Efficient foaming agent for air foam displacement of reservoir oil and preparation method of efficient foaming agent

A technology of air foam flooding and foaming agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor water carrying capacity, strong corrosion of equipment and pipelines, etc., and achieve low cost and significant corrosion inhibition effect , Good effect of synergy

Active Publication Date: 2018-01-19
SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the conditions of high salinity and high condensate oil content, the traditional foaming agent has poor foaming performance, foam stability, poor water carrying capacity and strong corrosion to equipment pipelines

Method used

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  • Efficient foaming agent for air foam displacement of reservoir oil and preparation method of efficient foaming agent
  • Efficient foaming agent for air foam displacement of reservoir oil and preparation method of efficient foaming agent
  • Efficient foaming agent for air foam displacement of reservoir oil and preparation method of efficient foaming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Taking the preparation of 1 kg of foaming agent for air foam displacement of the present invention as an example, it is made from the raw materials of the following mass proportions:

[0028]

[0029]

[0030] The preparation method is as follows: first add 0.6% of the thickened foam stabilizer into water at about 25°C, stir while adding, completely disperse and dissolve, and put it into a plastic bucket for standby. Then 250g lauryl polyoxyethylene ether betaine, 50g lauryl amidopropyl dimethylamine oxide, 20g cationic dodecyl polyglucoside, 110g N-(2-pyridyl) alcohol ether methylene Base amide, 30g alkyl sodium sulfate, 90g sodium chloride, 440g water, 10g thickened foam stabilizer (0.6% aqueous solution) are added into the stirring tank according to the ratio in the formula in turn, and it can be stirred evenly.

Embodiment 2

[0032] Taking the preparation of 1 kg of foaming agent for air foam displacement of the present invention as an example, it is made from the raw materials of the following mass proportions:

[0033]

[0034] Its preparation method is identical with embodiment 1.

Embodiment 3

[0036] Taking the preparation of 1 kg of foaming agent for air foam displacement of the present invention as an example, it is made from the raw materials of the following mass proportions:

[0037]

[0038]

[0039] Its preparation method is identical with embodiment 1.

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Abstract

An efficient foaming agent for air foam displacement of reservoir oil is formed by mixing the following components by mass percent: 20 to 30 percent of polyether segment-containing betaine ampholyticsurfacant, 4 to 10 percent of alkylamide propyl dimethyl amine oxide, 1 to 3 percent of cationic alkyl polyglycoside, 0.005 to 0.01 percent of thickening foam stabilizer, 6 to 12 percent of sodium chloride, 2 to 5 percent of sodium alkyl sulfate, 10 to 15 percent of N-(2-pyridyl) alcohol ether methylene amide and the balance of water. The invention also discloses a preparation method of the efficient foaming agent for air foam displacement of the reservoir oil. The foaming agent has high comprehensive performance of foam, corrosion resistance, hypersalinity resistance and oil resistivity, andcan meet the performance requirement of low permeability oil reservoir foam displacement of the reservoir oil in the field of oilfield production.

Description

technical field [0001] The invention belongs to the technical field of foaming agents for oil fields, and in particular relates to a high-efficiency foaming agent for air foam flooding and a preparation method thereof. Background technique [0002] Air foam flooding is a new technology for enhanced oil recovery developed in my country in recent years. It has abundant gas sources and low cost. The main reason why foam has oil displacement effect is the seepage characteristic of foam in porous media. The foam formed in the pores of the formation, most of the gas is trapped in the pores, the high saturation of the trapped gas forms a lower water phase permeability, the foam improves the mobility ratio by reducing the permeability of displaced water and gas, and expands the water phase. At the same time, foam is a fluid with a high apparent viscosity, which can replace polymers to control the fluidity of the flooding system, and can be used as a plugging agent for water flow to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
Inventor 刘彦锋
Owner SHAANXI RES DESIGN INST OF PETROLEUM CHEM IND
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