Preparation technology of self-suspension coated support material

Abstract

The invention belongs to the technical field of production of fluid ores of petroleum, natural gas, shale gas and the like, and particularly discloses a preparation technology of a self-suspension coated support material. The preparation technology comprises the following steps: (1) heating aggregate to the temperature of 80 to 230 DEG C, and stirring and mixing the heated aggregate; (2) cooling to the temperature of 75 to 200 DEG C, adding inner resin and a curing agent of the inner resin, and stirring, thus forming an inner coating layer; (3) cooling to the temperature of 65 to 190 DEG C, adding a drag reducer, and stirring; (4) cooling to the temperature of 55 to 130 DEG C, adding a catalyst, outer resin, an amine additive and a curing agent of the outer resin, and stirring, thus forming an outer coating layer; (5) cooling to the temperature of 40 to 80 DEG C, adding a blocking agent, and stirring; (6) cooling to the temperature of 30 to 70 DEG C, discharging out of a pot, and controlling the apparent density of a low-density support agent within the range of 1.05 to 2.60g/cm<3>. The self-suspension coated support material prepared by the preparation technology has the advantages that the flow guide property is good, the self-suspension property is good, and the friction drag is low.

Description

technical field [0001] The invention belongs to the technical field of fluid mineral exploitation such as oil, natural gas and shale gas, and in particular relates to a preparation process of a self-suspension film-coated support material. Background technique [0002] Hydraulic fracturing technology has been relatively mature at home and abroad. Petroleum fracturing proppant is one of the essential items in the fracturing process. Its performance will directly affect the effect of hydraulic fracturing. The apparent density is the key to evaluate the performance of proppant. One of the important indicators, the lower the apparent density, the lower its relative density relative to the fracturing fluid. When the proppant is mixed with the fracturing carrier fluid, the lower the apparent density, the easier it is to suspend in the fracturing fluid, thereby greatly reducing sedimentation rate. Push the pump farther during the pumping process. The high pumping pressure pumps t...

AI Technical Summary

Problems solved by technology

This type of product can indeed achieve semi-suspension in water and reduce the settling rate of proppant in water, but because the apparent density must be greatly reduced, its production cost will be greatly increased, and the performance of proppant, such as crushing, acid solubility, and diversion and other performance will be significantly reduced

However, the low production efficiency and high cost of resin pellets also limit its popularization and use.

Moreover, although the above-mentioned proppant can realize self-suspension in water, the frictional resistance of the carrier fluid has been greatly improved, so that a higher pump pressure is required to pump the proppant to the corresponding position during construction, which increases the construction cost.

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