1 EXHIBIT 10.19 MODIFICATION AND RATIFICATION OF LEASE This Modification and Ratification of Lease Agreement is made and entered into between Ron Chase dba Chase Properties (Lessor or Landlord) and Eagle Geophysical/Seitel Geophysical (Lessee or...

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                                                                EXHIBIT 10.19


                     MODIFICATION AND RATIFICATION OF LEASE

This Modification and Ratification of Lease Agreement is made and entered into
between Xxx Xxxxx dba Xxxxx Properties (Lessor or Landlord) and Eagle
Geophysical/Seitel Geophysical (Lessee or Tenant) for and in consideration of
One Dollar ($1.00) and other good and valuable consideration, receipt of which
is hereby acknowledge.

                                  WITNESSETH:

         I, Lessor and Lessee hereby confirm and ratify, except as modified
below, all of the terms, conditions and covenants in that certain written Lease
Agreement dated March 10, 1994, between Lessor and Lessee, for the rental of
7500 square feet at the following location:  0000 X.X. 00, Xxxxxxxxx, Xxxx Xxxx
Xxxxxx, Xxxxx.

         1.      The term of the lease shall be extended 24 months, commencing
on the 5th day of April, 1996 and ending on the 14th day of April, 1998.

         2.      The monthly rental rate shall be increased to $2,100.00.

         3.      All other terms and conditions shall remain in effect.

         SIGNED at Fort Worth, Texas, this 24th day of April, 1996.
                                        
                                        LESSOR:
                                        
                                        
                                        CHASE PROPERTIES
                                        
                                        
                                        By: /s/ Xxxxxx Xxxxx
                                        Name: Xxxxxx Xxxxx
                                        Title:  Owner
                                        
                                        
                                        LESSEE:
                                        
                                        EAGLE GEOPHYSICAL/SEITEL
                                        GEOPHYSICAL
                                        
                                        
                                        By: /s/ Xxx X. Xxxxxxxxx
                                        Title:  President