Patent · US Expired

Method for initiating an in-situ recovery process by the introduction of oxygen

US4042026A · kind A · utility

279Cited by

5References

15Claims

0Family size

Assignee

Deutsche Texaco Aktiengesellschaft · DE

Inventors

Gunter Pusch · Neckargemünd, DE
Heinz Jurgen Klatt
Walter Frohlich · Altötting, DE

Key dates

Filing date	Feb 5, 1976
Grant date	Aug 16, 1977
Priority date	—
Expiry date	Feb 5, 1996

Classification

Technology area (CPC E)Fixed Constructions
CPC primaryE21B43/243
WIPO fieldCivil engineering
WIPO sectorOther fields

Abstract

A method for starting a process to recover energy raw materials from a subterranean formation whereby igniters are injected into the upper region of the formation and inert gas is injected into the lower region of the formation, and thereafter an oxygen-containing gas is injected at a predetermined oxygen concentration and rate to initiate combustion, followed by increasing the oxygen concentration and/or rate of the injected gas to a maximum value.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.