A method of recovering petroleum from dormant oil wells or increasing the production of oil wells. An alkali or alkali earth carbonate is introduced into a water layer associated with a subterranean petroleum reservoir and/or an explosive composition is introduced into an oil layer associated with a
A method of recovering petroleum from dormant oil wells or increasing the production of oil wells. An alkali or alkali earth carbonate is introduced into a water layer associated with a subterranean petroleum reservoir and/or an explosive composition is introduced into an oil layer associated with a subterranean petroleum reservoir. CO2 gas is produced by reacting the alkali or alkali earth carbonate with an acid and/or by detonating the explosive composition. An explosive composition can be introduced and detonated to achieve sufficient CO2 gas production to increase pressure within the subterranean petroleum reservoir.
대표청구항▼
1. A method to increase petroleum production from an oil well drilled into a petroleum reservoir having an oil layer and an aqueous layer having one or more of Ca2+ and Mg2+ ions present, comprising: delivering an acid into the aqueous layer through one or more injection wells drilled into the aqueo
1. A method to increase petroleum production from an oil well drilled into a petroleum reservoir having an oil layer and an aqueous layer having one or more of Ca2+ and Mg2+ ions present, comprising: delivering an acid into the aqueous layer through one or more injection wells drilled into the aqueous layer;delivering one or more of an alkali carbonate or an alkali earth carbonate into the aqueous layer through one or more injection wells drilled into the aqueous layer; andsealing the oil well in a manner to substantially confine an increase in pressure within the petroleum reservoir,wherein delivering the acid into the aqueous later is performed before the one or more alkali carbonate or alkali earth carbonate into the aqueous layer, andthe amount of acid delivered is such that the molar concentration of H+ ions in the aqueous layer is about two times or more concentrated than the sum of the molar concentrations of Ca2+ and Mg2+ ions present in the aqueous layer. 2. The method of claim 1, wherein an alkali carbonate is delivered to the aqueous layer. 3. The method of claim 2, wherein the alkali carbonate is sodium carbonate. 4. The method of claim 1, wherein the mole amount of the one or more alkali carbonate and alkali earth carbonate is less than half the mole amount of acid equivalents introduced to the aqueous layer. 5. The method of claim 1, wherein delivering the one or more of an alkali carbonate or an alkali earth carbonate into the aqueous layer is done through a first injection well drilled into the aqueous layer and delivering the acid into the aqueous layer is done through a second injection well drilled into the aqueous layer; and wherein at least one delivery of the acid into the aqueous later is performed before the one or more alkali carbonate or alkali earth carbonate is delivered into the aqueous layer, and wherein at least one delivery of the acid into the aqueous later is performed simultaneous to the delivery of one or more alkali carbonate or alkali earth carbonate into the aqueous layer. 6. The method of claim 1, wherein the one or more of alkali carbonate or alkali earth carbonate is supplied as particles having an average diameter of about 100 μm or less. 7. The method of claim 1, wherein the alkali or alkali earth carbonate is delivered as one or more of an aqueous solution about 50% or more concentrated and a slurry having about 5 to about 35% by weight of alkali or alkali earth carbonate. 8. The method of claim 1, wherein the alkali or alkali earth carbonate is one or more of sodium carbonate, calcium carbonate, potassium carbonate and magnesium carbonate. 9. The method of claim 1, where the acid is a mineral acid and the mineral acid comprises a solution that is from about 10 to about 50% concentrated. 10. The method of claim 9, wherein the mineral acid is hydrochloric acid. 11. A method to increase petroleum production from an oil well drilled into a petroleum reservoir having an oil layer and a water layer, wherein at least one selected from one or more injection wells and one or more production wells are drilled into the oil layer and one or more injection wells are drilled into the water layer, comprising: delivering an explosive composition capable of generating CO2 gas and heat into at least one selected from the one or more injection wells and the one or more production wells drilled into the oil layer;delivering an acid through one or more injection wells drilled into the aqueous layer to acidify the aqueous layer;sealing the petroleum reservoir in a manner to confine pressure build-up within the petroleum reservoir;detonating the explosive composition; andone or more selected from:introducing a sonication probe into at least one of the one or more production well such that the sonication probe is capable of delivering acoustic energy to petroleum within the reservoir to lower the viscosity of the petroleum, andintroducing microwave radiation into at least one of the one or more production wells such that the microwave radiation is at least partially absorbed by petroleum with the reservoir to lower the viscosity of the petroleum,wherein the explosive composition comprises a fuel component and an oxidizer component, the fuel component is one or more of a carbon powder and a hydrocarbon-based compound. 12. The method of claim 11, wherein the hydrocarbon-based compound comprises unrefined crude oil. 13. The method of claim 12, wherein the explosive composition further comprises an emulsifying agent and one or more alkali carbonate or alkali earth carbonate. 14. The method of claim 13, wherein the explosive composition comprises from about 2% to about 10% by weight of the fuel component; from about 90% to about 98% by weight of the oxidizer component; and the emulsifying agent is from about 4% to about 50% of the total weight of the fuel component; and the ratio of alkali or alkali earth carbonate to other components is from about 1:10 to about 1:2 by weight. 15. The method of claim 13, wherein the alkali or alkali earth carbonate is one or more of sodium carbonate, calcium carbonate, potassium carbonate and magnesium carbonate. 16. The method of claim 13, wherein the emulsifying agent comprises one or more of: a) a salt of a compound having at least one hydrocarbyl group and at least one carboxylic acid functionality;b) an alkyl-saccharide emulsifier;c) sorbitol mono-oleate;d) sodium mono-oleate; ande) the product of an acylation reaction between a hydrocarbyl group-containing carboxylic acid or carboxylic anhydride and a primary or secondary amine, wherein the primary or secondary amine is one or more selected from Formulae I, II, III, IV, V, VI, and VII: H2N—R (I);R—NH—R (II);H2N—R—OH (III);R′—NH—R—OH (IV);H2N—(RO)x—H (V);R′—NH(RO)x—H (VI); andR″NH—((CH2)yN)—R2″ (VII); where R is a hydrocarbon group containing from about 1 to about 24 carbon atoms, R′ is independently either an R group or an R group substituted with one or more hydroxyl groups, R″ is independently either hydrogen, an R group, or an R group substituted by one or more hydroxyl or amino functionalities, x is from about 2 about 15, and y is from about 2 to about 10. 17. The method of claim 12, wherein the one or more of alkali carbonate or alkali earth carbonate is supplied as one or more of an aqueous solution about 50% or more concentrated and particles having an average diameter of about 100 μm or less. 18. A method to increase petroleum production from an oil well drilled into a petroleum reservoir having an oil layer and an aqueous layer having one or more of Ca2+ and Mg2+ ions present, comprising: delivering an acid into the aqueous layer through one or more injection wells drilled into the aqueous layer;delivering one or more of an alkali carbonate or an alkali earth carbonate into the aqueous layer through one or more injection wells drilled into the aqueous layer;sealing the oil well in a manner to substantially confine an increase in pressure within the petroleum reservoir,wherein delivering the acid into the aqueous later is performed before the one or more alkali carbonate or alkali earth carbonate into the aqueous layer, andthe amount of acid delivered is such that the molar concentration of H+ ions in the aqueous layer is about two times or more concentrated than the sum of the molar concentrations of Ca2+ and Mg2+ ions present in the aqueous layer; andone or more selected from:introducing a sonication probe into at least one of the one or more production well such that the sonication probe is capable of delivering acoustic energy to petroleum within the reservoir to lower the viscosity of the petroleum, andintroducing microwave radiation into at least one of the one or more production wells such that the microwave radiation is at least partially absorbed by petroleum with the reservoir to lower the viscosity of the petroleum. 19. The method of claim 18, wherein the one or more of alkali carbonate or alkali earth carbonate is supplied as one or more of an aqueous solution about 50% or more concentrated and particles having an average diameter of about 100 μm or less. 20. The method of claim 18, wherein the explosive energy created by detonation of the explosion composition is from about 0.05 to about 2 metric tons of trinitrotoluene. 21. The method of claim 18, wherein delivering the one or more of an alkali carbonate or an alkali earth carbonate into the aqueous layer is done through a first injection well drilled into the aqueous layer and delivering the acid into the aqueous layer is done through a second injection well drilled into the aqueous layer; and wherein at least one delivery of the acid into the aqueous later is performed before the one or more alkali carbonate or alkali earth carbonate is delivered into the aqueous layer, and wherein at least one delivery of the acid into the aqueous later is performed simultaneous to the delivery of one or more alkali carbonate or alkali earth carbonate into the aqueous layer.
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