New chemical retarder for acid systems
Conference
·
· Proc. Annu. Southwest. Pet. Short Course; (United States)
OSTI ID:6369672
Carbonate formations have been treated with acid for many years to increase fracture length and conductivity and thereby stimulate production. Fracture acidizing of carbonate formations requires consideration of several parameters, including the acid penetration distance, dynamic fracture geometry, and fracture conductivity. Acid penetration distances have been increased to various extents with chemically retarded acids, gelled acids, emulsified acids, and acid systems composed of hydrochloric, acetic, and/or formic acids. A new chemical retarder has been developed for use with emulsified and nonemulsified acids to help increase acid penetration into fractured limestone formations. The chemical retarder is chemically and physically adsorbed on the formation where it slows the reaction rate of acid, and the adsorption appears strong enough to withstand turbulent flow. This work discusses the laboratory evaluation of the new retarder's effect on acid penetration distances and reaction times with nonemulsified and emulsified hydrogen chloride and a formic acid mixture. Also discussed are acid placement techniques used in 21 Mexican wells with the new retarder and results of these techniques. 10 references.
- OSTI ID:
- 6369672
- Conference Information:
- Journal Name: Proc. Annu. Southwest. Pet. Short Course; (United States) Journal Volume: 27
- Country of Publication:
- United States
- Language:
- English
Similar Records
Viscous oils as retarders for high strength acid
New, low viscosity acid in oil emulsions
Retarded acid is more efficient
Conference
·
Wed Dec 31 23:00:00 EST 1969
· Am. Pet. Inst., Publ.; (United States)
·
OSTI ID:5377412
New, low viscosity acid in oil emulsions
Conference
·
Mon Dec 31 23:00:00 EST 1973
· Soc. Pet. Eng. AIME, Pap.; (United States)
·
OSTI ID:6636336
Retarded acid is more efficient
Journal Article
·
Fri Oct 01 00:00:00 EDT 1965
· Pet. Interam.; (United States)
·
OSTI ID:6895952
Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACETIC ACID
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACIDS
COLLOIDS
CONTROL
DEPOSITION
DEVELOPING COUNTRIES
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUELS
INHIBITION
LATIN AMERICA
MEXICO
MONOCARBOXYLIC ACIDS
NORTH AMERICA
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
PRODUCTIVITY
RECOVERY
RESERVOIR FLUIDS
SCALE CONTROL
STIMULATION
SYNTHESIS
WELL STIMULATION
WELLS
020300* -- Petroleum-- Drilling & Production
ACETIC ACID
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACIDS
COLLOIDS
CONTROL
DEPOSITION
DEVELOPING COUNTRIES
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUELS
INHIBITION
LATIN AMERICA
MEXICO
MONOCARBOXYLIC ACIDS
NORTH AMERICA
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
PRODUCTIVITY
RECOVERY
RESERVOIR FLUIDS
SCALE CONTROL
STIMULATION
SYNTHESIS
WELL STIMULATION
WELLS