In situ method and system for extraction of oil from shale

Details In situ method and system for extraction of oil from shale In situ method and system for extraction of oil from shale

2007-01-19

2010-06-29

Caldarola, Glenn A (Department: 1797)

Wells

Processes

Specific pattern of plural wells

C166S057000, C166S058000, C166S059000, C166S060000, C166S061000, C166S062000, C166S248000, C166S307000, C208S390000

Reexamination Certificate

active

07743826

ABSTRACT:
A system and process is disclosed for retorting oil shale and extracting shale oil and other hydrocarbons therefrom, in which a cased heat delivery well is drilled generally vertically through an overburden and then through a body of oil shale to be retorted to the bottom thereof, generally horizontally under the body of oil shale to be retorted, and then back to the earth surface. Heat energy is transmitted conductively to the body of oil shale to be retorted from a closed loop heat delivery module in the well, the module comprising a fluid transmission pipe containing a heating fluid heated to at least a retorting temperature. Heat energy is also transmitted to the body of oil shale to be retorted above the fluid transmission pipe by vapor conduits that conduct retort vapors upward through the body of oil shale to be retorted; the ascending retort vapors condense and reflux, delivering their latent heat of vaporization to the body of oil shale to be retorted, and the condensed retort liquids descend. If not recycled, the retort liquids are collected in a sump at the bottom of a production well and are transmitted to the surface for processing. The vapor conduits communicate at upper ends thereof with the production well, so that vapors that do not reflux are collected in the production well and are transmitted to the surface for processing.

REFERENCES:
patent: 5816325 (1998-10-01), Hytken
patent: 6712136 (2004-03-01), de Rouffignac et al.
patent: 6896053 (2005-05-01), Berchenko et al.
patent: 6997518 (2006-02-01), Vinegar et al.
patent: 2002/0074122 (2002-06-01), Kelley et al.
patent: 2007/0045266 (2007-03-01), Sandberg et al.
Garrouch, A.A. et al (2004). Journal of Petroleum Science and Engineering, 44, 283-301.
Hytken, Kent B., Facsimile Transmittal Sheet to Glenn Caldarola at the US Patent Office dated Jun. 17, 2009.

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