Consolidation agent and method

Patent · Tue Feb 18 04:00:00 EST 1992

OSTI ID:5288778

Shu, P

This patent describes a sand consolidating method for an unconsolidated or loosely consolidated formation. It comprises perforating a cased borehole at an interval expected to produce fines or sand when producing hydrocarbonaceous fluids from the interval; injecting an aqueous solution of an alkali metal silicate into the interval through perforations contained in the borehole which solution is of a strength sufficient to react with an alcoholic solution of calcium salt to form a permeability retention cement; and injecting thereafter a solvent containing a calcium salt into the interval via the perforations in an amount sufficient to react with the alkali metal silicate so as to form a calcium silicate cement with permeability retention characteristics whereupon the interval is consolidated in a manner sufficient to prevent formation sand from being produced from the formation during the production of hydrocarbonaceous fluids, which solvent is selected from a member of the group consisting of methanol, ethanol, higher alcohols, ketones, tetrahydrofuran, and dimethyl sulfoxide.

• Assignee: Mobil Oil Corp., Fairfax, VA (United States)
• Patent Number(s): US 5088555; A
• Application Number: PPN: US 7-622586
• OSTI ID: 5288778
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030300 -- Natural Gas-- Drilling
Production
& Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
AQUEOUS SOLUTIONS
DISPERSIONS
DRILLING FLUIDS
EXTRACTION
FLUIDS
HYDROCARBONS
INJECTION WELLS
MIXTURES
OIL WELLS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SAND
SEPARATION PROCESSES
SILICATES
SILICON COMPOUNDS
SOLUTIONS
SOLVENT EXTRACTION
WELLS