Method for determining formation parting pressure
US4793413A · kind A · utility
4Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Dec 21, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/008
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Fluid is injected into a wellbore at a first rate which is low enough to maintain formation pressure beneath formation parting pressure. Thereafter, the rate of fluid injection is increased to a second rate which is high enough to exceed formation parting pressure. The time and pressure data obtained during the first and second periods are normalized, plots thereof are superposed and the formation parting pressure is determined by noting the point at which the plots deviate from one another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.