Oil-soluble asphaltene dispersing blockage remover

A plugging remover, oil-soluble technology, applied in the field of oil-soluble asphaltene dispersion plugging remover, can solve the problems of crude oil composition change, fluorine or chlorine content, oil well shutdown or scrapping, etc., to prevent asphaltene precipitation, preparation process Simple and safe performance

Active Publication Date: 2014-07-02
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of temperature, pressure, water injection and the incompatibility of external fluids during the development process, the composition of crude oil changes, which destroys the equilibrium state of the crude oil system, causing asphaltenes to flocculate and deposit from the crude oil, and then block the oil layer, near-well zone, and wellbore , gathering and transportation pipelines, processing containers, etc., and even cause oil wells to be shut down or scrapped, affecting the development effect and economic benefits of the oil field
[0003] In recent years, the plugging removal technology used in oil wells has attracted much attention, but the dispersed plugging removal agents currently used in oil fields are highly specific and can only partially solve the problems caused by the precipitation of asphaltene; once the composition of crude oil occurs Changes, the plugging effect of the dispersed plugging remover will change greatly; and these dispersed plugging removers have problems such as low flash point, poor safety performance, or environmental pollutants such as fluorine or chlorine in the reagent.

Method used

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  • Oil-soluble asphaltene dispersing blockage remover

Examples

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Comparison scheme
Effect test

Embodiment 1

[0017] This embodiment provides an oil-soluble asphaltene dispersion plugging remover, based on the total weight of the dispersed plugging removal agent, its raw material composition includes: aromatic hydrocarbons: 10% benzene, toluene and xylene mixed in any proportion, ketone : Oxyphenone 45%, organic acid salt: CH 3 CH 2 CH(CH 3 ) 2 COONH 4 15%, mixed acrylate: CH 2 =CH-COOR (R is normal alkanes of C15 and C16) 12%, ionic surfactant: sodium dodecylbenzenesulfonate 10%, oil-soluble penetrant: 2-octyl alcohol polyoxyethylene ether (JFC) 8%; the oil-soluble asphaltene dispersion plugging agent is prepared by the following method: aromatic hydrocarbons, ketones, organic acid salts, acrylic acid mixed esters, ionic surfactants and oil-soluble penetrating agents are added to the reactor, and then 45 Stirring at a constant temperature of -85°C for 1-3 hours to obtain the oil-soluble asphaltene-dispersed plug-removing agent. The open flash point of the disperse plugging remo...

Embodiment 2

[0019] This embodiment provides an oil-soluble asphaltene dispersing plugging remover, based on the total weight of the dispersed plugging removing agent, its raw material composition includes: aromatics: 15% toluene, ketone: 40% phenyloctyl ketone, organic acid salts :CH 3 CH 2 CH 2 CH 2 CH 2 CH 2 COONH 4 15%, mixed acrylate: CH 2 =CH-COOR (R is C16-C18 normal alkanes) 10%, ionic surfactant: sodium dodecylbenzenesulfonate 10%, oil-soluble penetrant: lauryl polyoxyethylene ether (AEO) 10 %; The preparation method of the oil-soluble asphaltene dispersion plugging agent is the same as the preparation method in Example 1. The open flash point of the dispersed plug-removing agent was measured, and the results are shown in Table 1.

Embodiment 3

[0021] This embodiment provides an oil-soluble asphaltene dispersing plug-removing agent, based on the total weight of the dispersed plug-removing agent, its raw material composition includes: aromatic hydrocarbon: 15% xylene, ketone: 40% phenyloctylone, organic acid Salt: CH 3 CH 2 CH(CH 3 ) 2 COONH 4 15%, mixed acrylate: CH 2 =CH-COOR (R is C16-C18 n-paraffin) 8%, ionic surfactant: sodium dodecylbenzenesulfonate 15%, oil-soluble penetrating agent: isooctyl alcohol polyoxyethylene ether (JFC- E) 7%; the preparation method of this oil-soluble asphaltene dispersion plugging remover is the same as that in Example 1. The open flash point of the dispersed plug-removing agent was measured, and the results are shown in Table 1.

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Abstract

The invention provides an oil-soluble asphaltene dispersing blockage remover. In terms of the total weight of the dispersing blockage remover, the dispersing blockage remover is prepared from the following raw materials: 10-20% of aromatic hydrocarbon, 35-45% of acetone, 15-20% of organic acid salt, 5-18% of acyclic mixed ester, 5-20% of ionic surfactant and 5-15% of oil-soluble penetrant. Compared with the existing asphaltene dispersing blockage remover, the dispersing blockage remover has an open cup flash point above 65 DEG C, and is good in safety performance, and has the advantages of simple preparation process, low price, high asphaltene deposit blockage removing efficiency, low dosage, no organic chloride and the like. The oil-soluble asphaltene dispersing blockage remover is capable of the blockage problems of colloids, colloid and partial wax and thus applicable to removing the blockage in an oil-well exploitation process, and also has excellent blockage prevention effect.

Description

technical field [0001] The invention relates to an oil-soluble asphaltene dispersing and plugging-removing agent, which belongs to the technical field of petroleum exploitation. Background technique [0002] In the process of oilfield development, especially in the production of heavy oil wells, clogging is a serious problem that accompanies all the time. Generally speaking, under stable reservoir geological conditions, the petroleum colloidal system is in a state of thermodynamic equilibrium. Due to the influence of temperature, pressure, water injection and the incompatibility of external fluids during the development process, the composition of crude oil changes, which destroys the equilibrium state of the crude oil system, causing asphaltenes to flocculate and deposit from the crude oil, and then block the oil layer, near-well zone, and wellbore , gathering and transportation pipelines, processing containers, etc., and even cause oil wells to be shut down or scrapped, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/524
CPCC09K8/524
Inventor 郭继香张丹丹甄建伟董国艳宋学超郭强刘志明张岚
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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