Hydraulic fracturing process using a polymer gel

Patent · Tue Oct 25 00:00:00 EDT 1988

OSTI ID:6544862

Sydansk, R D

This patent describes a fracturing process applied to a subterranean hydrocarbon-bearing formation below an earthen surface in fluid communication with a wellbore comprising: (a) premixing a fracturing fluid at the surface comprising a gel breaker and a gelation solution consisting essentially of an aqueous solvent, a water-soluble acrylamide polymer selected from the group consisting of polyacrylamide and partially hydrolyzed polyacrylamide, and a crosslinking agent formed of at least one chromium III species complexed with at least one carboxylate species selected from the group consisting of propionate, acetate, lactate, and mixtures thereof; (b) at least partially gelling the gelation solution at the surface to form a gel; and (c) injecting the fracturing fluid into the formation via the wellbore at a pressure sufficient to hydraulically fracture the formation.

• Assignee: Marathon Oil Co., Findlay, OH
• Patent Number(s): US 4779680
• OSTI ID: 6544862
• Resource Relation: Patent File Date: Filed date 13 May 1987
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
FRACTURING FLUIDS
CHEMICAL COMPOSITION
OIL WELLS
HYDRAULIC FRACTURING
ACETATES
ACRYLAMIDE
CARBOXYLATION
CROSS-LINKING
ENHANCED RECOVERY
GELATION
GELS
LACTATES
ORGANIC NITROGEN COMPOUNDS
PETROLEUM
POLYMERS
SOLVENT PROPERTIES
WELL STIMULATION
AMIDES
CARBOXYLIC ACID SALTS
CHEMICAL REACTIONS
COLLOIDS
COMMINUTION
DISPERSIONS
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FRACTURING
FUELS
ORGANIC COMPOUNDS
POLYMERIZATION
RECOVERY
STIMULATION
WELLS
020300* - Petroleum- Drilling & Production