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

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


  • Author: Dengler, L.A.
    Creator Type: Personal


  • Name: Lawrence Livermore National Laboratory
    Place of Publication: Livermore, California
    Additional Info: California Univ., Livermore (USA). Lawrence Livermore Lab.


  • Creation: 1975-09-30


  • English


  • Content 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)
  • Physical Description: Pages: 34


  • Keyword: Stresses
  • Keyword: *Sandstones- - Microstructure
  • Keyword: Fracturing
  • Keyword: Electron Microscopy
  • Keyword: N42520* --Engineering--Nuclear Explosions--Civil Uses
  • STI Subject Categories: 030300* --Natural Gas--Drilling, Production & Processing
  • Keyword: *Natural Gas Wells-- Well Stimulation
  • Keyword: Strains
  • Keyword: Permeability
  • Keyword: *Rio Blanco Event
  • Keyword: Optical Microscopy


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


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report


  • Text


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


  • Display Note: Dep. NTIS