Ultrahigh-temperature-resistant low-viscosity low-corrosion emulsifier and preparation method thereof, and emulsified acid system and preparation method thereof

A low-viscosity, low-corrosion technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of unusability, reduced performance, high temperature resistance, etc., to improve the working distance, mild corrosion, strong application sexual effect

Inactive Publication Date: 2020-04-03
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an emulsifier with ultra-high temperature resistance, low viscosity and low corrosion, an emulsified acid system and its preparation method, so as to solve the problem that the existing emulsified acid system has reduced performance or even cannot be used due to its inability to withstand high temperatures

Method used

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  • Ultrahigh-temperature-resistant low-viscosity low-corrosion emulsifier and preparation method thereof, and emulsified acid system and preparation method thereof
  • Ultrahigh-temperature-resistant low-viscosity low-corrosion emulsifier and preparation method thereof, and emulsified acid system and preparation method thereof
  • Ultrahigh-temperature-resistant low-viscosity low-corrosion emulsifier and preparation method thereof, and emulsified acid system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The ultra-high temperature-resistant, low-viscosity and low-corrosion emulsifier of this embodiment is prepared by the following method:

[0033] (1) Preparation of component A:

[0034] Weigh 1mol of butanolamine and dissolve it in 50Ml absolute ethanol.

[0035] Weigh 2mol of epichlorohydrin, and dropwise add epichlorohydrin to the organic solvent of butanolamine at a speed of 7ml / min, react at room temperature for 10 hours and then distill off the solvent under reduced pressure, and pump the oil for 3 hours, A colorless highly viscous transparent liquid was obtained with a yield of 96.8%.

[0036] Add 1mol of butanolamine and the linker formed by the reaction with oxychloropropane and 2mol of erucylpropyldimethyl tertiary amine into a single-necked flask, add 50ml of absolute ethanol, and heat up to 80°C in an oil bath , condensed and refluxed for 10 h, and then the solvent was removed by rotary distillation to obtain component A in the form of a yellow-brown paste...

Embodiment 2

[0049] The ultra-high temperature-resistant, low-viscosity and low-corrosion emulsifier of this embodiment is prepared by the following method:

[0050] (1) Preparation of component A:

[0051] Weigh 1mol of butanolamine and dissolve it in 50Ml absolute ethanol.

[0052] Weigh 2mol of epichlorohydrin, and dropwise add epichlorohydrin into the organic solvent of butanolamine at a speed of 6ml / min, react at room temperature for 9 hours, and then distill off the solvent under reduced pressure, and pump the oil for 3 hours, A colorless and highly viscous transparent liquid was obtained with a yield of 95.4%.

[0053] Add 1mol of butanolamine and the linker formed by the reaction with oxychloropropane and 2mol of erucylpropyldimethyl tertiary amine into a single-necked flask, add 50Ml of absolute ethanol, and heat up to 85°C in an oil bath , condensed and refluxed for 9 hours, and then the solvent was removed by rotary distillation to obtain a yellow-brown paste, which was compon...

Embodiment 3

[0066] The ultra-high temperature-resistant, low-viscosity and low-corrosion emulsifier of this embodiment is prepared by the following method:

[0067] (1) Preparation of component A:

[0068] Weigh 1 mol of butanolamine and dissolve it in 50 mL of absolute ethanol.

[0069] Weigh 3mol of epichlorohydrin, and dropwise add epichlorohydrin to the organic solvent of butanolamine at a speed of 6ml / min, react at room temperature for 12 hours and then distill off the solvent under reduced pressure, and pump the oil for 3 hours, A colorless and highly viscous transparent liquid was obtained with a yield of 95.4%.

[0070] Add 1mol of butanolamine and the linker formed by the reaction with oxychloropropane and 3mol of erucylpropyldimethyl tertiary amine into a single-necked flask, add 50mL of absolute ethanol, and heat up to 70°C in an oil bath , condensed and refluxed for 12 hours, and then the solvent was removed by rotary distillation to obtain a yellowish-brown paste and compon...

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Abstract

The invention discloses an ultrahigh-temperature-resistant low-viscosity low-corrosion emulsifier and a preparation method thereof, and an emulsified acid system and a preparation method thereof, andbelongs to the technical field of oil and gas field development and acidification. The emulsifier is prepared by taking butanol amine, 1, 6-butanediamine and diallylamine as raw materials, and the emulsified acid system has very high applicability at different temperatures, particularly has very high stability in an ultrahigh-temperature well, and has the advantages of low viscosity, low frictionresistance, slight corrosion to metal pipes and the like.

Description

technical field [0001] The invention relates to the technical field of acidification for oil and gas field development, in particular to an ultra-high temperature-resistant, low-viscosity, and low-corrosion emulsifier, an emulsified acid system and a preparation method thereof. Background technique [0002] In the later stage of oil and gas production, acidizing is often used to increase production due to reasons such as low production. Hydrochloric acid is often used in acidizing construction. Hydrochloric acid is a non-oxidizing acid. The injection of acid into the dissolution and penetration channels will produce artificial cracks and dredge pores, so the recovery rate can be greatly improved. However, in the acidizing process for carbonate rocks, long fractures cannot be effectively formed because the acid rocks react very quickly. In order to solve the problem of fast reaction speed of acid rock, an emulsified acid system is proposed through the experimental research o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/72C09K8/74
CPCC09K8/72C09K8/74C09K2208/30C09K2208/32C09K8/54C09K8/602
Inventor 毛金成韩涤非杨小江张恒林冲毛金桦赵金洲
Owner SOUTHWEST PETROLEUM UNIV
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