Methods for downhole sampling of tight formations
US8397817B2 · kind B2 · utility
8Cited by
25References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2010 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Jun 24, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/26
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
There is provided a method of sampling a subterranean formation. The method includes the steps of creating a side bore into the wall of a well traversing the formation, sealing the wall around the side bore to provide a pressure seal between the side bore and the well, pressurizing the side bore beyond a pressure inducing formation fracture while maintaining the seal, pumping a fracturing fluid adapted to prevent a complete closure of the fracture through the side bore into the fracture, and reversing the pumping to sample formation fluid through the fracture and the side bore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.