NAME

     psifilt3 - applies a  hydrostatic  filter  to  the  pressure
     dataset.

SYNOPSIS

     psifilt3 [-N ntap] [-O otap] [-nhg nhg] [-e e] [-ns ns] [-ne
     ne]  [-rs rs] [-nhg nhg] [-dz dz] [-mask mask] [-met] [-eng]
     [-V] [-?]  [-h]

DESCRIPTION

     psifilt3 applies a hydrostatic filter to a pressure  dataset
     (in PSI units NOT gradient, PPG units)

     The filter rule is: pressure must increase with depth  at  a
     rate faster than the fluid gradient specified in the command
     line.

     You can write either the filtered pressure data, or a filter
     mask  (with  the -mask option). The mask is simply a dataset
     with a sample value of 1 at depths where the  pressure  data
     would  have  been filtered, and a sample value of 0 where no
     filtering was required.

     NOTE: psifilt will process datasets as if they were a single
     n-trace record; if the data is not in this form going in, it
     will be coming out!

  Command line arguments
     -Nntap
          Enter the name of the input dataset.

     -Ootap
          Enter the name of the output dataset.

     -s s Enter the start time (default first samp).

     -e e Enter the end time (default last sample).

     -ns ns
          Enter the first trace (default 1).

     -ne ne
          Enter the last trace (default last trace).

     -nhg nhg
          Enter the hydrostatic gradient.

     -dz dz
          Enter the depth sample interval.

     -mask mask
          Enter this option to output the filter mask instead  of
          the data.

     -met If this flag is present on the command  line,  it  will
          indicate  that  the  depth  sample  rate from the input
          overburden gradient dataset is in meters/second.

     -eng If this flag is present on the command  line,  it  will
          indicate  that  the  depth  sample  rate from the input
          overburden gradient dataset is in feet/second.

          Note:  Units must be specified on the command line.

     -V   Enter the command line argument '-V' to get  additional
          printout.

     -?   Enter this (or '-?' if you are running in  c-shell)  to
          get  online  help.   The  program  will terminate after
          printing this.

     -h   Enter this option to get online help.  The program will
          terminate after printing this.

SEE ALSO

     pptrnehz, ppetn, ppg2psi, psi2ppg, ppfilt,  psifilt3,  ptop,
     fillhdr, gradfilt, mshowray

BUGS

     None known.

AUTHORS

     N. D. Whitmore, Jr., Mary Ann Thornton, M. L. Albertin.

COPYRIGHT

     copyright 2001, Amoco Production Company
               All Rights Reserved
          an affiliate of BP America Inc.