发明申请
- 专利标题： Methods and compositions of controlling the rheology of a diutan-containing well treatment fluid at high temperatures
- 专利标题（中）： 在高温下控制含狄氏剂处理液的流变性的方法和组成
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申请号： US11077881申请日： 2005-03-11
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公开(公告)号： US20060205606A1公开(公告)日： 2006-09-14
- 发明人: Richard Pauls , Ian Robb , Bobby Burns
- 申请人： Richard Pauls , Ian Robb , Bobby Burns
- 专利权人： Halliburton Energy Services, Inc.
- 当前专利权人： Halliburton Energy Services, Inc.
- 主分类号： C09K8/00
- IPC分类号： C09K8/00 ; E21B43/00
摘要：
The invention provides a method for treating a subterranean formation penetrated by a wellbore, the method comprising the steps of formulating a treatment fluid and introducing the treatment fluid through the wellbore. The treatment fluid comprises water; diutan; and a sufficient amount of salt to increase the density of the treatment fluid to at least 8.5 lb/gal, wherein at least 50% by weight of the salt is selected from the group consisting of: bromide salts, non-bromide salts having a higher salting-in effect than bromide according to the Hofmeister series as measured by the salt's effect on the cloud point of poly(ethylene oxide) that has a molecular weight of 4×106, and any combination in any proportion thereof. The invention also provides a treatment fluid for use in a subterranean formation penetrated by a wellbore, the treatment fluid comprising: water; diutan; and a sufficient amount of salt to increase the density of the treatment fluid to at least 8.5 lb/gal, wherein at least 50% by weight of the salt is selected from the group consisting of: bromide salts, non-bromide salts having a higher salting-in effect than bromide according to the Hofmeister series as measured by the salt's effect on the cloud point of poly(ethylene oxide) that has a molecular weight of 4.106, and any combination in any proportion thereof.
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