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Method for producing oil by injecting air buffering catalytic oxidation of thick oil

A heavy oil air injection and catalytic oxidation technology, which is applied in the development of fluids, earthwork drilling, wellbore/well components, etc., can solve the problems of high production cost, low recovery rate, low cumulative oil-gas ratio, etc. The effect of interfacial tension and improving surface activity

Inactive Publication Date: 2007-06-27
SOUTHWEST PETROLEUM UNIV
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  • Summary
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AI Technical Summary

Problems solved by technology

At present, most of these various heavy oil recovery methods have problems such as low cumulative oil-gas ratio, low ultimate recovery rate and high production cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0013] According to the composite catalyst mass fraction consumption of 0.5%, 0.51g of composite catalyst is dissolved in a small amount of water and added to 101.37g of heavy oil with a degassed viscosity of 513.7Pa·S at 50°C, and then injected with 40g of steam (under laboratory conditions Water instead of steam) while pressurizing 0.5MPa air, catalytic oxidation reaction at 180°C for 6 hours, to obtain viscous oil with a viscosity of 387.5Pa·S and a viscosity reduction rate of 24.57%.

example 2

[0015] According to the composite catalyst mass fraction consumption of 0.8%, 0.79g of composite catalyst is dissolved in a small amount of water and added to 98.25g of heavy oil with a degassed viscosity of 513.7Pa·S at 50°C, and then injected with 40g of steam (under laboratory conditions (water instead of steam) while pressurizing 0.5MPa of air, catalytic oxidation reaction at 180°C for 6 hours, to obtain viscous oil with a viscosity of 253.7Pa·S and a viscosity reduction rate of 50.61%.

example 3

[0017] According to the composite catalyst mass fraction consumption of 1.2%, 1.21g composite catalyst is dissolved in a small amount of water and added to the 100.93g thick oil with a degassed viscosity of 513.7Pa S at 50°C, and then injects 40g of steam (under laboratory conditions Water instead of steam) while pressurizing 0.5MPa air, catalytic oxidation reaction at 180°C for 6 hours, to obtain viscous oil with a viscosity of 106.2Pa·S and a viscosity reduction rate of 79.33%.

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Abstract

A catalytic oxidizing method for extracting high-viscosity crude oil features that the aqueous solution of the water-soluble or lipo-soluble refrectory catalyst with both catalytic oxidizing and cracking functions is proportionally filled in oil stratum, the steam used as heating medium and diluent is then filled, the air used as oxidant is finally filled, and the viscosity of crude oil is decreased by 20-100% after catalytic oxidizing and cracking reactions.

Description

technical field [0001] The invention relates to an oil recovery method for air injection to moderate catalytic oxidation in the exploitation of heavy oil reservoirs, which belongs to the new technology of heavy oil exploitation. Background technique [0002] Worldwide, recoverable oil is developing in the direction of heavy quality and low quality. The recoverable reserves of conventional oil have been greatly reduced, while the recoverable reserves of heavy oil and oil sand bitumen are considerable. According to the data of the 2002 World Petroleum Congress, the recoverable reserves of conventional crude oil in the world are only about 150 billion tons, while the recoverable reserves of heavy oil are as high as 1.550 billion tons. [0003] China is relatively rich in heavy oil resources. The latest research shows that the predicted resources are 19.8 billion tons, the proven heavy oil geological reserves are 1.81 billion tons, the produced geological reserves are 1.195 bill...

Claims

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Application Information

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IPC IPC(8): E21B43/16E21B43/24E21B43/22
Inventor 唐晓东何柏黄志宇李林崔盈贤
Owner SOUTHWEST PETROLEUM UNIV
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