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A kind of compound stabilizer and its preparation and use method

A stabilizer and compound technology, which is applied in the field of oil and gas development, can solve the problems of high operating temperature and high energy consumption of heating and flash evaporation

Active Publication Date: 2020-08-07
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Negative pressure flash evaporation adds an air extraction compressor, the heating flash operation temperature is high, and the energy consumption is large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The invention provides a compound stabilizer, which comprises the following components in mass percentage: 35%-49% of a drag reducer, 15%-25% of a stabilizer, and 30%-50% of an oil-soluble demulsifier;

[0036] The drag reducer is an oil-soluble drag reducer, which consists of the following components in mass percentage: 35% to 49% of stearyl methacrylate, 15% to 25% of maleic anhydride, 29% to 45% of xylene, Azobisisobutyronitrile 0.5% to 1.0%, acrylamide 0.1% to 0.5%.

[0037] The compound stabilizer of the present invention can reduce the storage medium temperature by 4°C-6°C by adding the compound stabilizer on the premise of not affecting the transport fluidity of the storage medium, and the lowering of the temperature can reduce the volatilization of organic matter; A small amount of waxy component in crude oil reacts to form a stable film on the liquid surface, which is beneficial to reduce the volatilization of organic matter.

Embodiment 2

[0039] On the basis of the foregoing examples, the drag reducer is an oil-soluble drag reducer, mainly composed of stearyl methacrylate (C 22 h 42 o 2 ), maleic anhydride (C 4 h 2 o 3 ), xylene (C 8 h 10 ), azobisisobutyronitrile (C 8 h 12 N 4 ), acrylamide (C 3 h 5 NO) composition, the proportion of various substances in the drag reducer is: stearyl methacrylate 35% ~ 49%, maleic anhydride 15% ~ 25%, xylene 29% ~ 45%, azo Diisobutyronitrile 0.5% to 1.0%, acrylamide 0.1% to 0.5%.

[0040] The oil-soluble drag reducer is mainly used to lower the transportation temperature and reduce the volatilization of oil and gas.

Embodiment 3

[0042] On the basis of the above examples, the stabilizer is prepared from the following components in mass percentage: 50%-65% of stearic acid, 30%-45% of citric acid, and 3%-10% of beeswax. Stearic acid reacts with low-valent metal ions inherent in the medium in the storage tank to form a light fatty film floating on the surface of the medium to prevent oil and gas volatilization; citric acid reacts with high-valent metal ions in the medium to form a stable compound, reducing its activation; beeswax Stimulates lipid membranes to float.

[0043] The stabilizer reacts with a small amount of waxy components in crude oil to form a stable film on the liquid surface, which is beneficial to reduce the volatilization of organic matter

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PUM

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Abstract

The invention discloses a compound stabilizing agent and a preparation method and use method thereof. The compound stabilizing agent comprises following components in percentage by weight: 35 to 49% of drag reducer, 15 to 25% of stabilizing agent, and 30 to 50% of oil soluble demulsifier. The preparation method comprises following steps: (1) preparing a drag reducer with a formula amount; (2) preparing a stabilizing agent, diluting the stabilizing agent based on the formula, and saving diluted stabilizing agent for later use; (3) dissolving an oil soluble demulsifier with a formula amount intoa propylene glycol solvent; and (4) mixing three agents to obtain the compound stabilizing agent. The provided compound stabilizing agent can be applied to gathering, transporting, and storing of petroleum and natural gas and can also be used to reduce the discharge of volatile organic compounds (VOCs). The provided compound stabilizing agent can reduce the temperature of a storage medium by 4-6DEG C without influencing the fluidity of the storage medium. The amount of volatized organic substances is reduced after the temperature is reduced. At the same time, the stabilizing agent can reactwith a micro wax component in crude oil, a stable thin film is formed on the liquid surface, and the amount of volatized organic substances is further reduced.

Description

technical field [0001] The invention belongs to the technical field of petroleum and natural gas development, and in particular relates to a compound stabilizer and its preparation and use method. Background technique [0002] Crude oil is a mixture of hydrocarbons, in which low-carbon hydrocarbons C1-C4 are gases at normal temperature and pressure. When these light hydrocarbons volatilize from crude oil during gathering, transportation and storage, they will take away other components such as pentane and hexane, resulting in the loss of crude oil during storage and transportation and polluting the environment. [0003] At present, oil and gas field development and production enterprises mainly remove volatile light components such as methane, ethane, propane, butane from crude oil by reducing the vapor pressure of crude oil, so that they can be kept stable under normal pressure. , to reduce evaporation loss, the commonly used technical methods are as follows: [0004] (1)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/52C09K8/524F17D1/17
CPCC09K8/52C09K8/524C09K2208/28F17D1/17
Inventor 张海玲周立辉冀忠伦穆谦益周娟邱奇任鹏刘沛华李照林任小荣蒋继辉杨琴赵敏李岩张璇
Owner PETROCHINA CO LTD
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