Wear-resistant propping agent

A proppant, wear-resistant technology, applied in the direction of production fluid, wellbore/well components, drilling composition, etc., can solve the problem of poor wear resistance of the matrix coating layer, and achieve strength and wear resistance. Guarantee, improve the regularity, and the effect of the polymer network in the resin binder being regular and tight

Active Publication Date: 2010-07-07
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is: in the prior art, the proppant has the defect that the wear resistance of the matrix cladding layer is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Heat 100g of quartz sand with an average particle size of 0.45mm to 300°C, put it into a sand mixer and stir it, then cool it down to 200°C.

[0022] 10g of phenolic resin and 0.1g of single-walled carbon nanotubes with a diameter of 10nm and an axial length of 2μm are fully mixed, then mixed with heated quartz sand and stirred evenly to form a mixture, and then 2g of six Methylenetetramine and stir well. When the phenolic resin-quartz sand mixture starts to agglomerate, add 0.5g of calcium stearate and stir evenly. The obtained mixture is cooled, crushed and sieved to obtain proppant S1.

[0023] In this embodiment, the purpose of heating is to provide a certain reaction temperature for 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°C. The purpose of this is to remove the volatile impurities on the surface of the substrate raw material to ensure the subsequent coating. The bond b...

Embodiment 2

[0026] Heat 100g of ceramsite sand with an average particle size of about 0.85mm to 260°C, put it into a sand mixer, stir it, and then cool it down to 150°C.

[0027] 2g of furan resin and 0.1g of double-walled carbon nanotubes with a diameter of 20nm and an axial length of 5μm are fully mixed, then mixed with heated ceramsite sand and stirred evenly to form a mixture, and then 0.4 g dibutyl phthalate, then add 0.2 g of benzenesulfonic acid, toluenesulfonic acid mixture and stir well. The obtained mixture is cooled, solidified, crushed and sieved to obtain the proppant S2.

[0028] The role of dibutyl phthalate as a plasticizer is to improve the performance of the resin film, reduce its brittleness and increase its resistance to crushing.

Embodiment 3

[0030] Heat 100g of a mixture of quartz sand and ceramsite sand with an average particle size of about 0.3mm to 300°C, put it into a sand mixer and stir it, and then cool it down to 240°C.

[0031] After fully mixing 1.5g of furan resin with 0.0015g of single-walled carbon nanotubes with a diameter of 1 nm and an axial length of 0.1 μm, they are mixed with heated quartz sand and ceramsite sand and stirred evenly to form a mixture. Then, 0.45 g of di-isooctyl phthalate was added to the mixture, and then 0.45 g of xylenesulfonic acid was added and stirred evenly. Add the mixture of 1.5g polyethylene wax and oxidized polyethylene wax before the mixture of furan resin-quartz sand and ceramsite sand starts to agglomerate and stir evenly. The obtained mixture is cooled, crushed and sieved to obtain proppant S3.

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Abstract

The invention relates to a wear-resistant propping agent comprising a matrix and a matrix coating. The matrix coating is formed by the solidification of a resin binder and is added with a carbon nano tube, wherein the weight ratio of the resin binder and the matrix is 0.1-15:100, and the carbon nano tube accounts for 0.1-5wt% of the weight of the resin binder. The wear-resistant propping agent has the advantage of resisting environmental corrosion.

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 BEIJING RECHSAND SCI & TECH GRP
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