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Organic polybasic carboxylic acid and diverter acid applicable to high-temperature carbonate reservoir acidification and preparation method thereof

A carbonatite storage and polycarboxylic acid technology, which is applied in the preparation of organic compounds, chemical instruments and methods, and cyanide reaction preparation, can solve the problems of high cost, low operating temperature, and poor technical stability, and achieve low cost , easy to handle, easy to handle effects

Active Publication Date: 2014-07-02
四川安东油气工程技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has high cost and low service temperature, and some viscoelastic surfactants turn to acidification technology with poor stability

Method used

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  • Organic polybasic carboxylic acid and diverter acid applicable to high-temperature carbonate reservoir acidification and preparation method thereof
  • Organic polybasic carboxylic acid and diverter acid applicable to high-temperature carbonate reservoir acidification and preparation method thereof
  • Organic polybasic carboxylic acid and diverter acid applicable to high-temperature carbonate reservoir acidification and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]Organic multi-component diverting acid suitable for high-temperature carbonatite reservoir acidification, composed of the following components by mass percentage:

[0048]

[0049] The obtained steering acid of the present embodiment was subjected to a performance test at 120°C, and the results are shown in Table 1:

[0050] Table 1

[0051] serial number

project

result

Remark

1

Exterior

brown homogeneous liquid

2

PH value

2.5

3

Density (g / cm 3 )

1.21

4

Viscosity (mPa.S)

15.6

5

Carbonate dissolution rate, %

98.3

6

Corrosion rate (120°C)

13.6

[0052] 7

Steering viscosity (mPa.S)

420

170s -1

8

Retarding rate, %

92.3

[0053] The organic polycarboxylic acid of this embodiment adopts the organic

[0054] Polycarboxylic acid, specifically glutamic acid tetraacetic ...

Embodiment 2

[0075] Organic multi-component diverting acid suitable for high-temperature carbonatite reservoir acidification, composed of the following components by mass percentage:

[0076]

[0077] The obtained steering acid of the present embodiment was subjected to a performance test at 150°C, and the results are shown in Table 2:

[0078] Table 2

[0079] serial number

project

result

Remark

1

Exterior

brown homogeneous liquid

2

PH value

2.0

3

Density (g / cm 3 )

1.26

4

Viscosity (mPa.S)

18.7

5

Carbonate dissolution rate, %

98.8

6

Corrosion rate (120°C)

24.2

7

Steering viscosity (mPa.S)

450

170s -1

8

Retarding rate, %

94.6

[0080] The organic polycarboxylic acid in this embodiment is an organic polycarboxylic acid suitable for the acidification of high-temperature carbonatite reservoirs...

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Abstract

The invention discloses organic polybasic carboxylic acid and diverter acid applicable to high-temperature carbonate reservoir acidification and a preparation method thereof. The organic polybasic carboxylic acid is tetraacetic glutamate and has a chemical structural formula represented by a formula shown in a drawing. The organic polybasic carboxylic acid disclosed by the invention has the characteristics of high-temperature resistance and no generation of precipitates and residues.

Description

technical field [0001] The invention relates to an organic polycarboxylic acid and a diverting acid suitable for high-temperature carbonatite reservoir acidification and a preparation method thereof, belonging to the technical field of oilfield acidification, in particular to an acidification liquid and acidification used in the acidification of carbonatite reservoirs in the development process of oil and gas wells shunt technology. Background technique [0002] The acidizing treatment of carbonatite reservoirs in oilfields is mainly to decontaminate the well-entry zone and dredge new channels. However, due to the heterogeneity of carbonatite reservoirs, conventional acid liquids preferentially enter the less polluted high-permeability layers. The effect of acidizing treatment will not be achieved, even in homogeneous carbonatite reservoirs, each layer will react unevenly with acid liquid, making acidizing treatment of carbonatite reservoirs more difficult than sandstone. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C229/24C07C227/26C09K8/72
Inventor 徐太平方也王能成李栓王鹏付丽
Owner 四川安东油气工程技术服务有限公司
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