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Heating tar sands formations while controlling pressure

Patent ·
OSTI ID:1015188
Methods for treating a tar sands formation are described herein. Methods may include heating at least a section of a hydrocarbon layer in the formation from a plurality of heaters located in the formation. A pressure in the majority of the section may be maintained below a fracture pressure of the formation. The pressure in the majority of the section may be reduced to a selected pressure after the average temperature reaches a temperature that is above 240.degree. C. and is at or below pyrolysis temperatures of hydrocarbons in the section. At least some hydrocarbon fluids may be produced from the formation.
Research Organization:
Shell Oil Company (Houston, TX); Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-00OR22725; AC04-94AL85000
Assignee:
Shell Oil Company (Houston, TX)
Patent Number(s):
7,644,765
Application Number:
11/975,713
OSTI ID:
1015188
Country of Publication:
United States
Language:
English

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