Non-polyether type thick oil demulsifying agent and preparation thereof

A non-polyether and demulsifier technology, applied in the field of oil field crude oil demulsifier and its preparation, can solve the problems of poor demulsification effect and complicated preparation process of heavy oil

Active Publication Date: 2008-09-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of complex preparation process and poor demulsification effect of heavy oil in the existing non-polyeth

Method used

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  • Non-polyether type thick oil demulsifying agent and preparation thereof
  • Non-polyether type thick oil demulsifying agent and preparation thereof
  • Non-polyether type thick oil demulsifying agent and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A four-neck flask equipped with a stirrer and a condensing reflux device was placed in a water bath, and the temperature of the water bath was raised to 60° C., 41.4 grams of butyl acrylate and 55 grams of xylene were added, stirred evenly, replaced with nitrogen and continuously fed with nitrogen. Add 0.25 g of azobisisobutyronitrile as an initiator, stir evenly and add 1.1 g of acrylic acid, start to add acrylic acid dropwise after 15 minutes, add 2.2 g dropwise within 4 hours, and continue to react for 4 hours after the dropwise addition is completed. Thereafter, add 0.3 gram of hydroquinone as a terminator, then react at a constant temperature for 0.5 hours, then lower the temperature to obtain a white solution, according to the People's Republic of China national standard GB / T 1668-95 plasticizer acid value and the mensuration of acidity, use acid The carboxyl content was measured by alkali titration, and it was found that 7.40% of acrylic acid units were contained,...

Embodiment 2

[0022] A four-neck flask equipped with a stirrer and a condensing reflux device was placed in a water bath, and the temperature of the water bath was raised to 60° C., 41.4 grams of butyl acrylate and 55 grams of xylene were added, stirred evenly, replaced with nitrogen and continuously fed with nitrogen. Add 0.25 g of azobisisobutyronitrile as an initiator, stir evenly, add 1.1 g of acrylic acid, add 1.1 g of acrylic acid every 1.5 hours, add acrylic acid three times, the total amount is 3.3 g, and continue the reaction at 60° C. for 4 hours. Thereafter, add 0.3 gram of hydroquinone as a terminator, then react at a constant temperature for 0.5 hours, then lower the temperature to obtain a white solution, according to the People's Republic of China national standard GB / T 1668-95 plasticizer acid value and the mensuration of acidity, use acid The carboxyl content was measured by alkali titration, and it was found that 7.38% of acrylic acid units were contained, the number averag...

Embodiment 3

[0024] The preparation method is the same as in Example 2, except that the solvent is methyl ethyl ketone, the amount of acrylic acid added in batches is 4.8 grams, and the total amount of acrylic acid is 14.4 grams. According to the national standard GB / T 1668-95 of the People's Republic of China for the determination of the acid value and acidity of plasticizers, the carboxyl content of the product was determined by acid-base titration, and it was found that it contained 25.85% of acrylic acid units, and the number average molecular weight was 72,000. Molecular weight distribution M w / M n is 2.95.

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Abstract

The non-polyether demulsifying agent for thick oil of disclosed by the invention pertains to crude petroleum demulsifying agent for oilfield. The non-polyether demulsifying agent prepared by solution co-polymerization using butyl acrylate and acrylic acid as raw material is proposed to solve the problems of conventional non-polyether demulsifying agent which are complexity in preparation and bad demulsifying effect. The invention adopts method of solution polymerization, improves monomer charging method by charging butyl acrylate in one time, and charging active monomer acroleic acid batchwisely or continuously in copolymerizing process. The copolymer has good amphipathic property, good demulsifying effect, and is suitable for thich oil.

Description

technical field [0001] The invention relates to an oil field crude oil demulsifier and a preparation method thereof, more specifically, the invention relates to a non-polyether oil field heavy oil demulsifier and a preparation method thereof. Background technique [0002] The production fluid of heavy oil is mostly W / O emulsion like other crude oil production fluid, and its water content is 30%-50%. Because heavy oil contains high oil-water interface active substances such as colloids and asphaltene, the produced fluid of heavy oil has high viscosity, poor rheology, and the strength of interfacial film increases. The droplets are in the state of microemulsion and are stably dispersed in the continuous phase. middle. On the other hand, in the late stage of secondary oil recovery and tertiary oil recovery, various stimulation measures such as acidizing, fracturing, water shutoff, and profile control were implemented, and various chemical agents (including polymers used in the...

Claims

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Application Information

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IPC IPC(8): C10G33/00
Inventor 梁泽生徐伟田云峰陈雅萍
Owner CHINA PETROLEUM & CHEM CORP
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