阅读说明：本技术 一种二元复合驱采出液用破乳剂的制备方法 (Preparation method of demulsifier for binary composite flooding produced liquid ) 是由 何世全 黄连华 李霞 邓焱伟 马超 刘丹丹 周毓江 李�荣 熊建军 王小亮 于 2020-06-29 设计创作，主要内容包括：本发明提供所述二元复合驱采出液用破乳剂的制备方法,包括如下步骤：步骤1、将1份聚环氧乙烷聚环氧丙烷单丁基醚与1份丙烯酸放入反应釜中加热至120℃～130℃,在催化剂的作用下进行酯化反应,生成丙烯酸酯；步骤2、将经由步骤1所获得的丙烯酸酯1份和X份丙烯酰胺、Y份2-丙烯酰胺-2-甲基丙磺酸、Z份二甲基二烯丙基氯化铵放入反应釜中,在过氧化物的作用下进行四元共聚反应,得到二元复合驱采出液用两性高分子聚合物破乳剂。本发明制备方法具有简单、配制方便、快速高效和成本低廉的特点。(The invention provides a preparation method of a demulsifier for a binary composite flooding produced liquid, which comprises the following steps: step 1, putting 1 part of polyethylene oxide polypropylene oxide monobutyl ether and 1 part of acrylic acid into a reaction kettle, heating to 120-130 ℃, and carrying out esterification reaction under the action of a catalyst to generate acrylic ester; and 2, putting 1 part of the acrylic ester obtained in the step 1, X parts of acrylamide, Y parts of 2-acrylamide-2-methylpropanesulfonic acid and Z parts of dimethyl diallyl ammonium chloride into a reaction kettle, and performing quaternary copolymerization reaction under the action of peroxide to obtain the amphoteric high-molecular polymer demulsifier for the binary composite flooding produced liquid. The preparation method has the characteristics of simplicity, convenience in preparation, rapidness, high efficiency and low cost.)

1. A preparation method of a demulsifier for a binary compound flooding produced liquid is characterized by comprising the following steps: the structural general formula of the demulsifier for the binary compound flooding produced liquid is as follows:

the preparation method of the demulsifier for the binary compound flooding produced liquid comprises the following steps:

step 1, putting 1 part of polyethylene oxide polypropylene oxide monobutyl ether and 1 part of acrylic acid into a reaction kettle, heating to 120-130 ℃, and carrying out esterification reaction under the action of a catalyst to generate acrylic ester;

and 2, putting 1 part of the acrylic ester obtained in the step 1, X parts of acrylamide, Y parts of 2-acrylamide-2-methylpropanesulfonic acid and Z parts of dimethyl diallyl ammonium chloride into a reaction kettle, and performing quaternary copolymerization reaction under the action of peroxide to obtain the amphoteric high-molecular polymer demulsifier for the binary composite flooding produced liquid.

2. The preparation method of the demulsifier for the binary complex flooding produced fluid, according to claim 1, is characterized in that: the parts in the steps 1 to 2 are all molar parts.

3. The preparation method of the demulsifier for the binary complex flooding produced fluid, according to claim 1, is characterized in that: x, Y, Z in the step 2 have no mutual limiting relation, and the value range is 1-10.

Technical Field

The invention belongs to the technical field of oil field chemicals, and particularly relates to a preparation method of a demulsifier for a binary compound flooding produced liquid.

Background

Most of oil field exploitation in China enters the middle and later stages, the produced liquid has high water content, and the original oil extraction process cannot meet the requirements of oil field exploitation. Tertiary oil recovery technologies such as polymer flooding/surfactant binary combination flooding and the like have become main means for improving the recovery ratio of crude oil, but the oil-water separation of produced liquid is difficult, and the normal production of an oil field is seriously influenced.

At present, the demulsifier widely used in oil fields in China is a demulsifier mainly containing polyether, and different polyether demulsifiers are obtained through different initiators, propylene oxide and ethylene oxide with different addition numbers and proportions and different modifiers. However, the existing polyether demulsifiers have many problems in the demulsification application of binary complex flooding produced fluid: low dehydration rate, large dosage, weak hydrophilic ability, poor wetting property and infiltration effect, and long time for reaching an oil-water interface. Therefore, modification treatment of the existing polyether demulsifiers is required.

Disclosure of Invention

Aiming at the problems in the prior art, the technical scheme adopted by the invention for solving the problems in the prior art is as follows:

a preparation method of a demulsifier for a binary compound flooding produced liquid is characterized by comprising the following steps: the structural general formula of the demulsifier for the binary compound flooding produced liquid is as follows:

the preparation method of the demulsifier for the binary compound flooding produced liquid comprises the following steps:

step 1, putting 1 part of polyethylene oxide polypropylene oxide monobutyl ether and 1 part of acrylic acid into a reaction kettle, heating to 120-130 ℃, and carrying out esterification reaction under the action of a catalyst to generate acrylic ester;

and 2, putting 1 part of the acrylic ester obtained in the step 1, X parts of acrylamide, Y parts of 2-acrylamide-2-methylpropanesulfonic acid and Z parts of dimethyl diallyl ammonium chloride into a reaction kettle, and performing quaternary copolymerization reaction under the action of peroxide to obtain the amphoteric high-molecular polymer demulsifier for the binary composite flooding produced liquid.

The parts in the steps 1 to 2 are all molar parts.

X, Y, Z in the step 2 have no mutual limiting relation, and the value range is 1-10.

The invention has the following advantages:

the preparation method provided by the invention has the characteristics of simplicity, convenience in preparation, rapidness, high efficiency and low cost, and the demulsifier for the binary composite flooding produced liquid prepared by the method contains anionic groups and cationic groups, contains nonionic ethylene oxide-propylene oxide chains, has higher molecular weight, can reach an oil-water interface more quickly, and improves the efficiency and the efficiency of reducing the surface tension; meanwhile, the amounts of acrylamide, 2-acrylamide-2-methylpropanesulfonic acid and dimethyldiallylammonium chloride can be flexibly adjusted according to needs, so that the demulsifier for the binary composite flooding produced liquid with different molecular weights and different cationic, anionic and nonionic distributions is obtained.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments:

a preparation method of a demulsifier for a binary compound flooding produced liquid comprises the following steps:

(1) putting 1 part of polyethylene oxide polypropylene oxide monobutyl ether and 1 part of acrylic acid into a reaction kettle, heating to 120-130 ℃, and carrying out esterification reaction under the action of a catalyst to generate acrylic ester;

(2) and (2) putting 1 part of the acrylic ester obtained in the step (1), X parts of acrylamide, Y parts of 2-acrylamide-2-methylpropanesulfonic acid and Z parts of dimethyl diallyl ammonium chloride into a reaction kettle, and carrying out quaternary copolymerization reaction under the action of peroxide to obtain the amphoteric high-molecular polymer demulsifier.

The above process involves the following reaction scheme:

several specific examples are given below: