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Clay anti-swelling agent for high temperature oilfield acidification

An anti-swelling agent, oilfield technology, applied in the directions of organic chemistry, chemical instruments and methods, cyanide reaction preparation, etc., can solve the problem of clay anti-swelling agent not suitable for high temperature acidification environment, etc., and achieve easy acquisition, transportation, storage, and synthesis technology. Simple, avoids the effect of coalescence

Active Publication Date: 2018-01-26
HENAN TIANXIANG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the clay antiswelling agent of this invention is not suitable for high temperature acidification environment

Method used

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  • Clay anti-swelling agent for high temperature oilfield acidification
  • Clay anti-swelling agent for high temperature oilfield acidification
  • Clay anti-swelling agent for high temperature oilfield acidification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: clay antiswelling agent A 1 and its preparation method

[0026] (1) Clay anti-swelling agent A 1 The composition, components and molecular formula are as follows:

[0027] Clay anti-swelling agent A 1 Naphthol acrylate is produced by reacting 1 mol of 1-naphthol with 0.9 mol of acrylic acid, followed by amidation reaction with 1.1 mol of aniline. Its molecular formula is as follows:

[0028]

[0029] (2) Clay anti-swelling agent A 1 The preparation method is as follows:

[0030] ①In a three-necked flask equipped with nitrogen protection, reflux condenser and thermometer, first add 1mol of 1-naphthol and 0.9mol of acrylic acid, heat up to 80°C, and then slowly add 288.34g of sodium hydroxide under the condition of a stirring rate of 200rpm , after the sodium hydroxide is completely added, raise the temperature to 120°C at a rate of 7°C per minute, keep the stirring rate constant, and react at a constant temperature for 2 hours, then turn off the he...

Embodiment 2

[0035] Embodiment 2: clay antiswelling agent A 2 and its preparation method

[0036] (1) Clay anti-swelling agent A 2 The composition, components and molecular formula are as follows:

[0037] Clay anti-swelling agent A 2 Naphthyl acrylate is produced by reacting 1 mol of 1-naphthol with 1.1 mol of acrylic acid, followed by amidation reaction with 1.2 mol of aniline. Its molecular formula is as follows:

[0038]

[0039] (2) Clay anti-swelling agent A 2 The preparation method is as follows:

[0040] ①In a three-necked flask equipped with nitrogen protection, reflux condenser and thermometer, first add 1mol of 1-naphthol and 1.1mol of acrylic acid, raise the temperature to 85°C, and then slowly add 360.43g of sodium hydroxide under the condition of a stirring rate of 320rpm , after the sodium hydroxide is completely added, raise the temperature to 130°C at a rate of 8°C per minute, keep the stirring rate constant, and react at a constant temperature for 5h, then turn o...

Embodiment 3

[0044] Embodiment 3: clay antiswelling agent A 3 and its preparation method

[0045] (1) Clay anti-swelling agent A 3 The composition, components and molecular formula are as follows:

[0046] Clay anti-swelling agent A 3 Naphthol acrylate is produced by reacting 1 mol of 1-naphthol with 1.5 mol of acrylic acid, followed by amidation reaction with 1.3 mol of aniline. Its molecular formula is as follows:

[0047]

[0048] (2) Clay anti-swelling agent A 3 The preparation method is as follows:

[0049] ①In a three-necked flask equipped with nitrogen protection, reflux condenser and thermometer, first add 1mol of 1-naphthol and 1.5mol of acrylic acid, heat up to 90°C, and then slowly add 432.51g of sodium hydroxide under the condition of stirring rate of 400rpm , after the sodium hydroxide is completely added, raise the temperature to 145°C at a rate of 10°C per minute, keep the stirring rate constant, and react at a constant temperature for 8 hours, then turn off the heat ...

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Abstract

The invention relates to the technical field of oilfield development, in particular to a clay anti-swelling agent for high temperature oilfield acidification. The clay anti-swelling agent is preparedby: reacting 1-naphthol with acrylic acid to generate naphtyl acrylate, and then carrying out amidation reaction with aniline, wherein 1-naphthol, acrylic acid and aniline are in a mole ratio of 1:0.9-1.5:1.1-1.3, preferably 1:1.1:1.2. The clay anti-swelling agent has the characteristics of simple preparation process, low cost, strong adaptability, strong stability, high yield, high temperature resistance and good anti-swelling effect, has yield of over 90%, can tolerate a highest temperature up to 210DEG C, and has anti-swelling rate up to 90% or more. Therefore, the clay anti-swelling agentprovided by the invention can be widely applied in clay anti-swelling process of oilfield acidification.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a clay antiswelling agent for high-temperature oilfield acidification. Background technique [0002] Clay anti-swelling agent for acidification refers to an additive that can inhibit clay expansion during acidification. The acidizing process of oilfield can increase clay swelling. First, when the acid flows through the clay minerals, it will dissolve the cement of the minerals, which intensifies the expansion and dispersion of the clay minerals. Secondly, the expansion of clay will cause pore blockage. Due to expansion, the dispersed and diluted clay particles and debris will migrate to the bend of the crack for deposition or bridging and bridging, which will further cause the reduction of pores and permeability; for non-expansion The acid can promote its decomposition, and the dispersed particles are easy to migrate with the fluid flow together with other particle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/78C07C229/18C07C227/16C07C227/10
Inventor 张玉真曹光华
Owner HENAN TIANXIANG NEW MATERIALS
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