ahmilb@houu64$bhpmodel

 BHPMODEL - Make BHPIO Time and Depth Models                          

 bhpmodel combines depths from a BHPIO horizon dataset with            

 velocity and other information from an ASCII model description       

 file to build BHPIO horizon-based time and depth model datasets.     

 USAGE: bhpmodel mfile=                                                

 Required Parameters:                                                 

   mfile=             Location of ASCII model description (see below) 

 Optional Parameters:                                                  

   null=-999.25            null value. The horizon data may contain   

                           null values where no picks were made       

   hfile=horizons          BHPIO dataset containing model depths      

   tmodel=time_model       BHPIO output time model                    

   dmodel=depth_model      BHPIO output depth model                   

   pathlist=time_model.dat BHPIO pathlist file used to locate datasets

   verbose=0               debug print                                 

 Trace Header Usage:                                                  

 ASCII Model Description Example:                                     

shift event   layer   name     facies   N/G     vp      vs      rho     vp*rho

250     1       1    top_cover  2       65      2674    1150    2.20    5873

250     2       2    slope1     2       65      2674    1150    2.20    5873

250     3       3    drape1     4       15      2793    1217    2.29    6400

250     4       4    slope2     2       65      2674    1150    2.20    5873

250     5       5    slope3     2       45      2718    1174    2.23    6073

250     6       6    slope4     2       30      2754    1195    2.26    6232

250     7       7    channel1   3       100     2607    1113    2.13    5552

250     8       8    slope5     2       30      2754    1195    2.26    6232

250     9       9    slope6     2       65      2674    1150    2.20    5873

250     10      10   debri1     5       0       2977    1303    2.44    7252

250     11      11   slope7     2       65      2674    1150    2.20    5873

250     12      12   drape2     4       15      2793    1217    2.29    6400

250     13      13   background 1       3       2827    1236    2.31    6542

250     14      bottom                                                     

        avgvel = 2760                                                      

 Rules for Constructing Model Descriptions:                           

Column separators must be spaces or tabs.                             

First non-blank line in file is assumed to be heading line.           

Each column heading is limited to one word, e.g.                      

time-shift or time_shift, or shift, but not time shift                

Columns may be in any order

Certain columns are required:                                         

  Keyword         Contents                                            

  -------         --------                                             

  shift           time-shift each layer                               

  event           event number                                        

  layer           layer number                                        

  name            layer name                                           

  vp              compressional velocity                              

  rho             density                                             

Headings containing the above strings in any combination of upper and 

 lower case are required to construct model and synthetic datasets.   

Any other headings in the model file are used as property names and   

 their respective column contents are loaded into the time and depth models.

A line with bottom anywhere on the line is bottom-model event          

The bottom-model record maust have information in fixed columns as follows:

 Column 1 = time-shift, Column 2 = event-number, Column 3 = bottom    

First non-blank line after bottom is parsed for:                      

  string = value, and value is used as vp for top layer