Efficient leak-stopping material for drilling, and preparation method thereof
A plugging material and high-efficiency technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of difficult size control, poor plugging effect, easy crossing, etc., and achieve a wide range of particle size distribution and safe construction , the preparation of a simple effect
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Embodiment 1
[0023] 20-50 mesh modified pine sawdust 3%, 80-100 mesh modified pine sawdust 10%, 150-250 mesh modified pine sawdust 10%; shell powder 40%; acrylamide, methacryloyloxyethyl 15% of elastic particles copolymerized with dimethyl benzyl ammonium chloride, vinyl tris(2-methoxyethoxy) silane and dimethyl diallyl ammonium chloride; 22% of 100-400 mesh calcium carbonate, Mix and stir evenly under normal temperature and pressure to obtain a high-efficiency plugging material.
[0024] The experimental results show that the high-efficiency plugging material used for drilling can effectively plug the fractures with a fracture width of 1-2mm. During the plugging process, its own fluid loss is very small, and the cracks are densely cemented, which can quickly plug the fractures. Up to 7MPa or more.
Embodiment 2
[0026] 20-50 mesh modified pine sawdust 10%, 80-100 mesh modified pine sawdust 5%, 150-250 mesh modified pine sawdust 15%; shell powder 30%; sodium acrylate, acryloyloxyethyl dimethyl 25% of elastic particles copolymerized with benzyl ammonium chloride, vinyltriethoxysilane, and N,N-methylene bisacrylamide; 15% of calcium carbonate of 100-400 mesh, mixed and stirred evenly at normal temperature and pressure That is, high-efficiency plugging materials are obtained.
[0027] The experimental results show that the high-efficiency plugging material used for drilling can effectively plug the fractures with a fracture width of 2-4mm. During the plugging process, its own fluid loss is very small, and the cracks are densely cemented, which can quickly plug the fractures. Up to 7MPa or more.
Embodiment 3
[0029] 20-50 mesh modified pine sawdust 5%, 80-100 mesh modified pine sawdust 10%, 150-250 mesh modified pine sawdust 15%; shell powder 30%; sodium acrylate, acryloyloxyethyl dimethyl 25% of elastic particles copolymerized with benzyl ammonium chloride, vinyltriethoxysilane, and N,N-methylene bisacrylamide; 15% of calcium carbonate of 100-400 mesh, mixed and stirred evenly at normal temperature and pressure That is, high-efficiency plugging materials are obtained.
[0030] The experimental results show that the high-efficiency plugging material used for drilling can effectively plug the fractures with a fracture width of 1-3mm. During the plugging process, its own fluid loss is very small, and the cracks are densely cemented, which can quickly plug the fractures. Up to 7MPa or more.
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