Compounding type oil field emulsion breaker preparation method

A demulsifier, oil field technology, applied in the direction of dehydration/demulsification by chemical methods, etc.

Inactive Publication Date: 2016-04-27
QINGDAO SEIICHI INTPROP SERVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the problems existing in the existing single polyether demulsifier, the purpose of the present invention is to provide a preparation method of compound oilfield demulsifier, which obtains a compound polyether with relative molecular weight distribution in different ranges. Type demulsifier, various polyethers with different molecular weights have special demulsification and dehydration effects for different substances in crude oil, with ideal dehydration effect and good broad spectrum

Method used

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Examples

Experimental program
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Effect test

example 1

[0015] Wherein the weight ratio is that the polyether M accounts for 44-83% of the total amount of the polyether M and ethylene oxide. Ethylene oxide accounts for 17-56% of the total amount of polyether M and ethylene oxide. The amount of the basic catalyst is 0.2-2%, based on the total amount of polyether M and ethylene oxide, and the basic catalyst is one of potassium hydroxide or sodium hydroxide.

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PUM

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Abstract

The present invention discloses a high-performance compounding type oil field emulsion breaker preparation method, which comprises: preparing polyether emulsion breakers with different molecular weights to obtain a polyether emulsion breaker A with a molecular weight of 300-500, a polyether emulsion breaker B with a molecular weight of 700-900, a high molecular weight polyether emulsion breaker C with a molecular weight of 1500-2000, a high molecular weight polyether emulsion breaker D with a molecular weight of 4000-5000, and a high molecular weight polyether emulsion breaker E with a molecular weight of 8000-10000; and compounding various polyether emulsion breakers with different molecular weights according to a certain ratio so as to prepare the high-performance emulsion breaker. According to the present invention, the prepared high-performance emulsion breaker can be used for emulsion breaking dewatering of the oil field crude oil, and has advantages of good broad spectrum and less consumption.

Description

technical field [0001] The invention relates to a demulsifier for oilfield crude oil dehydration treatment and a preparation method thereof, in particular to a preparation method of a composite oilfield demulsifier. Background technique [0002] Water is often mixed in the oil mining process, and the crude oil must be dehydrated before transportation to reduce transportation costs. The free water in crude oil is easy to separate and remove, while the removal of emulsified water in crude oil generally requires the addition of demulsifiers. At present, polyether demulsifiers are mainly used in China. The hydrogen compound is used as an initiator, and under the action of an alkali metal catalyst, it undergoes anionic ring-opening polymerization reaction with an oxyalkylene to prepare a polyoxyethylene polyoxypropylene ether demulsifier. The molecular weight of a single polyether demulsifier prepared by this process is within a certain narrow range, the dehydration effect of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C08G65/26
Inventor 徐聪
Owner QINGDAO SEIICHI INTPROP SERVICE CO LTD
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