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Phenolic oligomer, preparation method thereof and asphaltene deposition inhibitor composition

An oligomer and composition technology, which is applied in the field of phenolic oligomer and its preparation, can solve the problems of less research on inhibitors, lack of inhibition methods, etc., and achieves significant economic benefits, good asphaltene deposition inhibition effect, and low dosage. Effect

Pending Publication Date: 2022-06-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, for the problem of asphaltene deposition in heavy oil reservoirs and near wells, there are few researches on inhibitors, and there is a lack of economical and effective inhibition methods, and it is impossible to prevent them in advance, which has become a technical problem restricting the development of heavy oil reservoirs

Method used

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  • Phenolic oligomer, preparation method thereof and asphaltene deposition inhibitor composition
  • Phenolic oligomer, preparation method thereof and asphaltene deposition inhibitor composition
  • Phenolic oligomer, preparation method thereof and asphaltene deposition inhibitor composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]23.24g (0.1mol / L) of 4-(trans-4-butylcyclohexyl)phenol, 0.7g of p-toluenesulfonic acid and 14g of xylene were added to the reaction kettle, heated to 70°C with stirring, and the stirring speed was 300rpm. 4.6g of 37% formaldehyde solution, heated to 90°C with stirring, reacted for 2h, continued to stir and heated to 110°C, and then gradually added dropwise 2.3g of 37% formaldehyde solution, 4-(trans-4-butylcyclohexyl)phenol and The molar ratio of formaldehyde was 1:0.85, and the reaction was carried out for 10 hours. After the reaction, the reaction product was adjusted to pH=7.5 with a 6% aqueous sodium hydroxide solution, poured into a separatory funnel, and the lower aqueous phase was removed to obtain 4 containing solvent. -(trans-4-butylcyclohexyl)phenol formaldehyde oligomer, pale yellow liquid, stored at 5°C.

[0048] In the reactor, add 20 parts of xylene, then add 50 parts of 4-(trans-4-butylcyclohexyl) phenol formaldehyde oligomer, 10 parts of 4,4'-butylene bis...

Embodiment 2

[0050] 23.24g (0.1mol / L) of 4-(trans-4-butylcyclohexyl)phenol, 0.7g of p-toluenesulfonic acid and 14g of xylene were added to the reaction kettle, heated to 70°C with stirring, and the stirring speed was 300rpm. 4.6g of 37% formaldehyde solution, heated to 90°C with stirring, reacted for 2h, continued to stir and heated to 110°C, and then gradually added dropwise 2.3g of 37% formaldehyde solution, 4-(trans-4-butylcyclohexyl)phenol and The molar ratio of formaldehyde was 1:0.85, and the reaction was carried out for 10 hours. After the reaction, the reaction product was adjusted to pH=7.5 with a 6% aqueous sodium hydroxide solution, poured into a separatory funnel, and the lower aqueous phase was removed to obtain 4 containing solvent. -(trans-4-butylcyclohexyl)phenol formaldehyde oligomer, pale yellow liquid, stored at 5°C.

[0051] In the reactor, add 25 parts of xylene, then add 43 parts of 4-(trans-4-butylcyclohexyl) phenol formaldehyde oligomer, 7 parts of 4,4'-butylene bis...

Embodiment 3

[0053] 20.43g (0.1mol / L) of 4-(trans-4-ethylcyclohexyl)phenol, 0.5g of p-toluenesulfonic acid and 12g of xylene were added to the reaction kettle, and heated to 60°C with stirring, and the stirring rate was 300rpm. 4g of 37% formaldehyde solution was added dropwise, heated to 80°C with stirring, reacted for 2h, continued to stir and heated to 95°C, and then gradually added dropwise 2.4g of 37% formaldehyde solution, 4-(trans-4-ethylcyclohexyl ) The molar ratio of phenol and formaldehyde was 1:0.8, and the reaction was carried out for 10 hours. After the reaction, the reaction product was adjusted to pH=6.5 with a 6% aqueous sodium hydroxide solution, poured into a separatory funnel, and the lower water phase was removed to obtain a solution containing The 4-(trans-4-ethylcyclohexyl) phenol formaldehyde oligomer of the solvent is a pale yellow liquid, which is stored at 5°C.

[0054] In the reactor, add 21 parts of xylene, then add 50 parts of 4-(trans-4-ethylcyclohexyl) phenol...

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Abstract

The invention relates to a phenolic oligomer, a preparation method thereof and an asphaltene deposition inhibitor composition. The phenolic aldehyde oligomer has a structure as shown in a formula 1. The preparation method of the phenolic oligomer as shown in the formula 1 comprises the following steps: dissolving 4-(trans-4-alkylcyclohexyl) phenol in a solvent, and reacting with formaldehyde or paraformaldehyde under the action of a catalyst to obtain the phenolic oligomer. The heavy oil reservoir asphaltene deposition inhibitor comprises: (1) a phenolic oligomer represented by formula 1; (2) 4, 4 '-butylidene bis (6-tert-butyl-3-methylphenol); and (3) a solvent. The inhibitor composition has a good asphaltene deposition inhibition effect at a relatively low use concentration, can obviously inhibit asphaltene deposition of a heavy oil reservoir oil well and a near wellbore area, and ensures efficient development of a heavy oil reservoir. Formula 1:

Description

technical field [0001] The invention relates to a phenolic oligomer and a preparation method thereof, as well as a high-efficiency inhibitor composition for preventing asphaltene deposition in heavy oil reservoirs. Background technique [0002] Heavy oil is a dynamic and stable colloidal system with continuous distribution. When the environment in which the system is located, such as temperature, pressure, and heavy oil components, changes, it directly affects the stability of the colloidal system. Once the colloidal system is out of balance, the asphaltene molecules will continue to Aggregation, precipitation and deposition occur, and deposition generally occurs in wellbore and near-wellbore formations. If deposition occurs in the reservoir, it can change the wettability of the rock, block the throat, reduce the formation permeability and porosity, and seriously damage the reservoir properties. If the deposition occurs in the wellbore, it will make the production operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C37/20C07C39/17C09K8/524
CPCC07C37/20C07C39/17C09K8/524C07C2601/14
Inventor 赵琳秦冰江建林高敏乔富林
Owner CHINA PETROLEUM & CHEM CORP
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