| 摘要 |
<p>A subterranean formation is temporarily plugged or sealed by introducing a rapidly viscosifying liquid hydrocarbon composition into the formation, the composition being made by mixing a first component comprising an alkyl orthophosphate acid ester and an alkali metal hydroxide present in an amount sufficient to at least partially neutralize said ester, and a second component comprising an amine complex resulting from the reaction of an aqueous source of aluminium or ferric ions and a C8 - C18 surface active amine in the presence of a water miscible organic solvent, with the liquid hydrocarbon. The composition rapidly viscosifies to a level sufficient to temporarily plug or seal a subterranean formation or wellbore into which it is introduced.</p> |
