发明授权
US5425421A Method for sealing unwanted fractures in fluid-producing earth formations
失效
用于密封流体生产地层中不想要的裂缝的方法
- 专利标题: Method for sealing unwanted fractures in fluid-producing earth formations
- 专利标题(中): 用于密封流体生产地层中不想要的裂缝的方法
-
申请号: US132002申请日: 1993-10-05
-
公开(公告)号: US5425421A公开(公告)日: 1995-06-20
- 发明人: James R. Coleman , Steven D. Crane , Quintin J. Lai
- 申请人: James R. Coleman , Steven D. Crane , Quintin J. Lai
- 申请人地址: CA Los Angeles
- 专利权人: Atlantic Richfield Company
- 当前专利权人: Atlantic Richfield Company
- 当前专利权人地址: CA Los Angeles
- 主分类号: C09K8/512
- IPC分类号: C09K8/512 ; E21B33/138 ; E21B43/26 ; F02B3/06
摘要:
Hydraulic fractures which extend between a hydrocarbon fluid producing zone of an earth formation and a water-producing zone are sealed with respect to the water-producing zone by simultaneously injecting a non-sealing fluid such as crude oil, diesel fuel or brine into the portion of the fracture extending within the hydrocarbon producing zone and injecting a settable gel composition such as a polyacrylamide polymer cross-linked with inorganic transition metals into the portion of the fracture extending within the water-producing zone. The flow rates of the simultaneously pumped fluids are controlled in accordance with the ratio of the respective fracture heights and the viscosity and density of the respective sealing and non-sealing fluids. One fluid is typically pumped through the well annulus while the other fluid is pumped through a tubing string which is sealed from the annulus by a conventional packer disposed at the interface between the hydrocarbon and water-bearing zones.
公开/授权文献
信息查询