Presentation is loading. Please wait.

Presentation is loading. Please wait.

CO 2 Sequestration in Gas Shales of Kentucky Brandon C. Nuttall, James A. Drahovzal, Cortland F. Eble, R. Marc Bustin U.S. DOE/NETL DE-FC26-02NT41442 AAPG.

Similar presentations


Presentation on theme: "CO 2 Sequestration in Gas Shales of Kentucky Brandon C. Nuttall, James A. Drahovzal, Cortland F. Eble, R. Marc Bustin U.S. DOE/NETL DE-FC26-02NT41442 AAPG."— Presentation transcript:

1 CO 2 Sequestration in Gas Shales of Kentucky Brandon C. Nuttall, James A. Drahovzal, Cortland F. Eble, R. Marc Bustin U.S. DOE/NETL DE-FC26-02NT41442 AAPG Calgary June 19-22, 2005

2 Why Black Shales? Distribution and potential storage volumeDistribution and potential storage volume Known producerKnown producer –Gas adsorbed on kerogen and clay Analogous to CBM?Analogous to CBM?

3 Basic Research: Feasibility CO 2 sorption capacityCO 2 sorption capacity CH 4 displacement potentialCH 4 displacement potential

4 Devonian Shale in Kentucky Estimated gas in place: 63 to 112 tcf Present in subsurface >=1000 deep and >=100 thick Producing area

5 Big Sandy Reservoir Info Completion interval >500Completion interval >500 Average porosity 4.3%Average porosity 4.3% Max. porosity 11%Max. porosity 11% Temperature 84 o FTemperature 84 o F Average pressure 400 psiAverage pressure 400 psi Permeability <0.1 mdPermeability <0.1 md Atlas of Major Appalachian Gas Plays, 1996

6 Typical Reservoir Conditions for CO 2 Injection Critical Point Saturation Line Melting Line Temp (ºF) Pressure (psia) Solid Liquid Gas

7 Geologic Column Surface 1,000 2,000 3,000 4,000 Coal measures, mixed sand, shale, and coal. Salt sands Pennington: Sand and shale Big Lime: Carbonate Pennsylvanian Mississippian Devonian Borden: Sand and shale Ohio: Carbonaceous black shale 3,800 +/- of mixed sand, shale, and carbonate provide adequate reservoir seal. Composite thickness data from Knott and Leslie County wells and Dillman and Ettensohn (1980)

8 Shale Overview Mississippian Borden Cleveland Devonian Ohio Shale Berea Sunbury Three Lick Bed Upper Huron Middle Huron Lower Huron Olentangy 3-component system3-component system –Quartz –Clay –Organic matter 3-component system3-component system –Quartz –Clay –Organic matter } Clastic GR Density

9 Cross section LAS file AdsorptionBoth Study Area

10 Average Organic Content Total Organic Carbon

11 Mean Random Reflectance Upper oil window and wet gas/condensates R 0 random x ~ R 0 max Frequency

12 Devonian Shale Adsorption Isotherms Standard cubic feet per ton CO 2 CH 4

13 Adsorption at 400 PSIA Adsorbed gas (standard cubic feet per ton of shale) Average CH 4 : 8.1 scf/ton Average CO 2 : 42.9 scf/ton CO 2 = 5.3 x CH 4 Frequency

14 CO 2 Adsorption at 400 PSIA r 2 = 0.80 CO 2 scf/ton = 7.9 x TOC

15 CNR Elk Horn

16 Cleveland Three Lick Upper Huron Middle Huron Lower Huron Olentangy Sunbury Borden Berea Sidewall cores for adsorption and CH 4 displacement

17 ECS Shale Analysis Clays BoundWater Kerogen GasSaturation TotalPhi Adsorbed Gas (scf) TotalGas(scf) TOC Cum.Gas(bcf) QFM

18 Crossplot Lower density & Higher GR = More organic RhoB max gray shale = 2.82 g/cc (g/cc)

19 Calculate TOC from RhoB Schmoker, 1993, USGS Bull 1909

20 Shading based on density (RhoB) <2.4 >2.8 More carbonaceous More clastic Cross Section WE 1,600 feet 72 miles

21 27.6 Billion Tons CO 2 Estimated 40 scf/ton thickness weighted average >3 MM <1 MM Tons/sq km

22 Future Map TOC from density logsMap TOC from density logs New estimate of CO 2 capacityNew estimate of CO 2 capacity Demonstration projectDemonstration project –CO 2 monitoring Surface soils Produced gas –Reservoir simulation

23 Conclusion Preliminary analyses indicate the organic-rich Mississippian– Devonian shales of Kentucky have the potential to sequester large volumes of CO 2.


Download ppt "CO 2 Sequestration in Gas Shales of Kentucky Brandon C. Nuttall, James A. Drahovzal, Cortland F. Eble, R. Marc Bustin U.S. DOE/NETL DE-FC26-02NT41442 AAPG."

Similar presentations


Ads by Google