04305463 is referenced by 302 patents and cites 21 patents.

Disclosed are systems for removing hydrocarbons from subterranean deposits thereof. A fluid-impervious barrier screen is formed to isolate parts of the deposit or to isolate the deposit from adjacent fluid-permeable earth formations. The barrier screens are formed by fracturing a vertical zone in the formation by micropercussive fracturing or detonation of microexplosive charges in a series of closely-spaced bore-holes to form a vertically extending fractured plane. The fractured plane is sealed with a sealing medium to form a fluid-impervious screen.

Hydrocarbons trapped in the enclosed deposit zone are flushed from the formation by recirculating a fluid medium such as superheated brine and/or hot gases through the enclosed deposit zone under sufficient pressure to cause turbulent flow through the pore formations and to relieve the overburden pressure. The flushing medium may be injected in a series of pressure pulses to force the fluid through the pores by hydraulic ramming.

In situ gassification is also performed in subterranean deposits isolated by the barrier screens to form gas products for exploiting liquid reserves and to remove immobile reserves as a gas product.

Title
Oil recovery method and apparatus
Application Number
6/89871
Publication Number
4305463
Application Date
October 31, 1970
Publication Date
December 15, 1981
Inventor
Bohdan Zakiewicz
Houston
TX, US
Agent
Kanz & Timmons
Assignee
Oil Trieval Corporation
TX, US
IPC
E21B 33/138
E21B 43/263
E21B 43/30
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