Coated proppant and preparation method thereof

A proppant and film coating technology, which is applied in chemical instruments and methods, earthwork drilling, and fluid extraction, etc., can solve the problems of high construction risk, high density, and low compressive strength.

Inactive Publication Date: 2015-02-18
ELION RESOURCE GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the proppants used in fracturing processes at home and abroad are mainly quartz sand, ceramsite and pre-cured film-coated proppants, while domestic fracturing processes are still dominated by quartz sand and ceramsite. Among them, quartz sand is cheap and resource-intensive. It is abundant, but its compressive strength is low; although ceramsite solves the problem of low strength

Method used

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  • Coated proppant and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] (1) Heat the quartz sand (particle size: 0.5mm) to 250°C and pour it into the sand mixer; (2) When the temperature of the quartz sand reaches 200°C, add bismuth with an epoxy value of 0.18mol / 100g Phenol A epoxy resin (Langfang Nuoerxin Chemical Co., Ltd., model 603) and o-cresol novolac epoxy resin (Hunan Tuo Suo Technology Co., Ltd., TPCN-703) with an epoxy value of 0.55mol / 100g, stir evenly; (3 ) Add diaminodiphenylmethane (Chengdu Yuanda Chemical Co., Ltd.) to the above mixture, and stir until it is fully solidified; (4) Add phenol-formaldehyde resin with a softening point of 98°C to the result of step (3) (Shijiazhuang Feng United Fine Chemical Co., Ltd.), stir evenly; (5) when the temperature of the quartz sand drops to 95° C., add hexamethylenetetramine (Jinan Shengwang Chemical Co., Ltd.) to the result of step (4), stir until Quartz sand is uniformly dispersed; wherein, relative to 100 parts by weight of quartz sand, the total amount of phenol-formaldehyde resin...

Embodiment 2

[0025](1) Heat the quartz sand (particle size: 0.5mm) to 250°C and pour it into the sand mixer; (2) When the temperature of the quartz sand reaches 200°C, add bismuth with an epoxy value of 0.18mol / 100g Phenol A epoxy resin (Langfang Nuoerxin Chemical Co., Ltd., model 603) and o-cresol novolac epoxy resin (Hunan Tuo Suo Technology Co., Ltd., TPCN-703) with an epoxy value of 0.55mol / 100g, stir evenly; (3 ) Add diaminodiphenylmethane (Chengdu Yuanda Chemical Co., Ltd.) to the above mixture, and stir until fully solidified; (4) Add phenol-formaldehyde resin with a softening point of 90°C to the resultant of step (3) (Shijiazhuang Feng United Fine Chemical Co., Ltd.), stir evenly; (5) when the temperature of the quartz sand drops to 95° C., add hexamethylenetetramine (Jinan Shengwang Chemical Co., Ltd.) to the result of step (4), stir until Quartz sand is uniformly dispersed; wherein, relative to 100 parts by weight of quartz sand, the total amount of phenol-formaldehyde resin and...

Embodiment 3

[0027] (1) Heat the quartz sand (particle size: 0.5mm) to 250°C and pour it into the sand mixer; (2) When the temperature of the quartz sand reaches 200°C, add bismuth with an epoxy value of 0.18mol / 100g Phenol A epoxy resin (Langfang Nuoerxin Chemical Co., Ltd., model 603) and o-cresol novolac epoxy resin (Hunan Tuo Suo Technology Co., Ltd., TPCN-703) with an epoxy value of 0.55mol / 100g, stir evenly; (3 ) Add diaminodiphenylmethane (Chengdu Yuanda Chemical Co., Ltd.) to the above mixture, and stir until fully solidified; (4) Add phenol-formaldehyde resin with a softening point of 110°C to the result of step (3) (Shijiazhuang Feng United Fine Chemical Co., Ltd.), stir evenly; (5) when the temperature of the quartz sand drops to 95° C., add hexamethylenetetramine (Jinan Shengwang Chemical Co., Ltd.) to the result of step (4), stir until Quartz sand is uniformly dispersed; wherein, relative to 100 parts by weight of quartz sand, the total amount of phenol-formaldehyde resin and ...

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Abstract

The invention discloses coated proppant which contains quartz sand and a resin layer, wherein the quartz sand is coated with the resin layer; the resin layer comprises a pre-cured resin layer and a curable resin layer from the inside out; the curable resin layer contains thermoplastic phenolic resin with the softening point of 85-110 DEG C and a phenolic resin curing agent; relative to 100 parts by weight of thermoplastic phenolic resin, the content of the phenolic resin curing agent is 10-30 parts by weight; the pre-cured resin layer is formed by curing bisphenol A epoxy resin with the epoxy value of 0.04-0.32 mol/100 g, novolac epoxy resin with the epoxy value of 0.45-0.65 mol/100 g and an epoxy resin curing agent. Through the technical scheme, the coated proppant provided by the invention can resist high temperature and can effectively prevent the phenomena of formation sand production and proppant return.

Description

technical field [0001] The invention relates to the field of fracturing production of heavy oil wells, in particular to a film-coated proppant and a preparation method thereof. Background technique [0002] Petroleum fracturing proppant is mainly used in oil and natural gas deep well mining, especially the material that must be used in oil and gas mining with a well depth of more than 2000 meters. Closed fracturing treatment to support fractures from closing due to stress release, allowing oil and gas to flow out from fracture channels, thereby maintaining high oil and gas conductivity, increasing oil and gas production, and extending oil and gas well services to increase the economic benefits of oil and gas production. [0003] At present, the proppants used in fracturing processes at home and abroad are mainly quartz sand, ceramsite and pre-cured film-coated proppants, while domestic fracturing processes are still dominated by quartz sand and ceramsite. Among them, quartz...

Claims

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Application Information

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IPC IPC(8): C09K8/80
CPCC09K8/805
Inventor 高双之陈步宁王建伟周玉生张吉树田飞宇
Owner ELION RESOURCE GROUP
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