| 摘要 |
A gel composition for a conformance control operation in a subterranean formation, the composition being foamable with carbon dioxide, comprises a water soluble polymer, a crosslinking agent, a surfactant and a decomposing agent for releasing bicarbonates under subterranean conditions. The decomposing agent, which counteracts the detrimental effect of carbon dioxide on the gelling process, may be urea, a derivative of urea or sodium cyanate.
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