Temperature-resistant clay anti-swelling agent for acidification in oil field and preparation method thereof

A technology of anti-swelling agent and clay, which is applied in the field of temperature-resistant clay anti-swelling agent for oil field acidification and its preparation, can solve the problems that clay anti-swelling agent is not suitable for high-temperature acidification environment, and achieve easy acquisition, transportation and storage, and temperature-resistant Good performance and high productivity

Active Publication Date: 2017-12-22
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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  • Temperature-resistant clay anti-swelling agent for acidification in oil field and preparation method thereof
  • Temperature-resistant clay anti-swelling agent for acidification in oil field and preparation method thereof
  • Temperature-resistant clay anti-swelling agent for acidification in oil field and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: clay antiswelling agent B 1 and its preparation method

[0025] (1) Clay anti-swelling agent B 1 The composition, components and molecular formula are as follows:

[0026] Clay anti-swelling agent B 1 The intermediate is formed by reacting 1 mol of 1,5-dihydroxynaphthalene with 0.9 mol of acrylic acid, and then reacted with 1.1 mol of aniline through amidation reaction. Its molecular formula is as follows:

[0027]

[0028] (2) Clay anti-swelling agent B 1 The preparation method is as follows:

[0029] ①In a three-necked flask equipped with nitrogen protection, reflux condenser and thermometer, add 1mol of 1,5-dihydroxynaphthalene and 0.9mol of acrylic acid, raise the temperature to 60°C, and then slowly add 640.68g of Sodium hydroxide, after the sodium hydroxide is completely added, heat up to 110°C at a rate of 5°C per minute, keep the stirring rate constant, react at a constant temperature for 5h, then turn off the heat source, cool down to room...

Embodiment 2

[0034] Embodiment 2: clay antiswelling agent B 2 and its preparation method

[0035] (1) Clay anti-swelling agent B 2 The composition, components and molecular formula are as follows:

[0036] Clay anti-swelling agent B 2 The intermediate is formed by reacting 1 mol of 1,5-dihydroxynaphthalene with 1.2 mol of acrylic acid, and then reacted with 1.2 mol of aniline through amidation reaction. Its molecular formula is as follows:

[0037]

[0038] (2) Clay anti-swelling agent B 2 The preparation method is as follows:

[0039] ①In a three-necked flask equipped with nitrogen protection, reflux condenser and thermometer, add 1mol of 1,5-dihydroxynaphthalene and 1.2mol of acrylic acid, raise the temperature to 65°C, and slowly add 700.56g of Sodium hydroxide, after the sodium hydroxide is completely added, heat up to 120°C at a rate of 8°C per minute, keep the stirring rate constant, react at a constant temperature for 6h, then turn off the heat source, cool down to room temp...

Embodiment 3

[0043] Embodiment 3: clay antiswelling agent B 3 and its preparation method

[0044] (1) Clay anti-swelling agent B 3 The composition, components and molecular formula are as follows:

[0045] Clay anti-swelling agent B 3 The intermediate is formed by reacting 1 mol of 1,5-dihydroxynaphthalene with 1.5 mol of acrylic acid, and then reacted with 1.2 mol of aniline through amidation reaction. Its molecular formula is as follows:

[0046]

[0047] (2) Clay anti-swelling agent B 3 The preparation method is as follows:

[0048] ①In a three-necked flask equipped with nitrogen protection, reflux condenser and thermometer, add 1mol of 1,5-dihydroxynaphthalene and 1.5mol of acrylic acid, raise the temperature to 70°C, and slowly add 752.35g of Sodium hydroxide, after the sodium hydroxide is completely added, heat up to 135°C at a rate of 12°C per minute, keep the stirring rate constant, react at a constant temperature for 8h, then turn off the heat source, cool down to room tempe...

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Abstract

The invention relates to the technical field of oil field development, and particularly relates to a temperature-resistant clay anti-swelling agent for acidification in an oil field. The clay anti-swelling agent is prepared by carrying out reaction on 1,5-dihydroxynaphthalene and an acrylic acid to generate an intermediate; then carrying out reaction on the intermediate and aniline through amidation reaction to prepare the clay anti-swelling agent, wherein the molar ratio of 1,5-dihydroxynaphthalene to the acrylic acid to the aniline is 1:(0.9 to 1.8):(1.1 to 1.4), preferably 1:1.2:1.2. The clay anti-swelling agent is characterized in that the anti-swelling agent has the advantages of simple preparation process, low cost, strong adaptability, strong stability, high temperature resistance and anti-swelling effect; the highest temperature resistance is up to 180 DEG C, and the anti-swelling ratio is up to 95 percent or above. Therefore, the temperature-resistant clay anti-swelling agent can be widely applied to a clay anti-swelling technique for acidification in the oil field.

Description

technical field [0001] The invention relates to the technical field of oilfield development, in particular to a temperature-resistant clay antiswelling agent for oilfield acidification and a preparation method thereof. Background technique [0002] The clay will swell during the acidizing process of the oil field, and adding anti-swelling agent for acidizing clay can inhibit its swelling. When the acid flow passes through the clay minerals, the cement in the minerals will be dissolved, causing the clay minerals to disperse and expand faster. Swelling of clay can lead to clogged pores as clay particles and other debris are deposited in the fracture bends due to swelling, reducing permeability. [0003] In 1969, Carl D. first proposed that cations with multiple charges were used as clay anti-swelling agents. In 1971, Young first studied the anti-swelling properties of organic silicon. Silicone can effectively solidify sandstone formations, inhibit sandstone loosening, and pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/78C07C229/18C07C227/08C07C67/08C07C69/54
CPCC07C67/08C07C227/08C07C229/18C09K8/78C07C69/54
Inventor 张玉真曹光华
Owner HENAN TIANXIANG NEW MATERIALS
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