Control of crosslinking reaction rate using organozirconate chelate crosslinking agent and aldehyde retarding agent

Patent · Tue Oct 27 04:00:00 EST 1987

OSTI ID:5865156

Payne, K L

A process for fracturing a subterranean formation penetrated by a wellbore is described which comprises: preparing a base gel by mixing an aqueous fluid with a gelling agent selected from hydratable polysaccharides having a molecular weight in excess of 100,000 the gelling agent being present in an amount sufficient to gel the aqueous fluid; introducing the base gel into the wellbore in admixture with a crosslinking agent and retarding agent, the crosslinking agent comprising an organozirconate chelate present in an amount sufficient to crosslink the gelling agent, and the aldehyde retarding agent present in an amount sufficient to retard the action of the crosslinking agent upon the gelling agent; permitting the base gel to react with the crosslinking agent over a controllable period of time to form a crosslinked gel wherein the period of time over which the crosslinking reaction occurs is controllable by altering the amount of the retarding agent admixed with the base gel; and introducing the crosslinking gel into the formation from the wellbore at a flow rate and pressure sufficient to fracture the formation.

• Assignee: Dowell Schlumberger Inc., Houston, TX
• Patent Number(s): US 4702848
• OSTI ID: 5865156
• Country of Publication: United States
• Language: English

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ALDEHYDES
AQUEOUS SOLUTIONS
CARBOHYDRATES
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COLLOIDS
COMMINUTION
CROSS-LINKING
DISPERSIONS
ENERGY SOURCES
ENHANCED RECOVERY
FLUIDS
FOSSIL FUELS
FRACTURING
FRACTURING FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
GELATION
GELS
HYDRAULIC FRACTURING
MIXTURES
NATURAL GAS
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PETROLEUM
POLYMERIZATION
POLYSACCHARIDES
RECOVERY
ROCK-FLUID INTERACTIONS
SACCHARIDES
SOLUTIONS
STIMULATION
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
WELL STIMULATION
WELLS
ZIRCONATES
ZIRCONIUM COMPOUNDS