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

Patent · Tue Feb 02 04:00:00 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
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030900 -- Natural Gas-- Artificial Stimulation
Plowshare-- (-1989)
ACIDIZATION
ACRYLAMIDE
ACRYLATES
AMIDES
CARBOHYDRATES
CARBOXYLIC ACID SALTS
CELLULOSE
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CROSS-LINKING
FLUIDS
FRACTURING FLUIDS
GUMS
HYDRATION
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERIZATION
POLYMERS
POLYSACCHARIDES
SACCHARIDES
SOLVATION
STIMULATION
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
VISCOSITY
WELL STIMULATION
WELLS
XANTHUM GUM
ZIRCONIUM COMPOUNDS