1. Kerogen, thermal maturity, crude oil inclusions, & pyrobitumens in Bowser and Hazleton Group, Bowser Basin, B.C. L.D. Stasiuk and N.S.F. Wilson Natural Resources Canada Geological Survey of Canada: Calgary

2. Purpose of todays presentation: kerogen (source rocks?), thermal maturity, distribution of crude oil-bitumen- pyrobitumen, temperatures, paragenesis etc.  Review of most current petrology (organic & sedimentary) data collected at GSC Calgary in Bowser  Review (briefly) previous thermal maturity data from Bowser Basin (Evenchick et al, 2002)

3. Methods  Organic Petrology: Reflected white and fluorescent light microscopy  Sedimentary Petrology: Transmitted & reflected light – fluorescence microscopy, fluid inclusion microthermometry  Organic Geochemistry – Rock Eval, biomarkers (?)

4. Samples in this study

5. Ritchie wells 56.417 o N, 129.962 o W Rock Eval – TOC Bowser Gp ? Hazleton Gp ? Source rock ?

6. Rock Eval – kerogen type Ritchie wells 56.417 o N, 129.962 o W

7. Terrestrial-dominated macerals in kerogen: deltaic, marine influence, Ritchie wells 56.417 o N, 129.962 o W Ritchie A-3-J, 2115-2960’, Bowser and uppermost Hazleton ?

8. Terrestrial-dominated macerals in kerogen: deltaic, marine influence Ritchie A-3-J, 2115-2960’, Bowser and uppermost Hazleton ?

9. Probable potential SPENT source rock: marine kerogen precursor ? Ritchie A-3-J, Hazleton Group ? Lower Jurassic 6745’, TOC = 2.4 % Equivalent to Nordegg of Alberta ?? Spent amorphous kerogen

10. Rock Eval – S1 and S2

11. Thermal maturity of Bowser and Hazleton groups – Vitrinite %Ro cond- dry gas dry gas rare Bowser ? Hazleton ? ~ 270-290 o C

12. Pyrobitumens – early high %Ro and late low %Ro cond- dry gas dry gas rare Bowser ? Hazleton ? ~ 180-190 o C ~ 270-290 o C

13. Late ‘low’ maturity pyrobitumens in Ritchie C-62-G Ritchie C-62-G, late low %Ro pyrobitumen in fractures, 7235’ Ritchie C-62-G, late highly anisotropic pyrobitumen in late calcites, 9699.6’ ~ 180-190 o C

14. Late - high maturity crude oil inclusions in Ritchie A-3-J, 2115.7’ 803-2002 Ritchie A-3-J, late crude oil inclusions in calcite and fractures, 2115.7’’

15. Ritchie A-3-J, late crude oil in intercrystalline areas in quartz cement, 4723.4’ Ritchie A-3-J, late crude oil in in calcite cement, 6745.0’ Late - high maturity crude oil (condensate) inclusions in Ritchie

16. 35-45 o API > 45-55 o API red green blue

17. Late - high maturity crude oil and condensate inclusions in Ritchie A-3-J. > 35-50/55 o API > 50-55 o API

18. Tango Creek Formation Bowser Lake Group

19. Late - high maturity crude oil inclusions in Muskaboo Creek Fm, Bowser Lake Group > 55 o API

20. Late pyrobitumen in Muskaboo Creek Fm, Bowser Lake Group, Muskaboo Creek outcrop, 57.56 o N, 129.96 o W %RoRmean = 1.20, ~ 150 o C

21. Pyrobitumen: %RoRmean = 1.58 Late - high maturity crude oil inclusions and late pyrobitumen, Bowser Lake Group, 57.441 o N, 128.572 o W, outcrop Crude oil inclusions Host rock has a thermal maturity level of ~ > 3.6 %Rovitrinite (>240 o C). Late pyrobitumen altered to ~ 160-165 o C

22. Late - high maturity crude oil inclusions, Bowser Lake Group, 57.441 o N, 128.572 o W, outcrop > 50-55 o API

23. Late - high maturity crude oil inclusions, Tango Creek Fm, Sustut Group, 57.709 o N, 128.814 o W, outcrop > 50-55 o API Late pyrobitumen: 1.91 %Ro, ~ 170-180 o C Early pyrobitumen: 5.55 %Ro, ~ > 250 o C Crude oil inclusions

24. Evenchick et al., GSC Open File 4343, 2002

25. Tango Creek Formation Bowser Lake Group