Leak-proof leak-stopping reinforcing agent

Abstract

The invention discloses a leakage-proof leak-stopping reinforcing agent, which is prepared from the following components in parts by weight: 3 to 12 parts of sodium silicate; 1-6 parts of potassium silicate; 10 to 20 parts of calcium silicate; 0.1 to 0.5 part of polyacrylamide PAM; 10 to 25 parts of calcium hydroxide; 0.1 to 1 part of low viscosity polyanionic cellulose PAC-LV; 0.1 to 1 part of water-soluble polyamide resin powder; 2-6 parts of water-soluble urea formaldehyde resin powder. A preparation method comprises the following steps: sequentially adding the above substances into a container according to the components and contents at normal temperature and normal pressure by using a conventional preparation method, uniformly mixing and stirring, and drying, crushing or sieving to obtain a granular product with the particle size of 0.05-0.8 mm. The preparation method has the advantages that the raw materials are widely avaiable; the process is scientific and simple, constructionis safe, and certain coagulation capacity is achieved; single particles are solidified together; on the basis of early-stage filling, the setting and consolidation performance of leakage well walls can be improved, the leakage stratum well walls can be reinforced, the good characteristic of repairing broken easily-leaked stratum well walls is achieved, the compounding performance with different types of plugging slurry is good, the repairing and reinforcing performance of the plugging slurry is achieved, and the leakage-proof leak-stopping reinforcing agent can be widely applied to petroleum and geological drilling engineering.

Description

technical field [0001] The invention relates to the technical field of oil drilling engineering plugging, in particular to an anti-leakage plugging reinforcing agent. Background technique [0002] The plugging materials in oil drilling engineering often use cement, MTC plugging slurry, chemical gel plugging, hard walnut shell, hard shell powder, granite, large particle size calcium carbonate, etc. as plugging reinforcement agents. These plugging additives are The oil drilling project has made contributions, but it also has the following shortcomings or deficiencies: ①The above-mentioned plugging materials have poor reinforcement performance, and the various reinforcement plugging materials are only piled together and cannot be condensed; the entire plugging agent has no cementation performance; ②After the downhole conditions change or the circulating pressure of the pump is excited during the plugging construction, it is easy to cause re-leakage; The plugging construction f...

AI Technical Summary

Problems solved by technology

[0002] The plugging materials in oil drilling engineering often use cement, MTC plugging slurry, chemical gel plugging, hard walnut shell, hard shell powder, granite, large particle size calcium carbonate, etc. as plugging reinforcement agents. These plugging additives are The oil drilling project has made contributions, but it also has the following shortcomings or deficiencies: ①The above-mentioned plugging materials have poor reinforcement performance, and the various reinforcement plugging materials are only piled together and cannot be condensed; the entire plugging agent has no cementation performance; ②After the downhole conditions change or the circulating pressure of the pump is excited during the plugging construction, it is easy to cause re-leakage; The plugging construction failed, ④ the consumption of reinforcement plugging materials is large, the plugging time is long, the repeated leakage is serious, and the cost is high; ⑤ In order to further improve the reinforcement capacity, only increase the amount of plugging agents such as high water loss, MTC, cement slurry, etc. A hard plug is formed, and a new hole is easily formed when drilling the plug, which affects the drilling speed

⑥When the plugging strength is high and the pressure on the leaking well wall does not match, the skeleton formation of the leaking section is easy to be damaged, resulting in the instability of the well wall

⑦When the amount of the above treatment agents is too large, the density of the plugging slurry will be increased. The high density of the plugging slurry is easy to press the formation, and the free water is easy to leak after the cement is added, and the plugging effect is poor; ⑧The plugging process Easy to form high-strength plugging

When the amount of cement added is large, it is easy to solidify quickly, causing complex conditions downhole, causing great economic losses, and directly affecting the plugging effect and drilling engineering

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