发明名称 |
CHELATING AGENT-BASED SELF-DIVERTING ACIDIZING FLUIDS AND METHODS FELATING THERETO |
摘要 |
Methods, compositions and systems relating to complexing-acidizing treatment fluids. Some methods include: providing or preparing a complexing-acidizing treatment fluid having an acid concentration of about 0.6 Molar, the complexing-acidizing treatment fluid including: an aminopolycarboxylic acid chelating agent, an aqueous base fluid, and an acid, placing the complexing-acidizing treatment fluid in a subterranean formation matrix penetrated by a well bore; allowing the acid to generate metal cations by dissolution of the subterranean formation matrix; reacting the aminopolycarboxylic acid chelating agent with the metal cations so as to form at least a plurality of aggregate blocking agents; and allowing the aggregate blocking agents to divert the complexing-acidizing treatment fluid to a main channel in the subterranean formation matrix that is distinct from a wormhole in the subterranean formation matrix. |
申请公布号 |
US2015260021(A1) |
申请公布日期 |
2015.09.17 |
申请号 |
US201314373717 |
申请日期 |
2013.08.30 |
申请人 |
Halliburton Energy Services, Inc. |
发明人 |
Reyes Enrique Antonio;Beuterbaugh Aaron Michael;Smith Alyssa Lynn;Smith Christopher Lynn |
分类号 |
E21B43/16;C09K8/42;C09K8/74;C09K8/528 |
主分类号 |
E21B43/16 |
代理机构 |
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代理人 |
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主权项 |
1. A method comprising:
providing or preparing a complexing-acidizing treatment fluid having an acid concentration of about 0.6 Molar, the complexing-acidizing treatment fluid comprising: an aminopolycarboxylic acid chelating agent, an aqueous base fluid, and an acid, placing the complexing-acidizing treatment fluid in a subterranean formation matrix penetrated by a well bore; allowing the acid to generate metal cations by dissolution of the subterranean formation matrix; reacting the aminopolycarboxylic acid chelating agent with the metal cations so as to form at least a plurality aggregate blocking agents; and allowing the aggregate blocking agents to divert the complexing-acidizing treatment fluid to a main channel in the subterranean formation matrix that is distinct from a wormhole in the subterranean formation matrix. |
地址 |
Houston TX US |