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Asphaltene dispersant for high pourpoint heavy oil

A technology of asphaltene dispersant and high-condensation heavy oil, which is applied in gas/liquid distribution and storage, drilling composition, pipeline system, etc., to achieve significant economic benefits, good temperature resistance, and prevent deposition

Active Publication Date: 2017-06-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the current problems encountered in domestic high-condensation heavy oil production, and proposes a dispersant for asphaltene deposits. The dispersant does not have the problem of subsequent demulsification and dehydration, and can not only be used for removing blockages in heavy oil wells, Moreover, it has a better dispersing effect on the blockage near the wellbore

Method used

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  • Asphaltene dispersant for high pourpoint heavy oil
  • Asphaltene dispersant for high pourpoint heavy oil
  • Asphaltene dispersant for high pourpoint heavy oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Highly poured viscous oil asphaltene dispersant G 1 and its preparation method

[0032] (1) Asphaltene Dispersant G for High Pouring Viscous Oil 1 The composition, components and molecular formula are as follows:

[0033] Asphaltene Dispersant G 1 The intermediate is first reacted with decanal and epibromohydrin, and then pyrrole is reacted with the intermediate to generate the final product. The molecular formula of the high-condensing asphaltene dispersant is as follows:

[0034]

[0035] The molar ratio of decanal, epibromohydrin and pyrrole is 1:1:1.

[0036] (2) Asphaltene Dispersant G for High Pouring Viscous Oil 1 The preparation method is as follows:

[0037] ①In a four-necked flask equipped with an electromagnetic stirrer, a reflux condenser and a thermometer, add 0.1mol of decanal, 31.2g of carbon tetrachloride and 1.56g of BF 3 ·Et 2 O solution was heated while stirring, the stirring rate was 220rpm, the stirring time was 10min, and the he...

Embodiment 2

[0042] Example 2 Highly poured viscous oil asphaltene dispersant G 2 and its preparation method

[0043] (1) Asphaltene Dispersant G for High Pouring Viscous Oil 2 The composition, components and molecular formula are as follows:

[0044] Asphaltene Dispersant G 2 The reaction between dodecanal and epibromohydrin first generates an intermediate, and then reacts pyrrole with the intermediate to generate the final product. The molecular formula of the high-condensing thick oil asphaltene dispersant is as follows:

[0045]

[0046] The molar ratio of dodecanal, epibromohydrin and pyrrole is 1:1.2:1.1.

[0047] (2) Asphaltene Dispersant G for High Pouring Viscous Oil 2 The preparation method is as follows:

[0048] ①In a four-necked flask equipped with an electromagnetic stirrer, a reflux condenser and a thermometer, add 0.1mol of dodecanal, 55.2g of carbon tetrachloride and 3.68g of BF 3 ·Et 2 O solution was heated while stirring, the stirring rate was 260rpm, the stirrin...

Embodiment 3

[0053] Example 3 Highly poured viscous oil asphaltene dispersant G 3 and its preparation method

[0054] (1) Asphaltene Dispersant G for High Pouring Viscous Oil 3 The composition, components and molecular formula are as follows:

[0055] Asphaltene Dispersant G 3 The intermediate is first reacted with tetradecaldehyde and epibromohydrin, and then pyrrole is reacted with the intermediate to generate the final product. The molecular formula of the high-condensing thick oil asphaltene dispersant is as follows:

[0056]

[0057] The molar ratio of tetradecaldehyde, epibromohydrin and pyrrole is 1:1.3:1.2.

[0058] (2) Asphaltene Dispersant G for High Pouring Viscous Oil 3 preparation method

[0059] ①In a four-necked flask equipped with an electromagnetic stirrer, a reflux condenser and a thermometer, add 0.1mol of tetradecanal, 53.0g of acetonitrile and 6.36g of BF 3 ·Et 2 O solution was heated while stirring, the stirring rate was 200rpm, the stirring time was 15min, ...

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Abstract

The invention discloses an asphaltene dispersant for high pourpoint heavy oil. The asphaltene dispersant is prepared by the steps of firstly reacting high-class fatty aldehyde and epibromohydrin to generate an intermediate, and then reacting pyrrole and the intermediate to generate a final product. The asphaltene dispersant for the high pourpoint heavy oil has a molecular formula as shown in the description, wherein in the formula, n is a natural number which is larger than or equal to 9 and less than or equal to 15. The molar ratio of the high-class fatty aldehyde to the epibromohydrin to the pyrrole is 1:(1 to 1.5):(1 to 1.23), and is optimally 1:1.2:1.1. According to the asphaltene dispersant provided by the invention, water has no need to be added during an operation process, so that the problem of follow-up demulsification and dehydrationis avoided; the dosage is less, the economical benefit is remarkable, and when the dosage is 200ppm, the solubility of high pourpoint heavy oilasphaltene with a solidifying point being higher than 40 DEG C reaches more than 40 percent; meanwhile, the salt tolerance and temperature resistance properties are good, the temperature resistance reaches 150 DEG C, and the mineralization resistance reaches 200,000mg / L; the asphaltene dispersant has high universality, and can be adapt to different types of high pourpoint heavy oil. Therefore, the asphaltene dispersant provided by the invention can be widely applied in high pourpoint heavy oilexploitation and transportation.

Description

technical field [0001] The invention relates to an asphaltene deposit dispersant used in the process of heavy oil exploitation, in particular to an asphaltene dispersant for high pouring thick oil. Background technique [0002] In recent years, as the crude oil tends to be heavy and inferior, the harm of asphaltene deposition to crude oil gathering, transportation and processing has been paid more and more attention. Asphaltene is the heaviest and most polar component of petroleum components. There are many interactions between asphaltenes, such as π-π interaction between aromatic nuclei, acid-base interaction between heteroatoms, hydrogen bonding, charge transfer between metal elements, etc. Due to the existence of these forces, asphaltenes have a strong tendency to self-associate. Asphaltene deposition during crude oil extraction will block reservoir pores, oil wells and pipelines, reverse the wettability of the rock surface, cause reservoir damage and reduce recovery; a...

Claims

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Application Information

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IPC IPC(8): C07D405/06C09K8/58C09K8/524F17D1/16
CPCC07D405/06C09K8/524C09K8/58F17D1/16
Inventor 马爱青张雷郑万刚何旭谢志勤陈连喜孙克己赵晓
Owner CHINA PETROLEUM & CHEM CORP
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