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Small particle size propping agent, and preparation method thereof

A small particle size, proppant technology, applied in the field of hydraulic fracturing, can solve problems such as difficult to meet the needs of fracturing reconstruction, high conductivity, and unfavorable proppant filling layers

Active Publication Date: 2019-07-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main components of the above-mentioned ultra-low density proppants are thermoplastic polymers, and the working temperature generally does not exceed 150 °C, so it is difficult to meet the fracturing needs of deep oil and gas fields with reservoir temperatures exceeding 150 °C; in addition, under a certain closure pressure, thermoplastic polymers It will lead to a large amount of deformation of the proppant, which is not conducive to maintaining a high conductivity of the proppant-packed layer

Method used

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  • Small particle size propping agent, and preparation method thereof
  • Small particle size propping agent, and preparation method thereof

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Effect test

Embodiment 1

[0063] This embodiment provides a small particle size proppant, the preparation method of which comprises the following steps:

[0064] The fly ash of 1500g (the apparent density of fly ash is 0.35-0.60g / cm 3 , the particle size distribution range is 5-45μm, the median particle size D 50 24μm heat-resistant temperature ≥ 500 ℃, compressive strength 83-110MPa) divided into two parts of 1200g and 300g. Drop into the first part of 1200g of fly ash and 1000g of microsilica powder in the mixing granulator (the apparent density of microsilica powder is 2.30-3.90g / cm 3 , the particle size distribution range is 1-6μm, the median particle size D 504μm, heat-resistant temperature ≥ 500°C, compressive strength not lower than fly ash), stirring at a speed of 1200 rpm for 1 minute; within 5 minutes, add 42.75g of 1, 2-di-n-hexyl diselenide (in the process of adding 1,2-di-n-hexyl diselenide, the mixer granulator kept stirring at a speed of 1200 rpm), and then continued to stir for 1 min...

Embodiment 2

[0072] This embodiment provides a small particle size proppant, the preparation method of which comprises the following steps:

[0073] The hollow glass microsphere of 1200g (the apparent density of hollow glass microsphere is 0.35-0.60g / cm 3 , the particle size distribution range is 5-45μm, the median particle size D 50 24μm heat-resistant temperature ≥ 500 ℃, compressive strength 83-110MPa) divided into two parts of 1020g and 180g. Drop into the first 1020g of hollow glass microspheres and 1000g of microsilica powder in the mixing granulator (the apparent density of microsilica powder is 2.30-3.90g / cm 3 , the particle size distribution range is 1-6μm, the median particle size D 50 4μm, heat-resistant temperature ≥ 500°C, compressive strength not lower than hollow glass microspheres), stirring at 1500 rpm for 1 minute;

[0074] After adding 41.75g ​​of 1,2-di-n-decyl diselenide in 10 batches in the mixing granulator within 5 minutes (in the process of adding 1,2-di-n-decyl...

Embodiment 3

[0082] This embodiment provides a kind of proppant, and its preparation method comprises the following steps:

[0083] The hollow glass microsphere of 1500g (the apparent density of hollow glass microsphere is 0.35-0.60g / cm 3 , the particle size distribution range is 5-45μm, the median particle size D 50 24μm heat-resistant temperature ≥ 500 ℃, compressive strength 83-110MPa) divided into two parts of 1200g and 300g.

[0084] Drop into the first 1200g of hollow glass microspheres and 1100g of bauxite in the mixing granulator (the apparent density of hollow glass microspheres is 0.35-0.60g / cm 3 , the particle size distribution range is 5-45μm, the median particle size D 50 24μm, heat resistance temperature ≥ 500℃, compressive strength 83-110MPa; apparent density of bauxite 2.30-3.90g / cm 3 , the particle size distribution range is 1-6μm, the median particle size D 50 4μm, heat-resistant temperature ≥ 500°C, compressive strength not lower than hollow glass microspheres), stir...

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Abstract

The invention provides a small particle size propping agent, and a preparation method thereof. The particle size of the small particle size propping agent ranges from 0.150 to 0.075mm, the apparent density ranges from 1.00 to 1.08g / cm<3>, and the volume density ranges from 0.40 to 0.50g / cm<3>. The small particle size propping agent comprises following raw materials: 40 to 60% of a chemically modified first powder material, 25 to 38% of a chemically modified second powder material, 15 to 20% of a thermosetting resin binder prepolymer, and 1 to 2% of an organic solvent. The preparation method comprises following steps: the thermosetting resin binder and the organic solvent are added into the chemically modified first powder material for binding granulation, at appropriate time, the chemically modified second powder material is added, continuous binding granulation is carried out so as to obtain particles; and the particles are dried, cured, cooled, and sieved so as to obtain the small particle size propping agent. The small particle size propping agent is capable of satisfying requirements of oil and gas well hydraulic fracturing or slickwater fracturing construction on small particle size propping agent.

Description

technical field [0001] The invention relates to a proppant with a small particle size and a preparation method thereof, belonging to the technical field of hydraulic fracturing. Background technique [0002] Hydraulic fracturing is one of the core technologies for the economical and effective development of low-permeability, ultra-low-permeability and unconventional oil and gas fields. Proppant is the key material to ensure the high conductivity of hydraulic fracturing fractures, and its efficient filling in fractures is crucial to ensure the fracturing effect. In the process of fracturing reconstruction, the fracturing fluid is injected into the underground reservoir under high-speed and high-pressure conditions to make it crack. Before the reservoir fracture is closed, the fracturing fluid carrying proppant enters the reservoir fracture. And support the fracture, the oil and gas fluid is discharged through the gap between the proppant layers under the action of formation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/80C09K8/805
Inventor 王萌车明光熊春明石阳王永辉王欣卢拥军韩秀玲李向东高莹
Owner PETROCHINA CO LTD