Technique for treating hydrocarbon wells

Details Technique for treating hydrocarbon wells Technique for treating hydrocarbon wells

E - Fixed Constructions

21

B

E21B 43/248 (2006.01) E21B 37/08 (2006.01) E21B 43/11 (2006.01) E21B 43/25 (2006.01)

Patent

CA 2321316

A hydrocarbon producing well is treated by first igniting a gas generating charge in the well to clean out perforations communicating between the casing and the formation without creating high permeability channels adjacent the perforations or fracturing the formation in a macroscopic sense. Then, a treatment liquid is injected into the wells by a gas generating propellant charge placed in the production string and then ignited. The propellant charge is designed to produce a minimum horsepower sufficient to push the liquid more-or-less equally through all of the open perforations. The propellant charge is designed to produce a maximum horsepower which is less than what is necessary to fracture the formation. Basically, the combustion rate of the propellant charge is reduced by one of a multiplicity of techniques to produce a long, relatively slow combustion rate.

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