Reservoir fracture mapping using microearthquakes: Austin chalk, Giddings field, TX and 76 field, Clinton Co., KY Metadata

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  • Main Title Reservoir fracture mapping using microearthquakes: Austin chalk, Giddings field, TX and 76 field, Clinton Co., KY


  • Author: Phillips, W.S.
    Creator Type: Personal
  • Author: Rutledge, J.T.
    Creator Type: Personal
  • Author: Gardner, T.L.
    Creator Type: Personal
    Creator Info: SPE, Richardson, TX (United States)
  • Author: Fairbanks, T.D.
    Creator Type: Personal
  • Author: Miller, M.E.
    Creator Type: Personal
  • Author: Schuessler, B.K.
    Creator Type: Personal
    Creator Info: Los Alamos National Lab., NM (United States)


  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)


  • Name: Los Alamos National Laboratory
    Place of Publication: New Mexico
    Additional Info: Los Alamos National Lab., NM (United States)


  • Creation: 1996-11-01


  • English


  • Content Description: Patterns of microearthquakes detected downhole defined fracture orientation and extent in the Austin chalk, Giddings field, TX and the 76 field, Clinton Co., KY. We collected over 480 and 770 microearthquakes during hydraulic stimulation at two sites in the Austin chalk, and over 3200 during primary production in Clinton Co. Data were of high enough quality that 20%, 31% and 53% of the events could be located, respectively. Reflected waves constrained microearthquakes to the stimulated depths at the base of the Austin chalk. In plan view, microearthquakes defined elongate fracture zones extending from the stimulation wells parallel to the regional fracture trend. However, widths of the stimulated zones differed by a factor of five between the two Austin chalk sites, indicating a large difference in the population of ancillary fractures. Post-stimulation production was much higher from the wider zone. At Clinton Co., microearthquakes defined low-angle, reverse-fault fracture zones above and below a producing zone. Associations with depleted production intervals indicated the mapped fractures had been previously drained. Drilling showed that the fractures currently contain brine. The seismic behavior was consistent with poroelastic models that predicted slight increases in compressive stress above and below the drained volume.
  • Physical Description: 19 p.


  • Keyword: Oil Wells
  • Keyword: Mapping
  • Keyword: Microearthquakes
  • Keyword: Correlations
  • STI Subject Categories: 58 Geosciences
  • Keyword: Hydraulic Fracturing
  • STI Subject Categories: 02 Petroleum
  • STI Subject Categories: 03 Natural Gas
  • Keyword: Fractured Reservoirs


  • Conference: 71. annual technical conference and exhibition of the Society of Petroleum Engineers, Denver, CO (United States), 6-9 Oct 1996


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


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article


  • Text


  • Other: DE96014248
  • Report No.: LA-UR--96-2371
  • Report No.: CONF-961003--2
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 390627
  • Archival Resource Key: ark:/67531/metadc683787


  • Display Note: OSTI as DE96014248