Environment-friendly high strength profile control water shut-off agent and preparation method thereof
A profile control water blocking agent, high-strength technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems such as human hazards, environmental pollution, profile control agent pollution, etc., to achieve good stability and environmental friendliness , Improve the effect of section ability and plugging ability
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Embodiment 1
[0034] In the profile control and water blocking agent of this embodiment, the mass concentration of polymer polyacrylamide is 6000mg / L, and the molecular weight of polyacrylamide is 10 million; The mass ratio of the polymer to the cross-linking agent is 4:1, that is, the mass percentage of the cross-linking agent polyethylene is 2500mg / L; the catalyst is acetic acid, and the mass percentage of acetic acid in the profile control and water shutoff agent is 0.01%; The mass percentage of the antioxidant sodium metabisulfite in the profile control water shutoff agent is 0.02%. The gelling time of the profile control and water shutoff agent in this embodiment is 24 hours, and the final setting strength reaches the G grade.
[0035] Preparation method: Weigh each component according to the proportion, add part of water to polyacrylamide, stir evenly to prepare a polyacrylamide solution with a mass concentration of 6000 mg / l, and mature at room temperature for 3 to 4 hours to obtain ...
Embodiment 2
[0037] In the profile control and water blocking agent of this embodiment, the mass concentration of polymer polyacrylamide is 8000mg / L, and the molecular weight of polyacrylamide is 10 million; The mass ratio of polymer to crosslinking agent is 6:1; the catalyst is acetic acid, and the mass percentage of acetic acid in the profile control and water shutoff agent is 0.01%; the mass percentage of antioxidant sodium metabisulfite in the profile control and water shutoff agent is 0.02% . The gelling time of the profile control and water shutoff agent in this embodiment is 40 hours, and the final setting strength reaches grade D.
[0038] Preparation method: Weigh each component according to the proportion, add part of water to polyacrylamide, stir evenly to prepare a polyacrylamide solution with a mass concentration of 6000 mg / l, and mature at room temperature for 3 to 4 hours to obtain the mature mother liquor. Then add the catalyst and the remaining water to the aging mother l...
Embodiment 3
[0040] In the profile control and water blocking agent of this embodiment, the mass concentration of polymer polyacrylamide is 8000mg / L, and the molecular weight of polyacrylamide is 10 million; The mass ratio of polymer to crosslinking agent is 8:1; the catalyst is citric acid, and the mass percentage of acetic acid in the profile control and water shutoff agent is 0.01%; the mass percentage of antioxidant sodium metabisulfite in the profile control and water shutoff agent is 0.02 %. The gelling time of the profile control and water shutoff agent in this embodiment is 40 hours, and the final setting strength reaches grade D.
[0041] Preparation method: Weigh each component according to the proportion, add part of water to polyacrylamide, stir evenly to prepare a polyacrylamide solution with a mass concentration of 6000 mg / l, and mature at room temperature for 3 to 4 hours to obtain the mature mother liquor. Then add the catalyst and the remaining water to the aging mother l...
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