Composition and method using temporary solid diverting agent for aqueous fluids

Patent · Tue Nov 25 04:00:00 EST 1969

OSTI ID:5268145

Eilers, L H

In the treatment of a fluid-bearing subterranean formation penetrated by a well bore, e.g., by injecting an acidizing or fracturing fluid into such formation to stimulate the flow of the natural fluid toward the well bore, there is often a need for incorporating into such injected fluid an agent which temporarily inhibits too rapid dissipation of the injected fluid through existing channels, fissures, and the like in the formation. Such a composition consists of a material made of whole or cracked natural grains or seeds, a particulated finely subdivided thickening agent, and an aqueous carrier or vehicle. The method of treating consists of injecting the composition down the well bore and forcing at least some of it into the formation. The material serves as a temporary plugging agent to divert fluid to less accessible or tighter portions of the formation. Phthalic anhydride is also advantageously employed as an ingredient in the composition to aid in break down of it, due to hydrolysis of the phthalic anhydride. (8 claims)

• Assignee: Dow Chemical Co.
• Patent Number(s): US 3480084
• OSTI ID: 5268145
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACIDIZATION
ADDITIVES
CARBOXYLIC ACID SALTS
CEREALS
ENHANCED RECOVERY
FLUID INJECTION
GEOLOGIC FORMATIONS
GRAMINEAE
GRASS
NATURAL GAS WELLS
OIL WELLS
PERMEABILITY
PHTHALATES
PLANTS
PLUGGING
RECOVERY
RESERVOIR ROCK
SEEDS
STIMULATION
WELL STIMULATION
WELLS