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Composite oil displacement agent

A technology for compound oil displacement and glycerin, which is applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of temperature resistance, poor interfacial stability, and insignificant viscosity reduction effect of heavy oil, and achieves high self-strength. , the effect of improving microscopic oil displacement efficiency and good mechanical properties

Inactive Publication Date: 2020-04-17
常州五荣化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a composite oil-displacing agent in view of the shortcomings of commonly used oil-displacing agents such as poor temperature resistance and poor interface stability, and the problem that the viscosity-reducing effect on heavy oil is not obvious

Method used

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Examples

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preparation example Construction

[0029] The preparation method of compound oil flooding base material comprises the steps:

[0030](1) At 30~45°C, take 12~20 parts of diatomite, 4~8 parts of dimer fatty acid, 3~6 parts of hydroquinone, and 5~9 parts of phthalic anhydride in parts by mass. , 30~50 parts of 1,2-propanediol were sealed and mixed in the reaction kettle, protected by nitrogen, heated to 150~170°C, kept stirring for 25~45min, cooled to 110~130°C, added 4~8% diatomaceous earth Maleic anhydride heat preservation and mixing for 20~40min, heat up to 160~170℃, vacuum treatment for 2~4h, to obtain the reaction material, in parts by mass, take 25~45 parts of the reaction material, 2~5 parts of terephthalate Phenol, 5~8 parts of styrene, 3~7 parts of acrylic acid, 0.1~0.3 parts of catalyst, 18~37 parts of methyl ethyl ketone peroxide are mixed in a reactor, and stirred at 350~550r / min for 1~3h at 35~50℃ , heat up to 70~85°C and keep it for 2~4 hours to get the treated material;

[0031] (2) In parts by m...

Embodiment 1

[0035] Auxiliary materials: mix starch and silicon dioxide at a mass ratio of 2:1 to obtain auxiliary materials.

[0036] Additive: Mix ethyl acetate, glycerol triphosphate and magnesium stearate at a mass ratio of 1:3:0.1 to obtain the additive.

[0037] Catalyst: Mix naphthenic cobalt and ferrocene in a mass ratio of 3:1 to obtain a catalyst.

[0038] Modified fiber material: in parts by mass, take 10 parts of bamboo nanocellulose, 0.2 parts of silane coupling agent KH-550, 1 part of potassium bromide, and 35 parts of acetic acid solution with a mass fraction of 15%, mix and stir for 35 minutes, pump Filter, collect the filter residue and dry at 65°C to obtain the modified fiber material.

[0039] Emulsifier: Mix Tween-80 and Span-40 at a mass ratio of 4:3 to obtain an emulsifier.

[0040] Monomer liquid: in parts by mass, 7 parts of acrylic acid, 5 parts of methyl methacrylate, 10 parts of acryloyloxybutylsulfonic acid, and 30 parts of NaOH solution with a mass fraction o...

Embodiment 2

[0048] Auxiliary materials: Mix starch and silicon dioxide at a mass ratio of 5:1 to obtain auxiliary materials.

[0049] Additive: Mix ethyl acetate, glycerol triphosphate and magnesium stearate at a mass ratio of 1:7:0.1 to obtain the additive.

[0050] Catalyst: Mix naphthenic cobalt and ferrocene in a mass ratio of 7:1 to obtain a catalyst.

[0051] Modified fiber material: in parts by mass, take 15 parts of bamboo nanocellulose, 0.5 parts of silane coupling agent KH-550, 2 parts of potassium bromide, and 50 parts of acetic acid solution with a mass fraction of 15%, mix and stir for 60 minutes, pump Filter, collect the filter residue and dry at 80°C to obtain the modified fiber material.

[0052] Emulsifier: Mix Tween-80 and Span-40 at a mass ratio of 7:3 to obtain an emulsifier.

[0053] Monomer liquid: in parts by mass, 13 parts of acrylic acid, 9 parts of methyl methacrylate, 15 parts of acryloyloxybutyl sulfonic acid, and 50 parts of NaOH solution with a mass fractio...

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Abstract

The invention relates to a composite oil displacement agent, and belongs to the technical field of crude oil exploitation. Through in-situ polymerization and mechanical blending of diatomite and dimerfatty acid, an adsorption effect on oily components is provided, molecular chain movement is weakened, the stability in the oil displacement process is improved, the temperature resistance and interface stability of the oil displacement agent can be effectively improved, and the viscosity of thickened oil is reduced; lignite and metakaolin are treated, a mixed monomer is grafted, the interfacialtension between the oil displacement agent and crude oil is reduced through the synergistic effect of various raw materials, and the oil washing capacity of the oil displacement agent is improved. According to the invention, the defects of poor temperature resistance, poor interface stability and the like of a conventional common oil displacement agent are overcome, and the problem of unobvious viscosity reduction effect on thickened oil is solved.

Description

technical field [0001] The invention relates to a composite oil displacement agent, which belongs to the technical field of crude oil exploitation. Background technique [0002] In recent years, with the increasing demand for oil and the decreasing production of conventional crude oil, the development of heavy oil is deepening year by year. In order to improve heavy oil recovery, steam flooding has become a large-scale industrial application of heavy oil thermal recovery technology at home and abroad. The characteristics of heavy oil reservoirs such as deep burial, high steam injection pressure, low dryness, and wide hot water area have seriously affected the oil displacement effect of steam flooding. The application effect of steam flooding has achieved the goal of greatly increasing the recovery factor. The development of steam flooding requires high temperature resistance of the oil displacement agent. The temperature range of the steam sweep zone is 100°C-220°C, and th...

Claims

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Application Information

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IPC IPC(8): C09K8/588
CPCC09K8/588
Inventor 林正脉
Owner 常州五荣化工有限公司
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