07798221 is referenced by 119 patents and cites 951 patents.

An oil shale formation may be treated using an in situ thermal process. Heat may be applied to the formation to raise a temperature of a portion of the formation to a pyrolysis temperature. Heat input into the formation may be controlled to raise the temperature of portion at a selected rate during pyrolysis of hydrocarbons within the formation. A mixture of hydrocarbons, H2, and/or other formation fluids may be produced from the formation. The mixture may be separated into condensable hydrocarbons and non-condensable hydrocarbons. The condensable hydrocarbons removed from the formation may be a high quality oil that has a relatively low olefin content and a relatively high API gravity.

Title
In situ recovery from a hydrocarbon containing formation
Application Number
11/809723
Publication Number
7798221 (B2)
Application Date
May 31, 2007
Publication Date
September 21, 2010
Inventor
Frederick Gordon Carl
Houston
TX, US
Lanny Gene Schoeling
Katy
TX, US
Robert Charles Ryan
Houston
TX, US
Robert Martijn Van Hardeveld
Rotterdam
NL
Ajay Madhav Madgavkar
Katy
TX, US
Charles Robert Keedy
Houston
TX, US
Thomas David Fowler
Houston
TX, US
John Matthew Coles
Katy
TX, US
James Louis Menotti
Dickinson
TX, US
Gordon Thomas Shahin
Bellaire
TX, US
Etuan Zhang
Houston
TX, US
Kevin Albert Maher
Bellaire
TX, US
George Leo Stegemeier
Houston
TX, US
Ilya Emil Berchenko
Friendswood
TX, US
John Michael Karanikas
Houston
TX, US
Eric Pierre de Rouffignac
Rijswijk
NL
Scott Lee Wellington
Bellaire
TX, US
Harold J Vinegar
Bellaire
TX, US
Assignee
Shell Oil Company
TX, US
IPC
E21B 36/04
E21B 43/24
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