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									     AOA Geophysics Inc
    Integrity Oil Services
Specialists in Applied Geophysics




           Petrotech 2007
             Seismic Applications Experience



   2D/3D Oil & Gas High Definition Seismic Surveys (Land and Marine)
   Crosshole Seismic Imaging of Geologic Structure
   Downhole and Near Surface Velocity (LVL) Surveys
   2D and 3D VSP Imaging
   P and S Wave Seismic Tomography
   Soil and Rock Modulus Characterization
   Dam Seismic Integrity Investigations (Microseismic Zonation)
   Hydro-Geologic Studies and Groundwater Exploration
   Mine and Tunnel Site Investigation




                              Petrotech 2007
Basic Seismic Methods

                          Common Seismic Applications:
                           P and S wave velocity tomography
                            for continuous profiling of
                            stratigraphic and structural
                            delineation
                           Delineation of shallow faults,
                            subsidence zones, voids, fracture
                            zones.
                           Mapping depth to bedrock, geologic
                            formation thickness.
                           2D/3D surveys for minerals, shallow
                            oil and gas exploration.




                  Petrotech 2007
Seismic Tomography
Critical Information for Site Characterization

                                                               Alluvial Soil
                                                               V=1400 ft/s (450 m/s)


                                                               Severely weathered and
                                                               dissolved Sandstone
                                                               V=3500 ft/s (1600 m/s)


                                                               Fractured and weathered
                                                               Sandstone and Carbonate
                                                               Rock
                                                               V=6000 ft/s (2000 m/s)




  Seismic tomography is used to map and characterize near surface
  low velocity geologic features.



                                  Petrotech 2007
P and S Wave Seismic Tomography
                                                                       P-Wave Tomography Profile
                                                                                                                                                                   10700
                                                                                                                                                                   10100
                 0
                                                                                                                                                                   9500
                -10                                                                                                                                                8900

                -20                                                                                                                                                8300




                                                                                                                                                                             P-Wave Velocity (ft/s)
                                                                                                                                                                   7700
                -30
                                                                                                                                                                   7100
  Depth (ft)




                -40
                                                                                                                                                                   6500
                -50                                                                                                                                                5900

                -60                                                                                                                                                5300
                                                                                                                                                                   4700
                -70
                                                                                                                                                                   4100
                -80
                                                                                                                                                                   3500
                -90                                                                                                                                                2900

               -100                                                                                                                                                2300
                      0   10   20   30   40   50   60   70   80   90     100   110   120   130   140   150   160   170   180   190   200   210   220   230   240   1700
                                                                          Horizontal Distance (ft)                                                                 1100




                                                                       S-Wave Tomography Profile
                                                                                                                                                                   6260
                                                                                                                                                                   5900
                  0                                                                                                                                                5540
                                                                                                                                                                   5180
                -10
                                                                                                                                                                   4820




                                                                                                                                                                           S-Wave Velocity (ft/s)
                -20
                                                                                                                                                                   4460
                -30                                                                                                                                                4100
  Depth (ft)




                -40                                                                                                                                                3740

                -50                                                                                                                                                3380
                                                                                                                                                                   3020
                -60
                                                                                                                                                                   2660
                -70                                                                                                                                                2300
                -80                                                                                                                                                1940

                -90                                                                                                                                                1580
                                                                                                                                                                   1220
               -100
                      0   10   20   30   40   50   60   70   80   90     100   110   120   130   140   150   160   170   180   190   200   210   220   230   240   860
                                                                                                                                                                   500
                                                                          Horizontal Distance (ft)


  Combined P and S wave tomography sections showing geologic
  structure derived from horizontal and vertical 2-D velocity mapping.

                                                                          Petrotech 2007
Shallow Oil & Gas and Minerals Exploration




Application of Accelerated
Weight Drop (AWD)
seismic energy source is
used on high resolution
2D/3D seismic surveys to
map shallow minerals, coal
seams, stratigraphic gas
traps, faults……and more.



                             Petrotech 2007
3D Seismic Survey Planning
 30m x 60m Source/Receiver Grid Patch

 Number of Receiver Lines               : 10
 Number of Source Lines                 : 18
 Number of Channels/Line                : 20
 Total Number of Channels               : 200
 Number of Source Pts/Line              : 20
 Total Number of Source Pts             : 360
 Receiver Line Interval:                : 60 m
 Source Line Interval:                  : 30 m
 Geophone Group Interval                : 30 m
 Bin Size                               : 15 x 15 m
 Patch Area                             : 0.3078 sq
 km




Typical high resolution 3D
survey uses small patch
design and high density CDP
coverage to maximize
subsurface fold.
AWD application minimizes
receiver counts and
maximizes source points
                                                 Petrotech 2007
3D Patch Fold Chart

High density 3D CDP
bin coverage produces
high fold.
Higher CDP spatial
sampling gives high
seismic definition.
High field production
with accelerate weight
drop (AWD) allows
increase of shot points
and reduction of
receiver positions.




                          Petrotech 2007
 Deep High Definition Seismic

Difficult seismic
imaging requires
special processing
applications.
Pre-stack depth
migration with
dynamic near
surface static
correction is used
to resolve deep
geologic structure.




                      Petrotech 2007
Marine High Definition Seismic
High resolution
marine seismic
methods are
used for
geohazard
surveys, and
shallow oil and
gas exploration




                  Petrotech 2007
    AOA and Integrity Oil Services Combined
             Geophysical Services
   Geophysical and Geologic Consulting for Seismic Methods
   Site Studies and Evaluation for Survey Planning
   Comprehensive Survey Design, Planning, and Logistics
    Support
   Seismic Data Acquisition
   Seismic Data Processing, Analysis, and Interpretation




                           Petrotech 2007
AOA and Integrity Oil Services Contacts
Finn B. Michelsen, PG                               Arindom Ganguly
Director of Applied Geophysics                      Managing Director
AOA Geophysics, Inc.                                Integrity Oil Services
2500 Tanglewilde Ave.                               A651, Sushant Lok, Phase I
Suite 120                                           Guraon, Haryana 122009
Houston, TX 77063                                   India
Office – (713) 532-2624                             Office – (+91) 124 2577476
Cell – (832) 366-4168                               Cell – (+91) 98 9952 6266
Fax – (713) 532-6572                                Fax – (+91) 124 2577475
finn.michelsen@aoageophysics.com                    Arindom.ganguly@integrity.net.in




                                   Petrotech 2007

								
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