发明名称 |
Methods and compositions for fracturing subterranean formations |
摘要 |
A method of fracturing a subterranean formation which surrounds a well bore comprises the steps of providing a fracturing fluid, and injecting the fracturing fluid into the well bore at a pressure sufficient to form fractures in the subterranean formation which surrounds the well bore. The pressure is then released from the fracturing fluid, after which the fluid may be removed from the well and the well placed into production. The fracturing fluid comprises an aqueous liquid, a polysaccharide soluble or dispersible in the aqueous liquid in an amount sufficient to increase the viscosity of the aqueous liquid, an enzyme breaker which degrades said polysaccharide at a temperature above 180 DEG F. Fracturing fluid compositions and enzyme breaker systems useful for carrying out the invention are also disclosed.
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申请公布号 |
US5421412(A) |
申请公布日期 |
1995.06.06 |
申请号 |
US19940209679 |
申请日期 |
1994.03.10 |
申请人 |
NORTH CAROLINA STATE UNIVERSITY;UNIV PRINCETON |
发明人 |
KELLY, ROBERT M.;KHAN, SAAD A.;LEDUC, PASCAL;TAYAL, AKASH;PRUD'HOMME, ROBERT K. |
分类号 |
C09K8/62;C09K8/68;E21B43/267;(IPC1-7):E21B43/267 |
主分类号 |
C09K8/62 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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