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Low carbon organic composite acid deblocking agent and its preparation method

A technology of plugging remover and compound acid, which is applied in the direction of earthwork drilling, production fluid, wellbore/well components, etc. It can solve the problems of secondary damage to oil layers, poor oil well treatment effect, small treatment radius, etc., and restore oil well productivity Effect

Inactive Publication Date: 2005-11-09
DONGYING HAODE GASOLINEEUM NEW TECH DEV
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Problems solved by technology

[0009] The purpose of the present invention is to provide a low-carbon organic compound acid plugging remover and its preparation method, to solve the problem that the above-mentioned inorganic plugging remover is easy to cause secondary damage to the oil layer, the treatment radius is small, and the treatment effect on oil wells with a relatively large plugging radius is poor. question

Method used

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  • Low carbon organic composite acid deblocking agent and its preparation method

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Effect test

example 1

[0036] Example 1: Indoor experiment of low-carbon organic compound acid plugging agent

[0037] Oil-free cores from Block Niu 25-C were used in the following performance tests. The mineral composition of the core is as follows; quartzite 35.2%-38.0%, orthoclase 33.4%-36.2%, cuttings 10.1%-19.2%, a small amount of calcite, and clay minerals 13.5%-19.8%. The test temperature is room temperature.

[0038] 1. The dissolution rate of low-carbon organic compound acid on rock samples

[0039] Table 1 shows the comparison of the dissolution rates of soil acid (12% hydrochloric acid + 3% hydrofluoric acid) and 10% low-carbon organic compound acid solution on formation rock samples.

[0040] conventional soil acid

10% low carbon organic compound acid

Reaction time / h

Dissolution rate / h

Reaction time / h

Dissolution rate / h

1

8.8

2

4.12

6

10.2

4

5.38

8

6.37

...

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Abstract

This invention discloses a low carbon organic composition acid deblock agent, its feature is that low grade fatty acid is synthesized through liquid wax cracking, washing powder and soap back distill waste liquor are synthesized through liquid wax saponification reaction. They are reacted according to similarity dissolve principle. The blocking remover content is organic acid, alkylfuran ketones, alkyl alkene, alcohols and activating agent, the quality content percent is that organic acid 44.9-43.9, alkylfuran ketones 12.9-11.9, alkyl alkene 32.5 -31.5, alcohols 2.4-1.4, activating agent 7.3-6.3.

Description

1. Technical field [0001] The invention relates to a low-carbon organic compound acid plug-removing agent for tertiary oil recovery in the later stage of oilfield development and a preparation method. 2. Background technology [0002] At present, inorganic plugging remover is mainly used for oil well plugging removal, which is an earlier and more common plugging removal agent. Its plugging removal mechanism is mainly to strongly acidify and dissolve oil layer rocks through inorganic acids, improve permeability, and achieve recovery. For the purpose of oil reservoir fluid, during the acidification process of inorganic acids, secondary damages such as acid residue and acid sensitivity are likely to occur. When the degree of damage is greater than the degree of permeability improvement, acidification itself is a kind of damage, which leads to limitations in the acidification of inorganic acids. [0003] There are mainly the following problems in today's general acidification: ...

Claims

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Application Information

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IPC IPC(8): E21B43/28
Inventor 臧宝仁韩宾
Owner DONGYING HAODE GASOLINEEUM NEW TECH DEV
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