|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||166/295 ; 166/300|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 11 인용 특허 : 36|
A process for decreasing the water permeability of a subterranean rock formation is disclosed. The process involves the use of a water-soluble polymer in conjunction with an aluminum citrate preparation. The polymer can be injected into the formation first, followed by injection of the aluminum citrate preparation. Alternatively, an aqueous solution comprising both the polymer and the aluminum citrate preparation can be injected into the subterranean formation. Yet another process includes mixing a dry composition comprising the polymer and the aluminum ...
A process for decreasing the water permeability of a subterranean formation comprising: a. injecting into the formation an aqueous solution comprising a water-soluble polymer capable of cross linking in the presence of water and aluminum ions; b. subsequently injecting into the formation an aqueous solution comprising aluminum citrate having at least about 3.1 percent by weight aluminum, a pH between about 5.0 and about 9.0 and a molar ratio of aluminum to citrate at most about 2.2:1 in an amount sufficient to enhance cross linking of said polymer.