Method for isolating hydrocarbon-containing formations intersected by a well drilled for the purpose of producing hydrocarbons therethrough
US5934377A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1997 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Jun 3, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/12
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for isolating subterranean formations or zones intersected by a single wellbore is provided. The method comprises perforating a zone intersected by the wellbore and pumping a sealing means into the wellbore to seal against the side of the casing above and below the perforations to prevent communication from the zone into the wellbore after the casing has been perforated. The method further comprises fracturing the zone through the perforations prior to sealing and thus isolating the zone. Other zones thereabove are likewise perforated, fractured, sealed and thus isolated by pumping sealing means into the wellbore to seal the casing adjacent the perforations to prevent communication from the affected zones into the wellbore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.