Corrosion inhibitor suitable for acidification at 200 DEG C as well as preparation method and application of corrosion inhibitor

A technology of corrosion inhibitor and synergist for acidification, which is applied in the direction of chemical instruments and methods, scale removal and water softening, drilling compositions, etc. It can solve the problems that cannot meet the deep layer and achieve the effect of reducing the risk of corrosion

Pending Publication Date: 2022-07-19
PETROCHINA CO LTD
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Corrosion inhibitors for acidification provided by related technologies can no longer meet the needs of deep and ultra-deep reservoirs with temperatures reaching 200°C

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Corrosion inhibitor suitable for acidification at 200 DEG C as well as preparation method and application of corrosion inhibitor
  • Corrosion inhibitor suitable for acidification at 200 DEG C as well as preparation method and application of corrosion inhibitor
  • Corrosion inhibitor suitable for acidification at 200 DEG C as well as preparation method and application of corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] This embodiment provides a corrosion inhibitor for acidification, and the corrosion inhibitor for acidification includes component A and component B.

[0037] Wherein, component A is prepared by the following method:

[0038] Add 30 parts of aldosterone amine condensate to the reaction kettle, and heat the aldosterone amine condensate to 40-50°C, then add 5 parts of chlorinated-1-benzyl quinoline salt and 10 parts of propyne in turn under stirring The alcohol propoxy compound, 17 parts of formic acid, 19 parts of formamide, 9 parts of ethylene glycol, and 10 parts of O-20 are mixed uniformly to obtain the component A of this embodiment, which is recorded as formula 1.

[0039] Component B in this embodiment is potassium pyroantimonate, and the mass ratio of component A to component B is 5.0:1.5.

Embodiment 2

[0041] This embodiment provides a corrosion inhibitor for acidification, and the corrosion inhibitor for acidification includes component A and component B.

[0042] Add 35 parts of aldosterone amine condensate to the reaction kettle, and heat the aldosterone amine condensate to 40-50 ° C, then add 10 parts of propargyl alcohol propoxy compound, 17 parts of formic acid, 19 parts of Formamide, 9 parts of ethylene glycol, and 10 parts of O-20 were mixed uniformly to obtain component A of this embodiment, which is designated as formula 2.

[0043] Component B in this embodiment is potassium pyroantimonate, and the mass ratio of component A to component B is 5.0:1.5.

Embodiment 3

[0045] This embodiment provides a corrosion inhibitor for acidification, and the corrosion inhibitor for acidification includes component A and component B.

[0046] Wherein, component A is prepared by the following method:

[0047] Add 30 parts of aldosterone amine condensate to the reaction kettle, and heat the aldosterone amine condensate to 40-50 ° C, then add 5 parts of chlorinated-1-benzyl quinoline salt and 10 parts of propyne in turn under stirring The alcohol ethoxy compound, 17 parts of acetic acid, 19 parts of N,N-dimethylformamide, 9 parts of ethanol, and 10 parts of O-20 were mixed uniformly to obtain the component A of this example, which is designated as formula 3.

[0048] Component B in this embodiment is sodium molybdate, and the mass ratio of component A to component B is 5.0:1.5.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a corrosion inhibitor suitable for acidification at 200 DEG C as well as a preparation method and application of the corrosion inhibitor. The corrosion inhibitor for acidification comprises a component A, and the component A comprises the following components in percentage by weight: 30-45% of aldehyde-ketone-amine condensate, 10-20% of a corrosion inhibitor, 5-10% of a corrosion inhibitor and the balance of water. 5%-8% of quinoline quaternary ammonium salt; 1%-10% of organic acid; 3%-10% of an alkynol derivative; 15%-40% of an organic synergist; 5%-15% of an alcohol solvent; 5%-15% of a dispersant; and the balance of water. The quinoline quaternary ammonium salt is synthesized by performing quaternization reaction on one or a combination of more than two of benzyl chloride, benzyl carbinol, benzyl propanol and hexadecyl dimethyl benzyl ammonium chloride and quinoline. The corrosion rate of the corrosion inhibitor for acidification meets the first-level index requirement of the petroleum and natural gas industry.

Description

technical field [0001] The invention relates to the technical field of oil and gas reservoir stimulation and transformation, in particular to a corrosion inhibitor suitable for acidification at 200° C., a preparation method and application. Background technique [0002] Acidizing is an important measure for stimulation and stimulation of oil and gas wells. Acid is injected into the formation through the wellbore, and the chemical reaction between the acid and some minerals in the formation is used to dissolve the connected pores or fracture wall rocks in the reservoir, and increase the communication between pores and fracture conductivity. ability to achieve the purpose of increasing the production of oil and gas wells. During the acidizing process, the acid liquid will corrode the downhole pipe string, so it is necessary to add a corrosion inhibitor to the acid liquid, so as to inhibit or slow down the corrosion of the acid liquid to the downhole pipe string. [0003] In t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C23F11/04
CPCC23F11/04C09K8/74C09K8/54C02F5/12
Inventor 张兴德原励张燕黄晨直王川刘爽吴丽
Owner PETROCHINA CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap