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A low-density ultra-high-strength corrosion-resistant proppant and its preparation method

An ultra-high-strength, corrosion-resistant technology, applied in chemical instruments and methods, earth drilling, mining fluids, etc., can solve the problems of lower overall strength, pressure difference resistance, and low bonding efficiency

Active Publication Date: 2018-03-23
北京昆仑隆源石油开采技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, CN101580706A discloses a high-density ultra-high-strength petroleum fracturing proppant and a preparation method thereof, the bulk density and apparent density of the proppant are respectively 1.88-1.98g / cm3, 3.20-3.50g / cm3, Acid solubility is 3.40-5.20%, belongs to high-density proppant, and acid resistance is general; CN101691486A discloses a kind of ultra-high strength, super-high-density ceramsite proppant and its manufacturing method, its apparent density is greater than 3.50g / cm3, the same It belongs to high-density proppant; CN101838530B discloses a low-density high-strength ceramsite proppant and its preparation method. Although it is a low-density product, its strength can only be used under 52MPa closing pressure, and its pressure resistance is poor, so it does not belong to high-density proppant. Strength product, can't meet actual needs equally; CN102127418A discloses a kind of high-strength proppant and preparation method thereof, but its binding agent is added before phenolic resin, so bonding efficiency is not high, and its binding agent easily and phenolic resin Resin reaction, greatly reducing the overall strength

Method used

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  • A low-density ultra-high-strength corrosion-resistant proppant and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] See attached figure 1 , Grind 85% bauxite, 12% coal gangue, and 3% clay respectively into powders larger than 325 meshes, mix the powders evenly according to the proportion, put them into a disc granulator for spray granulation, and add the materials to granulate The order of the machine is to first add two-thirds of the total amount of bauxite and half of the amount of clay, stir evenly, so that the bauxite and clay are fully mixed and adhered, and then the remaining bauxite and coal gangue are evenly sprinkled into the making machine. Granulator, and add water appropriately, once agglomeration occurs, add clay and stir until all the bauxite and coal gangue are added, then add the remaining clay at one time, stir evenly, and after sieving, dry until the moisture is less than 3 %, put it in a resistance furnace for calcination at 1350°C for 3 hours, heat the temperature up to 300°C / h, keep it for 1 hour, and then cool and sieve to get 30-50 mesh aggregates, put 2kg of a...

Embodiment 2

[0030] Grind bauxite 90%, coal gangue 9%, and clay 1% respectively into powders larger than 325 mesh, mix the powders evenly according to the proportion, put them into a disc granulator for spray granulation, and sieve, Dry until the water content is less than 3%, put it into a resistance furnace for calcination at 1450°C for 3 hours, and then cool and sieve to obtain aggregates of 30-50 meshes. Put 2kg of aggregate in a resistance furnace and heat it to 280°C, then add it to the sand mixer Cool down to 230°C, add 30g of thermoplastic phenolic resin and stir for 30s, then add 10.5g of 40% urotropine aqueous solution and stir for 30s, then add 20g of epoxy resin (epoxy value 0.09-0.14mol / 100g) and stir for 30s, then Add 3g of epoxy resin curing agent (amine value 305KOH mg / g) and stir for 15s, and finally add 2g of silicone oil and stir for 20s, then crush, cool and sieve to obtain a 30-50 mesh low-density ultra-high-strength corrosion-resistant proppant. The detected bulk dens...

Embodiment 3

[0032] Put 2kg of the aggregate in Example 1 in a resistance furnace and heat it to 260°C, put it into a sand mixer and cool it down to 230°C, add 40g of thermoplastic phenolic resin and stir for 30s, then add 14g of 40% urotropine aqueous solution and stir for 30s , then add 20g of epoxy resin (epoxy value 0.04-0.065mol / 100g) and stir for 30s, then add 2g of epoxy resin curing agent (amine value 430KOHmg / g) and stir for 15s, and finally add 2g of liquid paraffin and stir for 20s, after crushing and cooling The 30-50 mesh low-density ultra-high-strength corrosion-resistant proppant can be obtained by sieving. The detected bulk density is 1.61g / cm3, the apparent density is ≤2.75g / cm3, the crushing rate is 1.74% under the closing pressure of 130MPa, and the acid solubility is ≤1.29%.

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Abstract

The invention discloses a low-density superhigh-strength corrosion-resistant propping agent and a preparation method thereof. The propping agent comprises aggregate, thermoplastic phenolic resin, a thermoplastic phenolic resin curing agent, epoxy resin, an epoxy resin curing agent and a dispersant. The aggregate comprises, by mass, 80-90% of bauxite, 9-15% of coal gangue and 1-5% of clay. A mass ratio of the thermoplastic phenolic resin to the aggregate is 2-4%. A mass ratio of the thermoplastic phenolic resin curing agent to the thermoplastic phenolic resin is in a range of 12-18%. A mass ratio of the epoxy resin to the aggregate is in a range of 1-3%. A mass ratio of the epoxy resin curing agent to the epoxy resin is in a range of 5-20%. A mass ratio of the dispersant to the aggregate is in a range of 0.1-0.5%. The propping agent has density greatly lower than that of the general high-strength propping agent so that an oil field pressing crack cost is greatly reduced.

Description

technical field [0001] The invention relates to a proppant used in the field of oil and gas field exploitation, in particular to a proppant with low-density, super-high-strength corrosion resistance and a preparation method thereof. Background technique [0002] With the development of oil and gas exploration, searching for and exploiting oil and gas deep in the formation has become the focus of oil extraction. As the wells get deeper and deeper, the temperature and pressure at the bottom of the well are high, which greatly increases the difficulty of mining. If the commonly used proppant is used in these deep wells, it will be difficult to withstand the high pressure in the formation and various corrosions in the deep environment, and will be broken in large quantities. The broken particles will migrate during the fracturing fluid flowback or oil and gas production process, blocking seepage Channels reduce the conductivity of fractures, or sand ejection occurs during fract...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 侯孟婧彭翔李边生
Owner 北京昆仑隆源石油开采技术有限公司
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