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A kind of oil washing agent for carbon dioxide displacement and its preparation method and application

A technology of carbon dioxide and oil washing agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of high miscibility pressure requirements, poor oil washing efficiency of heavy components, etc., and achieve enhanced oil recovery, Easy to control and overcome the effect of low oil washing rate

Active Publication Date: 2022-03-08
SHANDONG DESHI CHEM IND CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still some problems in the practice of carbon dioxide enhanced oil recovery, such as gas channeling, high miscibility pressure requirements, strong extraction ability of carbon dioxide for light hydrocarbon components in remaining crude oil, and heavy hydrocarbon components deposited on rocks. Oil separation and washing efficiency is relatively poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 Cleansing agent 1#

[0039] (1) in N 2 Under protection, 27.6 g of formic acid, 9.0 g of formaldehyde and 8.5 g of 4-penten-1-amine were added to 95 mL of DMF, and refluxed at 95 ° C for 21 h to obtain the first reactant;

[0040] (2) in N 2 Under protection, 34.0g of the first reactant and 10.0g of potassium borohydride were added to 100mL of tetrahydrofuran, and boron trifluoride-ether solution was added dropwise while stirring at 30°C. A total of 20.0g was added dropwise. After the dropwise addition was completed, the reaction After 18 hours, the intermediate product was isolated; after mixing 6.5 g of the intermediate product, 6.0 g of NaOH and 100 mL of ethanol, 60.0 g of a hydrogen peroxide solution with a mass concentration of 30 wt % was added dropwise, and after reflux for 1 h, the second reactant was isolated;

[0041] (3) in N 2 Under protection, 8.0g benzene, 12.0g glutaric anhydride and 0.3g AlCl 3 Added into 50mL of dichloromethane, refluxed ...

Embodiment 2

[0043] Example 2 Cleansing agent 2#

[0044] The difference between embodiment 2 and embodiment 1 is that in step (1), in N 2 Under protection, 27.6 g of formic acid, 9.0 g of formaldehyde and 16.0 g of 3-phenyl-4-penten-1-amine were added to 160 mL of DMF, and refluxed at 95 ° C for 21 h to obtain the first reactant; the remaining conditions were the same as in Example 1 Same, obtain washing oil agent 2#.

Embodiment 3

[0045] Example 3 Cleansing agent 3#

[0046] The difference between embodiment 3 and embodiment 1 is that in step (3), in N 2 Under protection, 8.0g benzene, 12.0g succinic anhydride and 0.3g AlCl 3Added into 50mL of dichloromethane, and refluxed at 60°C for 24h to obtain the third reactant; other conditions were the same as in Example 1 to obtain oil washing agent 3#.

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Abstract

The application discloses an oil washing agent for carbon dioxide displacement and its preparation method and application, belonging to the field of carbon dioxide displacement oil recovery. The preparation of the oil washing agent comprises the following steps: in formic acid, the first monomer reacts with formaldehyde to obtain the first reactant; after reacting the first reactant with borane, an oxidizing agent is added and reacted under alkaline conditions to form The second reactant; the aromatic hydrocarbon and the second monomer react to obtain the third reactant, and the second reactant and the third reactant react under heating conditions to obtain the oil washing agent; wherein, the first monomer is selected from At least one of 3-phenyl-4-penten-1-amine, 4-penten-1-amine, 4-methyl-penten-1-amine and 2-amino-4-pentenoic acid The second monomer is selected from at least one of succinic anhydride, 2,3-dimethylsuccinic anhydride, glutaric anhydride and adipic anhydride; the aromatic hydrocarbon is selected from benzene, toluene and ethylbenzene at least one.

Description

technical field [0001] The application relates to an oil washing agent for carbon dioxide displacement and its preparation method and application, belonging to the field of carbon dioxide displacement oil recovery. Background technique [0002] With the increase of world energy demand, the rational development and utilization of oil has attracted great attention, and the requirements for the amount and efficiency of oil extraction are also getting higher and higher. Realizing the efficient exploitation of oil and gas resources not only has practical significance for increasing crude oil production, but also has important strategic significance. Conventional oil recovery methods (primary method and secondary method) generally only recover 1 / 3 of the crude oil geological reserves, and about 2 / 3 of the crude oil has not been recovered. Therefore, in the case of increasingly tense energy sources, enhanced crude oil recovery The rate has become a major topic in oil exploration r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/40C09K8/584
CPCC08G12/40C09K8/584
Inventor 崔仕章王黎明宋新旺郭玉玺高瑞美刘骁侯青怡
Owner SHANDONG DESHI CHEM IND CO LTD
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