High viscosity acidic treating fluids and methods of forming and using the same

Patent · Tue Feb 02 00:00:00 EST 1982

OSTI ID:6340195

Harris, L E

Acidizing and fracture acidizing procedures commonly are conducted in subterranean well formations to increase the recovery of hydrocarbons. High viscosity aqueous acid solutions prevent the acid from becoming prematurely spent and inactive and develops wider fractures so that live acid can be forced further into the formations. Acidic treating fluids are formed by combining a hydratable gelling agent capable of being cross-linked with metal ions and a zirconium cross-linking agent with an aqueous acid solution. When hydrated, the gelling agent increases the viscosity of the acid solution. The zirconium cross-linking agent cross-links the hydrated gelling agent thereby further increasing the viscosity and providing stability to the resulting viscous fluid. Hydratable gelling agents which are suitable for use are hydrophilic organic polymers having a high molecular weight and containing some carboxyl functionality whereby they can be cross-linked with metal ions. Examples of such polymers are substituted cellulose, substituted natural gums, acrylamides, methacrylamides, acrylates, methacrylates, maleic anhydrides, alkylvinyl ethers, vinyl alcohols and xanthan polymers. 14 claims.

• Assignee: Halliburton Co.
• Patent Number(s): US 4313834
• OSTI ID: 6340195
• Resource Relation: Patent Priority Date: Priority date 2 Oct 1978, United States of America (USA)
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
FRACTURING FLUIDS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
VISCOSITY
NATURAL GAS WELLS
ACIDIZATION
OIL WELLS
ACRYLAMIDE
ACRYLATES
CELLULOSE
CROSS-LINKING
GUMS
HYDRATION
ORGANIC POLYMERS
WELL STIMULATION
XANTHUM GUM
ZIRCONIUM COMPOUNDS
AMIDES
CARBOHYDRATES
CARBOXYLIC ACID SALTS
CHEMICAL REACTIONS
FLUIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
POLYMERIZATION
POLYMERS
POLYSACCHARIDES
SACCHARIDES
SOLVATION
STIMULATION
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
WELLS
020300* - Petroleum- Drilling & Production
030900 - Natural Gas- Artificial Stimulation
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