Integrated Microseismic and 3D Seismic Interpretations

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Integrated Microseismic and 3D Seismic
Interpretations
Proposal submitted through the Environmentally
Friendly Drilling Systems Program East Center at
WVU (Doug Patchen, Center Director)
Tom Wilson Department of Geology and
Geography West Virginia University Morgantown, WV
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General objectives of the project

1. Develop a 3D seismic interpretation of an active
   Marcellus shale gas development area
2. Incorporate available geophysical logs and
   subsurface data into the geophysical
   characterization and subsurface interpretation
3. Position microseismic events in the subsurface
   stratigraphic framework and 3D seismic
   interpretation
4. Evaluate relationship between seismic scale fault
   networks, other seismic attributes and
   microseismic distribution
5. Create a workflow you can use and modify for
   decision making on placement of future laterals.

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Task 1.0 3D seismic analysis
Subtask 1.1 Database creation. Bring data sets
including 3D seismic and well log data together
in a common interpretation and computational
platform. Subtask 1.2 Calculate synthetic seismic
response, integrate well log data into seismic
and develop a velocity function. Subtask 1.3
Conduct basic interpretation of 3D
seismic. Subtask 1.4 Convert 3D seismic to depth
and accurately position laterals microseismic
events in the depth volume. Subtask 1.5
Develop/test various 3D seismic discontinuity
detection workflows to enhance seismic features
that may influence fracability Use microseismic
response for validation/calibration.
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Post-stack processing will be conducted in time
and depth domains. Accurate depth conversion is
necessary. Already exist?
Use synthetic seismogram to tie well log data
into seismic develop velocity
function. Microseismic velocity function may be
used to improve seismic event tie for depth
conversion. The Burley 1 well (a nearby deep
well) provides some regional control on deeper
velocity distribution.
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Pre post stack depth migrations are only as
good as the velocity function
The data collected over this WV site had obvious
anomalies associated with an incorrect elevation
correction velocity. In this case the elevation
correction velocity was much to low. With the
datum above the valleys, seismic events across
valleys were associated with time-structural low
in areas of subsurface structural high.
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Basic workflow
Post-stack processing workflows will be developed
to meet the needs of this area and the unique
properties of this reservoir interval.
Discontinuities will be extracted in time and
depth domain for comparison. Other attribute
workflows will be developed and evaluated in the
context of microseismic responses.
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Task 1.0 3D seismic analysis (continued)
Subtask 1.6 Conduct orientation analysis of
extracted discontinuities Subtask 1.7 Develop
composite fracture distribution and intensity
drivers using seismic discontinuities and other
seismic attributes Subtask 1.8 Develop model
discrete fracture network Subtask 1.9 Compute
porosity and permeability distributions in the DFN
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Orientations of seismic discontinuities.How do
they fit in the context of regional
structure/tectonic history?
anomalous trend
Less pervasive J2 trend
J1 trend
SHmax trend
Optimal Lateral Orientation
Analysis of seismic discontinuity trends in
Marshal Co., for example, reveals both expected
and anomalous trends. What does the microseismic
reveal?
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Composite fracture driver derived from
discontinuity and max curvature normal to SHmax
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kj and cumulative kj through a portion of the seal
kj perm
Integrated kj perm
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Task 2.0 Microseismic evaluation
Subtask 2.1 Bring microseismic data into the
database Subtask 2.2 Examine microseismic for
presence of master fracture zones (what does the
distribution of microseismic events tell
us?) Subtask 2.3 Integrate microseismic into Task
1 efforts
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Microseismic display and integration
capabilitiesPetrel/Nemo
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Evaluating shale production within the context of
microseismic response
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Project schedule
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Recent publications on related work
Journal Papers Oudinot, A., Koperna, G., Philip,
Z., Liu, N., Heath, J., Wells, A., Young, G., and
Wilson, T., 2011, CO2 injection performance in
the Fruitland coal fairway, San Juan Basin
Results of a Field Pilot Society of Petroleum
Engineers, SPE 127073, 864-979. Wilson, T.,
Wells, A., Peters, D., Mioduchowski, A.,
Martinez, G., Koperna, G., Akwari, B., and Heath,
J., 2012a, Fracture and 3D Seismic
Interpretations of the Fruitland Coal, San Juan
Basin Implications for CO2 Retention and Tracer
Movement International Journal of Coal Geology,
99, pp. 35-53. http//www.sciencedirect.com/scienc
e/article/pii/S0166516212000432. Wilson, T.,
Siriwardane, H., Zhu, L., Bajura, R., Winschel,
R., Locke, J., Bennett, J., 2012b, Fracture model
of the Upper Freeport coal Marshall County West
Virginia pilot ECBMR and CO2 sequestration site
International Journal of Coal Geology 13p.,
http//dx.doi.org/10.1016/j.coal.2012.05.005. Webe
r, M., Wilson, T., Akwari, B., Wells, A., and
Koperna, G., 2012. Impact of geological
complexity of the Fruitland Formation on combined
CO2 enhanced recovery/sequestration at San Juan
Basin pilot site. International Journal of Coal
Geology, 104, pp 46-58. See http//dx.doi.org/10.1
016/j.coal.2012.09.011, T. Wilson corresponding
author. Wells, A., Diehl, J., Strazisar, B.,
Wilson, T., Stanko, D., in press, Atmospheric and
soil-gas monitoring for surface leakage at the
San Juan Basin CO2 pilot test site at Pump Canyon
New Mexico, using perfluorocarbon tracers, CO2
soil-gas flux and soil-gas hydrocarbons.
International Journal of Greenhouse Gas Control,
28p. Procedings Wilson, T., Weber, M., Bennett,
J., Wells, A., Siriwardane, H., Akwari, B.,
Koperna, G., 2012. Fracture Model, Ground
Displacements and Tracer Observations Fruitland
Coals, San Juan Basin, New Mexico, CO2 Pilot
Test Proceedings of the International Pittsburgh
Coal Conference, 13p. Meeting presentation Wilson
, T., Smith, V., Brown, A., Gao, D., 2012.
Modeling discrete fracture networks in the
Tensleep Sandstone Teapot Dome, Wyoming AAPG
Search and Discovery Article 50658, 4p.
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References cited
Aare, V., Astratti, D, Dayni, T., Mahmoud, S.,
Clark, A., Stellas, M., Stringer, J., Toelle, B.,
Vejbaek, O., and White, G., 2012, Seismic
detection of subtle faults and fractures
Oilfield Review, 28-43. Rich, J. P., and
Ammerman, M., 2010, Unconventional geophysics for
unconventional plays SPE 13179, SPE
unconventional gas conference Pittsburgh, PA.
Fan, L., Thompson, J., and Robinson, J., 2010,
Understanding gas production mechanisms and
effectiveness of well stimulation in the
Haynesville Shale through reservoir simulation
CSUG/SPE 136696, Canadian unconventional
resources and international petroleum conference
, Calgary, Canada. Toelle, B., 2012, Shale plays
evaluation finding production sweet spots
Schlumberger NeXT course, Houston, TX.
Questions?