Temperature-resistant salt-resistant low-tension foaming agent composition as well as preparation method and application thereof

A temperature-resistant, salt-resistant, low-tension technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of poor foam performance of low-tension surfactants, difficulty in forming stable plugs, and inability to clean up, etc. Achieve the effect of good foam stability, increased salt resistance, and strong salt resistance

Inactive Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is that the existing foaming agents are limited in reducing the oil / water interfacial tension in high-temperature and high-salt formations, and cannot clean the residual oil in the reservoir, and the foaming performance of low-tension surfactants is relatively poor , it is difficult to form a stable plugging problem

Method used

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  • Temperature-resistant salt-resistant low-tension foaming agent composition as well as preparation method and application thereof
  • Temperature-resistant salt-resistant low-tension foaming agent composition as well as preparation method and application thereof
  • Temperature-resistant salt-resistant low-tension foaming agent composition as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Dissolve the alkyl glucoside and polyether anionic surfactant in the water whose salinity is 50000mg / L and wherein the content of calcium and magnesium ions is 2000mg / L according to the molar ratio of 2:1, and the alkyl glycoside and polyether anionic surfactant Based on the total mass, the mass fraction is 0.5%, and mixed uniformly to form an aqueous foam agent solution, that is, to obtain the temperature-resistant, salt-resistant, low-tension foam agent composition.

[0032] The obtained temperature-resistant, salt-resistant, low-tension foam composition is mixed with nitrogen in a volume ratio of 3:1 to obtain a temperature-resistant, salt-resistant, low-tension foam flooding composition.

[0033] The above composition was taken under the condition of 100°C, and the test of foam plugging capacity was carried out in a sand-filled pipe with a length of 30 cm, a diameter of 3.8 cm, and a permeability of 300 mD. First inject water at a rate of 1mL / min, and record the pre...

Embodiment 2

[0035] Dissolve the alkyl glucoside and polyether anionic surfactant in the water whose salinity is 50000mg / L and wherein the calcium and magnesium ion content is 3000mg / L according to the molar ratio of 0.5:1, and the alkyl glycoside and polyether anionic surfactant Based on the total mass, the mass fraction is 0.3%, and mixed uniformly to form an aqueous foam agent solution, that is, to obtain the temperature-resistant, salt-resistant, low-tension foam agent composition.

[0036] The obtained temperature-resistant, salt-resistant, low-tension foam composition is mixed with nitrogen gas at a volume ratio of 5:1 to obtain a temperature-resistant, salt-resistant, low-tension foam flooding composition.

[0037]The above composition was taken under the condition of 120°C, and the test of foam plugging capacity was carried out in a sand-filled pipe with a length of 30 cm, a diameter of 3.8 cm, and a permeability of 300 mD. First inject water at a rate of 1mL / min, and record the pr...

Embodiment 3

[0039] Dissolve the alkyl glucoside and polyether anionic surfactant in the water with a salinity of 100000mg / L and a calcium and magnesium ion content of 4000mg / L according to the molar ratio of 1:1, and use the alkyl glycoside and polyether anionic surfactant Based on the total mass, the mass fraction is 0.2%, and they are uniformly mixed to form an aqueous solution of the foaming agent, that is, the temperature-resistant, salt-resistant, low-tension foaming agent composition is obtained.

[0040] The obtained temperature-resistant, salt-resistant, low-tension foam composition is mixed with nitrogen gas at a volume ratio of 7:1 to obtain a temperature-resistant, salt-resistant, low-tension foam flooding composition.

[0041] The above composition was taken under the condition of 60°C, and the test of foam plugging ability was carried out in a sand-filled pipe with a length of 30 cm, a diameter of 3.8 cm, and a permeability of 300 mD. First inject water at a rate of 1mL / min, ...

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Abstract

The invention relates to a temperature-resistant salt-resistant low-tension foaming agent composition as well as a preparation method and an application thereof to mainly solve the problems that an existing foaming agent can only reduce limited oil / water interfacial tension and cannot clean residual oil of an oil reservoir under a high-temperature high-salt stratum, and a low-tension surfactant is relatively poor in foam property and cannot form stable blockage easily. By adopting the technical scheme that the temperature-resistant salt-resistant low-tension foaming agent composition comprises alkyl glycoside and a polyether anionic surfactant, and the mole ratio of the alkyl glycoside to the polyether anionic surfactant is (0.1-50):1, the problems are well solved, and the temperature-resistant salt-resistant low-tension foaming agent composition can be applied to enhanced oil recovery. The formula I is shown in the description, and a formula II is [R1-O-(C2H4O)a-(C3H6O)b-(C2H4O)c-R2Y].jM.

Description

technical field [0001] The invention relates to a temperature-resistant, salt-resistant, low-tension foam composition, a preparation method and application thereof. Background technique [0002] At present, my country's major oil fields have entered a period of high water cut. How to improve oil recovery and maximize the development of remaining reserves, tertiary oil recovery technology has played a very important role in ensuring stable and high production of oil fields. Among new technologies for tertiary oil recovery, chemical composite flooding is still one of the most promising methods. The oil displacement mechanism is mainly that the polymer or glue increases the viscosity of the displacement water, reduces the oil-water mobility ratio, alleviates the channeling phenomenon, and improves the sweep efficiency; surfactants and alkalis reduce the oil / water interfacial tension, increase the capillary number, and promote Crude oil is desorbed and effectively dispersed fro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/584
CPCC09K8/584
Inventor 裘鋆何秀娟何良好沙鸥
Owner CHINA PETROLEUM & CHEM CORP
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