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Novel polyacrylamide for oil displacement

A polyacrylamide and acrylamide technology, which is applied to drilling compositions, chemical instruments and methods, etc., can solve the problems of low displacement efficiency, high surface tension, low oil displacement efficiency, etc. The effect of low surface tension and high oil displacement efficiency

Inactive Publication Date: 2019-09-24
SHENGLI OIL FIELD FANGYUAN CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new type of polyacrylamide for oil displacement to solve the problem that the polyacrylamide obtained by the existing preparation process proposed in the above-mentioned background technology has a smaller molecular weight than other systems, a large surface tension, and low displacement efficiency. Smaller, less efficient oil displacement issues

Method used

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  • Novel polyacrylamide for oil displacement

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Effect test

Embodiment 1

[0022] see figure 1 , the present invention provides a technical solution of a novel polyacrylamide for oil displacement: a novel polyacrylamide for oil displacement, comprising the following steps:

[0023] Step 1: Add acrylamide, acrylic acid, and KH570 into a three-necked flask in proportion, and add distilled water as a solvent to prepare a mixed solution A;

[0024] Step 2: Cover and seal, stir evenly on an electromagnetic stirrer, place in a water bath at constant temperature, adjust the pH value, and drop 0.5% of the monomer mass initiator into the bottle to prepare solution B;

[0025] Step 3: standing for reaction to obtain the required solution, and cooling it;

[0026] Step 4: Transfer the reaction mixture to a beaker, add ethanol to soak, and at the same time cut the reaction mixture to the size of a grain of rice with scissors, and replace the ethanol in due course until the polymer completely becomes a hard white granular solid;

[0027] Step 5: Transfer the wh...

Embodiment 2

[0036] see figure 1 , the present invention provides a technical solution of a novel polyacrylamide for oil displacement: a novel polyacrylamide for oil displacement, comprising the following steps:

[0037] Step 1: Add acrylamide, acrylic acid, and KH570 into a three-necked flask in proportion, and add distilled water as a solvent to prepare a mixed solution A;

[0038] Step 2: Cover and seal, stir evenly on an electromagnetic stirrer, place in a water bath at constant temperature, adjust the pH value, and drop 0.5% of the monomer mass initiator into the bottle to prepare solution B;

[0039] Step 3: standing for reaction to obtain the required solution, and cooling it;

[0040] Step 4: Transfer the reaction mixture to a beaker, add ethanol to soak, and at the same time cut the reaction mixture to the size of a grain of rice with scissors, and replace the ethanol in due course until the polymer completely becomes a hard white granular solid;

[0041] Step 5: Transfer the wh...

Embodiment 3

[0050] see figure 1 , the present invention provides a technical solution of a novel polyacrylamide for oil displacement: a novel polyacrylamide for oil displacement, comprising the following steps:

[0051] Step 1: Add acrylamide, acrylic acid, and KH570 into a three-necked flask in proportion, and add distilled water as a solvent to prepare a mixed solution A;

[0052] Step 2: Cover and seal, stir evenly on an electromagnetic stirrer, place in a water bath at constant temperature, adjust the pH value, and drop 0.5% of the monomer mass initiator into the bottle to prepare solution B;

[0053] Step 3: standing for reaction to obtain the required solution, and cooling it;

[0054] Step 4: Transfer the reaction mixture to a beaker, add ethanol to soak, and cut the reaction mixture to the size of a grain of rice with scissors, and replace the ethanol in due course until the polymer completely becomes a hard white granular solid;

[0055] Step 5: Transfer the white granular poly...

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Abstract

The invention discloses novel polyacrylamide for oil displacement. The product is obtained after mixing, capping sealing, addition of an initiator, standing for a reaction, cooling treatment, addition of ethanol for soaking, shear molding and drying. According to the novel polyacrylamide for oil displacement, a mixed solution with the total monomer concentration of 4% is prepared with AM (acrylamide), KH570 and AA (acrylic acid) as raw materials according to the reaction proportion of 7:0.4:2, with potassium persulfate the mass of which is 0.5% of the total monomer mass as an initiator, a polyacrylamide oil displacement agent is synthesized under the environment with the pH value of 7-8, and the macromolecular polyacrylamide is obtained; the molecular weight of the polyacrylamide is larger than that of other systems, the surface tension is small, the displacement efficiency is high, and the oil displacement efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of polyacrylamide preparation, and in particular relates to a novel polyacrylamide for oil displacement. Background technique [0002] Polyacrylamide (PAM) is a linear polymer, and its products are mainly divided into two forms: dry powder and colloid. According to its average molecular weight, it can be divided into three categories: low molecular weight (<1 million), medium molecular weight (2 million to 4 million) and high molecular weight (>7 million). According to its structure, it can be divided into non-ionic, anionic and cationic. The anionic type is mostly the hydrolysis of PAM (HPAM). The main chain of polyacrylamide has a large number of amide groups, which has high chemical activity and can be modified to produce many derivatives of polyacrylamide. The products have been widely used in papermaking, mineral processing, oil recovery, metallurgy, building materials, sewage treatment, etc. i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F230/08C09K8/588
CPCC08F220/56C09K8/588
Inventor 杨涛马乐瑶王飞关勇
Owner SHENGLI OIL FIELD FANGYUAN CHEM IND
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