Advanced reservoir characterization and evaluation of CO{sub 2} gravity drainage in the naturally fractured Spraberry Trend Area. Annual report, September 1, 1996--August 31, 1997 Metadata

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Title

  • Main Title Advanced reservoir characterization and evaluation of CO{sub 2} gravity drainage in the naturally fractured Spraberry Trend Area. Annual report, September 1, 1996--August 31, 1997

Creator

  • Author: Schechter, D.S.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Office of the Assistant Secretary for Fossil Energy.
    Contributor Type: Organization
    Contributor Info: USDOE Assistant Secretary for Fossil Energy, Washington, DC (United States)

Publisher

  • Name: Pioneer Natural Resources, Midland, TX (United States)
    Place of Publication: United States

Date

  • Creation: 1998-07-01

Language

  • English

Description

  • Content Description: The overall goal of this project is to assess the economic feasibility of CO{sub 2} flooding the naturally fractured Spraberry Trend Area in West Texas. This objective is being accomplished by conducting research in four areas: (1) extensive characterization of the reservoirs, (2) experimental studies of crude oil/brine/rock (COBR) interaction in the reservoirs, (3) reservoir performance analysis, and (4) experimental investigations on CO{sub 2} gravity drainage in Spraberry whole cores. This report provides results of the second year of the five-year project for each of the four areas. In the first area, the author has completed the reservoir characterization, which includes matrix description and detection (from core-log integration) and fracture characterization. This information is found in Section 1. In the second area, the author has completed extensive inhibition experiments that strongly indicate that the weakly water-wet behavior of the reservoir rock may be responsible for poor waterflood response observed in many Spraberry fields. In the third area, the author has made significant progress in analytical and numerical simulation of performance in Spraberry reservoirs as seen in Section 3. In the fourth area, the author has completed several suites of CO{sub 2} gravity drainage in Spraberry and Berea whole cores at reservoir conditions and reported in Section 4. The results of these experiments have been useful in developing a model for free-fall gravity drainage and have validated the premise that CO{sub 2} will recover oil from tight, unconfined Spraberry matrix. The final three years of this project involves implementation of the CO{sub 2} pilot. Up to twelve new wells are planned in the pilot area; water injection wells to contain the CO{sub 2}, three production wells to monitor performance of CO{sub 2}, CO{sub 2} injection wells including one horizontal injection well and logging observation wells to monitor CO{sub 2} flood fronts. Results of drilling these wells will be forthcoming.
  • Physical Description: 132 p.

Subject

  • STI Subject Categories: 02 Petroleum
  • Keyword: Oil Fields
  • Keyword: Progress Report
  • Keyword: Rock-Fluid Interactions
  • Keyword: Site Characterization
  • Keyword: Experimental Data
  • Keyword: Carbon Dioxide Injection
  • Keyword: Wettability
  • Keyword: Reservoir Rock
  • Keyword: Flow Models
  • Keyword: Texas

Source

  • Other Information: PBD: Jul 1998

Collection

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

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report

Format

  • Text

Identifier

  • Other: DE98007451
  • Report No.: DOE/BC/14942--6
  • Grant Number: FC22-95BC14942
  • DOI: 10.2172/663421
  • Office of Scientific & Technical Information Report Number: 663421
  • Archival Resource Key: ark:/67531/metadc709603

Note

  • Display Note: OSTI as DE98007451