Plugging solution precipitation time control by epoxide reaction

Patent · Tue Jul 24 04:00:00 EDT 1973

OSTI ID:5005510

Richardson, E A

The precipitation time of a precipitate-forming aqueous solution containing a polyvalent metal that precipitates as a gelatinous metal hydroxide and a reactant that raises the pH to cause the precipitation is controlled, and/or precipitation at temperatures above about 130/sup 0/F is inhibited, by dissolving in the aqueous solution a reactive mixture of halide ions and an epoxide. Such solutions are useful in numerous well treating, fluid diverting or permeable material plugging operations. They are generally useful wherever it is desirable to flow an aqueous solution having a selected mobility into a selected location at which the mobility of the solution becomes significantly less. These solutions can be used in treating wells and/or boreholes for purposes such as: plugging portions of a subterranean reservoir from which (or into which) it is no longer desirable to produce (or inject) fluid; plugging an earth formation to shutoff an intrusion of water into a gas-drilled well borehole; improving the uniformity of the injection profile of a reservoir interval; pretreating the borehole of a well in which a casing is to be cemented to supplement the sealing effect of the cement; and preventing or controlling the loss of fluid that is being circulated within a well or borehole, etc. (2 claims)

• Assignee: Shell Oil Co
• Patent Number(s): US 3747677
• OSTI ID: 5005510
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
AQUEOUS SOLUTIONS
CONTROL
DISPERSIONS
EPOXIDES
HALIDES
HALOGEN COMPOUNDS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PLUGGING
PRECIPITATION
RESERVOIR ROCK
SEPARATION PROCESSES
SOLUTIONS
TEMPERATURE EFFECTS
WATER INFLUX