Petrotech 2007 AOA Geophysics Inc Integrity Oil Services Specialists in Applied Geophysics

Petrotech 2007  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 Seismic Applications Experience

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

Petrotech 2007 P and S Wave Seismic Tomography 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 D 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: 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 D 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 Director of Applied Geophysics AOA Geophysics, Inc Tanglewilde Ave. Suite 120 Houston, TX Office – (713) Cell – (832) Fax – (713) Arindom Ganguly Managing Director Integrity Oil Services A651, Sushant Lok, Phase I Guraon, Haryana India Office – (+91) Cell – (+91) Fax – (+91)