Effect of stress on the microstructure of a graywacke sandstone from the site of the Rio Blanco gas-stimulation experiment

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Project Rio Blanco was designed to increase rock permeability in an existing gas reservoir by fracturing the rock with a vertical array of three simultaneous nuclear explosions. The project site was CER Geonuclear hole RB-E- 01, Section 14, T35, R98W, Rio Blanco County, in the Piceance Creek Basin of northwest Colorado. The most essential part of this project was to produce fracturing in, and thereby to increase the permeability of, the reservoir rock. This report contains the results of optical and scanning electron microscope (SEM) studies done on unstressed and laboratory-stressed samples of graywacke sandstone from the 6458-ft level of ... continued below

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Pages: 34

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Dengler, L.A. September 30, 1975.

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Description

Project Rio Blanco was designed to increase rock permeability in an existing gas reservoir by fracturing the rock with a vertical array of three simultaneous nuclear explosions. The project site was CER Geonuclear hole RB-E- 01, Section 14, T35, R98W, Rio Blanco County, in the Piceance Creek Basin of northwest Colorado. The most essential part of this project was to produce fracturing in, and thereby to increase the permeability of, the reservoir rock. This report contains the results of optical and scanning electron microscope (SEM) studies done on unstressed and laboratory-stressed samples of graywacke sandstone from the 6458-ft level of the emplacement hole. Laboratory-stressed samples were from uniaxial-stress and uniaxial-strain tests made as part of equation-of-state measurements used to provide input parameters for preshot code calculations. (auth)

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Pages: 34

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  • Other Information: Orig. Receipt Date: 30-JUN-76

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  • Report No.: UCRL--51919
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/4129709 | External Link
  • Office of Scientific & Technical Information Report Number: 4129709
  • Archival Resource Key: ark:/67531/metadc868205

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Office of Scientific & Technical Information Technical Reports

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

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Creation Date

  • September 30, 1975

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 18, 2016, 1:52 p.m.

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Dengler, L.A. Effect of stress on the microstructure of a graywacke sandstone from the site of the Rio Blanco gas-stimulation experiment, report, September 30, 1975; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc868205/: accessed December 10, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.