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Betaine surfactant combination flooding composition and application thereof

A technique of surfactant and compound flooding, which is applied in the direction of drilling composition, production fluid, wellbore/well components, etc., and can solve the problems of small charge repulsion and poor stability of emulsification

Inactive Publication Date: 2015-01-07
大连东方创新科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The charge repulsion of the hydrophilic group head of the betaine active agent is very small, and the emulsification stability is also poor

Method used

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  • Betaine surfactant combination flooding composition and application thereof
  • Betaine surfactant combination flooding composition and application thereof
  • Betaine surfactant combination flooding composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Application of Betaine Surfactant Compound Flooding Composition in Enhanced Recovery of Low Permeability Reservoir:

[0070] (1) Betaine surfactant: a mixture of octadecyl hydroxypropyl sultaine: didodecyl hydroxypropyl sultaine = 70:30 (w / w).

[0071] Octadecyl hydroxypropyl sultaine and didodecyl hydroxypropyl sultaine: Octadecyl tertiary amine or didodecyl tertiary amine in combination with sodium 3-chloro-2-hydroxypropane sulfonate The ratio is 1:1.1 (molar ratio), methanol is used as solvent at 125°C, the quaternization reaction is carried out for 8 hours, and the product is obtained by demethanolization.

[0072] (2) Nonionic surfactant: m-xylyl octadecyl alcohol polyoxypropylene (5) polyoxyethylene (20) ether: Friedel-Crafts alkylation of m-xylene and methyl oleate under the action of an acidic catalyst Reaction to obtain methyl m-xylyl octadecane carboxylate, further hydrogen reduction to obtain m-xylyl octadecyl alcohol, and then carry out addition reaction wi...

Embodiment 2

[0088] Application of Betaine Surfactant Compound Flooding Composition in Enhanced Recovery of Medium and Low Permeability Reservoirs:

[0089] (1) Betaine surfactant: a mixture of octadecyl hydroxypropyl sultaine: didodecyl hydroxypropyl sultaine = 70:30 (w / w).

[0090] Octadecyl hydroxypropyl sultaine and didodecyl hydroxypropyl sultaine are the same as in Example 1.

[0091] (2) Nonionic surfactant: m-xylyl octadecyl alcohol polyoxypropylene (5) polyoxyethylene (20) ether, with embodiment 1.

[0092] (3) functional polymer surfactant: with embodiment 1.

[0093] (4) Polymer: The water-soluble polymer is partially hydrolyzed polyacrylamide HPAM, with a molecular weight of 17-19 million, produced by Daqing Refining and Chemical Company.

[0094] The composition of composite flooding composition of the present invention:

[0095] Betaine surfactant (self-synthetic) 0.2%

[0096] Nonionic surfactant (self-synthesized) 0.08%

[0097] Functional polymer surfactant (self-synt...

Embodiment 3

[0109] Application of Betaine Surfactant Compound Flooding Composition in Enhanced Recovery of Medium and Low Permeability Reservoirs:

[0110] (1) Betaine surfactant: a mixture of octadecyl hydroxypropyl sultaine: didodecyl hydroxypropyl sultaine = 80:20 (w / w).

[0111] Octadecyl hydroxypropyl sultaine and didodecyl hydroxypropyl sultaine are the same as in Example 1.

[0112] (2) Nonionic surfactant: stearyl alcohol polyoxypropylene (5) polyoxyethylene (20) ether, provided by Tianjin University of Technology.

[0113] (3) functional polymer surfactant: with embodiment 1.

[0114] (4) Polymer: The water-soluble polymer is partially hydrolyzed polyacrylamide HPAM, with a molecular weight of 25 million, produced by Daqing Refining and Chemical Company.

[0115] The composition of composite flooding composition of the present invention:

[0116]

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Abstract

The invention relates to a betaine surfactant combination flooding composition and application thereof. The combination flooding composition comprises the following components in percentage by weight: 0.03-0.5% of betaine surfactant, 0.01-0.3% of nonionic surfactant, 0.0-0.3% of functional polymer surfactant, 0.0-0.5% of polymer, 0.0-1.5% of alkali and the balance of water. The functional polymer surfactant, polymer and alkali are not 0 at the same time. By using the cheaper betaine surfactant and integrating multiple mechanisms for enhancing the recovery rate, the surfactant combination flooding composition achieves good coordination between recovery rate enhancement effect and cost, can greatly enhance the oil recovery rate, and has economic effect of forced production in low-permeability reservoirs and reservoirs after polymer flooding.

Description

technical field [0001] The invention relates to a betaine surfactant composite flooding composition and an application thereof, belonging to the technical field of petroleum exploitation. Background technique [0002] U.S. Patent No. 4,008,165 reports the application of sulfobetaine amphoteric surfactants in tertiary oil recovery. The surfactants disclosed in this U.S. patent are very effective in reducing oil-water interfacial tension in high-salt water-based media with a large content of divalent metal cations. Patent 200410070467.X reported a betaine surfactant with an arylalkylhydrophobic structure synthesized from alkylphenols, which has excellent performance in reducing interfacial tension, but the synthesis process is very complicated. Patent 201210056931.4 reports another betaine surfactant with arylalkyl hydrophobic structure synthesized from oleic acid, which also has a good performance of reducing interfacial tension, but the synthesis route is too long. [0003]...

Claims

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Application Information

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IPC IPC(8): C09K8/584E21B43/22
CPCC09K8/584C09K8/588
Inventor 刘春德
Owner 大连东方创新科技有限公司
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