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Drag reducer for fracturing shale gas and preparation method of drag reducer

A technology of drag reducer and air pressure, which is applied in the field of drag reducer for shale gas fracturing fluid and its preparation, and can solve the problems of low drag reduction rate of drag reducer

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

[0004] The patent with the publication number CN102977877A reports a preparation method of a drag reducing agent for shale gas. By introducing a functional monomer into a conventional polyacrylamide, the shear resistance of the drag reducing agent and the drag reduction rate are improved. It can reach 70%; the patents whose publication numbers are CN102516975, CN103045226A and CN103010488A all report the preparation method of slick water type drag reducer, but the drag reduction rate of this type of drag reducer is relatively low

Method used

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  • Drag reducer for fracturing shale gas and preparation method of drag reducer

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Experimental program
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Effect test

Embodiment 1

[0034] 1. Polymer synthesis

[0035] 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 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 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 water-containing gel-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.

[0036] 2. Preparation of drag reducer

[0037] In 10L of water, ...

Embodiment 2

[0045] 1. Polymer synthesis

[0046] 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.

[0047] 2. Preparation of drag reducer

[...

Embodiment 3

[0053] 1. Polymer synthesis

[0054] 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 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 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.

[0055] 2. Preparation of drag reducer

[0056] In 10L of water, add 1g of water-soluble hydrophobic association polymer, 18g of OP20 and 100g of KCl, a...

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Abstract

The invention relates to a drag reducer for fracturing shale gas and a preparation method of the drag reducer and mainly aims at solving the problem that resistance-reducing ratio of the drag reducer is low in the prior art. The drag reducer for fracturing the shale gas comprises the following components in parts by mass: 1 part of hydrophobic associated polymers, 0.05-20 parts of a surfactant, 5-200 parts of KCl and 500-20000 parts of water. By adopting the technical scheme, the technical problem is well solved, and the drag reducer for fracturing the shale gas can be applied to exploitation of the shale gas.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas exploitation, in particular to a drag reducer for shale gas fracturing fluid and a preparation method thereof. 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. Reduce the friction of liquid in the pipeline and impro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68C08F220/56C08F220/58C08F220/06C08F212/14C08F226/02
Inventor 蔡红夏燕敏苏智青于志省宋晓芳
Owner CHINA PETROLEUM & CHEM CORP
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