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Viscous oil emulsion preparation method and viscous oil conveying method

An oil-in-water emulsion, emulsion technology, applied in mixing methods, chemical instruments and methods, emulsification and other directions, can solve problems such as easy demulsification, emulsion instability, pipeline blockage, etc., to extend stability and meet long-distance The effect of conveying and preventing deformation

Active Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the emulsion formed by this method is unstable and easy to break, and oil-water separation is prone to lead to pipeline blockage during transportation.

Method used

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  • Viscous oil emulsion preparation method and viscous oil conveying method
  • Viscous oil emulsion preparation method and viscous oil conveying method
  • Viscous oil emulsion preparation method and viscous oil conveying method

Examples

Experimental program
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Effect test

preparation example Construction

[0024] According to the method for preparing a thick oil emulsion of the present invention, the thick oil can be mixed with an emulsifier, a stabilizer and water by a conventional method, and the thick oil can be formed into droplets and dispersed in water, for example, in a mixer with a shearing function. Or in a static mixer, thick oil is mixed with emulsifiers, stabilizers and water to form an oil-in-water emulsion.

[0025] The method for preparing a thick oil emulsion according to the present invention includes step (2): cooling the oil-in-water emulsion to a second temperature, and the viscosity of the thick oil at the second temperature is not less than 2000mPa·s .

[0026] From the perspective of further improving the stability of the oil-in-water emulsion, the viscosity of the heavy oil at the second temperature is preferably in the range of 20,000-2,000,000 mPa·s. When the heavy oil is heavy oil with relatively high wax content, the viscosity of the heavy oil at the...

Embodiment 1

[0038] Yaoyingtai heavy oil-1 is used in this embodiment, and its properties are listed in Table 1.

[0039] Table 1

[0040] Asphaltenes / wt%

0.4

Colloid / weight%

17.9

Wax content / wt%

20.7

[0041] Under the first temperature, Yaoyingtai thick oil-1 and emulsifier (nonylphenol polyoxyethylene ether (polymerization degree 15), referred to as NP-15), stabilizer (polyacrylamide, number average molecular weight is 5,000,000 , referred to as PAM) and water to form an oil-in-water emulsion. The formed oil-in-water emulsion is cooled to the second temperature, and the stable existence time of the oil-in-water emulsion at the second temperature is measured.

[0042] The experimental conditions and results are listed in Table 2.

Embodiment 2

[0044] The oil-in-water emulsion was prepared by the same method as in Example 1, except that the ratio between the emulsifier and the stabilizer was changed. The experimental conditions and results are listed in Table 2.

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Abstract

The present invention discloses a viscous oil emulsion preparation method comprising mixing of viscous oil, an emulsifier, a stabilizer and water at first temperature to form an oil-in-water emulsion and cooling of the oil-in-water emulsion to second temperature, wherein the viscosity of the viscous oil at the first temperature is not more than 500mPa.s, and the viscosity of the viscous oil at the second temperature is not less than 2000mPa.s. The present invention also discloses a viscous oil conveying method, and the method includes preparation of the viscous oil into the oil-in-water emulsion by the viscous oil emulsion preparation method and conveying of the oil-in-water emulsion at the second temperature. The viscous oil emulsion prepared by the viscous oil emulsion preparation method has good stability, and can meet the requirements of long-distance transport.

Description

technical field [0001] The invention relates to a method for preparing thick oil emulsion, and also relates to a method for transporting heavy oil. Background technique [0002] Heavy oil has high viscosity and poor fluidity, so it is usually transported by pipeline heat tracing. However, heat-tracing transportation needs to heat the heavy oil to a higher temperature, which has problems such as high energy consumption and high operating costs. [0003] Compared with heat-tracing transportation, emulsification transportation is a more economical and effective heavy oil transportation method. Emulsion delivery is a method of mixing surfactants and water with heavy oil to form a low-viscosity oil-in-water emulsion, and then deliver it. [0004] CN1451903 discloses a method for gathering and transporting crude oil at normal temperature. The method first adds a flow improver to the production fluid, wherein the flow improver is a polyether ethylene oxide and propylene oxide emb...

Claims

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Application Information

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IPC IPC(8): B01F3/10F17D1/17B01F23/47
Inventor 罗咏涛秦冰
Owner CHINA PETROLEUM & CHEM CORP
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