Method of consolidating unconsolidated or insufficiently consolidated formations
AssigneeDeutsche Texaco Aktiengesellschaft
InventorGunter Pusch
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Abstract
A method for consolidating an oil-bearing formation by the use of a consolidating material together with a combustion promoter whereby oxidation occurs upon the injection of an oxygen-containing gas, thereby affecting consolidation of the formation.
Claims25
A method for consolidating an unconsolidated oil-bearing formation containing residual oil and penetrated by a wellbore comprising the steps of:
- a. injecting via said wellbore into said formation a combustion promoter comprising a mixture of a combustion initiator and an activator, wherein at least one activator is selected from the group consisting of vanadium oxychloride, iron sulfate and nickel chloride,
- b. injecting via said wellbore an after-wash fluid to insure the permeability of said formation,
- c. injecting via said wellbore an oxidizing material to effect oxidation of said mixture and residual oil and thereby consolidating said formation adjacent said wellbore.
The method of claim wherein a secondary consolidating material is injected with said combustion promoter.
A method for consolidating an unconsolidated oil-bearing formation containing residual oil and penetrated by a wellbore comprising the steps of:
- a. injecting via said wellbore into said formation a combustion promoter comprising at least one autooxidizing material selected from the group consisting of indene, fluorene, 1,2-dihydronaphthalene, 9,10-dihydroanthracene and mixtures thereof,
- b. injecting via said wellbore an after-wash fluid to insure the permeability of said formation,
- c. injecting via said wellbore an oxidizing material to effect oxidation of said mixture and said residual oil and thereby consolidating said formation adjacent said wellbore.
Dependencies are inferred from the claim text.