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Cryogenic dewatering demulsifier of crude-oil extract

A technology of production fluid and demulsifier, which is applied in the fields of hydrocarbon oil dehydration/demulsification, petroleum industry, etc., and can solve problems such as low-temperature dehydration of crude oil production fluid

Active Publication Date: 2007-09-05
PETROCHINA CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Solve the problem of low temperature dehydration of crude oil production fluid

Method used

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Examples

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Effect test

Embodiment 1

[0035] Embodiment 1: Utilize the present invention to carry out dehydration test at three combined stations of Huabei Oilfield respectively since June 2006, the crude oil temperature is 25~35 ℃, the added amount of dehydration low-temperature demulsifier of crude oil production fluid is 50~80mg / l When the oil is removed, the water content of the crude oil is less than 0.2%, and the oil content of the sewage is less than 500mg / l. Solve the problem of low temperature dehydration of crude oil production fluid.

[0036] The formula and production process of the low temperature demulsifier are: first, 12% polyvinylidene polyamine polyoxypropylene polyoxyethylene ether, 12.5% ​​polyamine polyoxypropylene polyoxyethylene ether, 0.08% FC-N01 fluorocarbon Surfactant and 32% alkylphenol formaldehyde resin polyoxypropylene polyoxyethylene ether four kinds of raw materials are added into the enamel reaction kettle in proportion by weight. Slowly heat up to 70-75°C. Under continuous stir...

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Abstract

A low-temperature crude-oil extract dewatering demulsifier consists of polyamines polyoxytrimethylene polyethenoxy ether 10-15wt%, alkyl phenolic resin polyoxytrimethylene polyethenoxy ether 30-40wt%, polyethyl-polyamines polyoxytrimethylene polyethenoxy ether 10-15wt%, FC-NO1 fluorocarbon surface active agent 0.05-0.2wt%, methanol 20-25wt% and water 15-22wt%. The crude-oil dewatering temperature is between 25-35degree, additive amount is between 50-80mg / l, water content is <0.2% and oil content of sewage is <500mg / l.

Description

technical field [0001] The invention belongs to the technical field of chemicals used in the petroleum industry, and in particular relates to a low-temperature demulsifier formula for crude oil production fluid dehydration and a preparation method thereof. It is suitable for dehydration and low-temperature demulsifier with a dosage of 50-80 mg / l when the crude oil temperature is 25-35 °C. Background technique [0002] Demulsifier is one of the oilfield chemicals used in a large amount in the petroleum industry, mainly used in the process of crude oil gathering and transportation. After the crude oil is extracted from the oil well, it must first be dehydrated in a joint station or a treatment plant to make the water content reach the standard before it can be exported for processing. Most oilfields in China have entered the period of medium-high water cut. In order to increase oil production and reduce water content, and achieve increased and stable crude oil production, pol...

Claims

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Application Information

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IPC IPC(8): C10G33/00
Inventor 付亚荣蔡远红田炜马永忠刘建华李冬青
Owner PETROCHINA CO LTD
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