Process for reducing the permeability of porous rock
Porous rock may be rendered impermeable by injecting into it at a pressure greater than the back pressure of the ground water and in excess of 10 psi, an aqueous solution of resorcinol and formaldehyde. The solution has a pH between 7 and 10 in which the combined weight of the resorcinol and formaldehyde is between 3 and 25% by wt of the whole. The formaldehyde is present in an amount sufficient to provide at least 1 molar equivalent per mole of resorcinol. If desired, the setting rate may be accelerated by the incorporation of an inorganic salt, such as sodium chloride, potassium chloride, sodium nitrate, sodium chromate or magnesium chloride or a mixture of 2 or more. A first solution is prepared which consists of resorcinol, water, and an alkali, and a second solution consisting of water and formaldehyde. The preferred alkali is sodium hydroxide. The 2 solutions are then admixed immediately prior to injection or during injection. (8 claims)
- Assignee:
- Borden Chemical Co., Ltd.
- Patent Number(s):
- GB 1292633
- OSTI ID:
- 6389451
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
ALDEHYDES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AROMATICS
CHLORIDES
CHLORINE COMPOUNDS
DEVELOPERS
ENERGY SOURCES
FORMALDEHYDE
FOSSIL FUELS
FUELS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
HYDROXY COMPOUNDS
MAGNESIUM CHLORIDES
MAGNESIUM COMPOUNDS
MATERIALS
NITRATES
NITROGEN COMPOUNDS
OIL WELLS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PERMEABILITY
PETROCHEMICALS
PETROLEUM
PETROLEUM PRODUCTS
PHENOLS
PLASTICS
PLUGGING
POLYMERS
POLYPHENOLS
POROUS MATERIALS
RESORCINOL
SAND CONSOLIDATION
SODIUM CHLORIDES
SODIUM COMPOUNDS
SODIUM HYDROXIDES
SODIUM NITRATES
SYNTHETIC MATERIALS
WELLS