Chelating type blocking remover and preparation method and application thereof

A plug-removing agent, chelating-type technology, applied in the field of chelating-type plugging-removing agent and its preparation, can solve the problems of increased discharge treatment requirements, difficult post-treatment of residual acid, unobvious plug-removing effect, etc., to achieve non-corrosion equipment, improve long-term sustainability, and save manpower

Pending Publication Date: 2020-12-18
四川中汇安达石油化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, acidizing is a common technology for oil well plugging removal, but acidizing plugging removal is suitable for the damage caused by some inorganic substances in the vicinity of the wellbore to the reservoir, not suitable for deep plugging removal, and it has the effect of removing plugging for organic substances such as colloids, asphaltene and polymers. not obvious
Moreover, as the requirements for environmental protection are getting higher and higher, it

Method used

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  • Chelating type blocking remover and preparation method and application thereof
  • Chelating type blocking remover and preparation method and application thereof
  • Chelating type blocking remover and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043]The preparation method of the chelating type plugging agent in Example 1 is as follows: add 880 grams of water to the reaction kettle, heat it to 50°C, first weigh 10 grams of the dispersant polyacrylamide into the water, and stir it with a high-speed homogenizer for 1 After stirring evenly, add 50 grams of tetrasodium iminodisuccinate and 0 grams of tetrasodium edetate into the reaction kettle, and then continue to stir evenly. After the system is evenly dispersed, add two 50 grams of -1,6-hexamethylenetriamine pentamethylene phosphonic acid and 0 grams of polyaspartic acid were added to the reaction kettle, and the stirring was continued, and finally 10 grams of active synergist polyquaternium-37 was added, Continue high-speed stirring for 2 hours, stop stirring, cool down naturally, and age for 24 hours, the preparation is complete. The active substance content is 12%.

Embodiment 2

[0045] The preparation method of the chelating type plugging agent in Example 2 is as follows: add 100 grams of water to the reaction kettle, heat it to 50°C, first weigh 50 grams of the dispersant polyacrylamide and add it to the water, and stir it with a high-speed homogenizer for 1 Add 250 grams of chelating agent tetrasodium iminodisuccinate and 50 grams of chelating agent tetrasodium edetate into the reaction kettle after stirring evenly, and then continue to stir evenly. After the system is uniformly dispersed, add scale inhibitor double Add 300 grams of -1,6-hexamethylenetriamine pentamethylene phosphonic acid and 200 grams of polyaspartic acid into the reaction kettle, continue to stir evenly, and finally add 50 grams of active synergist polyquaternium-37, Continue high-speed stirring for 2 hours, stop stirring, cool down naturally, and age for 24 hours, the preparation is complete. The active substance content is 90%.

Embodiment 3

[0047] The preparation method of the chelating type plugging agent in Example 3 is as follows: add 710 grams of water to the reaction kettle, heat it to 50°C, first weigh 10 grams of the dispersant polyacrylamide into the water, and stir it with a high-speed homogenizer for 1 Add 100 grams of chelating agent tetrasodium iminodisuccinate and 20 grams of chelating agent tetrasodium ethylenediamine tetraacetate into the reaction kettle after stirring evenly, and then continue to stir evenly. 100 grams of -1,6-hexamethylene triamine pentamethylene phosphonic acid and 50 grams of polyaspartic acid were added to the reaction kettle, and the stirring was continued. Finally, 10 grams of active synergist polyquaternium-37 was added, Continue high-speed stirring for 2 hours, stop stirring, cool down naturally, and age for 24 hours, the preparation is complete. The active substance content is 29%.

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Abstract

The invention discloses a chelating type blocking remover, which is a multifunctional compound composition and comprises the following components in percentage by weight: 5%-30% of scale inhibitor Bis(hexamethylenetriaminepenta(methylenephosphonic acid)), 0%-20% of scale inhibitor polyaspartic acid, 5%-25% of chelating agent tetrasodium iminodisuccinate, 0%-5% of a chelating agent ethylenediaminetetraacetic acid tetrasodium salt, 1%-5% of an active synergist polyquaternium- 37, 1%-5% of a dispersing agent polyacrylamide and the balance of water. The chelating type blocking remover disclosed by the invention is safe, environment-friendly, non-toxic, non-irritant, non-explosive, non-corrosive to equipment, harmless to personnel and easy to degrade, efficient and lasting andcan effectively remove the formation insoluble scale; the construction is convenient; the process is simple; special injection equipment is not needed; the process is directly carried out after the reaction is ended;flowback is not needed; and the labor and the materials are saved.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and in particular relates to a chelating plug-removing agent and a preparation method and application thereof. Background technique [0002] With the rapid growth of the global economy, the dependence on petroleum resources is becoming more and more serious. Although scientific researchers have conducted systematic research on other energy sources, such as solar energy, wind energy, and nuclear energy, and have achieved gratifying results, 90 % of the energy required for transportation still needs to be obtained from petroleum, and the downstream industry chain of petroleum still plays an irreplaceable role in the whole industry. [0003] Due to the lack of protection awareness and human over-exploitation, global oil resource reserves have become less and less. As the world's energy supply becomes increasingly tense, how to improve oil recovery and obtain the highest economic benef...

Claims

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Application Information

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IPC IPC(8): C09K8/528
CPCC09K8/528
Inventor 王煌
Owner 四川中汇安达石油化工有限公司
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