Effects of geologic heterogeneity on waterflood efficiency at Jordan field, University lands, Ector and Crane Counties, Texas
Jordan field produces oil from the Permian (Guadalupian) San Andres Formation at a depth of approximately 3500 ft on the east flank of a low, broad anticline located on the eastern side of the Central Basin platform in the Permian basin of west Texas. Since discovery in 1937, the portion of the field on university lands has produced 68 million of the 175 million bbl of original oil in place. An estimated 55 million bbl of mobile oil remain in this reservoir. The upper San Andres Formation at Jordan field comprises approximately 400 ft of upward-shoaling subtidal to peritidal carbonate strata now thoroughly dolomitized and partially cemented by sulfates. Peritidal facies are nonporous mudstone and generally nonporous pisolitic packstone and grainstone characterized by abundant sulfate cement. Where sulfate cement is either leached or absent from fenestrae, the pisolitic rocks are locally porous and permeable. Subtidal facies are primary pellet grainstone containing fusulinids and crinoids; local bioherms composed of bryozoans, algae, and corals; and skeletal grainstone composing associated flanking beds. The lower subtidal section is characterized by a stratigraphically distinct zone that has been diagenetically altered by a postburial leaching event. This diagenetic alteration has increased permeability.
- Research Organization:
- Univ. of Texas, Austin (USA)
- OSTI ID:
- 5876383
- Report Number(s):
- CONF-890404-
- Journal Information:
- AAPG Bull.; (United States), Journal Name: AAPG Bull.; (United States) Vol. 73:3; ISSN AABUD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
ANTICLINES
CARBONATE ROCKS
ENERGY SOURCES
ENHANCED RECOVERY
FEDERAL REGION VI
FLUID INJECTION
FOSSIL FUELS
FUELS
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC FORMATIONS
GEOLOGIC STRUCTURES
GEOLOGY
MINERAL RESOURCES
NORTH AMERICA
OIL FIELDS
OIL WELLS
PALEOZOIC ERA
PERMIAN PERIOD
PETROLEUM
PETROLEUM DEPOSITS
RECOVERY
RESERVOIR ROCK
RESOURCES
ROCKS
SEDIMENTARY ROCKS
TEXAS
USA
WATERFLOODING
WELLS