发明名称 |
Method for treating underground formations |
摘要 |
Disclosed is a method for treating subterranean formations such as underground petroleum-containing formations penetrated by a well, and particularly a formation penetrated by a producing well which formation contain a plurality of zones, one or more of which are producing petroleum and one or more of which are producing water. The treatment selectively reduces the permeability of the water-producing intervals without adversely affecting the permeability of the oil producing intervals, thereby reducing the production of water and reducing the water-oil ratio of the fluid being produced from the well. The treatment method involves introducing an effective amount of a liquid comprising a hydrocarbon having dispersed therein an unhydrated water swellable clay such as bentonite, a sodium montmorillonite. The clay swells on contacting water in the water-producing intervals and plugs or reduces the permeability of the flow channels in the water-producing intervals.
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申请公布号 |
US4261422(A) |
申请公布日期 |
1981.04.14 |
申请号 |
US19780958597 |
申请日期 |
1978.11.07 |
申请人 |
TEXACO INC. |
发明人 |
WHITE, NIKOLAS F.;NOLES, JOHN R.;WALKER, CLARENCE O. |
分类号 |
C09K8/502;E21B43/32;(IPC1-7):E21B43/22 |
主分类号 |
C09K8/502 |
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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