Hydrophobically associating polymer for shale gas exploitation

A technology of shale gas exploitation and hydrophobic association, which is applied in the direction of drilling compositions, chemical instruments and methods, and can solve the problems of low resistance reduction rate of polymers

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is the low resistance reduction rate of polymers in the prior art. A hydrophobic association polymer for shale gas exploitation is provided. The hydrophobic association polymer has a high resistance reduction rate. The advantages

Method used

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  • Hydrophobically associating polymer for shale gas exploitation

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Comparison scheme
Effect test

Embodiment 1

[0038] 1. Polymer synthesis

[0039] First add 650g deionized water to the polymerization kettle, add 100g acrylamide (AM), 54g 2-acrylamido-2-methylpropanesulfonic acid (AMPS), 1.5g 2-acrylamidododecylsulfonic acid Sodium (NaAMC 12 S), stirred until completely dissolved, adjusted the pH value to 9 with NaOH, and began to pass high-purity nitrogen gas, and after 30 minutes, the temperature in the kettle was lowered to 15°C, and then 15.5g of 0.1wt% sodium bisulfite aqueous solution and 0.1wt% Potassium persulfate aqueous solution 15.5g is used as initiator, seals after continuing nitrogen gas 30min. After 1 hour, the reaction temperature was gradually raised to 45°C. After 3 hours of reaction, a hydrogel-like polymer product was obtained. After cutting the glue, it was blown and dried at 90°C for 1.5 hours, crushed and sieved with a pulverizer to obtain dry hydrophobic associative polymers.

[0040] 2. Preparation of drag reducer

[0041] In 10L of water, 1g of hydrophobic...

Embodiment 2

[0049] 1. Polymer synthesis

[0050] First add 650g deionized water to the reaction kettle, add 100g acrylamide (AM), 60g 2-acrylamido-2-methylpropanesulfonic acid (AMPS), 15g 2-acrylamido sodium dodecylsulfonate ( NaAMC 12 S), stirred until completely dissolved, adjusted the pH value to 9 with NaOH, and began to feed high-purity nitrogen gas, and after 30 minutes, the temperature in the kettle was lowered to 15°C, and then 17.5g of 0.1wt% sodium bisulfite aqueous solution was added successively And 17.5 g of aqueous potassium persulfate solution of 0.1wt% is used as initiator, and seals after continuing nitrogen gas 30min. After 1 hour, the reaction temperature was gradually increased to 45°C. After 3 hours of reaction, a gel-like polymer product was obtained. After cutting the gel, it was blown and dried at 90°C for 1.5 hours, crushed and sieved with a pulverizer to obtain a water-soluble hydrophobic association polymer things.

[0051] 2. Preparation of drag reducer

[...

Embodiment 3

[0057] 1. Polymer synthesis

[0058] First add 650g of deionized water to the reaction kettle, add 100g of acrylamide (AM), 55.5g of 2-acrylamido sodium dodecylsulfonate (NaAMC 12 S), stirred until it was completely dissolved, adjusted the pH value to 9 with NaOH, and started to feed high-purity nitrogen gas. After 30 minutes, the temperature in the kettle was lowered to 15°C, and then 10 g of 0.1wt% sodium bisulfite aqueous solution and 0 . 10g of 1wt% potassium persulfate aqueous solution is used as an initiator, and the seal is sealed after continuing to pass nitrogen gas for 30 minutes. After 1 hour, the reaction temperature was gradually raised to 45°C. After 3 hours of reaction, a gel-like polymer product was obtained. After cutting the gel, it was air-dried at 90°C for 1.5 hours, crushed and sieved with a pulverizer to obtain a hydrophobic association polymer.

[0059] 2. Preparation of drag reducer

[0060] In 10 L of water, 1 g of water-soluble hydrophobic associati...

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Abstract

The invention relates to a hydrophobically associating polymer for shale gas exploitation and a preparation method thereof and an application of the hydrophobically associating polymer as a drag reducer in shale gas exploitation and is mainly used for solving the problem of low drag reduction rate of the polymers in the prior art. The hydrophobically associating polymer for shale gas exploitation is prepared from the following mixtures in parts by mass through free radical polymerization: a) 100 parts of acrylamide; b) 0-60 parts of free radical polymerization anion monomer; c) 0.1-60 parts of free radical polymerization hydrophobic monomer; and d) 200-2,000 parts of water; and the technical problem is solved relatively well by the technical scheme, and the hydrophobically associating polymer can be used as a drag reducer in shale gas exploitation.

Description

technical field [0001] The invention relates to a hydrophobic association polymer used in shale gas exploitation, a preparation method thereof, and the application of the hydrophobic association polymer as a drag reducer in shale gas exploitation. Background technique [0002] With the increasing shortage of oil and gas resources and the increasingly prominent issue of energy security, shale gas resources have become a hot research topic in the world's energy circles. At present, the exploration and development of shale gas resources in China is still in the initial stage of exploration, and the development and protection of these resources is an important issue facing my country's energy industry. At present, hydraulic fracturing technology is usually used in the development of shale gas. Since the liquid displacement during shale gas fracturing is very large, it is necessary to add a certain amount of drag reducer such as hydroxypropyl guar gum, polyacrylamide, etc. Redu...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F220/58C08F220/06C08F212/14C08F228/02C08F226/02C09K8/68
Inventor 蔡红夏燕敏苏智青宋晓芳于志省
Owner CHINA PETROLEUM & CHEM CORP
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