05314017 is referenced by 9 patents and cites 4 patents.

The invention relates to assisting the recovery of petroleum from vertically fractured formations utilizing carbon dioxide gas to lower the interfacial tension between the gas and the petroleum in the vertical fractures and in the formation matrix adjacent the vertical fractures to cause vertical drainage of the petroleum down the fracture system. The invention also includes a method for identifying vertically fractured formations which may be particularly susceptible to such recovery with carbon dioxide gas using the capillary to gravity ratio (1/N.sub.B) to select formations having a value for such ratio of 0.2 or less.

Title
Method of assisting the recovery of petroleum in vertically fractured formations utilizing carbon dioxide gas to establish gravity drainage
Application Number
7/957043
Publication Number
5314017
Application Date
October 5, 1992
Publication Date
May 24, 1994
Inventor
Franklin M Orr Jr
Stanford
CA, US
Dengen Zhou
Mountain View
CA, US
David S Schechter
E. Palo Alto
CA, US
Agent
Townsend and Townsend Khourie and Crew
Assignee
Board of Trustees of the Leland Stanford Junior University
CA, US
IPC
E21B 47/10
E21B 47/00
E21B 43/16
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