Recyclable surfactant fracturing fluid and reutilization method
A technology of surfactant and fracturing fluid, applied in the field of fracturing fluid, can solve problems that have not occurred yet, and achieve the effects of good technical prospects, good residual fluid recovery and utilization, and saving water for fluid preparation and chemical additives
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[0032] Example 1
[0033] As a preferred embodiment of the present invention, the recoverable surfactant fracturing fluid includes the following components by weight mixed:
[0034] Recyclable surfactant fracturing fluid thickener: 8 parts;
[0035] Clear water: 100 servings;
[0036] The recyclable surface active agent fracturing fluid thickener is made of 65% C 21 H 49 O 3 N 3 , 10%CH 3 CH 2 OH and 25%H 2 A mixture of O, where C 21 H 49 O 3 N 3 It is a paste of polyhydroxy quaternary ammonium salt, the structural formula is CH 3 -(CH 2 ) 18 -CH-C(NH 2 OH) 3 , Those skilled in the art can formulate it if they know the structural formula and name.
Example Embodiment
[0037] Example 2
[0038] As the most preferred embodiment of the fracturing fluid, the recoverable surfactant fracturing fluid includes the following components by weight mixed:
[0039] Recyclable surface active agent fracturing fluid thickener: 5-10 parts;
[0040] Potassium chloride solution: 100 parts;
[0041] The recyclable surfactant fracturing fluid thickener is composed of a mass ratio of 55-65% C 21 H 49 O 3 N 3 , 5-15%CH 3 CH 2 OH and 25-35%H 2 A mixture of O, where C 21 H 49 O 3 N 3 It is a paste of polyhydroxy quaternary ammonium salt, the structural formula is CH 3 -(CH 2 ) 18 -CH-C(NH 2 OH) 3 , The mass concentration of the potassium chloride solution is 0.5%-4.0%.
Example Embodiment
[0042] Example 3
[0043] As another preferred embodiment of the present invention, the method for reusing the recoverable surfactant fracturing fluid includes the following steps:
[0044] a. Take 5-10 parts of recyclable surfactant fracturing fluid thickener and 100 parts of clean water; the recyclable surfactant fracturing fluid thickener is composed of 55% C by mass 21 H 49 O 3 N 3 , 15%CH 3 CH 2 OH and 30%H 2 O composition mixture;
[0045] b. In step a, the above-mentioned parts by weight of the recyclable surfactant fracturing fluid thickener and the above parts by weight of the water or potassium chloride solution are passed into the sand mixer and directly mixed to form a recyclable surfactant fracturing fluid ;
[0046] c. Fracturing and hydraulically fracturing the recyclable surfactant mixed in step b into the cracks opened in the oil and water well formation at a temperature of 0°C to 150°C;
[0047] d. Shut down the well for 0.5-3.0 hours after fracturing, control the bl...
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