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Self-suspending proppant for hydraulic fracturing and preparation method thereof

A hydraulic fracturing and proppant technology, applied in chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the fisheye phenomenon of thickeners, poor sand suspension ability, and affect the viscosity of base fluid, etc. problem, to achieve the effect of fluffy thickener, increased area, and increased steric hindrance

Active Publication Date: 2018-08-21
TIANJIN XINXIANG PETROLEUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During fracturing construction, the base fluid, proppant, and crosslinking agent are evenly mixed and then injected into the bottom of the well. The whole process is tedious and time-consuming.
Improper handling in the process of configuring the base liquid can easily cause the formation of fish eyes in the thickener, affecting the viscosity of the base liquid, resulting in uneven cross-linking during construction and poor sand-suspending ability

Method used

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  • Self-suspending proppant for hydraulic fracturing and preparation method thereof
  • Self-suspending proppant for hydraulic fracturing and preparation method thereof
  • Self-suspending proppant for hydraulic fracturing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a. Preparation of acryloxy sorbitan sulfonate: add 400kg sorbitan monooleate, 70kg acrylic acid, 15kg p-toluenesulfonic acid as catalyst, 1kg hydroquinone in the reaction kettle, heat up to React at 80°C for 6 hours. Then add 140kg sodium sulfamate and continue to react for 2 hours for later use.

[0030] b. To clean the proppant, put 800kg of ceramsite proppant into the mixing tank, add a lot of water, and stir while washing.

[0031] c. Drain the water, add 50 kg of acryloxy sorbitan sulfonate prepared in step a, and stir evenly.

[0032] d. Raise the temperature to 60°C, add 100kg of polyacrylamide, and stir evenly.

[0033] e. Add 20 kg of methacryloyloxyethyl hexadecyl ammonium bromide and continue to stir for 2 hours. The temperature is lowered, the material is discharged, and the finished self-suspending proppant for hydraulic fracturing is obtained.

Embodiment 2

[0035] a. prepare acryloyloxy sorbitan ester sulfonate: add 350kg sorbitan monostearate in reactor, 70kg acrylic acid, 15kg p-toluenesulfonic acid as catalyst, 1kg hydroquinone is heated up to React at 80°C for 6 hours. Then add 140kg sodium sulfamate and continue to react for 2 hours for later use.

[0036] b. To clean the proppant, put 1000kg of quartz sand proppant into the mixing tank, add a large amount of water, and stir while washing.

[0037] c. Drain the water, add 30 kg of acryloxy sorbitan sulfonate prepared in step (1), and stir evenly.

[0038] d. be warmed up to 60 degrees Celsius, add 150kg hydroxypropyl guar gum, and stir evenly.

[0039] e. Add 20 kg of acrylamide ethyl octadecyl ammonium bromide and continue stirring for 2 hours. The temperature is lowered, the material is discharged, and the finished self-suspending proppant for hydraulic fracturing is obtained.

Embodiment 3

[0041] a. Preparation of acryloyloxy sorbitan ester sulfonate: add 400kg sorbitan monopalmitate, 70kg acrylic acid, 15kg p-toluenesulfonic acid as catalyst, 1kg hydroquinone in the reaction kettle, heat up to React at 80°C for 6 hours. Then add 140kg sodium sulfamate and continue to react for 2 hours for later use.

[0042] b. To clean the proppant, put 1000kg of quartz sand proppant into the mixing tank, add a large amount of water, and stir while washing.

[0043] c. Drain the water, add 100 kg of acryloxy sorbitan sulfonate prepared in step (1), and stir evenly.

[0044] d. heat up to 60 degrees Celsius, add 200kg xanthan gum, and stir evenly.

[0045] e. Add 50 kg of methacrylamide ethyl octadecyl ammonium bromide and continue stirring for 2 hours. The temperature is lowered, the material is discharged, and the finished self-suspending proppant for hydraulic fracturing is obtained.

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Abstract

The invention discloses a self-suspending proppant for hydraulic fracturing and a preparation method thereof. The self-suspending proppant comprises the following components in parts by weight: 100-1000 parts of a fracturing proppant, 30-200 parts of a thickening agent, 1-100 parts of acryloxy sorbitan sulfonate and 1-50 parts of a modifier. Sulfonic acid groups on the acryloxy sorbitan sulfonateare adsorbed to the surface of the proppant, double bonds at the other end and active groups of the thickening agent are tightly connected under the action of chemical bonds, so that the surface of the proppant is uniformly coated with the thickening agent more tightly and the thickening agent is unlikely to fall off; meanwhile, the spacial steric hindrance of the thickening agent can be increased, the thickening agent is more fluffy, the contact area between the thickening agent and water during dissolution is increased, the dissolution speed of the thickening agent is higher, and a fisheye phenomenon is unlikely to form.

Description

technical field [0001] This application belongs to the application field of oil, natural gas and unconventional oil and gas resources shale oil, shale gas, tight gas, coal bed methane and other fracturing stimulation technology application fields, relates to a proppant and its preparation method, in particular to a proppant for hydraulic fracturing A self-suspending proppant and a method for preparing the same. Background technique [0002] At present, the water-based fracturing fluid system commonly used in the industry needs to prepare the base fluid in advance. The base fluid contains thickener, water, drainage aid, foaming agent, bactericide, anti-swelling agent, etc. During fracturing construction, the base fluid, proppant, and crosslinking agent are evenly mixed and then injected into the bottom of the well. The whole process is tedious and time-consuming. Improper handling in the process of configuring the base fluid can easily cause the thickener to form a fish-eye ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/80
CPCC09K8/80
Inventor 齐占涛吴丹吴振华彭冠儒鲍素领
Owner TIANJIN XINXIANG PETROLEUM TECH CO LTD
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