cel thesis presentation
TRANSCRIPT
Cory LaderAdvisor: Dr. Rudy Slingerland
Appalachian Basin Black Shale GroupDepartment of Geosciences
The Pennsylvania State University
Distribution of Organic Carbon in the early Late Devonian
Burket Member of the Harrell Formation in Pennsylvania
Introduction
- The Marcellus Currently Produces roughly 66.5 Bcf/d - Lower Union Spring Mbr.
- Several thousand feet above Marcellus lies another black shale- the Burket Mbr.- Potential to become the next
hot spot for oil and gas production
Question– Is the Burket Mbr. in PA of sufficient organic richness and
thickness to warrant production?
Approach– Define the Total Organic Carbon (TOC) within the Burket Mbr. in
one core– Develop a function relating %TOC to total gamma ray count
measured in API units– Use the API values from 446 well logs, located throughout
Pennsylvania, to generate a map of the distribution of TOC and thickness of the potential pay zone
Research Objectives
http://www.marcellus.psu.edu/resources/PDFs/DCNR.pdf
Geologic Settings
http://eg.geoscienceworld.org/content/18/4/217/F5.large.jpg
Stratigraphic Relationships
- Early Late Devonian Black Shale- Underlain by the Tully Limestone- Black Shale Member of the Harrell
Fm.- Overlain by the Brallier Fm.- Thickest in NE Pa, thins to the SW- Interfingering with the Harrell Fm.
Smith CoreLocation:
41°12'36.02"N 77°12'18.35"W
Methods
Tully Limestome
Tully Limestone – Burket Member Contact
Burket Member
Burket Member – Brallier Formation Contact
Brallier Formation
The Smith Core and its inferred lithological features
Methods
• Samples taken every foot starting at 125.1 ft and ending at 307.1 ft
• Sampling interval includes all of the Burket member and some of the Tully Limestone and Brallier Formation
• Interval includes a variety of TOC values to produce accurate results
Methods
• All samples were powdered using a silica nitride vial in a Spex 8000 Ball Mill/Mixer and passed through stainless steel sieve
• Powdered samples were decarbonated by reacting the powdered samples with 10% Hydrochloric Acid (HCl) for 48 hours
• Following decarbonation, they were analyzed for TOC using an UIC, Inc. 5014 CO2 Coulometer with a 5200 Autosampler
Methods
Well Location MapMethods
Results
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0125
145
165
185
205
225
245
265
285
305
Depth Vs %TOC%TOC
Dep
th (ft
)
Results
Results
Results
Results
Thickness
Conclusions
• %TOC values of Burket Mbr. Hot spot are greater then 1% (1%= economic)
• Highest %TOC concentrations reside in Tioga, Potter, and Bradford County
• Potential production hot spots range in thickness from 45ft to 85ft• %TOC decreases in the Smith Core due to clastic dilution
Acknowledgements
• Dr. Rudy Slingerland• The Undergraduate Research Fund• Anna Wendt• Courtney Swanson