Method of production stimulation and enhanced recovery of oil

Details Method of production stimulation and enhanced recovery of oil Method of production stimulation and enhanced recovery of oil

1975-10-16

1978-04-18

Novosad, Stephen J.

Wells

Processes

Electric current or electrical wave energy through earth for...

166249, 166271, 166302, E21B 4324

Patent

active

040846385

ABSTRACT:
The present invention relates to an improved method of recovery of petroleum from presently existing wells which are either non-producing or low production types. The method utilizes surges and oscillations of electrical energy in excess of 150 kilovolts involving the use of heavy current flow over a carbonaceous path in order to establish heat, electrical and physical shock, and steam fracturing (or shattering) within certain sedimentary rock formations, thereby giving rise to an increase in the effective well and reservoir radius both within an existing well and between wells. The method involves the use of a minimum of two existing wells, one being an injection well and the other being a production or recovery well. In each well, insulated high voltage cable is secured within the well casing in order to feed required electrical energy into a probe rod which, at the bottom of each well is driven into the oil stratum in a configuration in which each probe is directed toward the other. The distance of the respective probes from each other will, depending upon factors of voltage, current flow and geological conditions, be disposed as close as 25 feet apart or, in any given instance, as far as 3,000 feet apart.

REFERENCES:
patent: 2795279 (1957-06-01), Sarapuu
patent: 2799641 (1957-07-01), Bell
patent: 3169577 (1965-02-01), Sarapuu
patent: 3208674 (1964-09-01), Bailey
patent: 3620300 (1971-11-01), Crowson
patent: 3642066 (1972-02-01), Gill

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