Alcohol-soluble slickwater system for fracturing as well as preparation method and application of alcohol-soluble slickwater system

Abstract

The invention discloses an alcohol-soluble slickwater system for fracturing as well as a preparation method and application of the alcohol-soluble slickwater system, and relates to the technical fieldof acid fracturing agents. The slickwater system is composed of the following components in percentage by weight: 20.0-60.0% of a polyacrylamide polymer, 0.5-4.0% of nano particles, 0.1-3% of a surfactant, and the balance of organic alcohol.

Description

technical field

[0001] The invention relates to the technical field of acidified fracturing agents, in particular to an alcohol-soluble slippery water system for fracturing, a preparation method and application thereof. Background technique

[0002] In recent years, my country's dependence on foreign natural gas has increased year by year. In 2019, the proportion of imports has increased to 45%, making it the world's largest importer of natural gas. Therefore, increasing my country's natural gas production and ensuring energy supply capacity is the only way to maintain national security and maintain the stability of people's livelihood. The latest data shows that my country's shale gas reserves have reached 31.6 trillion cubic meters, ranking first in the world. Therefore, vigorous development of shale gas can effectively alleviate the tension in my country's natural gas supply shortage. Large-scale fracturing operations are the main production stimulation measures in my co...

Examples

Embodiment 1

[0026] Preparation of alcohol-soluble slippery water system:

[0027] 1.1 Raw materials:

[0028] Each raw material is by weight percentage, as shown in table 1 below:

[0029] Table 1 Embodiment 1 raw material list

[0030]

[0031] 1.2 Preparation method:

[0032] Put the organic alcohol into the reaction vessel, control the stirring rate at 2000r / min, add nanoparticles, surfactant, and anionic polyacrylamide in sequence, adjust the stirring rate to 1500r / min after the addition, and stir for 30 minutes to complete the fracturing process. Preparation of alcohol-soluble slippery water system.

Embodiment 2

[0034] Preparation of alcohol-soluble slippery water system:

[0035] 2.1 Raw materials:

[0036] Each raw material is by weight percentage, as shown in table 2 below:

[0037] Table 2 Embodiment 2 raw material table

[0038]

[0039] 2.2 Preparation method:

[0040] Put the organic alcohol into the reaction vessel, control the stirring rate at 3000r / min, add nanoparticles, surfactant, and cationic polyacrylamide in sequence, adjust the stirring rate to 1000r / min after the addition, and stir for 20 minutes to complete the fracturing process. Preparation of alcohol-soluble slippery water system.

Embodiment 3

[0042] Preparation of alcohol-soluble slippery water system:

[0043] 3.1 Raw materials:

[0044] Each raw material is by weight percentage, as shown in the following table 3:

[0045] Table 3 Embodiment 3 raw material table

[0046]

[0047] 3.2 Preparation method:

[0048] Put the organic alcohol into the reaction vessel, control the stirring rate at 2500r / min, add nanoparticles, surfactant, and anionic polyacrylamide in sequence, adjust the stirring rate to 1800r / min after the addition, and stir for 60 minutes to complete the fracturing process. Preparation of alcohol-soluble slippery water system.

technical field

[0001] The invention relates to the technical field of acidified fracturing agents, in particular to an alcohol-soluble slippery water system for fracturing, a preparation method and application thereof. Background technique

[0002] In recent years, my country's dependence on foreign natural gas has increased year by year. In 2019, the proportion of imports has increased to 45%, making it the world's largest importer of natural gas. Therefore, increasing my country's natural gas production and ensuring energy supply capacity is the only way to maintain national security and maintain the stability of people's livelihood. The latest data shows that my country's shale gas reserves have reached 31.6 trillion cubic meters, ranking first in the world. Therefore, vigorous development of shale gas can effectively alleviate the tension in my country's natural gas supply shortage. Large-scale fracturing operations are the main production stimulation measures in my co...

Examples

Embodiment 1

[0026] Preparation of alcohol-soluble slippery water system:

[0027] 1.1 Raw materials:

[0028] Each raw material is by weight percentage, as shown in table 1 below:

[0029] Table 1 Embodiment 1 raw material list

[0030]

[0031] 1.2 Preparation method:

[0032] Put the organic alcohol into the reaction vessel, control the stirring rate at 2000r / min, add nanoparticles, surfactant, and anionic polyacrylamide in sequence, adjust the stirring rate to 1500r / min after the addition, and stir for 30 minutes to complete the fracturing process. Preparation of alcohol-soluble slippery water system.

Embodiment 2

[0034] Preparation of alcohol-soluble slippery water system:

[0035] 2.1 Raw materials:

[0036] Each raw material is by weight percentage, as shown in table 2 below:

[0037] Table 2 Embodiment 2 raw material table

[0038]

[0039] 2.2 Preparation method:

[0040] Put the organic alcohol into the reaction vessel, control the stirring rate at 3000r / min, add nanoparticles, surfactant, and cationic polyacrylamide in sequence, adjust the stirring rate to 1000r / min after the addition, and stir for 20 minutes to complete the fracturing process. Preparation of alcohol-soluble slippery water system.

Embodiment 3

[0042] Preparation of alcohol-soluble slippery water system:

[0043] 3.1 Raw materials:

[0044] Each raw material is by weight percentage, as shown in the following table 3:

[0045] Table 3 Embodiment 3 raw material table

[0046]

[0047] 3.2 Preparation method:

[0048] Put the organic alcohol into the reaction vessel, control the stirring rate at 2500r / min, add nanoparticles, surfactant, and anionic polyacrylamide in sequence, adjust the stirring rate to 1800r / min after the addition, and stir for 60 minutes to complete the fracturing process. Preparation of alcohol-soluble slippery water system.

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