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. Petroleum recovery can be further enhanced through the use of techniques to reduce petroleum viscosity including sonication.
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1. A method to recover oil from an abandoned oil well drilled into a petroleum reservoir having an oil layer and a water layer, comprising: delivering an explosive composition capable of generating CO2 gas and heat into the oil layer through at least one selected from the one or more injection wells
1. A method to recover oil from an abandoned oil well drilled into a petroleum reservoir having an oil layer and a water layer, comprising: delivering an explosive composition capable of generating CO2 gas and heat into the oil layer through at least one selected from the one or more injection wells and the one or more production wells drilled into the petroleum reservoir, the explosive composition comprises a fuel component and an oxidizer component, wherein the fuel component is one or more of a carbon powder and a hydrocarbon-based compound;delivering an acid through one or more injection wells drilled into the petroleum reservoir 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; anddelivering acoustic energy into the petroleum reservoir to lower the viscosity of the oil, andrecovering oil from the petroleum reservoir. 2. The method of claim 1, wherein the petroleum reservoir is less than about 10 km3. 3. The method of claim 1, wherein the acid comprises hydrochloric acid. 4. The method of claim 1, wherein delivering the acid into the petroleum reservoir is performed before the one or more alkali metal carbonate or alkaline earth metal carbonate into the petroleum reservoir. 5. A method to recover oil from an abandoned oil well drilled into a petroleum reservoir having an oil layer and a water layer, comprising: delivering an explosive composition capable of generating CO2 gas and heat into the oil layer through at least one selected from the one or more injection wells and the one or more production wells drilled into the petroleum reservoir, the explosive composition comprising an emulsifying agent and one or more alkali metal carbonate or alkaline earth metal carbonate;delivering an acid through one or more injection wells drilled into the petroleum reservoir 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; anddelivering acoustic energy into the petroleum reservoir to lower the viscosity of the oil, andrecovering oil from the petroleum reservoir. 6. The method of claim 5, wherein a mole amount of the one or more alkali metal carbonate and alkaline earth metal carbonate is less than half the mole amount of acid equivalents delivered to the petroleum reservoir. 7. The method of claim 5, wherein the one or more of alkali metal carbonate or alkaline earth metal carbonate comprises particles having an average diameter of about 100 μm or less. 8. The method of claim 5, wherein the alkali metal or alkaline earth metal carbonate is one or more of sodium carbonate, calcium carbonate, potassium carbonate and magnesium carbonate. 9. The method of claim 5, 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. 10. The method of claim 5, wherein the one or more of alkali metal carbonate or alkaline earth metal 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. 11. The method of claim 5, wherein the explosive composition comprises a fuel component and an oxidizer component, wherein the fuel component is one or more of a carbon powder and a hydrocarbon-based compound. 12. The method of claim 11, 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 metal or alkaline earth metal carbonate to other components is from about 1:10 to about 1:2 by weight. 13. The method of claim 5, wherein the petroleum reservoir is less than about 10 km3. 14. The method of claim 5, wherein the acid comprises hydrochloric acid. 15. A method to recover oil from an abandoned oil well drilled into a petroleum reservoir having an oil layer and a water layer, comprising: delivering an explosive composition capable of generating CO2 gas and heat into the oil layer through at least one selected from the one or more injection wells and the one or more production wells drilled into the petroleum reservoir, the explosive composition comprising an emulsifying agent and sodium carbonate;delivering an acid through one or more injection wells drilled into the petroleum reservoir 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; anddelivering acoustic energy into the petroleum reservoir to lower the viscosity of the oil, andrecovering oil from the petroleum reservoir. 16. The method of claim 15, wherein the explosive composition comprises a fuel component and an oxidizer component, wherein the fuel component is one or more of a carbon powder and a hydrocarbon-based compound. 17. The method of claim 16, 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 sodium carbonate to other components is from about 1:10 to about 1:2 by weight. 18. The method of claim 15, wherein the petroleum reservoir is less than about 10 km3. 19. The method of claim 15, wherein the acid comprises hydrochloric acid. 20. The method of claim 15, wherein the sodium 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.
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