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Solid asphaltene inhibitor as well as preparation method and application thereof

A technology of solid asphalt and inhibitors, which is applied in chemical instruments and methods, earthwork drilling, cleaning equipment, etc., can solve problems such as oil pipes and seepage channel blockages, achieve small dosage, excellent asphaltene deposition inhibition effect, and easy transport effect

Active Publication Date: 2021-03-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the shortcomings of current liquid asphaltene inhibitors, such as poor slow-release effect and insignificant effect of inhibiting asphaltene precipitation, the present invention provides a solid asphaltene inhibitor and its Preparation method and application to solve various problems such as oil pipe and seepage channel blockage caused by asphaltene deposition and precipitation in the process of heavy oil production

Method used

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  • Solid asphaltene inhibitor as well as preparation method and application thereof
  • Solid asphaltene inhibitor as well as preparation method and application thereof
  • Solid asphaltene inhibitor as well as preparation method and application thereof

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preparation example Construction

[0020] As discussed in the background technology, current asphaltene inhibitor products are mainly liquid products, but liquid asphaltene inhibitors have many shortcomings in the process of use, such as difficult to control the release, ineffective inhibition of asphaltene precipitation, and large consumption of chemicals, etc. . In view of this, the present invention provides a solid asphaltene inhibitor and its preparation method and application.

[0021] In one embodiment of the present invention, a solid asphaltene inhibitor is provided, which comprises the following components: ethylene-vinyl acetate copolymer, xylene and Span 80.

[0022] In a specific embodiment, the solid asphaltene inhibitor comprises the following components in mass percentage: 35-60% of ethylene-vinyl acetate copolymer, 6-20% of xylene, and 20-60% of Span 80.

[0023] The effect of the solid inhibitor in the embodiment of the present invention on the deposition of asphaltenes is manifested in two a...

Embodiment 1

[0035] The raw materials and dosage (mass percentage) of the solid asphaltene inhibitor are: 38% ethylene-vinyl acetate copolymer, 6% xylene and 56% Span 80.

[0036] The method for preparing solid asphaltene inhibitor is as follows:

[0037] Mix 38% ethylene-vinyl acetate copolymer and 6 times the mass of xylene evenly, melt and cement the reaction at 100°C, then add 56% Span 80 and mix evenly, continue heating to volatilize part of the xylene until the viscosity of the mixture is low Further increase, the content of xylene in the mixture is 6%, and the mixed mixture is extruded into a mold for molding at a molding temperature of 65° C. and a molding pressure of 6 MPa for 10 minutes to obtain a solid asphaltene inhibitor block.

Embodiment 2

[0039] The raw materials and dosage (mass percentage) of the solid asphaltene inhibitor are: 51% ethylene-vinyl acetate copolymer, 14% xylene and 35% Span 80.

[0040] The method for preparing solid asphaltene inhibitor is as follows:

[0041] Mix 51% ethylene-vinyl acetate copolymer and 6 times the mass of xylene evenly, melt and cement the reaction at 105°C, then add 35% Span 80 and mix evenly, continue heating to volatilize part of the xylene until the viscosity of the mixture is low. Further increase, the content of xylene in the mixture is 14%, and the mixed mixture is extruded into a mold for molding at a molding temperature of 60° C. and a molding pressure of 8 MPa for 10 minutes to obtain a solid asphaltene inhibitor block.

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Abstract

The invention relates to the technical field of curing technologies and asphaltene inhibition in thickened oil development, in particular to a solid asphaltene inhibitor as well as a preparation method and application thereof. The solid asphaltene inhibitor comprises 35-60% of an ethylene-vinyl acetate copolymer, 6-20% of xylene and 20-60% of span 80. The preparation method comprises the followingsteps: evenly mixing the ethylene-vinyl acetate copolymer and xylene with the mass 6 times that of the ethylene-vinyl acetate copolymer, and carrying out a melt cementing reaction at the temperatureof 100-110 DEG C; adding span 80, uniformly mixing, and continuously heating to volatilize part of xylene until the viscosity of the mixture is not increased any more and the content of xylene in themixture is 15-30%; and extruding the mixed mixture into a mold for molding to obtain a product. The solid asphaltene inhibitor is loaded into a drug carrier, is directly fed or fed through a drug feeding pipe, has the use temperature of 30-90 DEG C, the pressure of 0.1-30 MPa, the effective concentration of 0.8-1.2%, a good slow release effect, a long action period, a small dosage and low cost, has an excellent asphaltene deposition inhibition effect, has pour point depressing and paraffin control effects, and reduces the oilfield exploitation cost to a great extent.

Description

technical field [0001] The invention relates to the technical field of solidification technology and asphaltene suppression in the development of heavy oil, in particular to a solid asphaltene inhibitor and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the continuous exploitation and consumption of light oil, its reserves are gradually decreasing, and the development of heavy oil and super heavy oil has received more and more attention. my country has very rich heavy oil resources, but the asphaltene content of heavy oil is high, and factors such as changes in reservoir fluid composition, temperature and pressure during the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588C09K8/584C09K8/524E21B37/06
CPCC09K8/588C09K8/584C09K8/524E21B37/06
Inventor 范海明陈卓琦魏志毅于田田杨玉辉刘金龙董昆鹏杨红斌康万利戴彩丽
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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