Low-friction drag composite nano-proppant and preparation method thereof
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A proppant and low-friction technology, which is applied in chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the problem that proppant cannot reduce friction, fracturing fluid has high friction, and fracturing effect is not good. Good and other problems, to achieve good suspension, reduce friction, reduce the effect of equipment requirements
Active Publication Date: 2018-09-11
CHONGQING CHANGJIANG RIVER MOLDING MATERIAL GRP
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[0005] The purpose of the present invention is to provide a low-friction composite nano-proppant and its preparation method to solve the problem that the current proppant cannot reduce the friction in water, resulting in high friction of the configured fracturing fluid and poor fracturing effect. The problem of complex process and high cost
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Embodiment 1
[0034] This embodiment discloses a method for preparing a low-friction composite nano-proppant, which includes the following steps:
[0035] (1) taking styrene derivatives and / or acrylic acid derivatives, and divinylbenzene as comonomers, adding modified nano-fillers, and forming high-molecular polymers through suspension polymerization to obtain composite nano-aggregates;
[0036] Styrene derivatives include one or more of styrene, methylstyrene, ethylstyrene, and dimethylstyrene;
[0037] Acrylic acid derivatives include methyl acrylate, ethyl acrylate, butyl acrylate, hexyl acrylate, octadecyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, hexyl methacrylate, methyl One or more of octadecyl acrylate, methoxypolyethylene glycol methacrylate, methacrylic acid, and allyl methacrylate;
[0038] Modified nanofillers include surfactants, silane coupling agents, titanate coupling agents, cellulose modification, glass fiber, silicon titanium iron aluminum c...
Embodiment 2
[0050] The difference between Example 2 and Example 1 is that in step (4), the polyacrylamide is anionic polyacrylamide with a content of 0.2%; the drag reducer content is 1%, and the surfactant content is 0.5%.
Embodiment 3
[0052] The difference between embodiment 3 and embodiment 1 is: in step (4), polyacrylamide is selected anionic polyacrylamide for use, and its content is 0.1%; Drag reducer content is 0.8%; Surfactant is selected benzyl chloride for use, and its content 0.08%.
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Abstract
The invention belongs to the technical field of organic polymer materials, and discloses a preparation method of a low-friction drag composite nano-proppant. The preparation method comprises the following steps: (1) using a styrene derivative, an acrylic acid derivative and divinylbenzene as copolymerization monomers, adding a modified nano-filler, and performing suspension polymerization to obtain a high-molecular polymer in order to obtain composite nano-aggregates; (2) performing suction filtration on the composite nano-aggregates until the water content is less than 20%; (3) preparing a drag reducer; and (4) adding polyacrylamide, the drag reducer and a surfactant to the dried composite nano-aggregates, uniformly mixing the above obtained mixture, and drying and solidifying the mixture. The proppant prepared by the method rapidly releases a water-soluble substance which reduces the friction drag in the clean water, so the friction drag in fracturing construction using clear water containing the proppant as a fracturing sand-carrying liquid is lower than the friction drag in fracturing construction using the pure clear water as the fracturing the sand-carrying liquid, a conventional fracturing fluid construction fracturing technology is further simplified, and the use cost of the fracturing fluid is low.
Description
technical field [0001] The invention belongs to the technical field of organic polymer materials, and specifically discloses a low-friction composite nano proppant and a preparation method thereof. Background technique [0002] Proppant refers to natural sand or artificial high-strength ceramic particles with a certain particle size and gradation. It has high fracturing strength and is mainly used for downhole support in oil fields to increase oil and gas production. It is an environmentally friendly product. Proppants are generally divided into two categories, one is a proppant prepared from completely inorganic materials without any organic compound, usually quartz sand and artificial ceramsite sand; the other is a kind of proppant coated with inorganic materials Resin-coated proppant with a layer of organic matter, usually this kind of coated proppant is divided into two categories according to the function of the resin film, that is, curable coated proppant and pre-cured...
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