Carbon Sequestration: Potential of the Early Pennsylvanian Breathitt Group, Pocahontas Basin
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Transcript of Carbon Sequestration: Potential of the Early Pennsylvanian Breathitt Group, Pocahontas Basin
CARBON SEQUESTRATION: RESERVOIR CHARACTERIZATION AND POTENTIAL OF EARLY PENNSYLVANIAN BREATHITT GROUP, CENTRAL APPALACHIAN BASIN
Ryan GrimmVirginia Tech Dept. of Geosciences
Committee members:Ken Eriksson, ChairFred ReadBill HenikaSteve Greb - University of Kentucky
Early Pennsylvanian Breathitt Group - Raven and Kennedy coal zone roadcut, Grundy Virginia. USACOE Flood Protection Project. Vertical height ~100m
Carbon Capture and Geological Storage Opportunities in the Pocahontas Basin
Objective – Investigate properties of geologic media for long term CO2 storage from a future point source in southwestern Virginia – think FUTUREGEN
Paleozoic Reservoirs and Seals of the Pocahontas Basin
Stu
dy In
tervalS
tud
y Interval
ECBM – ENHANCED COAL BED METHANE RECOVERY AND PRODUCTION USING CO2 FLOODS
SECARB estimates 398 million tons of technically feasible ECBM - CO2 storage capacity in the Pocahontas Basin
Potential enhanced recovery of >2.5 TCF of CBM gas production
Highlights need for increased understanding of surrounding lithologies
Regional shale seals
&
Additional storage capacities / hazards of porous sandstones
Central Appalachian Basin and Pocahontas sub-basin are defined by bounding structures
Regional Assessment of Pocahontas sub-basin
Adapted from USGS FS2004-3092 and Chesnut, 1994; Greb and Chesnut, 1996; Korus, 2002; Greb et al., 2004; Greb and Martino, 2005
GEOLOGIC SETTING OF POCAHONTAS BASIN ASSESSMENT REGION
Extent of Pennsylvanian Strata
South Dickenson Strike Line 1-4
DATASET
GAMMA RAY SCINTILLOMETRY - FIELD MEASUREMENTS OF LITHOLOGIC RADIOACTIVITY AT GRUNDY
Determine Reservoir Parameters –
Test porosities and permeabilities of shales and sandstones
STARVED RIPPLES
SANDY RHTHYMITES
ORGANIC PARTINGS
SB
SB
FS
Neonereites Scalarituba
Trace Fossil Analysis
HENSLEY SHALE – KEY REGIONAL DATUM AND SEAL
Raw Data - South Dickenson Strike Line 1
Quartz Arenites - SDS 1
Lithic Arenites – SDS1
Minor Flooding Surfaces – SDS1
Minor Lithic Sands - SDS 1
- +
Sequence Interpretation Basics
Sequences – SDS 1
Conclusions• Sequence architecture of the Pocahontas basin
exhibits broad, regional flooding surfaces and discontinuities in the subsurface
• Integration of core and outcrop measurements with geophysical well log data aids sequence model verification
• Sequence model identifies regional CO2 storage and sealing lithologies for targeted sequestration opportunities
• Continued work will focus on the interplay of eustatic and tectonic controls on basin infilling
THANKS!
Katie O’Donnell
Bill Rouse
Erik Haug
Ben Roth
David Greenwald
Brad Kelley
Nino Ripepi
Ilija Miskovic