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Cladded quartz sand fracturing support agent for oil production

A fracturing proppant and quartz sand technology, applied in the fields of fluid production, earth-moving drilling, wellbore/well components, etc., can solve the problems of low strength, low crushing resistance, high price, etc. Effect

Active Publication Date: 2005-07-20
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Quartz sand is cheap, about 200 yuan per ton, but its strength is not high, and its anti-breakage rate is low. In the case of high closure stress, the sand particles will be crushed, producing a large number of fragments and fine silt. Migrate in the cracks and block the cracks, thereby reducing the conductivity of the cracks; ceramsite sand has a high resistance to crushing, but due to its high price, it is about 1,600 yuan per ton, and the price of high-strength ceramsite sand is more expensive, and the price is about 2,200 yuan. At the same time, due to the relative density of ceramsite sand, the viscosity of the sand-carrying fluid is required to be high during construction, and the energy consumption is large, and the entire construction cost is also quite high. It is only used in formations with extremely high closure pressure.

Method used

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  • Cladded quartz sand fracturing support agent for oil production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Heat 3kg of quartz sand 20 / 40 mesh to 260°C and put it into a sand mixer for stirring. When the temperature drops to 200°C, add 3g of phenolic resin and stir evenly, then add curing agent hexamethylenetetramine to cure the resin film. Add the lubricant calcium stearate and stir evenly before the resin starts to solidify and agglomerate (block). It is best to cool, crush and sieve to obtain the finished high-strength proppant.

[0031] The weight ratio of the added amount of calcium stearate to resin is 0.1:100, 0.5:100, 1:100, 5:100, 10:100 respectively.

Embodiment 2

[0033] Heat 3kg of quartz sand 20 / 40 mesh to 260°C and put it into a sand mixer for stirring. When the temperature drops to 200°C, add 30g of phenolic resin and stir evenly, then add curing agent hexamethylenetetramine to cure the resin film. Add the lubricant calcium stearate and stir evenly before the resin starts to solidify and agglomerate (block). It is best to cool, crush and sieve to obtain the finished high-strength proppant.

Embodiment 3

[0035] Heat 3kg of quartz sand 20 / 40 mesh to 260°C and put it into a sand mixer for stirring. When the temperature drops to 200°C, add 120g of phenolic resin and stir evenly, then add curing agent hexamethylenetetramine to cure the resin film. Add the lubricant calcium stearate and stir evenly before the resin starts to solidify and agglomerate (block). It is best to cool, crush and sieve to obtain the finished high-strength proppant.

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Abstract

The present invention relates to one kind of fracturing proppant for petroleum production and its production process. The proppant comprises quartzite grains and hardened thermoset resin film coating the surface of the quartzite grains. The proppant of the present invention has high breaking strength and low cost, and may be used to replace expensive haydite sand.

Description

technical field [0001] The invention relates to a film-coated quartz sand fracturing proppant for oil production and a manufacturing method thereof. Background technique [0002] The crude oil in the oil field has high viscosity, low porosity of rock formations, and poor connectivity of voids, which bring great difficulties to oil production. In order to increase the oil recovery rate and oil production speed and reduce the cost, fracturing proppants are widely used to improve the porosity and connectivity of rock formations, and good results have been achieved. The commonly used proppants are quartz sand and ceramsite sand. Quartz sand is cheap, about 200 yuan per ton, but its strength is not high, and its anti-breakage rate is low. In the case of high closure stress, the sand particles will be crushed, producing a large number of fragments and fine silt. Migrate in the cracks and block the cracks, thereby reducing the conductivity of the cracks; ceramsite sand has a high...

Claims

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Application Information

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IPC IPC(8): C09C3/10E21B43/267
Inventor 秦升益张伟民仁国平
Owner BEIJING RECHSAND SCI & TECH GRP
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