A kind of anti-salt drag reducer polymer and its synthesis process

Abstract

The invention discloses a salt-resistant drag reducer polymer and a synthesis process, which is characterized in that the parts by weight of each raw material are: 320-360 parts of pure water, 0.1-0.3 parts of Edta-2Na, 35-45 parts of baking soda, and 18 parts of acrylic acid —22 parts, AMPS 8-12 parts, acrylamide 75-85 parts, urea 14-18 parts. The invention has the outstanding advantages of simple production operation, stable product quality and extremely low impact on environmental pollution. At the same time, the product technical indicators have the advantages of fast dissolution, temperature and salt resistance, shear resistance, good compatibility, high drag reduction rate, etc., and are mainly used to reduce fracturing construction and other fluid pipeline transportation in shale oil and gas reservoirs and tight sandstone oil and gas reservoirs Resistance, play the role of increasing displacement and reducing power consumption.

Description

technical field

[0001] The invention belongs to the technical field of oilfield chemical drag reducers, and in particular relates to a salt-resistant drag reducer polymer and a synthesis process. Background technique

[0002] The drag reducer can be divided into solid particle type and emulsion type according to the form, which can reduce friction and reduce pumping pressure by more than 70% during the addition process. When the emulsion-type drag reducer comes into contact with water, it will be completely hydrolyzed, which improves the chaotic flow of the liquid, thereby reducing the pressure required for pumping and achieving the purpose of the predetermined flow rate. It can effectively reduce drag for water-based fluids, and can not only enhance the viscosity of guar gum fracturing systems, but also be used for fracturing in shale gas systems. The solid drag reducer is in the form of fine particles. If it is used at a higher dissolved concentration, it can be used as a...

Examples

Embodiment 1

[0032] Salt resistance drag reducer polymer ratio

[0033] raw material Dosage technical indicators features pure water 340 Dissolving speed 2-3 minutes Fast dissolving, good resistance to salt Edta-2Na 0.2 Can resist 50,000 salinity salt water baking soda 40 acrylic acid 19 AMPS 10 Acrylamide 80 urea 16.8

[0034] The synthesis process is as follows:

[0035] 1. Add pure water to the reactor, turn on the stirring motor of the reactor, and adjust the speed to 18r / min.

[0036] 2. Join EDTA. Stirring time 5 minutes.

[0037] 3. Slowly add baking soda and stir for 30 minutes until the material liquid becomes clear.

[0038] 4. Adjust the speed to 8r / min. Add acrylic acid, add slowly, and the feeding time is 30 minutes, so as to prevent a large number of bubbles from being generated in the reaction kettle.

[0039] 5. After the bubbles in the reactor disappear, adjust the speed to 15r / mi...

Embodiment 2

[0048] Salt resistance drag reducer polymer ratio

[0049] raw material Dosage technical indicators features pure water 340 Dissolving speed 2-3 minutes Fast dissolving, good resistance to salt Edta-2Na 0.2 Can resist 50,000 salinity salt water baking soda 30 acrylic acid 19 AMPS 10 Acrylamide 80 urea 16.8

[0050] The synthesis process is as follows:

[0051] 1. Add pure water to the reactor, turn on the stirring motor of the reactor, and adjust the speed to 18r / min.

[0052] 2. Join EDTA. Stirring time 5 minutes.

[0053] 3. Slowly add baking soda and stir for 30 minutes until the material liquid becomes clear.

[0054] 4. Adjust the speed to 8r / min. Add acrylic acid, add slowly, and the feeding time is 30 minutes, so as to prevent a large number of bubbles from being generated in the reaction kettle.

[0055] 5. After the bubbles in the reactor disappear, adjust the speed to 15r / mi...

Embodiment 3

[0064] Salt resistance drag reducer polymer ratio

[0065] raw material Dosage technical indicators features pure water 340 Dissolving speed 2-3 minutes Fast dissolving, good resistance to salt Edta-2Na 0.2 Can resist 50,000 salinity salt water baking soda 48 acrylic acid 19 AMPS 10 Acrylamide 80 urea 16.8

[0066] The synthesis process is as follows:

[0067] 1. Add pure water to the reactor, turn on the stirring motor of the reactor, and adjust the speed to 18r / min.

[0068] 2. Join EDTA. Stirring time 5 minutes.

[0069] 3. Slowly add baking soda and stir for 30 minutes until the material liquid becomes clear.

[0070] 4. Adjust the speed to 8r / min. Add acrylic acid, add slowly, and the feeding time is 30 minutes, so as to prevent a large number of bubbles from being generated in the reaction kettle.

[0071] 5. After the bubbles in the reactor disappear, adjust the speed to 15r / mi...

technical field

[0001] The invention belongs to the technical field of oilfield chemical drag reducers, and in particular relates to a salt-resistant drag reducer polymer and a synthesis process. Background technique

[0002] The drag reducer can be divided into solid particle type and emulsion type according to the form, which can reduce friction and reduce pumping pressure by more than 70% during the addition process. When the emulsion-type drag reducer comes into contact with water, it will be completely hydrolyzed, which improves the chaotic flow of the liquid, thereby reducing the pressure required for pumping and achieving the purpose of the predetermined flow rate. It can effectively reduce drag for water-based fluids, and can not only enhance the viscosity of guar gum fracturing systems, but also be used for fracturing in shale gas systems. The solid drag reducer is in the form of fine particles. If it is used at a higher dissolved concentration, it can be used as a...

Examples

Embodiment 1

[0032] Salt resistance drag reducer polymer ratio

[0033] raw material Dosage technical indicators features pure water 340 Dissolving speed 2-3 minutes Fast dissolving, good resistance to salt Edta-2Na 0.2 Can resist 50,000 salinity salt water baking soda 40 acrylic acid 19 AMPS 10 Acrylamide 80 urea 16.8

[0034] The synthesis process is as follows:

[0035] 1. Add pure water to the reactor, turn on the stirring motor of the reactor, and adjust the speed to 18r / min.

[0036] 2. Join EDTA. Stirring time 5 minutes.

[0037] 3. Slowly add baking soda and stir for 30 minutes until the material liquid becomes clear.

[0038] 4. Adjust the speed to 8r / min. Add acrylic acid, add slowly, and the feeding time is 30 minutes, so as to prevent a large number of bubbles from being generated in the reaction kettle.

[0039] 5. After the bubbles in the reactor disappear, adjust the speed to 15r / mi...

Embodiment 2

[0048] Salt resistance drag reducer polymer ratio

[0049] raw material Dosage technical indicators features pure water 340 Dissolving speed 2-3 minutes Fast dissolving, good resistance to salt Edta-2Na 0.2 Can resist 50,000 salinity salt water baking soda 30 acrylic acid 19 AMPS 10 Acrylamide 80 urea 16.8

[0050] The synthesis process is as follows:

[0051] 1. Add pure water to the reactor, turn on the stirring motor of the reactor, and adjust the speed to 18r / min.

[0052] 2. Join EDTA. Stirring time 5 minutes.

[0053] 3. Slowly add baking soda and stir for 30 minutes until the material liquid becomes clear.

[0054] 4. Adjust the speed to 8r / min. Add acrylic acid, add slowly, and the feeding time is 30 minutes, so as to prevent a large number of bubbles from being generated in the reaction kettle.

[0055] 5. After the bubbles in the reactor disappear, adjust the speed to 15r / mi...

Embodiment 3

[0064] Salt resistance drag reducer polymer ratio

[0065] raw material Dosage technical indicators features pure water 340 Dissolving speed 2-3 minutes Fast dissolving, good resistance to salt Edta-2Na 0.2 Can resist 50,000 salinity salt water baking soda 48 acrylic acid 19 AMPS 10 Acrylamide 80 urea 16.8

[0066] The synthesis process is as follows:

[0067] 1. Add pure water to the reactor, turn on the stirring motor of the reactor, and adjust the speed to 18r / min.

[0068] 2. Join EDTA. Stirring time 5 minutes.

[0069] 3. Slowly add baking soda and stir for 30 minutes until the material liquid becomes clear.

[0070] 4. Adjust the speed to 8r / min. Add acrylic acid, add slowly, and the feeding time is 30 minutes, so as to prevent a large number of bubbles from being generated in the reaction kettle.

[0071] 5. After the bubbles in the reactor disappear, adjust the speed to 15r / mi...

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