Microcapsule wrapping acid used for oil field and preparation method thereof
A technology of microcapsules and encapsulation of acids, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as the danger of nitric acid release to personnel, the poor etching effect of carbonate rocks, etc., and improve the effective working distance. , Strong rock etching ability, the effect of simplifying the construction process
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Embodiment 1
[0036] Embodiment 1: A kind of microcapsule encapsulation acid for oil field, it is made up of the raw material of following weight part:
[0037] Base Acid: 30; Cured Fill Material: 0;
[0038] wrapping material: 5; surfactant: 0;
[0039] solvent: 0;
[0040] Wherein, the basic acid is chloroacetic acid; the wrapping material is paraffin.
Embodiment 2
[0041] Embodiment 2: A kind of microcapsule encapsulation acid for oil field, it is made up of the raw material of following weight part:
[0042] Base Acid: 90; Cured Filling Material: 50;
[0043] wrapping material: 10; surfactant: 4;
[0044] Solvent: 30;
[0045] Wherein, the basic acid is a mixture of nitric acid and hydrofluoric acid; the wrapping material is a mixture of rosin and gelatin; the solid filling material is a mixture of urea and silicon dioxide; the surfactant is SP-80 and A mixture of Tween-60; the solvent is a mixture of diesel oil and white oil.
Embodiment 3
[0046] Embodiment 3: A kind of microcapsule encapsulation acid for oil field, it is made up of the raw material of following weight part:
[0047] Base Acid: 34; Cured Filling Material: 5;
[0048] Wrapping material: 6; Surfactant: 1;
[0049] Solvent: 5;
[0050] Wherein, the basic acid is a mixture of formic acid, acetic acid and chloroacetic acid; the wrapping material is a mixture of starch, modified starch and cellulose; the solid filling material is a mixture of starch, polyethylene glycol and polyacrylamide; The surfactant is a mixture of Tween-60, calcium oleate and calcium alkylsulfonate; the solvent is a mixture of white oil, mineral spirits and polyethylene glycol ethers.
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