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Cross-linking agent, its preparation, deep profile control agent and preparation and application of deep profile control agent

A deep profile control and cross-linking agent technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve problems such as poor stability, high cost, and poor salt resistance

Active Publication Date: 2022-05-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shortcomings of the weak gel itself limit further applications. First, poor salt resistance; second, poor stability; third, high cost

Method used

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  • Cross-linking agent, its preparation, deep profile control agent and preparation and application of deep profile control agent
  • Cross-linking agent, its preparation, deep profile control agent and preparation and application of deep profile control agent
  • Cross-linking agent, its preparation, deep profile control agent and preparation and application of deep profile control agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] This embodiment provides a deep profile control agent, which is prepared by a preparation method comprising the following steps:

[0050] Prepare cross-linking agent, denoted as A agent:

[0051] (1) Weigh 200kg of alkaline pulp waste liquid, pour it into a reaction kettle, and stir at 120r / min for 5min.

[0052] (2) Slowly add 70kg of resorcinol, 65kg of catechol, and 65kg of hydroquinone into the reaction kettle under stirring at 120r / min, and continue stirring for 30min.

[0053] (3) Add 40kg of ethylenediamine into the reaction kettle under stirring at 120r / min, and then raise the temperature to 70±1°C at a speed of 5°C / min.

[0054] (4) Add 320kg of formaldehyde and 30kg of glyoxal into the reaction kettle under stirring at 120r / min, raise the temperature to 85±1°C at a heating rate of 2°C / min, and stir for 45min.

[0055] (5) Heating is stopped to obtain the agent A, which is cooled to room temperature and packed in drums.

[0056] Prepare deep profile control ...

Embodiment 2

[0064] This embodiment provides a deep profile control agent, which is prepared by a preparation method comprising the following steps:

[0065] Prepare cross-linking agent, denoted as A agent:

[0066] (1) Weigh 200kg of alkaline pulp waste liquid, pour it into a reaction kettle, and stir at 120r / min for 5min.

[0067] (2) Slowly add 70kg of resorcinol, 65kg of catechol, and 65kg of hydroquinone into the reaction kettle under stirring at 120r / min, and continue stirring for 30min.

[0068] (3) Add 40kg of ethylenediamine into the reaction kettle while stirring at 120r / min, and then raise the temperature to 70±1°C at a heating rate of 5°C / min.

[0069] (4) Add 320kg of formaldehyde and 30kg of glyoxal into the reaction kettle under stirring at 120r / min, raise the temperature to 85±1°C at a heating rate of 2°C / min, and stir for 45min.

[0070] (5) Heating is stopped to obtain the agent A, which is cooled to room temperature and packed in drums.

[0071] Prepare deep profile c...

Embodiment 3

[0079] This embodiment provides a deep profile control agent, which is prepared by a preparation method comprising the following steps:

[0080] Prepare cross-linking agent, denoted as A agent:

[0081] (1) Weigh 200kg of alkaline pulp waste liquid, pour it into a reaction kettle, and stir at 120r / min for 5min.

[0082] (2) Slowly add 70kg of resorcinol, 65kg of catechol, and 65kg of hydroquinone into the reaction kettle under stirring at 120r / min, and continue stirring for 30min.

[0083] (3) Add 40kg of ethylenediamine into the reaction kettle while stirring at 120r / min, and then raise the temperature to 70±1°C at a heating rate of 5°C / min.

[0084] (4) Add 320kg of formaldehyde and 30kg of glyoxal into the reaction kettle under stirring at 120r / min, raise the temperature to 85±1°C at a heating rate of 2°C / min, and stir for 45min.

[0085] (5) Heating is stopped to obtain the agent A, which is cooled to room temperature and packed in drums.

[0086] Prepare deep profile c...

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Abstract

The invention provides a cross-linking agent, its preparation, a deep profile control agent and the preparation and application of a deep profile control agent. The raw material composition of the cross-linking agent includes 200-250 parts by weight of alkaline pulp waste liquid; Hydroquinone 70-75 parts by weight; Ethylenediamine 40-50 parts by weight; Formaldehyde 320-360 parts by weight; Glyoxal 30-50 parts by weight. The present invention also provides a deep profile control agent prepared from components including the above-mentioned cross-linking agent. The deep profile control agent provided by the present invention can fully meet the needs of on-site deep profile control; at the same time, the deep profile control agent also uses pulp waste liquid, which not only reduces the cost of the agent, but also plays a role in protecting the environment. The social benefit is remarkable and has Broad application prospects.

Description

technical field [0001] The invention relates to a crosslinking agent, its preparation, a deep profile control agent and the preparation and application of the deep profile control agent, and belongs to the technical field of oil field chemistry. Background technique [0002] During the water injection development process of the oilfield, due to the heterogeneity of the formation, most of the injected water enters the high permeability layer, resulting in uneven water injection profile. Sweep coefficient requires profile control of water injection wells, plugging of high permeability layers, and activation of medium and low permeability layers. However, due to the influence of the high-strength profile control agent for delaying the crosslinking time, the profile control radius is not large, generally ranging from a few meters to tens of meters. In reservoirs with severe interlayer flow, after profile control, the subsequent injected water bypasses the plugging control area ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/512
CPCC09K8/512C09K8/5083
Inventor 闫峰张洪君何强王浩亢思丹袁良秀张群郑猛张西子尹冰刘丽张秋丽刘玉
Owner PETROCHINA CO LTD