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Proppant and preparation method thereof

A proppant and curing agent technology, applied in the field of oil and gas fields, can solve the problems of reduced conductivity of rock formation fractures, corrosion and damage of resin film, corrosion of cladding layer, etc., and achieve high strength, firm bonding, and uniform surface stress distribution Effect

Inactive Publication Date: 2016-10-05
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex downhole environment, the resin film on the surface of the proppant will be corroded and damaged, resulting in corrosion, degradation, and shedding of the cladding layer, which will greatly reduce the conductivity of rock formation fractures

Method used

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  • Proppant and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The proppant of the present invention is composed of the following components in parts by weight:

[0039] Aggregate: 200 parts

[0040] Bonding resin: 6 parts

[0041] Curing agent: 1.6 parts

[0042] Preparation:

[0043] Heat 200kg of quartz sand (20-70 mesh) to 250°C, add 3kg of phenolic resin, stir evenly, add 0.6kg of corresponding curing agent UTO, stir and cure for a period of 80 seconds, then add 3kg of phenolic resin and stir evenly, add curing agent corresponding 1 kg of solidifying agent Utop, stirred until completely solidified (when the sand is agglomerated), cooled and sieved to obtain the proppant S1 of the present invention.

Embodiment 2

[0045] Aggregate: 200 parts

[0046] Bonding resin: 20 parts

[0047] Curing agent: 5.33 parts

[0048] Preparation:

[0049] Heat 200kg of quartz sand (30-50 mesh) to 180°C, add 10kg of phenolic resin, stir evenly, add 3.73kg of corresponding curing agent Uto, stir and cure for a period of 50 seconds, add 10kg of epoxy resin, stir for a period of time, add the corresponding ring Oxygen resin curing agent (amine curing agent) 1.6kg, stirred until completely solidified (when the sand is agglomerated), cooled and sieved to obtain the proppant S2 of the present invention.

Embodiment 3

[0051] Aggregate: 200 parts

[0052] Bonding resin: 9 parts

[0053] Curing agent: 3.37 parts

[0054] Calcium stearate: 0.075 parts

[0055] Preparation:

[0056] Heat 200kg of quartz sand (40-60 mesh) to 200°C, add 6kg of epoxy resin, stir evenly, add 0.67kg of epoxy resin curing agent (amine curing agent), stir and cure for a period of 60 seconds, add 3kg of phenolic resin, Stir evenly, add 2.7 kg of curing agent Uto, stir until completely solidified (when the sand is agglomerated), cool and sieve to obtain the proppant S3 of the present invention.

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Abstract

The invention discloses a proppant and a preparation method thereof, and belongs to the technical field of oil and gas exploitation. The proppant comprises an aggregate and at least two layers of resin coated films coated on the aggregate, wherein the weight ratio of the aggregate to the resin coated film is 100:3-100:13; and the aggregate is quartz sand, ceramsite, glass microspheres, sintered bauxite, sintered aluminum oxide, sintered zirconium oxide or a mixture thereof, and the size of the aggregate is 10-200 meshes, preferably 20-70 meshes. By virtue of a multilayer film coating technology, the sphericity of the proppant can be improved, the density of the proppant can be reduced, and the chemical inertness and strength can be improved. The proppant disclosed by the invention can be widely applied to oil and gas field exploitation, is beneficial to improvement of the sand ratio, reduces the usage of fracturing fluid, eases the embedding of the proppant, improves the water resistance of the proppant, improves the fracture conductivity, and prolongs the effective fracturing period.

Description

technical field [0001] The invention relates to the field of oil and gas fields, in particular to a proppant and a preparation method thereof. Background technique [0002] In the process of exploration and development of oil and gas fields, especially in the exploration and development of low-permeability and ultra-low-permeability oil and gas fields and the reconstruction of old oil and gas wells, fracturing has become the main means of increasing production and improving recovery. [0003] In the fracturing process, the role of proppant is extremely important. When fractures are formed in the formation, the addition of proppant keeps the fractures supported. The proppant forms a medium for supporting fractures and provides conduction channels for the extraction of oil and gas. Therefore, the selection of proppant is the key to increase the production of oil and gas fields. [0004] The proppant is brought into and supported by the fracturing fluid in the fractures of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
Inventor 秦升益
Owner BEIJING RECHSAND SCI & TECH GRP
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