Characterization of the Austin Chalk producing trend

Conference · Wed Jan 01 00:00:00 EST 1986

OSTI ID:7159790

Chen, H Y; Poston, S W; Wu, C H

Fracture patterns and reservoir dual characteristics are presented for a portion of the fractured Austin Chalk producing trend. The production histories of 1,235 wells from Giddings Field covering portions of Lee, Burleson, Washington, and Fayette counties were analyzed by decline curve analysis. Production of the average Austin Chalk well is usually characterized by an early rapid decline and a later slow decline. The average initial effective decline rate is about 90% per year, and lasts about six months to one year. For the later, less dramatic decline, the average is about 35% per year. Statistical results of well performance indicate no difficulty in finding oil in the Austin Chalk producing trend. However, areas of high fracture density must be encountered for a well to be profitable. A contour map of the iso-reserves was prepared for a better understanding of the fracture system and reservoir characteristics. Besides the general northeast-southwest production trend, the map shows anomalies in the fracture system and reservoir characteristics. A simple, rapid technique to estimate reservoir parameters directly from the double-decline behavior of log (rate) versus time curves is given. Values of flow capacity, storage capacity, dimensionless fracture storage parameter (..omega..), and dimensionless interporosity flow parameter (lambda) can be estimated by this technique.

• Research Organization: Texas AandM Univ.
• OSTI ID: 7159790
• Report Number(s): CONF-861080-
• Resource Relation: Conference: Society of Petroleum Engineers annual technical conference and exhibition, New Orleans, LA, USA, 5 Oct 1986
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
FRACTURED RESERVOIRS
HYDRODYNAMICS
MAPS
SATURATION
OIL WELLS
PERFORMANCE
PRODUCTION
TEXAS
OIL FIELDS
ANNUAL VARIATIONS
CALCULATION METHODS
DENSITY
FLUID FLOW
GEOLOGIC FRACTURES
LIMESTONE
MICROSTRUCTURE
POROSITY
RESERVOIR FLUIDS
STATISTICS
WELL LOGGING
CARBONATE ROCKS
CRYSTAL STRUCTURE
FEDERAL REGION VI
FLUID MECHANICS
FLUIDS
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MATHEMATICS
MECHANICS
MINERAL RESOURCES
NORTH AMERICA
PETROLEUM DEPOSITS
PHYSICAL PROPERTIES
RESOURCES
ROCKS
SEDIMENTARY ROCKS
USA
VARIATIONS
WELLS
020300* - Petroleum- Drilling & Production