Sand control agent and process

Patent · Tue Jun 29 04:00:00 EDT 1993

OSTI ID:6455487

Shu, P; Strom, E T; Donlon, W P

A method is described for forming a consolidated gravel pack in a washed-out interval adjacent to a borehole in an unconsolidated or loosely consolidated formation comprising: (a) perforating a cased borehole at an interval of the formation having a washed-out interval adjacent said borehole; (b) placing sand into said washed-out interval via perforations in the borehole; (c) injecting an aqueous silicate solution into said interval through perforations contained in the borehole which silicate is of a strength sufficient to react with a water-miscible organic solvent containing an alkylpolysilicate and a member of the group consisting of an inorganic salt, organic salt, or chelated calcium thereby forming a permeability retentive cement where said aqueous silicate is selected from a member of the group consisting of alkali metal silicate, organoammonium silicate, or ammonium silicate; (d) injecting next a spacer volume of water-immiscible hydrocarbonaceous liquid into said zone; and (e) injecting thereafter a water-miscible organic solvent containing an alkylpolysilicate and said group member into said interval in an amount sufficient to react with the aqueous silicate so as to form a silicate cement with permeability retentive characteristics whereupon the interval is consolidated in a manner sufficient to form a gravel pack thereby preventing sand from being produced from the formation during the production of hydrocarbonaceous fluids.

• Assignee: Mobil Oil Corp., Fairfax, VA (United States)
• Patent Number(s): A; US 5222557
• Application Number: PPN: US 7-810585
• OSTI ID: 6455487
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300 -- Petroleum-- Drilling & Production
42 ENGINEERING
422000* -- Engineering-- Mining & Underground Engineering-- (1980-)
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AMMONIUM COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
CEMENTS
FLUID INJECTION
GRANULAR MATERIALS
MATERIALS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
PACKINGS
PERFORATION
PERMEABILITY
SAND CONSOLIDATION
SILICATES
SILICON COMPOUNDS
SOLVENTS
WELL SERVICING
WELLS