Assessing Technical and Economic Recovery of Oil Resources

4. Vacuum Field, Grayburg/San Andres Unit. The Vacuum Field is located on the Artesia-Lovington uplift in Lea County, New Mexico, approximately 15 miles northwest of thecity of Hobbs. The field was discovered in 1929, with primary developmentbeginning in 1939 and waterflooding beginning in 1958. The Grayburg/San AndresUnit is located on the eastern side of the Vacuum Field and has a reservoir area of19,200 acres, a MPZ OOIP of 999 MMbbls and a ROZ OIP of 781 MMbbls. TheMPZ is at a depth of 4,500 feet and has an average net thickness of 95 feet. TheROZ is at a depth of 4,847 feet and has an estimated net thickness of 194 feet,Figure 30, Vacuum–Grayburg/San Andres Unit Input Parameters. TheGrayburg/San Andres Unit has 466 active production wells and 172 active injectionwells. Cumulative MPZ oil production for the Grayburg/San Andres Unit is 356MMbbls with 25 MMbbls of this due to tertiary CO 2 flooding.5. Robertson Field, San Andres Reservoir. The Robertson Field has a reservoir area of6,000 acres, a MPZ OOIP of 7 MMbbls and a ROZ OIP of 94 MMbbls. The MPZ isat a depth of 4,700 feet and has an average net thickness of 2 feet. The ROZ is at adepth of 4,754 feet and has an estimated net thickness of 65 feet, Figure 31,Robertson Field Input Parameters. The Robertson Field has 3 active productionwells and no active injection wells. Cumulative MPZ oil production for the RobertsonField is 2 MMbbls. CO 2 flooding has not been performed in the Robertson SanAndres Reservoir.3-16