Method and fluid for placing resin coated gravel or sand in a producing oil well

Patent · Tue Jan 23 04:00:00 EST 1990

OSTI ID:7181285

Friedman, R H; Suries, B W

This patent describes an improvement in a method for forming a consolidated gravel pack in a washed out cavity adjacent to a producing well penetrating a subterranean oil formation. It comprises: the steps of suspending resin coated gravel in a viscous aqueous carrier fluid and pumping the gravel into the portion of the formation where it is desired to form the consolidated gravel pack, the gravel particles being suspended in an viscous aqueous fluid containing hydroxyethylcellulose and a fluorescent dye and having an initial pH in the range of from 6 to 8. The improvement comprises incorporating in the viscous aqueous carrier fluid an acid anhydride which reacts with the water component of the aqueous carrier fluid to form an acid, reducing the pH of the fluid to a value less than about 6 in from 2 to 6 hours which causes the viscosity of the aqueous carrier fluid to be reduced, thereby permitting the resin coated sand particles to come into close contact in order to form a dense permeable gravel pack.

• Assignee: Texaco Inc., White Plains, NY
• Patent Number(s): A; US 4895207
• Application Number: PPN: US 7-285996A
• OSTI ID: 7181285
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
AQUEOUS SOLUTIONS
BACKFILLING
COATINGS
DISPERSIONS
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLES
PERMEABILITY
PETROCHEMICALS
PETROLEUM PRODUCTS
PH VALUE
POLYMERS
RESINS
SAND
SOLUTIONS
TECHNOLOGY ASSESSMENT
WELL COMPLETION
WELLS