Methods of using strong acids modified with acid solutions

Patent · Tue Jun 23 00:00:00 EDT 1987

OSTI ID:6451024

Martucci, D J

This method describes a method for acidizing wells surrounded by clay or silicate formations, the method comprising the steps of: (a) mixing water and hydrochloric acid with relatively smaller amounts of phosphoric, oxalic and citric acids and urotropine to form a first solution, the hydrochloric acid present in the first solution having a concentration of 1-60 percent by weight of the first solution. The phosphoric acid present in the first solution has a concentration of 0.2 percent by weight of the first solution. The oxalic acid present in the first solution has a concentration of 0.1-10 percent by weight of the first solution; and the citric acid present in the first solution has a concentration of 0.1-25 percent by weight of the first solution; (b) forming a second solution by mixing a portion of the first solution with additional hydrochloric acid; (c) forming a third solution by mixing the remaining portion of the first solution with hydroflouric acid; (d) forming a fourth solution by mixing the second and third solutions; and (e) introducing the fourth solution into the well and into contact with the clay or silicate formations.

• Assignee: An-Son Petrochemical, Inc., Miami, FL
• Patent Number(s): US 4675120
• OSTI ID: 6451024
• Resource Relation: Patent File Date: Filed date 14 Jul 1983
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
NATURAL GAS WELLS
ACIDIZATION
OIL WELLS
CITRIC ACID
CLAYS
ENHANCED RECOVERY
HYDROCHLORIC ACID
HYDROFLUORIC ACID
MIXING
NATURAL GAS
OXALIC ACID
PETROLEUM
PHOSPHORIC ACID
QUANTITY RATIO
SILICATES
UROTROPIN
WELL STIMULATION
AMINES
CARBOXYLIC ACIDS
DICARBOXYLIC ACIDS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
HYDROGEN COMPOUNDS
HYDROXY ACIDS
INORGANIC ACIDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
RECOVERY
SILICON COMPOUNDS
STIMULATION
WELLS
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