Wells – Processes – Placing fluid into the formation
Patent
1990-05-09
1991-05-21
Suchfield, George A.
Wells
Processes
Placing fluid into the formation
166280, 166312, 252 8551, E21B 43267, E21B 3700
Patent
active
050167146
ABSTRACT:
Methods of treating a previously fractured bacteria contaminated subterranean formation penetrated by a well bore whereby the bacteria contamination is substantially reduced or eliminated are provided. The methods basically comprise mixing a bactericide with a fracturing fluid in an amount effective to contact and kill bacteria contained in the formation and pumping the mixture into the formation at a rate and pressure sufficient to re-fracture the formation. The re-fracturing of the formation causes the bactericide to be distributed throughout the formation and to contact and kill bacteria contained therein without adversely effecting the productivity of the formation.
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Hawser, J. D. et al., "Eliminating Bacterial Contamination in Producing Oil and Gas Wells", Producers Monthly, vol. 28, No. 11, Nov. 1964, pp. 8-11.
Society of Petroleum Engineers Paper 16218, Chemical Control of Biogenic H.sub.2 S in Producing Formations, by E. S. Littmann and T. L. McLean, Nalco Chemical Company, (1987).
McCabe Michael A.
Venditto James J.
Weaver Jimmie D.
Wilson J. Michael
Halliburton Company
Kent Robert A.
Suchfield George A.
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