Method for determining the fluid saturation of an immobile phase in a reservoir
US4158957A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1978 |
| Grant date | Jun 26, 1979 |
| Priority date | — |
| Expiry date | Feb 16, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method is disclosed for determining the relative amounts of two fluid phases in a subterranean formation, one phase being mobile and the other being substantially immobile. A sweep fluid which is substantially free of the immobile fluid is injected into the formation by means of a well in an amount such that a measurable first portion of the sweep fluid in the formation adjacent the injection well remains unsaturated with the immobile fluid, and a second portion adjacent the first portion becomes saturated. The sweep fluid is then produced from the formation, preferably by means of the injection well. The concentration of immobile fluid dissolved in the produced sweep fluid is measured as a function of volume produced to determine the volumes of the two sweep fluid portions; these volumes are then used to calculate the relative amounts of the two fluid phases in the formation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.