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BOREHOLE
SEISMIC
IMAGING
LEADING THE WAY IN ADVANCED BOREHOLE SEISMIC IMAGING: OVER A CENTURY OF EXPERTISE AND INNOVATION
Paulsson has over 100 years of combined experience in advanced borehole seismic design acquisition and processing. Paulsson has developed proprietary Borehole Seismic Imaging Technologies (BSIT) thus expanding the VSP concept to true 3D/4D high resolution imaging. The BSIT-VSP™ includes deploying, recording, processing and interpretation of 3D/4D survey data using 160 level 3C, 8,000 feet long arrays for enhanced reservoir characterization and monitoring.
REVOLUTIONIZING SUBSURFACE IMAGING: PAULSSON’S 3D BSIT-VSP™ TECHNOLOGY DELIVERS UNMATCHED PRECISION AND RESOLUTION


Paulsson, a world record holder for the largest 3D BSIT-VSP™, has conducted over 70 3D BSIT-VSPs™ across three continents. Paulsson has recorded 6 timelapse 3D/4D BSIT-VSPs™ of CO2, water and steam injections.
FROM START TO FINISH: PAULSSON DELIVERS RESULTS
Paulsson’s comprehensive approach to borehole seismic surveying combines cutting-edge technology, meticulous design, and precision execution to deliver unparalleled subsurface insights. From advanced applications like imaging thin reservoirs, monitoring CO2 injections, and detecting bypassed oil and gas, to detailed survey design and simulation, Paulsson ensures that every project is optimized for success.
The use of diverse active and passive sources, coupled with state-of-the-art data processing techniques such as wavefield separation, migration, and velocity modeling, provides clients with highly accurate and actionable results. This end-to-end workflow underscores Paulsson’s commitment to excellence, empowering industries to make informed decisions and maximize resource potential with confidence.

END-TO-END SOLUTIONS:
FROM SURVEY DESIGN TO INTERPRETATION EXCELLENCE
Applications
Paulsson’s 3D BSIT-VSP™ has been used for:
• Imaging Continuity of Thin Oil Resevoirs
• Location and Direction of Oil Reservoir Faults
• Imaging the Location of Bypassed Oil & Gas
• Imaging and Monitoring of Steam Enhanced Oil
Recovery (EOR)
• Aerial Distribution of CO2 Around the Injection Well
• Imaging and Monitoring of the Injected CO2 for
EOR
• Imaging of Metal Bearing Formations
Design
Paulsson designs and models each 3D/4D BSIT-VSP survey:
• Collect existing well and surface seismic data to
build a model.
• Build a 3D structural, stratigraphic, and velocity
model.
• Perform 1st step numerical simulation to generate
synthetic data.
• Use 3D synthetic seismic data for 3D imaging.
• Analyze results to optimize acquisition parameters
• Perform 2nd (3rd etc) step numerical simulation to
generate synthetic data based on results from 1st
step.


Acquisition
Active Sources:
• Surface Seismic full sized VibroSeis Vibrators
• Surface Seismic MiniVibs VibroSeis Vibrators
• Borehole Seismic 3C VibroSeis Vibrators
• Marine Airguns
• Marine Airgun Clusters
• Dynamite
Passive Sources:
• Earthquake monitoring
• Micro Seismic Monitoring CO2 injection for EOR &
CCS
• Micro Seismic Monitoring of Geothermal
Reservoirs
• Sinkhole Monitoring
• Geotechnical Monitoring
Processing
• Cross correlate the data if vibrators are used
• Stack the data
• Filter and delete bad traces
• Pick 1st arrival
• Build a velocity model
• Seismic source estimation
• Deconvolution
• 3Component trace rotation
• Wavefield separation
• Migration and Imaging
• Kirchoff Migration
• Wave equation Migration
• Reverse Time Migration
• Update velocity model and do a second pass
migration


Interpretation
• Paulsson 3D BSIT-VSP generates true depth
images
• Paulsson’s 3D BSIT-VSP™ technology achieves
5 to 10 times the resolution of surface seismic.
• Paulsson’s 3D BSIT-VSP™ technology achieves
thousands of times the volumetric coverage of
well logs
• High resolution of geological and reservoir
structures
• High resolution of faults
• High resolution of thin beds
• High resolution of bed terminations
• Gas vs Oil vs water
• CO2 distribution
PAULSSON IN THE FIELD
Alaska
2002
Large 3D VSP Survey for Anadarko/DOE using an 80 level 3C borehole seismic array on the North Slope, Alaska
