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Oil-soluble demulsifier for oil field, and preparation method thereof

An oil-soluble, demulsifier technology, applied in the field of oil-soluble demulsifiers and their preparation, can solve the problems of complex components of demulsifiers, significant non-environmental protection performance, low safety, etc., to achieve increased dissolution and dispersion performance, obvious demulsification effect, The effect of improving diffusivity

Inactive Publication Date: 2021-05-04
DAQING PETROLEUM ADMINISTRATION +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides an oil-soluble demulsifier for oil fields, which solves the problem of poor dispersion of existing demulsifiers in production fluids with complex components, high degree of oil-water emulsification, and strong emulsification stability, resulting in slow oil-water separation speed and The problem of incomplete separation; low flash point, flammable and explosive during transportation, storage and use in summer, and low safety; high freezing point, problem that it cannot be used normally in severe cold winter; high toxicity, non-environmental protection performance significant problem

Method used

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  • Oil-soluble demulsifier for oil field, and preparation method thereof
  • Oil-soluble demulsifier for oil field, and preparation method thereof
  • Oil-soluble demulsifier for oil field, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0024] The oil-soluble demulsifier of this embodiment is composed of the following components according to the mass percentage: polyoxyethylene polyoxypropylene stearyl ether 15%, polyoxyethylene polyoxypropylene polyether 20%, PODE 3 30%, PODE 4 35%.

[0025] Preparation method: According to the proportion of the above components, the solvent PODE 3 and PODE 4 Add and blend into the blending tank, and then blend polyoxyethylene polyoxypropylene stearyl ether and polyoxyethylene polyoxypropylene polyether into the same blending tank. Mix and stir at normal temperature and pressure for 30 minutes to obtain demulsifier A.

Embodiment 2

[0027] The oil-soluble demulsifier of this embodiment is composed of the following components according to the mass percentage: polyoxyethylene polyoxypropylene stearyl ether 15%, polyoxyethylene polyoxypropylene polyether 15%, PODE 3 35%, PODE 4 35%.

[0028] The preparation method is the same as in Example 1 to obtain demulsifier B.

Embodiment 3

[0030] The oil-soluble demulsifier of this embodiment is composed of the following components according to the mass percentage: polyoxyethylene polyoxypropylene stearyl ether 15%, polyoxyethylene polyoxypropylene polyether 10%, PODE 3 40%, PODE 4 35%.

[0031] The preparation method is the same as in Example 1 to obtain demulsifier C.

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Abstract

The invention discloses an oil-soluble demulsifier for an oil field, and a preparation method thereof. The oil-soluble demulsifier comprises a solvent, and the solvent is polyformaldehyde dimethyl ether with the polymerization degree of 3 and / or polyformaldehyde dimethyl ether with the polymerization degree of 4. The problems of low oil-water separation speed and incomplete separation caused by poor dispersion performance of an existing demulsifier in produced liquid with complex components, high oil-water emulsification degree and high emulsification stability are solved. The problems of low flash point, flammable and explosive properties in transportation, storage and use processes in summer, and low safety are solved. The problems that the freezing point is high, and normal use cannot be achieved in severe cold winter are solved.

Description

technical field [0001] The invention relates to an oilfield additive, in particular to an oil-soluble demulsifier and a preparation method thereof. Background technique [0002] In oilfields, conventional oil-soluble demulsifiers are composed of dry agents and solvents. With the continuous update and change of oilfield production technology, the composition of produced fluid is more complex, the degree of oil-water emulsification is high, and the emulsification stability is enhanced, which has caused great difficulties for its dehydration. , so that the current conventional demulsifiers have poor dispersion performance in the production fluid, resulting in slow and incomplete separation of oil and water, and there are a large number of emulsified layers. In this case, in order to meet the production requirements, the demulsifier concentration and demulsification temperature can only be greatly increased, otherwise the dehydration speed, oil content in dewatered sewage, water...

Claims

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Application Information

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IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 郑伟付红英李连客单大龙吴虹范雪蕾张唯
Owner DAQING PETROLEUM ADMINISTRATION
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