Regional Mapping and Reservoir Analysis of the Upper Devonian Shale in Pennsylvania*
Jared M. VanMeter1
Search and Discove...
INFLECTION POINT
Regional Mapping and Reservoir Analysis of the
Upper Devonian Shale in Pennsylvania
“An event that result...
Introduction
The Upper Devonian Shale has produced gas since 1980s in West Virginia
 Vertical wells targeting fractures ...
Stratigraphy of Pennsylvania
0
Southwestern PA – Central PA
Cashaqua Shale
Penn Yan Shale
Burket Shale
Middlesex Shale
Rhi...
4
Regional Log Signatures of Upper Devonian Shale
Rhinestreet Shale
Cashaqua Shale
Northwestern PA
0 300
Cashaqua Shale
Pe...
5
Burkett Driller’s Depth Structure Map
6
Type Section A-A’
Log GR scale = 0-200 API
BURKETBURKETBURKETBURKETBURKET
Burket Shale Gross Thickness
C.I.= 10ft
2200 120
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat Column
Burket ...
Burket Net Thickness greater than 160 API
C.I.= 10ft
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat Column
160...
Burket Net Thickness greater than 200 API
C.I.= 5ft
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat Column
600 ...
Penn Yan Shale Gross Thickness
C.I.= 20ft
Cashaqua
Penn Yan
Burkett
Middlesex
Rhinestreet
Tully
Strat Column
5000 250
Genesee Group Gross Thickness
C.I.= 20ft
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat Column
6000 300
Middlesex Gross Thickness
C.I.= 10ft
Westward shift
of depocenter
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Str...
Middlesex Net Thickness greater than 160 API
C.I.= 5ft
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat Column
3...
Middlesex Net Thickness greater than 200 API
1
2
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat Column
300 15
Cashaqua Gross Thickness
C.I.= 20ft
Two Clastic Influx
Sources
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat ...
Rhinestreet Gross Thickness
C.I.= 20ft
Westward shift
of depocenter
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
S...
Rhinestreet Net Thickness greater than 160 API
C.I.= 10ft
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat Colum...
Rhinestreet Net Thickness greater than 200 API
C.I.= 5ft
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat Column...
Total Upper Devonian Shale Gross Thickness
1
2
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat Column
20000 1000
Total Upper Devonian Shale Net Thickness greater than 160 API
C.I.= 10ft
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tu...
Total Upper Devonian Shale Net Thickness greater than 200 API
Cashaqua
Penn Yan
Burket
Middlesex
Rhinestreet
Tully
Strat C...
22
Upper Devonian Shale Activity Map
1 2
The first reservoir fairway has a
stacked potential of 2 main
reservoir packages:...
23
Conclusions
Gross Thickness mapping shows the following:
•Mapping indicates that basin dynamics caused gross thickness...
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Range Resources Maps & Analysis of Upper Devonian Shale in PA

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A presentation from Jared VanMeter from Range Resources showing maps and background information on the emerging Upper Devonian Shale formation--a layer of shale that sits a few hundred feet above the Marcellus Shale in the northeastern U.S. Range and several other drillers are now targeting the Upper Devonian, part of a "stacked play" strategy that includes drilling three layers in the same well: Upper Devonian, Marcellus and Utica.

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Range Resources Maps & Analysis of Upper Devonian Shale in PA

  1. 1. Regional Mapping and Reservoir Analysis of the Upper Devonian Shale in Pennsylvania* Jared M. VanMeter1 Search and Discovery Article #50738 (2012)** Posted October 17, 2012 *Adapted from oral presentation given at AAPG Eastern Section meeting, Cleveland, Ohio, 22-26 September 2012 **AAPG©2012 Serial rights given by author. For all other rights contact author directly. 1 Range Resources - Appalachia, LLC, Canonsburg, PA (jvanmeter@rangeresources.com) Abstract Although the Devonian Shale of the Appalachian Basin has been producing gas since the early 1800s, only recently has it become a giant play. In 2004, Range Resources, using analogues with geology and completion techniques in the Barnett Shale, began producing gas from a Marcellus Shale well in Washington County, Pennsylvania. Since then other organic shale packages both above and below the Marcellus have attracted industry interest considerably. The Upper Devonian Shale in Pennsylvania is one of these viable plays and is the centerfold for this research. The main purpose of this investigation is to define the distribution of the organic-rich facies of various Upper Devonian Shale intervals above the Tully Limestone within Pennsylvania. The analysis is based on well log data, primarily gamma-ray logs, which are the most common and well calibrated, and bulk density logs, where available. Extensive stratigraphic correlations have been conducted to trace key formation tops across the study area. Detailed log analysis has been performed to normalize the logs and define key reservoir quality indicators. The following maps were generated over the study area.  Gross Thickness Isopachs of the Rhinestreet Shale, Cashaqua Shale, Middlesex Shale, Genesee Shale, and Burkett Shale  200 API Gamma-ray Net Pay maps of the Rhinestreet Shale, Cashaqua Shale, Middlesex Shale, Genesee Shale, and the Burkett Shale  160 API Gamma-ray Net Pay maps of the Rhinestreet Shale, Cashaqua Shale, Middlesex Shale, Genesee Shale, and the Burkett Shale These observations and others portrayed on this new series of maps provide a better understanding of the development of the Upper Devonian Shale in the Appalachian Basin. Refining our knowledge of the geology with this series of geologic maps will allow the flexibility of relatively easy revisions and rapid dissemination of continuously evolving geologic knowledge, while further advancing industry exploration of the Upper Devonian Shale within Pennsylvania.
  2. 2. INFLECTION POINT Regional Mapping and Reservoir Analysis of the Upper Devonian Shale in Pennsylvania “An event that results in a significant change in the progress of a company.” -Investopedia
  3. 3. Introduction The Upper Devonian Shale has produced gas since 1980s in West Virginia  Vertical wells targeting fractures were hit and miss in low pressure area.  Since then organic packages, above and below the Marcellus attracted industry interest  Advances in drilling and multistage fracture technology in Marcellus and Barnett Shale have made this possible  Upper Devonian Shale is a viable economic play  Stacked potential reservoir over a widespread area  Currently being tested by industry  2009 Range produced from the first horizontal Upper Devonian Shale well in Pennsylvania  The main purpose of this investigation is to define and map distribution of organic-rich facies in various Upper Devonian Shale intervals above Tully Limestone
  4. 4. Stratigraphy of Pennsylvania 0 Southwestern PA – Central PA Cashaqua Shale Penn Yan Shale Burket Shale Middlesex Shale Rhinestreet Shale Tully Limestone Mahantango Shale Marcellus Shale Onondaga Limestone Cashaqua Shale Northwestern PA Rhinestreet Shale Tully Limestone Mahantango Shale Marcellus Shale Onondaga Limestone Central PA - Northeast PA Cashaqua Shale Penn Yan Shale Burket /Geneseo Shale Tully Limestone Mahantango Shale Marcellus Shale Onondaga Limestone
  5. 5. 4 Regional Log Signatures of Upper Devonian Shale Rhinestreet Shale Cashaqua Shale Northwestern PA 0 300 Cashaqua Shale Penn Yan Shale Burket Shale Middlesex Shale Rhinestreet Shale Southwestern PA – Central PA 0 300 Cashaqua Shale Penn Yan Shale Burket / Geneseo Shale Central PA - Northeast PA 0 300 2 1 1
  6. 6. 5 Burkett Driller’s Depth Structure Map
  7. 7. 6 Type Section A-A’ Log GR scale = 0-200 API BURKETBURKETBURKETBURKETBURKET
  8. 8. Burket Shale Gross Thickness C.I.= 10ft 2200 120 Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column Burket Shale
  9. 9. Burket Net Thickness greater than 160 API C.I.= 10ft Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 1600 80 Burket Shale
  10. 10. Burket Net Thickness greater than 200 API C.I.= 5ft Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 600 30 Burket Shale
  11. 11. Penn Yan Shale Gross Thickness C.I.= 20ft Cashaqua Penn Yan Burkett Middlesex Rhinestreet Tully Strat Column 5000 250
  12. 12. Genesee Group Gross Thickness C.I.= 20ft Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 6000 300
  13. 13. Middlesex Gross Thickness C.I.= 10ft Westward shift of depocenter Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 1200 60
  14. 14. Middlesex Net Thickness greater than 160 API C.I.= 5ft Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 350 20
  15. 15. Middlesex Net Thickness greater than 200 API 1 2 Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 300 15
  16. 16. Cashaqua Gross Thickness C.I.= 20ft Two Clastic Influx Sources Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 5600 280
  17. 17. Rhinestreet Gross Thickness C.I.= 20ft Westward shift of depocenter Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 4000 200
  18. 18. Rhinestreet Net Thickness greater than 160 API C.I.= 10ft Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 2000 100
  19. 19. Rhinestreet Net Thickness greater than 200 API C.I.= 5ft Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 700 35
  20. 20. Total Upper Devonian Shale Gross Thickness 1 2 Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 20000 1000
  21. 21. Total Upper Devonian Shale Net Thickness greater than 160 API C.I.= 10ft Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 2800 140
  22. 22. Total Upper Devonian Shale Net Thickness greater than 200 API Cashaqua Penn Yan Burket Middlesex Rhinestreet Tully Strat Column 700 35
  23. 23. 22 Upper Devonian Shale Activity Map 1 2 The first reservoir fairway has a stacked potential of 2 main reservoir packages: 1) Burket and Middlesex, and 2) Rhinestreet The second reservoir has a thickened Burket, but is separated from the Middlesex by non reservoir rocks
  24. 24. 23 Conclusions Gross Thickness mapping shows the following: •Mapping indicates that basin dynamics caused gross thickness of organic members to shift westward over time. •Mapping indicates two clastic sources fed the basin in Upper Devonian time •Regional basement faults and lineaments had an effect on the deposition of the formations and different cross strikes activated at different times • Foreland bulge paleostructural high caused lack of deposition and/or erosion of Burket, Penn Yan, and Middlesex in NW PA  Reservoir mapping indicated two reservoir “fairways” in Pennsylvania.  In southern PA there are two reservoir packages, whereas in northeastern PA the Burkett is the main reservoir.  Upper Devonian Shale is being explored by multiple companies for potential oil and gas reserves and is a viable play with many successful test wells already drilled

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