Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Nano delay viscosity breaking agent and preparation method thereof

A gel breaker, nano technology, applied in the field of nano delayed gel breaker and its preparation, can solve the problem of incomplete release of delayed gel breaker, achieve good mechanical stability and chemical stability, good slow release performance, good The effect of breaking glue

Inactive Publication Date: 2017-08-11
SOUTHWEST PETROLEUM UNIV
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the present invention: In order to achieve the purpose of delayed gel breaking in fracturing construction, and overcome the problem of incomplete release of conventional capsule delayed gel breakers, the present invention provides a nano-delayed gel breaker based on mesoporous materials and its Preparation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Preparation of nano-delayed breaker

[0022] (1) Add 0.3g trimethylhexadecylammonium bromide to 80mL deionized water, and add 0.175mL2mol.L -1 NaOH solution, stirred and heated to 80°C, then added dropwise 1.2mL tetraethoxysilane, stirred for another 2h after the dropwise addition, centrifuged and used ethanol solution of hydrochloric acid to remove trimethylhexadecyl ammonium bromide, That is, nanometer mesoporous silica is obtained;

[0023] (2) Disperse 1 g of nanometer mesoporous silica in 20 mL of deionized water, then add 0.2 g of ammonium persulfate and stir for 24 hours, load ammonium persulfate into the mesoporous channels of nanometer silica, centrifuge and wash with ethanol to obtain nanometer Delayed breaker.

[0024] 2. Delayed gel breaking ability of nano delayed gel breaker

[0025] Prepare two guar gum fracturing fluids, both with an original viscosity of 150mPa.s, add 0.5% nano-delay gel breaker to one of them, and directly add ammonium persulfate...

Embodiment 2

[0027] (1) Add 0.3g of trimethylhexadecylammonium bromide to 80mL of deionized water, and add 0.175mL of NaOH solution (2mol / L), stir and raise the temperature to 80°C, then add dropwise 1.2mL of tetraethoxy Base silane, after the dropwise addition, stir and react for 2h, centrifuge and remove trimethylhexadecyl ammonium bromide with ethanol solution of hydrochloric acid, to obtain nanometer mesoporous silica;

[0028] (2) Disperse 1 g of nano-mesoporous silica in 20 mL of deionized water, then add 0.5 g of sodium bisulfite and stir for 24 hours, load sodium bisulfite into the mesoporous channels of nano-silica, centrifuge and wash with ethanol A nano delayed gel breaker is obtained.

[0029] 2. Delayed gel breaking ability of nano delayed gel breaker

[0030] Prepare two guar gum fracturing fluids, both of which have an original viscosity of 150mPa.s, and add 0.1% ammonium persulfate to both fracturing fluids. One part was added with 0.5% nano delayed gel breaker, and the o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a nano delay viscosity breaking agent for oil field fracturing fluid and a preparation method thereof. The nano delay viscosity breaking agent uses nano mesoporous silica as a carrier, a viscosity breaking agent is carried into mesoporous channels to form the nano delay viscosity breaking agent, and the viscosity breaking agent is slowly released from the mesoporous channels to delay viscosity break. The preparation method of the nano delay viscosity breaking agent comprises the following steps: (1) preparing nano mesoporous silica from hexadecyl trimethyl ammonium bromide as a template agent and tetraethoxysilane as a precursor under an alkaline condition; and (2) dispersing mesoporous silica in deionized water, adding the viscosity breaking agent, stirring under dark for 24 h, carrying the viscosity breaking agent into the mesoporous channels of nano silica, centrifuging, and washing to obtain the nano delay viscosity breaking agent. The nano delay viscosity breaking agent of the invention has good mechanical and chemical stability, is simple to prepare, and has good delay effect. The nano delay viscosity breaking agent is a novel delay viscosity breaking agent based on the porous material, and has broad application prospects in oil and gas field fracturing.

Description

technical field [0001] The invention relates to a nano delayed gel breaker for oil field fracturing and a preparation method thereof. Background technique [0002] After the fracturing operation is completed, under the action of fracture closure stress, the fracturing fluid will leak out to form a filter cake, which will greatly increase the polymer concentration in the fracture. It is difficult to completely break the gel under the low concentration of the breaker. The fissure's ability to divert water can cause severe damage. If an excessive amount of gel breaker is added, the fracturing fluid will break the gel during the fracturing operation, resulting in wellbore screenout. The lower concentration of the gel breaker will lead to incomplete gel breaking and lower crack backflow ability. Therefore, the fracturing fluid must have good sand-carrying performance and thorough gel-breaking performance at the same time. [0003] In order to meet the requirements of effective...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K8/70C09K8/92
CPCC09K8/70C09K8/92C09K2208/26
Inventor 郑存川黄志宇鲁红升全红平
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com