An in situ combustion process entailing the simultaneous production of liquids and combustion gases that combines fluid drive gravity phase segregation and gravity drainage to produce hydrocarbons from a subterranean oil bearing formation comprising initially injecting a gas through a horizontal well placed high in ...

A well liner segment for use in hydrocarbon recovery processes. An elongate , typically cylindrical outer liner member, and an inner elongate liner member concentrically located therewithin is provided. Hydrocarbon upgrading catalyst is provided in the interstitial space between the two members. The outer liner memb...

A modified method of in situ recovery of hydrocarbon from an underground hydrocarbon-containing formation. An "L" shaped production well, having a vertical upper section, and a lower horizontally-extending leg which is positioned low in the hydrocarbon formation, is provided. The horizontal leg connects to the verti...

An in situ combustion process which process does not employ one or more separate gas venting wells. At least one vertical production well having a substantially vertical portion extending downwardly into the reservoir and a horizontal leg portion extending horizontally outwardly therefrom completed relatively low in...

A modified process for recovering oil from an underground reservoir using the toe-to-heel in situ combustion process. A diluent, namely a hydrocarbon condensate, is injected within a horizontal weltbore portion, preferably proximate the toe, of a vertical-horizontal well pair, or alternatively into an adjacent injec...

A process for improved safety and productivity when undertaking oil recovery from an underground reservoir by the toe-to-heel in situ combustion process employing a horizontal production well. Carbon dioxide which acts as a gaseous solvent, is injected into the reservoir for improving recovery in an in situ combusti...

For a fixed amount of steam injection, the average daily oil recovery rate increased with air injection rate. This is not unexpected since the volume of the sweeping fluid is increased. However, it is surprising that the total oil recovered decreases as air rate is increased. This is during the life of the air injec...