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Low temperature dehydration process of thick oil

A low-temperature dehydration and heavy oil technology, applied in the direction of dehydration/emulsification by chemical methods, can solve problems such as waste of energy

Active Publication Date: 2011-07-20
LIAONING HUAFU PETROLEUM HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that dehydration not only requires chemical agents (demulsifiers), which wastes energy, but also requires a temperature that matches the agent to ensure that the water content of the exported crude oil meets the standard

Method used

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Embodiment Construction

[0012] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0013] The low-temperature dehydration process of heavy oil in the present invention is to produce 12000-14000m of heavy oil with a comprehensive water content of 82-83% and a temperature of 60-65°C every day. 3 Send directly to the settling tank, and add dehydrating agent before the crude oil of heavy oil enters the settling tank: ammonium chloride and sodium nitrite. Three-thirds (weight), add demulsifier at the same time, the ratio between ammonium chloride and sodium nitrite is 1 to 1 by weight, ammonium chloride and sodium nitrite react chemically in the settling tank: NH4Cl+NaNO2=NaCl +N2↑+H2O, a large amount of nitrogen and heat are generated, among which, the heat is used to raise and maintain the temperature of the heavy oil in the settling tank, so that the temperature of the heavy oil is kept between 57 and 62°C, and the large amo...

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Abstract

The invention discloses a low temperature dehydration process of thick oil. Crude thick oil is introduced into a settling tank, a demulsifier is added, and ammonium chloride and sodium nitrite of which the total weight is three thousandths based on the crude oil are added simultaneously; the ammonium chloride and the sodium nitrite are subjected to chemical reaction in the settling tank to generate nitrogen which can allow the thick oil to be spongy so as to be easy to dehydrate, and heat which can allow the thick oil to be thermostatic simultaneously; the spongy thick oil is dehydrated and separated in the settling tank; and the dehydrated crude oil which meets the standard is output from the settling tank, heated and externally output. The low temperature dehydration process has the effects of energy saving and emission reduction.

Description

technical field [0001] The invention relates to a low-temperature dehydration process for heavy oil. Background technique [0002] The heavy oil produced in Liaohe Oilfield is more than 5 million tons. This kind of heavy oil (including extra heavy oil and super heavy oil) has poor physical properties, high viscosity, high content of colloidal asphalt, and difficult dehydration. The crude oil temperature of heavy oil is between 60 and 65°C. At present, the dehydration treatment process of heavy oil in Liaohe Oilfield is as follows: firstly, the heavy oil enters the combined station for heating, so that the temperature reaches above 72°C, then adds demulsifier, and puts it in the settling tank After settling for 70-80 hours, the water content of the original heavy oil is lower than 5%, and the output is heated to about 80°C, and then the second stage of dehydration is carried out in the second settling tank, so that the water content of the heavy oil is lower than 1.5%, and fi...

Claims

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Application Information

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IPC IPC(8): C10G33/04
Inventor 周宏张德生朱成林
Owner LIAONING HUAFU PETROLEUM HIGH TECH
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