Application of reservoir characterization and advanced technology to improve recovery and economics in a lower quality shallow shelf carbonate reservoir. Quarterly technical progress report, July 1--September 30, 1995
West Welch Unit is one of four large waterflood units in the Welch Field located in the Northwestern portion of Dawson County, Texas. The Welch Field was discovered in the early 1940`s and produces oil under a solution gas drive mechanism from the San Andres formation at approximately 4,800 ft. The field has been under waterflood for 30 years and a significant portion has been infilled drilled on 20-ac density. A 1982--86 pilot CO{sub 2} injection project in the offsetting South Welch Unit yielded positive results. The reservoir quality is poorer at the West Welch Unit because of its relative location of sea level during deposition. Because of the proximity of a CO{sub 2} source and the CO{sub 2} operating experience that would be available from the South Welch Unit, West Welch Unit is an ideal location for demonstrating methods for enhancing economics of IOR projects in lower quality SSC reservoirs. This Class 2 project concentrates on the efficient design of a miscible CO{sub 2} project based on detailed reservoir characterization from advanced petrophysics, 3-D seismic interpretations and cross wellbore tomography interpretations. During the quarter, substantial progress was made in both the petrophysical analyses and the tomography processing. Both of these phases are running behind schedule. The geologic model is dependent upon the petrophysical analysis and the seismic and tomography interpretations. The actual reservoir simulation cannot start until the geologic model is complete, although all the preliminary simulation work is being done.
- Research Organization:
- Oxy USA, Inc., Midland, TX (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FC22-94BC14990
- OSTI ID:
- 161507
- Report Number(s):
- DOE/BC/14990-5; ON: DE96003285; TRN: AHC29601%%62
- Resource Relation:
- Other Information: PBD: [1995]
- Country of Publication:
- United States
- Language:
- English
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