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A kind of drag reducing swelling proppant and preparation method thereof

A technology of proppant and expansion agent, which is applied in chemical instruments and methods, earthwork drilling, wellbore/well components, etc. It can solve problems such as poor solubility of slick water fracturing fluid, insufficient filling of fracture proppant, and decline in oil and gas production. , to achieve the effects of being conducive to suspension, low cost, and little damage to the formation

Active Publication Date: 2022-07-22
BEIJING QISINTAL NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the following problems in the above-mentioned prior art: poor solubility of slick water fracturing fluid, easy stratification of incompatible components, complex on-site configuration, low viscosity, poor sand-carrying ability, Insufficient filling of proppant causes oil and gas production to decline rapidly

Method used

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preparation example Construction

[0040] The present invention also provides a method for preparing the drag-reducing expansion proppant of the present invention, comprising the following steps:

[0041] 1) Heat the proppant aggregate, add liquid thermosetting resin and stir evenly;

[0042] 2) Add drag reducing expansion agent and stir evenly;

[0043] 3) Add the curing agent and stir until the material is completely dispersed;

[0044] 4) The material is cooled, crushed and screened.

[0045] According to the preparation method, the coupling agent is added when the liquid thermosetting resin is added.

[0046] According to the preparation method, wherein, in step 1), the proppant aggregate is heated to 120-150°C, and then the temperature is lowered. When the temperature drops to 80±20°C, a liquid thermosetting resin is added, and the proppant aggregate can be removed after the temperature is raised. Moisture and a small amount of impurities in the material, and then cooling down, can enhance the strength ...

Embodiment 1

[0055] Heat 10kg of quartz sand with a particle size of 850 / 425μm (20 / 40 mesh) to 150°C, put it into a self-made sand mixer and stir, cool it to 90°C and add 90g of E-54 bisphenol A epoxy resin, HTW -608 self-emulsifying epoxy resin 10g and γ-glycidyl ether propyl trimethoxysilane 1.0g and stir for 40 seconds, add QXJ-1 type drag reduction and expansion agent 100g and stir for 40 seconds, add curing agent 1,3-bisamino 18 g of methylcyclohexane was stirred and solidified until the particles were completely dispersed and then sieved to obtain the drag reducing expansion proppant-I of the present invention. The suspension volume of 10 g of proppant-I in 100 ml of tap water is 60 ml, and the viscosity of water is 52 mPa·s.

Embodiment 2

[0057] Heat 10kg of coated quartz sand with a particle size of 850 / 425μm (20 / 40 mesh) to 120°C, put it into a self-made sand mixer and stir, cool it to 90°C and add 60g of CYDF-170 bisphenol F epoxy resin , HTW-608 self-emulsifying epoxy resin 20g and stir for 40 seconds, add 90g of QXJ-1 type drag reduction and expansion agent and stir for 40 seconds, add 21g of T31 curing agent, stir and solidify, until the particles are completely dispersed and sieved, the present invention can be obtained The Drag Reducing Swelling Proppant-II. The suspension volume of 10 g of proppant-II in 100 ml of water is 58 ml, and the viscosity of water is 46 mPa·s.

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Abstract

The present invention relates to a drag-reducing expansion proppant and a preparation method thereof. The drag-reducing expansion proppant of the present invention includes proppant aggregate, drag-reducing and expansion agent and a binder, wherein the binder comprises a liquid thermosetting resin and a curing agent, and the amount of the proppant aggregate is 100 parts by weight , the amount of the binder is 0.2 to 2 parts by weight; wherein, the drag reducing and expanding agent is modified polyacrylamide, and the amount of proppant aggregate is 100 parts by weight, the drag reducing and expanding agent is The amount of the modified polyacrylamide is 0.2-2.5 parts by weight, and the modified polyacrylamide is a polyacrylamide copolymer compounded with water-based nano-silica. The drag-reducing and expanding proppant of the present invention expands rapidly when it sees water, increases the volume of the proppant, realizes full fracture filling proppant fracturing, and is soluble in water in a small amount, which is beneficial to increase the viscosity of water and reduce the frictional resistance of water during the fracturing process . At the same time, the dosage is greatly reduced, the damage to the formation is small, and it can be completely degraded.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field development, and in particular relates to a drag-reducing expansion proppant and a preparation method thereof. Background technique [0002] The effective development of unconventional oil and gas has become a research hotspot in the current energy field, especially in tight reservoirs and shale reservoirs. Conventional extraction methods have been difficult to apply to the development of unconventional oil and gas. Slippery water fracturing technology is widely used in the development of unconventional oil and gas reservoirs because of its large volume of reservoir stimulation, easy expansion and communication of natural fractures, and the formation of a complex fracture network system dominated by main fractures in the reservoir. [0003] Slippery water fracturing fluid system has been widely used in shale gas production and achieved significant economic benefits. However, in order to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/80C09K8/588
CPCC09K8/80C09K8/588C09K2208/28
Inventor 张伟民康瑞鑫张文博尹浦四
Owner BEIJING QISINTAL NEW MATERIAL
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