Method for preparing proppant

A technology of proppant and curing agent, which is applied in the direction of chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the problems of unstable corrosion resistance of proppant and easy peeling off of the hydrophobic film on the surface of proppant, etc., to achieve The effect of shortening the preparation period, shortening the drying process, and preventing erosion

Active Publication Date: 2010-03-10
内蒙古仁创沙产业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the hydrophobic film on the surface of the proppant prepared by the method in the prior art is very easy to fall off, which causes the corrosion resistance of the proppant to be unstable, and to provide a proppant with stable corrosion resistance. Preparation method of proppant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Heat 10kg of quartz sand 20 / 40 mesh to 300°C, put it into a sand mixer, stir and then cool down to 200°C. Add 1 kg of phenolic resin to the heated quartz sand and stir evenly to form a mixture, then add 0.2 kg of hexamethylenetetramine and stir evenly. Before the phenolic resin-quartz sand mixture starts to agglomerate, add 0.05kg calcium stearate and 0.01kg polyether dimethyl siloxane and stir evenly. The obtained mixture is cooled, crushed and sieved to obtain a pre-proppant before the proppant is not coated with the hydrophobic polymer.

[0028] The pre-proppant was soaked in a dichloromethane solution of polydimethylsiloxane with a concentration of 50 wt %, soaked for 2 hours, and then dried at room temperature to obtain the proppant S1.

[0029] The purpose of heating the quartz sand is to provide a certain reaction temperature in the next step. In actual operation, the substrate can be heated to a higher temperature, such as 150-300°C, and then cooled to 100-240...

Embodiment 2

[0032] Heat 10kg of ceramsite sand 20 / 40 mesh to 260°C, put it into a sand mixer and stir it, then cool it down to 100°C. Add 0.2kg of furan resin to the heated ceramsite sand and stir evenly to form a mixture, then add 0.04kg of dibutyl phthalate, then add 0.02kg of benzenesulfonic acid and toluenesulfonic acid mixture and stir evenly. Add 0.004kg of ethylene bisstearic acid amide and 0.01kg of polyether methyl hydrogen siloxane before the furan resin-ceramic sand mixture starts to agglomerate and stir evenly. The obtained mixture is cooled, crushed and sieved to obtain a pre-proppant before the proppant is not coated with the hydrophobic polymer.

[0033] The pre-proppant was soaked in a dichloromethane solution of polymethylhydrogensiloxane with a concentration of 150 wt%, soaked for 1 hour, and then dried at normal temperature to obtain the proppant S2.

[0034] The role of dibutyl phthalate as a plasticizer is to improve the performance of the resin film, reduce its brittl...

Embodiment 3

[0036] Heat 10kg of quartz sand 20 / 40 mesh and ceramsite sand 20 / 40 mesh mixture to 300°C, put it into a sand mixer and stir it, then cool it down to 240°C. Add 1.5kg of furan resin to the heated mixture of quartz sand and ceramsite sand and stir evenly to form a mixture, then add 0.045kg of diisooctyl phthalate, and then add 0.045kg of xylenesulfonic acid and stir evenly. Add the mixture of 0.15kg polyethylene wax and oxidized polyethylene wax, 0.003kg polyhydroxyvinyl methyl hydrogen siloxane and stir evenly before the mixture of furan resin-quartz sand and ceramsite sand starts to agglomerate . The obtained mixture is cooled, crushed and sieved to obtain a pre-proppant before the proppant is not coated with the hydrophobic polymer.

[0037] Equal volumes of the pre-proppant were immersed in an ethanol solution of polymethylhydrogensiloxane with a concentration of 80 wt %, soaked for 2 hours, and then dried at room temperature to obtain proppant S3.

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PUM

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Abstract

The invention relates to a method for preparing a surface-modified proppant, which comprises the following steps: (a) heating a proppant substrate to 100 to 240 DEG C; (b) adding resin into the heated substrate with stirring to form a mixture to allow the resin to be coated on the surface of the substrate and then adding a curing with stirring to cure the resin coated on the substrate; (c) addinga lubricant and a macromolecular surfactant with string before the mixture of the resin and the substrate begin to cake; (d) obtaining the proppant by cooling, crushing and screening the mixture obtained by the step c; and (e) spraying, impregnating or soaking the proppant by a hydrophobic macromolecular solvent and drying the proppant to obtain the finished proppant. The proppant prepared by themethod has the advantage of stable environment corrosion resistance.

Description

technical field [0001] The invention belongs to the oil and gas well proppant in the field of oilfield exploitation, and in particular relates to a preparation method of the oil and gas well proppant in the field of oilfield exploitation. Background technique [0002] Due to the high viscosity of crude oil in the oilfield, the low porosity of rock formations and the poor connectivity of voids, it brings great difficulties to oil recovery. In order to increase crude oil yield and oil recovery rate, proppant is generally used to improve rock formation voids and void connectivity. Initially, people directly used quartz sand, ceramsite sand, etc. as proppants, but due to the need to bear large impact force and closure stress during use, a large number of fragments and fine silt will be produced, which will block the fracture and reduce the crack's proppant. diversion capacity. Therefore, at present, people usually coat one or more layers of resin film on the matrix of proppant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 秦升益
Owner 内蒙古仁创沙产业有限公司
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