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Chemical treatment of aging oil

A technology for chemical treatment and aged oil, applied in the direction of chemical dehydration/demulsification, etc., can solve the problem of sewage water quality deterioration exceeding the standard, and achieve the effect of solving dehydration difficulties and reducing pressure

Active Publication Date: 2011-12-28
LIAONING HUAFU ENVIRONMENTAL ENG
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Problems solved by technology

[0004] The purpose of the present invention is to provide a chemical treatment method for aging oil, the oil treated by this method can reach the export standard, reduce the pressure of oil field sewage treatment and gathering and transportation system, solve the problems of sewage water quality deterioration and exceeding the standard, reduce safety hazards and Environmental hazard with important environmental and social benefits

Method used

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Embodiment Construction

[0010] The aging oil chemical treatment method in the present invention is to mix the aging oil stored in the tank of the joint station in the oil field with the aging oil with a comprehensive water content of 40-50% produced every day, and raise the temperature of the mixed aging oil to 65°C, and send it to In the settling tank, add sodium carbonate and oxalic acid before the aging oil enters the settling tank, wherein the total amount of sodium carbonate and oxalic acid dosing is to enter three-thousandths (weight) of the aging oil total amount of the settling tank, add demulsifier simultaneously, The ratio between sodium carbonate and oxalic acid is 53 to 45 by weight, and sodium carbonate and oxalic acid react chemically in the settling tank: Na 2 CO 3 +H 2 C 2 o 4 =Na 2 C 2 o 2 +CO 2 ↑+H 2 O, the carbon dioxide gas produced can reduce the viscosity of the aged oil. This chemical reaction destroys the stable emulsification system in the aged oil, that is, destroys ...

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Abstract

The invention discloses a chemical treatment method for aging oil. The method specifically comprises the following steps: heating the aging oil to a temperature of 65 DEG C; adding the heated aging oil to a settling tank, and synchronously adding an emulsion breaker, sodium carbonate and oxalic acid to the settling tank, wherein the total weight of the sodium carbonate and the oxalic acid is 3 per mill of the weight of the aging oil, the odium carbonate reacts with the oxalic acid in the settling tank, the chemical equation of the reaction is as the following: Na2CO3+H2C2O4=Na2C2O2+CO2(gas)+H2O. According to the reaction, the stable emulsifying system is destroyed, such that the oil, the water and the impurities in the aging oil can be effectively separated, the mobility of the aging oil can be increased through the generated carbon dioxide. With the present invention, the aging oil having the water content of 40-50% can be dewatered into the aging oil having the water content less than 1.5%, such that the aging oil meets the transportation standard.

Description

technical field [0001] The invention relates to a chemical treatment method for aging oil. Background technique [0002] In the production process of the oil field, due to the needs of the oil recovery process, different types of chemical agents will be added at different stages, and the different chemical agents added will form an emulsified system with a very stable physical and chemical structure under mechanical action. The oil in the emulsification system is called aging oil. The treatment and utilization of aged oil has been a difficult problem in oil field production for many years. [0003] At present, aging oil in oilfields is mainly pretreated by means of sedimentation and filtration, and then recovered to the oil system and blended with a large amount of fresh crude oil, which is commonly referred to as the aging oil back-blending process. However, the existence of aging oil is harmful to the oil field: the oil-water transition layer is highly conductive, and th...

Claims

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Application Information

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IPC IPC(8): C10G33/04
Inventor 周宏
Owner LIAONING HUAFU ENVIRONMENTAL ENG
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