Geochemical evaluation of the eastern gas shales. Part I

PDF Version Also Available for Download.

Description

Work devoted to assessment of Eastern gas shales is reported. It is noted that although the Late Devonian-age dark shales of the Eastern Interior Basins are thought to be uniformly gassy, organic geochemical studies in the Appalachian and Illinois Basins show that the gas is not uniformly distributed and that most of the gas is probably sourced and largely retained in thin, organic-rich zones that were deposited in restricted marine environments. As the Devonian-age basins filled, the environments of deposition of the Appalachian Basin and Illinois Basin became nonmarine more and more northerly and northwestwardly, respectively. Heavy hydrocarbon-to-organic carbon ratios ... continued below

Physical Description

Pages: 35

Creation Information

Mclver, R.D. & Zielinski, R.E. September 29, 1978.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

Work devoted to assessment of Eastern gas shales is reported. It is noted that although the Late Devonian-age dark shales of the Eastern Interior Basins are thought to be uniformly gassy, organic geochemical studies in the Appalachian and Illinois Basins show that the gas is not uniformly distributed and that most of the gas is probably sourced and largely retained in thin, organic-rich zones that were deposited in restricted marine environments. As the Devonian-age basins filled, the environments of deposition of the Appalachian Basin and Illinois Basin became nonmarine more and more northerly and northwestwardly, respectively. Heavy hydrocarbon-to-organic carbon ratios show that the organic matter associated with the restricted marine environments is different in the two basins. During virtually the entire period in question, the Appalachian Basin had a direct connection; the Illinois Basin was somewhat isolated by the already developing Cincinnati Arch on the east and the Kankakee or Wabash Arch on the north. However, the differences in organic matter noted in this study suggest a northwest connection of the Illinois Basin to a different ocean mass than that which supplied marine waters to the Appalachian Basin. As a fossil fuel resource, certain facies within the dark Devonian-age shale are much richer gas sources than others. The most prolific potential reservoirs (naturally occurring or induced) should be sought or located in the geologic section containing orcontiguous to the richest organic source intervals; i.e., rocks deposited in restricted marine environments. The amount of gas in rocks of each interval depends directly on the amount of detrital organic matter. Virtually all the gas as well as virtually all the liquid hydrocarbons are retained in the rock where they were generated.

Physical Description

Pages: 35

Notes

Dep. NTIS, PC A03/MF A01.

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: MLM-2563
  • Grant Number: EY-76-C-04-0053
  • DOI: 10.2172/6526676 | External Link
  • Office of Scientific & Technical Information Report Number: 6526676
  • Archival Resource Key: ark:/67531/metadc1212652

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • September 29, 1978

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

Description Last Updated

  • Oct. 19, 2018, 9:34 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 2

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Mclver, R.D. & Zielinski, R.E. Geochemical evaluation of the eastern gas shales. Part I, report, September 29, 1978; United States. (digital.library.unt.edu/ark:/67531/metadc1212652/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.