Novel compositions suitable for treating deep wells
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United States of America Patent
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Oct 20, 1987
Grant Date -
N/A
app pub date -
Feb 18, 1986
filing date -
Feb 28, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A viscosity-increased liquid carbon dioxide fracturing fluid is provided for the treatment of subterranean gas-bearing formations. The composition comprises liquid carbon dioxide which has been thickened by the addition of a small amount of a copolymer which is the reaction product of liquid carbon dioxide and an alkene oxide, preferably propylene oxide. The use of the copolymer thickener provides a CO.sub.2 fracturing fluid which may be pumped at a high rate, will not readily boil or foam, will carry a propping agent and will completely degrade within the formation.
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