High-wax thick oil pour point depressant and preparation method thereof

A pour point depressant and heavy oil technology, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as poor temperature and salt resistance, high waxy heavy oil production, unsatisfactory application effects, etc., to achieve Good heat resistance and salt resistance, reduced dosage, easy to obtain, transport and storage

Active Publication Date: 2017-02-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the unsatisfactory application effect of the pour point depressant currently used for high waxy heavy oil in crude oil exploitation, poor temperature and salt resistance, etc., a salt-resistant, temperature and salt resistant pour point depressant for high waxy oil layer development is proposed, which solves the problem of high temperature and salt resistance. Production and Lifting of Waxy Heavy Oil

Method used

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  • High-wax thick oil pour point depressant and preparation method thereof
  • High-wax thick oil pour point depressant and preparation method thereof
  • High-wax thick oil pour point depressant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Pour Point Depressant T 1 And its preparation method

[0026] (1) Pour point depressant T 1 The composition and components are as follows:

[0027] Maleic anhydride 0.2mol (19.61g)

[0028] 2-acrylamido-2-methylpropanesulfonic acid 0.002mol (0.41g)

[0029] (2) Pour point depressant T 1 The preparation method is as follows:

[0030] ①Put 19.82g of toluene and 19.61g of maleic anhydride into a four-necked flask, and pass N 2 Protect, heat to 30℃ and stir at 100rpm for 10min; Dissolve 0.41g 2-acrylamido-2-methylpropanesulfonic acid in 0.41gN,N-dimethylformamide, then pour it into a four-neck flask ; Dissolve 0.12g benzoyl peroxide into 1.98g toluene, place it in a constant pressure dropping funnel, and control the dropping rate to 4 drops / min. Subsequently, the stirring rate was increased to 200 rpm, the temperature was raised to 70° C., and the reaction was held at a constant temperature for 5 hours. After the reaction, 0.16 g of hydroquinone was added, the heating de...

Embodiment 2

[0034] (1) Pour point depressant T 2 The composition and components are as follows:

[0035] Maleic anhydride 0.2mol (19.61g)

[0036] 2-acrylamido-2-methylpropanesulfonic acid 0.2mol (41.45g)

[0037] (2) Pour point depressant T 2 The preparation method is as follows:

[0038] ①Add 91.59g of xylene and 19.61g of maleic anhydride into a four-necked flask, and pass N 2 Protect, heat to 30℃ and stir at 150rpm for 30min; Dissolve 41.45g 2-acrylamido-2-methylpropanesulfonic acid in 49.74g N,N-dimethylacetamide, then pour it into a four-neck flask Medium; Dissolve 1.53g of azobisisobutyronitrile into 24.42g of toluene, place it in a constant pressure dropping funnel, and control the dropping rate to 6 drops / min. Subsequently, the stirring rate was increased to 300 rpm, the temperature was increased to 90° C., and the reaction was held at a constant temperature for 10 hours. After the reaction, 0.85 g of hydroquinone was added, the heating device was turned off, and the mixture was stirred...

Embodiment 3

[0041] Example 3: Pour Point Depressant T 3 And its preparation method

[0042] (1) Pour point depressant T 3 The composition and components are as follows:

[0043] Maleic anhydride 0.2mol (19.61g)

[0044] 2-acrylamido-2-methylpropanesulfonic acid 0.01mol (2.07g)

[0045] (2) Pour point depressant T 3 The preparation method is as follows:

[0046] ① Put 28.18g of toluene and 19.61g of maleic anhydride into a four-necked flask, and pass N 2 Protect, heat to 30℃ and stir at 120rpm for 25min; Dissolve 2.07g 2-acrylamido-2-methylpropanesulfonic acid in 2.48g N,N-dimethylformamide, then pour into a four-neck flask Medium; Dissolve 0.22g azobisisobutyronitrile into 4.34g toluene, place it in a constant pressure dropping funnel, and control the dropping rate to 5 drops / min. Subsequently, the stirring rate was increased to 220 rpm, the temperature was raised to 75° C., and the reaction was held at a constant temperature for 6 hours. After the reaction, 0.22 g of hydroquinone was added, the ...

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Abstract

The invention discloses a high-wax thick oil pour point depressant and a preparation method thereof, and belongs to the field of polymer material preparation. The pour point depressant is formed by copolymerizing maleic anhydride and 2-acrylamido-2-methylpropanesulfonic acid according to a molar ratio of 1:0.01-1, and has a molecular weight of 3000-100000 g/mol. The pour point depressant has good temperature and salt resistance, the resisting temperature reaches 140 DEG C, and the resisting salinity reaches 200000 mg/L; and the pour point depressant also has a good pour point depression effect, and can reduce the freezing point of thick oil with the wax content of 30-40% by 6 DEG C or above. The pour point depressant can be widely applied to pour point depression of high-wax thick oil wells.

Description

Technical field [0001] The invention relates to a pour point depressant used in the exploitation of high waxy heavy oil, in particular to a pour point depressant for high waxy heavy oil and a preparation method thereof. Background technique [0002] In today's world, energy is closely related to production and life, and energy has become the main object of competition for all countries in the world, the most important of which is oil resources. There are many oil fields in my country that produce high-wax crude oil. At present, electric heating with higher energy consumption is mainly used to solve such problems, which often brings negative effects such as high cost, large pollution, and small effect range. [0003] At present, there are many technologies for wax-degrading heavy oil exploitation at home and abroad, such as dynamic liquid method, steam method, microbial method, organic solvent method, formation heating method, thermal cracking method, water injection method, pour po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/588C08F222/06C08F220/58
CPCC08F222/06C09K8/588C08F220/585
Inventor 郑万刚马爱青张全胜邹斌于昭东万惠平曲丽刘艳平沈静姜东波
Owner CHINA PETROLEUM & CHEM CORP
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