公开(公告)号：US3876438A

公开(公告)日：1975-04-08

申请号：US33242873

申请日：1973-02-14

申请人： GETTY OIL CO

发明人： FRIEDMAN ROBERT H ,  KRAUSE JULIANNE D ,  BRADFORD WILLIAM R

IPC分类号： C09K8/88 ,  E21B43/26 ,  C08B27/42 ,  C08B27/64

CPC分类号： C09K8/887 ,  E21B43/261

摘要： A composition is provided for use in selectively plugging waterrich strata of a subterranean formation so that the oil-to-water ratio of production will be increased, said composition including in preferred embodiments an aqueous solution of sodium carboxymethylcellulose, chromium potassium sulfate, and orthocresol. Methods for selective plugging are provided which include injection of a selective plugging composition into subterranean formations having water-rich and oil-rich strata whereupon the material, after a significant period of time, assumes a much greater viscosity in the water-rich strata. Pretreatment and post-treatment options are provided for improving results under certain conditions.

公开(公告)号：US3827898A

公开(公告)日：1974-08-06

申请号：US34883773

申请日：1973-04-06

申请人： HERCULES INC

发明人： PODLAS T

IPC分类号： C08B11/20 ,  C09K8/588 ,  C09K8/62 ,  C08B21/26 ,  C08B27/64

CPC分类号： C08B11/20 ,  C09K8/588 ,  C09K8/62 ,  Y10S507/922 ,  Y10S507/936

摘要： THE RATE OF DEGRADATION OF NON-IONIC CELLULOSE ETHERS UNDER THE INFLUENCE OF A PEERSULFATE OXIDIZING AGENT IS REDUCED AND REGULATED BY THE ADDITION OF SMALL AMOUNTS OF A DIVALENT MANGANESE COMPOUND INTO A SOLUTION OF THE ETHER AND THE OXIDIZER.

公开(公告)号：US3464840A

公开(公告)日：1969-09-02

申请号：US3464840D

申请日：1965-01-04

申请人： INT PAPER CANADA

发明人： MACDONALD DONALD M

IPC分类号： C08B1/08 ,  C08B3/22 ,  C08L1/00 ,  D01F2/08 ,  C08B27/64

CPC分类号： C08L1/00 ,  C08B1/08 ,  C08B3/22 ,  D01F2/10