we study the state and evolu on of pressure, stress ...€¦ · geofluids co-directors 2013...
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and silt content control permeability, compressibility
Velocity loading and unloading curve
Preparing samples
understand mudrock behavior
• Major current experimental effort is developing ability to measure shear and compressional velocity in mudstones
log and seismic
We characterize geology, pressure,
The Auger Basin is a ‘protected trap’: the shallowest structure is currently leaking; this allows trap integrity at subsidiary structures (Macaroni and Auger).
We use direct measurements of salinity and temperature to
expelling from vents.
Dip image. Red marks oil slick on surface from Radar
Ursa Vent
We are currently working on modeling salt diapirism
• Developing a new geomechanical modeling approach that goes beyond current approaches
Geomechanical modeling of stress around salt at Mad Dog
• Elevated horizontal stresses within basins and in front of the salt: 90% to 110% of the overburden.
stress, and borehole integrity in salt regimes
0
50
100
150
200
250
300
10 100 1000 10000
S-w
ave
Velo
city
(m/s
)
Ver cal Effec ve Stress (kPa)
m = 30.4
m = 21.2
• 13 Graduate Students• 4 Post-docs & Research
• 4 Staff/Technical Support
Jack Germaine
Civil and Environmental Engineering, MIT
Peter FlemingsProfessor, Jackson School of
Geosciences, U.T.
ExperimentalField StudyPoromechanical Modeling
1. Experimental: (~15,000 psi).2. Poromechanical Modeling:
3. Field Study:
Contacts: [email protected], [email protected], [email protected]
Transferring
Online GeoFluids database
Deliverables:
• Online database with experimental results
• Spread sheets, handbooks
Geotechnical Engineers
Example 2: Pore Pressure and Trap Integrity in the Auger Basin
Vert
ical
effe
ctiv
e st
ress
, ’ v
(MPa
)
20
18
16
14
12
10
8
6
4
2
00.2 0.3 0.4 0.5 0.6
Porosity, n10-20 10-16
Verticalpermeability, k (m2)
10-18
59% clay
34% clay59% clay
34% clay
We study the state and evolu on of pressure, stress, deforma on, and fluid migra on through experiments, models, and field study. We are dedicated to producing innova ve
concepts that couple geology and fluid flow.
GeoFluids Co-Directors
2013 Consortium Meeting (Feb 21-22)89 attendees representing
11 different companies