Solvent for removing underground heavy hydrocarbon deposition and preparation method thereof

A solvent and heavy hydrocarbon technology, applied in chemical instruments and methods, drilling compositions, ferrous oxides, etc., can solve the problems affecting the extraction and utilization of heavy hydrocarbon components, difficult to recycle, etc. Improve dissolving ability and viscosity reducing effect, promote dissolving and reduce viscosity, relieve the effect of heavy hydrocarbon deposition

Active Publication Date: 2021-04-23
河北峻极化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the solvent prepared by this method is difficult to recycle after removing heavy hydrocarbon deposits downhole, and it is also difficult to eff...

Method used

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  • Solvent for removing underground heavy hydrocarbon deposition and preparation method thereof
  • Solvent for removing underground heavy hydrocarbon deposition and preparation method thereof
  • Solvent for removing underground heavy hydrocarbon deposition and preparation method thereof

Examples

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preparation example Construction

[0030] The invention provides a method for preparing a solvent for removing downhole heavy hydrocarbon deposition, comprising the steps of:

[0031] S1. Preparation of Fe by co-precipitation method 3 o 4 nanoparticles;

[0032] S2, the Fe obtained in step S1 3 o 4 Nanoparticles dispersed in acetonitrile to obtain Fe 3 o 4 Nanoparticle suspension; Add thiophene monomer to the Fe3 o 4 Nanoparticle suspension, and add the acetonitrile solution of potassium permanganate, get polythiophene-coated Fe after full reaction 3 o 4 nanoparticles;

[0033] S3, mixing 1,3-dibromopropane and diethylamine according to a preset molar ratio and then dissolving in water, recovering the oil phase after sufficient alkylation reaction, and obtaining a first solvent with a diamine structure after heating to remove impurities;

[0034] S4, the Fe coated with polythiophene obtained in step S2 3 o 4 The nanoparticles are dispersed in ethanol, and then the first solvent, octylamine and ethoxy...

Embodiment 1

[0045] This embodiment provides a method for preparing a solvent for removing downhole heavy hydrocarbon deposition, comprising the following steps:

[0046] S1. Under a nitrogen atmosphere, mix ferrous chloride and ferric chloride according to a molar ratio of 1:2.5 and dissolve them in deionized water, then add ammonia water with a mass fraction of 25wt%, collect the precipitate after the reaction is complete, wash, After drying, Fe 3 o 4 nanoparticles.

[0047] S2, 1g of the Fe obtained in step S1 3 o 4 Nanoparticles were added into 10mL acetonitrile and ultrasonically dispersed for 10min to obtain Fe 3 o 4 nanoparticle suspension; then 2 mL of thiophene monomer was added to the Fe 3 o 4 During the stirring process, add 50mL of potassium permanganate solution in acetonitrile with a concentration of 5mmol / L drop by drop, after fully reacting for 3 hours, collect the precipitate, wash and dry it to obtain the poly Thiophene-coated Fe 3 o 4 nanoparticles.

[0048]...

Embodiment 2～7 and comparative example 1～4

[0052] Embodiments 2 to 7 and comparative examples 1 to 4 respectively provide a method for preparing a solvent for removing downhole heavy hydrocarbon deposition. Compared with Example 1, the difference is that the thiophene monomer and Fe in step S2 are changed. 3 o 4 The volume ratio of the nanoparticle suspension, the Fe coated with polythiophene in step S4 3 o 4 The mass ratio of nanoparticles and the first solvent and the second solvent and oleic acid, 150 in step S5 # The volume ratio of mineral spirits, water, all the other steps are consistent with embodiment 1, do not repeat them here. The preparation parameters corresponding to Examples 2-7 and Comparative Examples 1-4 are shown in Table 1.

[0053] The preparation parameter of table 1 embodiment 2~7 and comparative example 1~4

[0054]

[0055] According to the methods provided in Examples 1 to 7 and Comparative Examples 1 to 4, prepare corresponding solvents for removing downhole heavy hydrocarbon depositio...

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Abstract

The invention provides a solvent for removing underground heavy hydrocarbon deposition and a preparation method thereof. The preparation method comprises the following steps of coating the surfaces of Fe3O4 nanoparticles with polythiophene to obtain Fe3O4 nanoparticles coated with polythiophene, preparing a first solvent with a diamine structure by utilizing alkylation reaction between 1, 3-dibromopropane and diethylamine, reacting the first solvent with the Fe3O4 nanoparticles coated with polythiophene to obtain a second solvent, and finally, mixing the second solvent with oleic acid, 150# solvent oil and water according to a preset volume ratio to obtain the solvent for removing underground heavy hydrocarbon deposition. By means of the mode, the first solvent can be used for conducting amination modification on the nanoparticles, and the dissolving effect and viscosity reduction capacity of the solvent are effectively improved; and the second solvent is mixed with oleic acid, 150# solvent oil and water, so that the dissolving capacity and viscosity reduction effect of the solvent are further improved, the effect of removing underground heavy hydrocarbon deposition is achieved, and the requirements of practical application are met.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a solvent for removing downhole heavy hydrocarbon deposition and a preparation method thereof. Background technique [0002] Heavy oil occupies a very large proportion of the world's oil reserves and is one of the important unconventional resources. During the production of heavy oil, due to changes in temperature, pressure, pH and other factors, the thermodynamic equilibrium state of heavy hydrocarbon components in crude oil is broken, resulting in deposition, which greatly increases the difficulty of heavy oil production. This kind of heavy hydrocarbon components are mainly asphaltenes, which can absorb particles such as silt and clay during the production process to form heavy hydrocarbon deposits, which not only change the wettability of reservoir rocks, reduce reservoir permeability, but also Blockage of wellbore and oil production equipment will have a serio...

Claims

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Application Information

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IPC IPC(8): C09K8/524C01G49/08
CPCC09K8/524C01G49/08C09K2208/10
Inventor 张红娟周圣杨欢
Owner 河北峻极化工科技有限公司
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