Production chemicals. Adequate study necessary for scale removal

Journal Article · Fri Feb 01 04:00:00 EST 1980 · Drill Bit; (United States)

OSTI ID:6261334

Brewster, J

Over the years, numerous Permian Basin oil fields have experienced a buildup of calcium sulfate (GYP) scale. This resulted in severely curtailed production of thousands of wells. The condition is particularly prevalent in older fields which have been on production for many years. Such fields, principally in the Grayburg and San Andres horizons, abound in Ector and Andrews Counties and elsewhere in the central basin platform area. The magnitude of the problem can be understood by looking at production figures for a typical old W. Texas well before and after scale removal treatment. One well in the Foster Field just west of Odessa, before treatment, produced 2.5 bbl of oil and 4 bbl of water daily. Afterward, production increased to 50 bopd and 200 bpd of water. How much oil production increases depends on the formation. Four down-hole factors considered when undertaking GYP scale removal treatments are thief zones, well bore water, low pressure zones, and treating time.

• OSTI ID: 6261334
• Journal Information: Drill Bit; (United States), Journal Name: Drill Bit; (United States) Vol. 29:2; ISSN DRBIA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SULFATES
CLEANING
CONTROL
DESCALING
FEDERAL REGION VI
GEOLOGIC DEPOSITS
HYDROGEN COMPOUNDS
MINERAL RESOURCES
NORTH AMERICA
OIL FIELDS
OIL WELLS
OXYGEN COMPOUNDS
PERMIAN BASIN
PETROLEUM DEPOSITS
PLUGGING
PRODUCTION
RESOURCES
SCALE CONTROL
SULFATES
SULFUR COMPOUNDS
SURFACE FINISHING
TEXAS
USA
WATER
WELLS