초록 ▼

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

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.

대표청구항 ▼

A method of treating a previously fractured bacteria contaminated subterranean formation penetrated by a well bore whereby said bacteria contamination is substantially reduced or eliminated comprising the steps of: mixing a bactericide with a carrier fluid in an amount effective to contact and kill

A method of treating a previously fractured bacteria contaminated subterranean formation penetrated by a well bore whereby said bacteria contamination is substantially reduced or eliminated comprising the steps of: mixing a bactericide with a carrier fluid in an amount effective to contact and kill bacteria contained in said formation when the resultant mixture is pumped thereinto, said carrier fluid having high fluid loss characteristics; pumping said mixture into said formation through said well bore so that bacteria contained in near-well bore portions of said formation are contacted with bactericide mixing a bactericide with a fracturing fluid in an amount effective to contact and kill bacteria contained in said formation when the resulting mixture is pumped thereinto; and pumping said mixture into said formation through said well bore at a rate and pressure sufficient to refracture said formation and thereby cause said bactericide to be distributed throughout said formation and to contact and kill at least a portion of any bacteria contained therein.