Transcript Dallas v1 5601.28 KB - Dallas Geophysical Society

Society of Exploration Geophysicists
The international society of applied geophysics
Dallas
2010
By Steve Hill
SEG President
World headquarters: Tulsa, Oklahoma, U.S.A.
SEG Priorities
• Serve a global membership
• Accelerate innovation
• Inspire the geoscientists of tomorrow
SEG Principles/Values
Geophysics to the core.
Border free.
Member-driven.
Level playing field.
Investing in future: Technology & Students.
Running a business.
May Executive Committee Meeting
1.Revision to SEG Constitution and Bylaws.
2.Budget (~$15,000,000)
3.Executive Director Interviews
4.Increase Real Estate Investment
Constitution & Bylaws Challenge
Articles of Incorporation
SEG governed by Executive Committee & Constitution
Constitution
SEG governed by Council
Informed Decision Challenge
New-hire Executive Committee
SEG Business: ~$15,000,000/year
Proposed Solution
15 – 25 Member Board
2-3 year overlapping terms
Executive Committee
2-3 year overlapping
terms
Image the Earth we will touch.
Geophysics Bright Spots
Geophysics Bright Spots
Geophysics Bright Spots
Geophysics Bright Spots
Geophysics Bright Spots?
Best articles?
Geophysics Bright Spots
Understandable?
Real data?
Good graphic?
Succinct concept?
Yes
Seismic Interferometry
California earthquake monitoring stations.
Real energy source
= Ocean waves
Virtual energy sources
= Each receiver location
Eric Larose, et al., Correlation of random
wavefields: an interdisciplinary review
Seismic Interferometry
Tomographic, virtual-source,
Rayleigh-wave velocity inversion
Eric Larose, et al., Correlation of random
wavefields: an interdisciplinary review
Seismic Interferometry
Virtual-source imaging below
Complex overburden.
Depth
Lateral Position
Andrey Bakulin and Rodney Calvert, The
Virtual Source method: theory and case
study
Seismic Interferometry
Time-lapse comparison of migrating
virtual-source, VSP data.
Depth
Lateral Position
Depth
Production-related, differential
compaction across fault.
Andrey Bakulin and Rodney Calvert, The
Virtual Source method: theory and case
study
Image with
downhole S & R
Surface S &
downhole R
using virtual
downhole S.
Model
Mark E. Willis , et al., A novel application of timereversed acoustics: Salt dome flank imaging using walk
away VSP surveys
Charging a Hydrocarbon Reservoir
“Charges” reservoir.
Depth
Downward electrical impulse.
Longer delay times
imply hydrocarbons.
Charge relaxation time
Lateral Position
Sofia Davydycheva, Nikolai Rykhlinski, and
Peter Legeido, Electrical prospecting method
for hydrocarbon search using the induced
polarization effect
Automatic Fault Picking
Adjacent trace dissimilarity reveals faults.
Israel Cohen , Nicholas Coult and Anthony A.
Vassiliou, Detection and Extraction of Fault
Surfaces in 3-D Seismic Data
Prestack Inversion for Impedance
Gulf of Mexico, deep-water data.
Hydrocarbons decrease impedance.
Seismic data inversion for impedance reveals lateral extent of reservoir.
Inversion ties well.
Arturo Contreras , Carlos Torres-Verdín, and Tim Fasnacht, AVA
simultaneous one-dimensional inversion of partially-stacked seismic
amplitude data for the spatial delineation of lithology and fluid
units of deepwater hydrocarbon reservoirs in the central Gulf of
Mexico
Ground-penetrating Radar for Archeology
Depth model
Goal: Find 1,500-year-old buried walls
Solution: Ground-penetrating radar.
Model data
Clay walls in sandy soil.
Digging confirmed structures.
Real data
“Joint geoelectrical and GPR prospecting at the
ancient Palo Blanco archaeological site, NW
Argentina, Martino et al .)
Unstable Mountain Slope
Mountain slope above town
of Randa in Matter Valley
(Switzerland).
Fracturing lowers P-wave velocity.
Velocity map from 3D, P-wave,
tomographic inversion.
Found larger lateral extent of rock
moving 1 – 2 cm/year
towards town.
“Characterizing an unstable mountain slope using
shallow 2- and 3-D seismic tomography”, Heincke et al
Hydraulic Fracturing Monitoring
Hydraulic fracturing produces microseismic events.
Record events at 3-C geophones.
Triangulate to estimate event origin
Estimate direction of frac job.
Fast location of seismicity: a migration-type
approach with application to hydraulic
fracturing data, by Susanne Rentsch et al.)
Downhole, 3-C geophones
Electromagnetic-to-seismic Conversion
Apply surface voltage.
Contrast in subsurface electrical
properties due to hydrocarbon-induced
resistivity change creates discontinuous
electric field.
Induces pressure gradient in rock,
creating P-wave, revealing
hydrocarbons.
“Field tests of electroseismic hydrocarbon
detection”, A. H. Thompson et a l.)
Gravity Inversion for Basement
Author’s inversion for basement from gravity data, including
interpretation of salt location.
“2D gravity inversion of a complex interface in the
presence of interfering sources” by Silva Dias et al
3D Frequency Display
Fit series of Ricker wavelets,
subtracting each in turn.
Ricker wavelets provide
frequency information.
Frequency (color)
proportional to thickness.
Coherence attribute defines
edges (grey).
Instantaneous spectral attributes to detect channels” by Liu and Marfurt
Acoustic Logging while Drilling
Record interface reflections
as drill bit approaches
interface.
Useful for guiding drill bit
within reservoir interval.
“Processing array acoustic logging data to image near-borehole
geological structures” by Tang et al.
Contaminant Location
Grey = presumed creosote location by other techniques.
Goal: Find the creosote in North Carolina.
Creosote sunk through water column until hits low-permeability zone.
Creosote has lower frequency-dependent absorption of ground-penetrating radar.
“Frequency dependent attenuation analysis of groundpenetrating radar data” by John H. Bradford .
Image Gas Storage
Depth
Lateral Position
Time-varying current between two electrodes.
Measure time-varying voltage away from source electrodes
Red = High resistivity gas.
Black = Known top gas.
Invert for resistivity.
“Multi-Transient Electromagnetic Demonstration Survey in
France” by Anton Ziolkowski et al.
Underwater Rail Tunnel
3-C onshore passive seismic.
Sources are 150 earthquake events.
Inverted for P-wave velocity.
Imaged high-velocity evaporite under strait.
Drilling confirmed its existence.
High-velocity evaporite
Multi-azimuth Acquisition
3D, Gulf of Mexico density model used to create simulated acquisition traces.
“Using 3D finite-difference modeling to design wide-azimuth
surveys for improved subsalt imaging” by Carl J. Regone.
Multi-azimuth Acquisition
3D, prestack depth migration of synthetic, narrow-azimuth data.
“Using 3D finite-difference modeling to design wide-azimuth
surveys for improved subsalt imaging” by Carl J. Regone
Multi-azimuth Acquisition
3D, prestack depth migration of synthetic, wide-azimuth data.
“Using 3D finite-difference modeling to design wide-azimuth
surveys for improved subsalt imaging” by Carl J. Regone
Image the Earth we will touch.