Method for treating ageing oil of viscous oil

A treatment method and technology for aged oil, which is applied in the treatment of heavy oil and aged oil, and in the field of aged oil treatment, can solve problems such as unstable operation of crude oil dehydration system, no reference for heavy oil and aged oil, and non-negligible environmental management risks, etc., to achieve Improve the effective storage capacity, avoid the risk of oil loss, and have significant economic and social benefits

Active Publication Date: 2013-10-16
PETROCHINA CO LTD +1
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] 1. The aging oil is directly mixed into the crude oil export system, but it will bring the side effect of excessive water content in the crude oil export, which will affect the quality of crude oil products;
[0005] 2. Adding aging oil to the crude oil dehydration system will lead to unstable operation of the crude oil dehydration system and affect the dehydration effect;
[0006] 3. Directly treat the waste at the bottom of the tank, but it will cause a large loss of crude oil, and cannot be sold as qualified commercial oil. The economic benefit is low, and the potential environmental protection management risks cannot be ignored.
However, the technical scheme disclosed in this patent application has no reference for the treatment of heavy oil aging oil

Method used

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  • Method for treating ageing oil of viscous oil

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Embodiment 1 aging oil demulsifier

[0052] The present embodiment provides a demulsifier for aging oil, which has the following composition:

[0053] Phenol, 0.8%, Styrene, 2.0%, Polyethylene Polyamine, 0.6%, Formaldehyde, 0.8%, Catalyst, 0.75%, Ethylene Oxide, 45.05%, Propylene Oxide, 50%.

[0054] The aging oil demulsifier is prepared according to the following steps:

[0055] Add phenol, styrene, polyethylene polyamine and formaldehyde into the reaction kettle and mix at 120-140°C to obtain the initiator;

[0056] Add the catalyst to the reactor, vacuumize and control the pressure in the reactor below 0.4MPa, slowly add ethylene oxide and propylene oxide at 120-140°C, and react to negative pressure to obtain the aged oil Demulsifier.

[0057] The above-mentioned aged oil demulsifier provided in this example is especially suitable for the demulsification treatment of heavy oil aged oil.

Embodiment 2 3

[0058] Embodiment 2 three-phase decanter centrifuge

[0059] This embodiment provides a three-phase decanter centrifuge, which includes a differential, a screw propeller 1, a drum 2, a casing, a machine base, a motor and a feed pipe 3, wherein,

[0060] The casing (not shown in the figure) is fixed on the machine base (not shown in the figure), and the setting method of the casing and the machine base can be carried out according to the setting method of the existing centrifuge. The drum 2 is arranged in the casing, and the rotary drum 2 The two ends of the drum 2 are respectively a cylindrical area and a conical area;

[0061] The screw propeller 1 is arranged at the center position inside the drum 2, and a material pool 4 is formed between the inner wall of the drum 2 and the screw propeller 1, and the material pool 4 is provided with an oil outlet at one end of the cylindrical area of ​​the drum 2. The oil outlet 5 and the water outlet 6, the oil outlet 5 is close to the s...

Embodiment 3

[0066] Embodiment 3 aging oil treatment method

[0067] This embodiment provides a method for treating aged oil. The method for treating aged oil is a method for treating aged oil in the cold-combined station of Liaohe Oilfield, and the existing aging oil treatment equipment in the oilfield can be used.

[0068] The method includes the following steps:

[0069] The 20°C ground degassed viscosity of the heavy oil aged oil in the Lengyi joint station is about 80000-150000 cp, and the Lengyi combined heavy oil aged oil (with about 50% water content) is heated to 90-95°C with a heating furnace;

[0070] Add the aged oil demulsifier provided in Example 1 to the heated heavy oil aged oil through a dosing pump, based on the total weight of the thick oil aged oil, the amount of the demulsifier added is 600mg / kg;

[0071] Transport the aged oil of heavy oil with added demulsifier to the buffer settling tank of aged oil, and keep it warm for about 8 hours;

[0072] The heavy oil aged ...

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Abstract

The invention relates to a method for treating ageing oil of viscous oil, which provides a demulsifier for ageing oil of viscous oil, comprising the following raw materials in weight percent: 0.5-1% phenol, 1.5-2% styrene, 0.5-1% ethyleneamine, 0.5-1% formaldehyde, 0.5-1% catalyst, 40-50% ethylene oxide and 40-50% epoxypropane. The invention further provides a three-phase decanter centrifuger, comprising a differential mechanism, a spiral propeller, a rotary drum, a housing, an engine base, a motor and a feed pipe. The invention further provides a method for treating ageing oil of viscous oil, comprising the following steps of: using the demulsifier to perform demulsification treatment to the ageing oil of the viscous oil, then inputting the ageing oil of the viscous oil after the demulsification treatment in the three-phase decanter centrifuger to centrifuging and separating so as to respectively obtain fatlute, sewage and the oil. The ageing oil, especially the ageing oil of the viscous oil, is treated by adopting the demulsifier to combine with the centrifuging method; the demulsification and dehydration problem of the ageing oil of viscous oil in the oil field is solved, and the requirement of the field production can be satisfied.

Description

technical field [0001] The invention relates to a treatment method for aging oil, in particular to a treatment method for heavy oil and aging oil, and belongs to the field of petroleum exploration and development. Background technique [0002] Aging oil usually contains 40-60% crude oil, 60-40% water, 2-3% mud or slag, 0.5% acid, alkali or salt and surfactant. It is a very stable emulsified oil system. The collection and transportation dehydration method is difficult to handle. [0003] The problem of aging oil is common in all oil fields in the world, and the aging oil of heavy oil is a worldwide problem. The oil field gathering and transportation industry generally uses the following three methods to deal with aging oil: [0004] 1. The aging oil is directly mixed into the crude oil export system, but it will bring the side effect of excessive water content in the crude oil export, which will affect the quality of crude oil products; [0005] 2. Adding aging oil to the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G33/04C10G31/10C10G53/02B04B1/20
Inventor 袁鹏郑猛王浩谢加才张群冉杰梁凌熏刘晶晶龙华张琳王炜洪斌张玉涛
Owner PETROCHINA CO LTD
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