Leakage-proof leak-stopping filler

Abstract

The invention discloses a leakage-proof leak-stopping filler. The leakage-proof leak-stopping filler comprises the following raw materials in parts by weight: 6 to 15 parts of aluminum hydroxide, 8 to20 parts of silica powder for ceramic, 10 to 25 parts of talcum powder, 4 to 10 parts of sodium silicate, 10 to 20 parts of nano calcium carbonate, 2 to 10 parts of superfine calcium carbonate, 4 to20 parts of bluestone powder, 2 to 8 parts of graphite, 2 to 10 parts of white asphalt and 3 to 10 parts of calcium oxide. The preparation method comprises the following steps: sequentially adding thesubstances into a container according to the parts by weight at normal temperature and normal pressure, 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 raw materials are widely available; both physical filling and chemical micro-coagulation effect are realized; the leakage-proof leak-stopping filler can be dissolved in liquid, and enter into micro cracks along with liquid phase to form micro-gel, so that filling effect is improved; gel filling of stratums with different porosities is realized, so that the coagulation performance is improved, the problem that introduction of large particles is impossible, and retention of small particles is impossible is solved; plugging success rate is increased; wide applications in petroleum and geological drilling process are realized, and the leakage-proof leak-stopping filler is particularly suitable for being applied to fractured hard stratums and sandstone stratums.

Description

technical field [0001] The invention relates to the technical field of drilling and plugging agents, in particular to a leak-proof and plugging filler. Background technique [0002] The conventional plugging agents used in oil drilling generally use various inert materials such as shell powder, mica, stones of different particle sizes, and quartz sand as anti-leakage plugging fillers. These anti-leakage plugging fillers play an important role in oil drilling operations However, as oil exploration and development leaks become more and more serious, these fillers are far from meeting the current requirements, and have the following shortcomings or deficiencies: ①The fillers completely rely on physical filling for plugging, and the filling effect is poor; ② These fillers do not have coagulation performance, and the particle size of the filler does not match the leakage channel, so it cannot enter if it is too large, and it cannot be retained if it is too small); ③These fillers ...

AI Technical Summary

Problems solved by technology

[0002] The conventional plugging agents used in oil drilling generally use various inert materials such as shell powder, mica, stones of different particle sizes, and quartz sand as anti-leakage plugging fillers. These anti-leakage plugging fillers play an important role in oil drilling operations However, as oil exploration and development leaks become more and more serious, these fillers are far from meeting the current requirements, and have the following shortcomings or deficiencies: ①The fillers completely rely on physical filling for plugging, and the filling effect is poor; ② These fillers do not have coagulation performance, and the particle size of the filler does not match the leakage channel, so it cannot enter if it is too large, and it cannot be retained if it is too small); ③These fillers are used in large amounts and are easy to seal, and cannot play a filling role when the amount of filler is small , it is not easy to stay in the leakage fracture channel; when the amount is large, it is difficult to mix the slurry, the fluidity is poor, it is easy to seal in the leakage fracture channel, the filling and sealing effect is poor, and it cannot enter the deep part of the leakage layer; ④These plugging fillers are used in large quantities and flow Poor performance, although the small particle size can enter the cracks and the deep part of the channel, but because the plugging slurry does not have coagulation, re-leakage occurs when the pump cycle pressure is excited, resulting in repeated plugging, and the plugging effect is poor; ⑤ plugging materials Large consumption, long plugging time, and high cost of plugging; ⑥ The filler has a single performance and is prone to repeated leakage due to physical blockage; the compound application of these fillers has a slight plugging effect on permeability leakage, and the plugging construction is easy If the pump is blocked, it is not easy to feed water, and it is easy to damage the pump parts, resulting in the inability of continuous construction, failing to achieve the plugging effect, and easily causing downhole accidents

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