Recovery of viscous petroleum such as from tar sands isassisted using a controlled flow of hot fluid andhydrogen-generating gas in a flow path within the formation;thus a solid-wall hollow tubular member in the formation isused for conducting hot fluid to promote hydrogenation inconjunction with a hydrogen-generating gas and reduceviscosity of the petroleum to develop a potential passage inthe formation outside the tubular member into which a drivefluid is injected to promote movement of the petroleum to aproduction position.

Title
Methode et dispositif daffinage a chaud in situ
Method and apparatus for in-situ heated annulus refining process
Publication Number
2071351
Application Date
June 16, 1992
Publication Date
May 9, 1995
Inventor
Duerksen John H
Agent
SIM & MCBURNEY
Assignee
Chevron Research And Technology Company
IPC
E21B 43/24
View Original Source