1. Regional Trends in the Trenton and Black River of the Michigan Basin Well log tomography and lithology data reveal potential exploration opportunities A. S. Wylie, Jr. and J. R. Wood Michigan Technological University

2. ORDOVICIAN Trenton/BR-regional Trenton/BR - field scale Stoney Point Trenton/BR -regional lithology and exploration opportunities Today’s Presentation

3. Trenton/Black River Outcrops and Penetrations (>3700) TRENTON BLACK RIVER Utica Shale TRENTON Penetrations N 50 miles

4. Trenton Isopach and Production CI: 50 ft 50 miles N Penetrations CROSS SECTIONSCROSS SECTIONS N-S

5. Trenton Isopach and Production CI: 50 ft 50 miles N Penetrations CROSS SECTIONSCROSS SECTIONS W-E

6. Top Trenton Subsea Contours and Production CI: 500 ft 50 miles N ZOOM IN Penetrations

7. Deerfiel d Northville AlbioScipio Stoney Pt Annual Oil (bbls) Trenton/Black River Production Detail Plus Ontario Fields

8. Trenton/Black River Production (through June 2003, Michigan)

9. Log Curve Amplitude Slicing and Tomography- Review Top Trenton Time-surface –Any regularly sampled data from boreholes –One or more correlative, bounding time- surfaces (e.g. Log or Lithology curve data) 100 mi 250 ft Base Trenton/ Top Black River Utica Shale Slicing downward from the Top Trenton at 1 ft increment NorthwestSoutheast

10. Gamma Ray Amplitude s Dirty Carbonates (GR>36 API) Clean Carbonates (GR<24 API) One Top Down Slice High GR Low GR N From Utica Contour Interval 6 API Units Producers - Trnn

11. Gamma Ray Animation Dirty Carbonates (GR>36 API) Clean Carbonates (GR<24 API) 357 Top Down Slices High GR Low GR Producers - Trnn N From Utica Contour Interval 6 API Units

12. ORDOVICIAN Trenton/BR-regional Trenton/BR - field scale Stoney Point Trenton/BR -regional lithology and exploration opportunities Today’s Presentation

13. Stoney Point N CI:10 ft 1 mile Producer T/Trnn Structure Production

14. Stoney Point – Cross Section N CI:20 ft 1 mile Producer T/Trenton Structure Digital Logs Penetration -2600 -2520

15. DATUM TRNN BKRV Bentonites Stoney Point Cross Section WESTEAST GR PEF Gamma Ray 0 to 150 api; gamma ray amplitude interpolation between wells Top Down Slicing Millbrig Hardground/ unconformity Slice 100

16. One Gamma Ray Slice Dirty Carbonates (GR>36 API) Clean Carbonates (GR<24 API) Top Trenton Down High GR Low GR Wells N Stoney Point Contour Interval 6 API Units (152 with curves)

17. Gamma Ray Animation Dirty Carbonates (GR>36 API) Clean Carbonates (GR<24 API) Top Trenton Down High GR Low GR Wells N Stoney Point Contour Interval 6 API Units (182 with curves) 350 Slices

18. DATUM TRNN Stoney Point Cross Section WESTEAST GR PEF Gamma Ray 0 to 150 api; gamma ray amplitude interpolation between wells Bottom Up Slicing from Black River Shale Better time-line (Bentonite)

19. Gamma Ray Animation Dirty Carbonates (GR>36 API) Clean Carbonates (GR<24 API) High GR Low GR Wells N Stoney Point Contour Interval 6 API Units (182 with curves) Black River Shale Up 350 Slices

20. DATUM TRNN Stoney Point Cross Section WESTEAST GR PEF Photoelectric factor 1 to 6 b/e; PEF amplitude interpolation between wells Bottom Up Slicing from Black River Shale Lithology Indicator

21. One PEF Slice – Slice 19 Limestone (PEF>4.5 b/e) Dolomitic (PEF<4.5 b/e) Black River Shale Up High PE Low PE Wells N Stoney Point Contour Interval 1 barnes electron (87 with curves) (cutoffs generalized to Stoney Point)

22. PEF Animation Limestone (PEF>4.5 b/e) Dolomitic (PEF<4.5 b/e) Black River Shale Up High PE Low PE Wells N Stoney Point Contour Interval 1 barnes electron (87 with curves) (cutoffs generalized to Stoney Point) 353 Slices

23. ORDOVICIAN Trenton/BR-regional Trenton/BR - field scale Stoney Point Trenton/BR - regional lithology and exploration opportunities Today’s Presentation

24. TRNN Lithology Animation Top Trenton Down Lithology Slices Lithology Control (1800 wells) N 200 Slices LIMESTONEDOLOMITE SHALE

25. TRNN Cuttings - Rhombic Rhombs described in cuttings (78 wells, 5 to 320 ft) Producing Wells N Rhombic texture

26. TRNN Cuttings - Vugs Vugs described in cuttings (180 wells, 2 to 400 ft) Producing Wells N VugsRhombic

27. TRNN Cuttings - Fractures Fractures described in cuttings (240 wells, 5 to 500 ft) Producing Wells N VugsRhombicFractures

28. Basin-scale Faults (JRW) Interpreted Faults from top mapping, terrain analysis, literature Faults VugsRhombicFractures

29. TRNN Cuttings - Shows Shows of Oil (700+ wells) Oil Shows N VugsRhombicFractures

30. TRNN Cuttings - Shows Shows of Gas (500 wells) Oil Shows N VugsRhombicFractures Gas Shows

31. TRNN Opportunities Oil Shows N VugsRhombicFractures Gas Shows All Trenton penetrations and Isopach CI: 50 ft

32. TRNN Opportunities Oil Shows N VugsRhombic Fractures Gas Shows All Trenton penetrations and Isopach CI: 50 ft DOLOMITIC CUTTINGS

33. LCA Three or more potential Trenton-Black River fairways or fault trends defined for further investigation Regional trends in cuttings descriptions can reveal potential exploration areas Well log tomography can be used with traditional techniques to improve subsurface interpretations Conclusions\What next?