Using method of sour crude oil emulsion breaker

A technology of demulsifier and compound demulsifier, which is applied in the direction of dehydration/demulsification by chemical methods, which can solve the problems of not being able to achieve the ideal demulsification effect and the large amount of demulsifier used, so as to achieve improved dehydration effect, low cost and high degree of dehydration high effect

Inactive Publication Date: 2016-08-31
CHENGDU GAOPU PETROLEUM ENG TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the existing demulsifier is used in a large amount, and there is still a problem that the ideal demulsification effect cannot be achieved, and a method for using an acidic crude oil demulsifier to solve the above problems is provided

Method used

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  • Using method of sour crude oil emulsion breaker
  • Using method of sour crude oil emulsion breaker
  • Using method of sour crude oil emulsion breaker

Examples

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Embodiment 1

[0022] A method for using an acidic crude oil demulsifier, comprising:

[0023] Step 1, prepare crude oil composite demulsifier, the crude oil composite demulsifier includes 48-52wt% polyoxyethylene polyoxypropylene block polyether, 0.8-1.2wt% sodium cetyl sulfonate, 5-8wt% D-terpene, 10-15% by weight of C2-C6 carboxylic acid, and the rest is water.

[0024] The concrete preparation steps of described crude oil composite demulsifier are:

[0025] Step 1.1, adding C2-C6 carboxylic acid to water, and then adding sodium cetylsulfonate under stirring conditions to obtain a mixed solution;

[0026] Step 1.2, heating the mixed solution to 30-50°C, adding polyoxyethylene polyoxypropylene block polyether to the mixed solution during the heating process;

[0027] In step 1.3, after mixing evenly and when the temperature reaches 30-50°C, add D-terpene and mix evenly to make a demulsifier.

[0028] Step 2, adding the crude oil composite demulsifier into the crude oil in an amount of 5...

Embodiment 2

[0031] The difference between this example and Example 1 is that the C2-C6 carboxylic acid in this example is citric acid.

Embodiment 3

[0033] The difference between this example and Example 1 is that the C2-C6 carboxylic acid in this example is glutaric acid and citric acid with a weight ratio of 1:2.

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PUM

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Abstract

The invention discloses a using method of a sour crude oil emulsion breaker. The problem that the ideal emulsion breaking effect cannot be achieved even when an existing emulsion breaker using amount is large is solved. The method comprises the steps that 1, a crude oil composite emulsion breaker is prepared, wherein the crude oil composite emulsion breaker is prepared from 48-52 wt% of polyoxyethylene polypropylene oxide block polyether, 0.8-1.2 wt% of sodium hexadecyl sulfonate, 5-8 wt% of d-Limonene, 10-15 wt% of C2-C6 carboxylic acid, and the balance water; 2, the crude oil composite emulsion breaker is added into crude oil according to the addition amount of 5-10 ppm. The method has the advantages of lowering the consumption amount and effectively improving the dehydration effect.

Description

technical field [0001] The invention relates to a method for using a demulsifier, in particular to a method for using an acidic crude oil demulsifier. Background technique [0002] At present, when crude oil is exploited in offshore oilfields and enters the later stage of exploitation, as the water content continues to increase, it becomes turbid like mud, and the clay content reaches about 5%. Because the clay has a small particle size and a large surface area, the adsorption capacity is very high. Strong, in the formation crude oil reservoir, with the stirring of the oil production pump during the production process, a layer of crude oil will be wrapped on the surface of the particles, and then a new emulsification system will be formed, which is called "oil mineral aggregate structure" (oil mineral aggregate structure). aggregates, OMA). When the emulsification system of this structure enters the crude oil processing system, the oil-water interface in the separators of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 周斌
Owner CHENGDU GAOPU PETROLEUM ENG TECH
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