the fit.

* [[Synthetic seismogram]]

* [[Synthetic seismogram]]

* [[Synthetic seismograms: correlation to other data]]

* [[Synthetic seismograms: correlation to other data]]

==External links==

==External links==

[[Category:Exploring for stratigraphic traps]]

[[Category:Exploring for stratigraphic traps]]

[[Category:Exploring for structural traps]]

[[Category:Exploring for structural traps]]