Method of increasing the permeability of subterranean reservoirs
US4194566A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1978 |
| Grant date | Mar 25, 1980 |
| Priority date | — |
| Expiry date | Oct 26, 1998 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/27
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of acidizing and/or fracturing a subterranean reservoir with a minimum of damage to the reservoir by the displacement fluid used to displace the acidizing or fracturing fluid into the reservoir and by the fluid used to kill the well wherein a restriction means having a seat for a closure means is located in a well conduit above a point of fluid entry into the reservoir, a slug of acidizing and/or fracturing fluid is injected into the reservoir, a slug of displacement fluid containing the closure means is injected down the well conduit, and a slug of weighted kill fluid is injected down the well conduit, said injection continuing until the closure means seats in the seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.