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Polyacrylamide-containing expansion material composition, self-suspending proppant, and application and preparation method of self-suspending proppant

A technology of polyacrylamide and swelling materials, which is applied in drilling compositions, chemical instruments and methods, and earthwork drilling and production, and can solve problems such as difficulties in fracturing fluid transportation, polymer compounds blocking oil outlet pores, formation pollution, etc. , to achieve the effect of reducing viscosity, reducing difficulty of transportation, and reducing pollution

Inactive Publication Date: 2017-07-07
BEIJING RECHSAND SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of expansion material composition containing polyacrylamide and self-suspension proppant and its application and preparation method, the expansion material composition can be applied to the preparation of low relative density, can be suspended in clear water Self-suspension proppant to solve the technical problem that high-viscosity fracturing fluid is required to suspend proppant particles in the prior art, and high-viscosity fracturing fluid causes difficulty in fracturing fluid transportation, and at the same time it can solve the high The technical problem of molecular compounds blocking the oil outlet pores and polluting the formation

Method used

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  • Polyacrylamide-containing expansion material composition, self-suspending proppant, and application and preparation method of self-suspending proppant
  • Polyacrylamide-containing expansion material composition, self-suspending proppant, and application and preparation method of self-suspending proppant
  • Polyacrylamide-containing expansion material composition, self-suspending proppant, and application and preparation method of self-suspending proppant

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preparation example Construction

[0028] The present invention also provides the preparation method of above-mentioned self-suspending proppant, and this method comprises the following steps:

[0029] (1) Disperse and mix the proppant body, binder and curing agent uniformly at the first temperature to obtain granular aggregate with binder and / or curing agent attached, wherein, relative to 100 parts by weight of proppant agent body, the amount of the binder is 0.6-12 parts by weight, and the amount of the curing agent is 0.006-1.2 parts by weight;

[0030] (2) Dispersing and mixing the granular aggregate and the expansive material composition at a second temperature so that the expansive material composition is coated on the granular aggregate to obtain a granular self-suspending proppant , wherein, relative to 100 parts by weight of the proppant body, the amount of the expansion material composition is 0.6-12 parts by weight.

[0031] The preparation method of the self-suspending proppant of the present inven...

Embodiment 1

[0038] This example is used to illustrate the expansion material composition of the present invention and the preparation method and self-suspension proppant prepared from the expansion material composition.

[0039] The expansion material composition of this embodiment is 100 parts by weight of polyacrylamide (weight average molecular weight: 3 million) and 1 part by weight of gum arabic (Tai'an Dingli Rubber Industry Co., Ltd., DL-80).

[0040] (1) Using quartz sand (6-10 mesh in particle size) as raw material, after scrubbing and drying at 120°C for 5 hours, screen 6-40 mesh quartz sand as aggregate;

[0041] (2) Take 100 parts by weight of screened quartz sand, heat it to 240°C, add 0.6 parts by weight of epoxy resin E-51 (618), 0.006 parts by weight of curing agent phthalic anhydride, stir and mix evenly to obtain a binder package Covered granular aggregate;

[0042] (3) When the temperature of the above-mentioned binder-coated granular aggregate drops to 180° C., add 0....

Embodiment 2

[0045] This example is used to illustrate the expansion material composition of the present invention and the preparation method and self-suspension proppant prepared from the expansion material composition.

[0046] The expansion material composition of this embodiment is 100 parts by weight of polyacrylamide (weight average molecular weight: 20 million) and 15 parts by weight of locust bean gum (Jining Huakai Resin Co., Ltd.).

[0047] (1) Take 100 parts by weight of ceramsite (particle size is 100-200 mesh), heat to 190°C, add 12 parts by weight of binder bisphenol A type unsaturated polyester 3301, add curing agent phthalic anhydride 0.9 parts by weight, stirred and mixed evenly to obtain binder-coated granular aggregate;

[0048] (2) When the temperature of the above-mentioned binder-coated granular aggregate drops to 80° C., add 12 parts by weight of the above-mentioned expansion material composition, and stir and mix evenly.

[0049] (3) cooling, crushing, and sieving ...

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Abstract

The invention discloses a polyacrylamide-containing expansion material composition, a self-suspending proppant, and application and a preparation method of the self-suspending proppant. A proppant body is coated with the expansion material composition; the expansion material composition may swell fast in water to form a stable aqueous layer on the outer surface of proppant particles, the relative density of the proppant particles is reduced, and few organic molecules in the expansion material composition may expand in water, increasing the viscosity of the water, which may also facilitate the suspending of the proppant particles in water; in addition, the self-suspending proppant according to the invention may use water as a fracturing liquid, there is no need for preparing the fracturing liquid, the operation is convenient, equipment is simple, the use of organic solvents is avoided, the viscosity of the fracturing liquid may also be reduced, and conveying the fracturing liquid is less difficult; adding extra macromolecular compounds to the fracturing liquid is not required, the problem that macromolecular compounds enter underground with the fracturing liquid and block oil-gas production pores is avoided, and formation contamination due to the macromolecular compounds is also reduced.

Description

technical field [0001] The invention relates to the field of fluid mine mining, in particular to an expansion material composition containing polyacrylamide, a self-suspension proppant, and an application and preparation method thereof. Background technique [0002] In the mining process of fluid mines such as oil and natural gas, it is often necessary to use fracturing technology, that is, a method that uses hydraulic action to form cracks in oil and gas layers, so it is also called hydraulic fracturing. Hydraulic fracturing is the use of surface high-pressure pumps to squeeze fracturing fluid with high viscosity into the oil layer through the wellbore. When the rate of injection of fracturing fluid exceeds the absorption capacity of the oil layer, a very high pressure will be formed on the oil layer at the bottom of the well. When this pressure exceeds the fracture pressure of the oil layer near the bottom of the well, the oil layer will be pushed open and fractures will b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/26C08L5/00C08L89/00C08L63/00C08L61/06C08L79/08C08L67/06C08K3/36C08K3/22C08K3/34C08K7/20C09K8/80
CPCC08L33/26C08L61/06C08L63/00C08L67/06C08L79/08C08L2205/03C08L2205/035C09K8/805C08L5/00C08K3/36C08K3/34C08L89/00C08K7/20C08K2003/2227C08K2003/2244
Inventor 秦升益王中学
Owner BEIJING RECHSAND SCI & TECH GRP
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