Method for suspending wells

Patent · Tue Apr 11 04:00:00 EDT 1989

OSTI ID:5968333

Jennings, Jr, A R

A method is described for filling and suspending a well which minimizes formation damage comprising: (a) directing a pumpable solidifiable gel mixture into a wellbore and into the productive interval of a formation which mixture contains an oxygen scavenger material selected from the group consisting of sodium thiosulfate and a short chain alcohol; (b) causing the gel mixture to become a solid thereby forming a gel plug within the wellbore and a formation gel within the formation sufficient to withstand environmental formation conditions and pressures which cause hydrocarbonaceous fluids to flow into the wellbore from the formation areas near the wellbore; and (c) placing in the wellbore on top of the plug an amount of cement sufficient to isolate the productive interval while being supported by the plug.

• Assignee: Mobil Oil Corp., New York, NY
• Patent Number(s): US 4819727
• OSTI ID: 5968333
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
03 NATURAL GAS
030900 -- Natural Gas-- Artificial Stimulation
Plowshare-- (-1989)
ALCOHOLS
ALKALI METAL COMPOUNDS
BUILDING MATERIALS
CEMENTS
COLLOIDS
DISPERSIONS
FORMATION DAMAGE
GELS
HYDROXY COMPOUNDS
MATERIALS
NATURAL GAS WELLS
OIL WELLS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PLUGGING
PLUGGING AGENTS
ROCK-FLUID INTERACTIONS
SODIUM COMPOUNDS
SODIUM SULFATES
STIMULATION
SULFATES
SULFUR COMPOUNDS
WELL SERVICING
WELL STIMULATION
WELLS