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Nanometer organic boron cross-linking agent as well as preparation method and application thereof

A technology of crosslinking agent and organoboron, which is applied in the field of chemical additives to achieve strong crosslinking effect, high crosslinking viscosity and sufficient gel breaking effect

Pending Publication Date: 2021-12-21
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] This application aims to solve the problem of the use of guar gum thickener on site, by adding the prepared nano-organic boron crosslinking agent to reduce the amount of guar gum thickener used in fracturing fluid, thereby reducing production costs and improving fracturing performance. liquid viscosity

Method used

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  • Nanometer organic boron cross-linking agent as well as preparation method and application thereof
  • Nanometer organic boron cross-linking agent as well as preparation method and application thereof
  • Nanometer organic boron cross-linking agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Nano organic boron cross-linking agent preparation steps are as follows:

[0043] (1) Weigh 2g of nano-silica and disperse it in 200mL of ethanol, sonicate for 15min, add 4g of APTES and place it in a 50°C oil bath to condense and reflux for 12h, then dry the product by rotary evaporation to obtain modified nano-silica ;

[0044] (2) Weigh 1 g of the nano-silica modified in step (1), add 20 g of triisopropyl borate, stir and react with magnetic force at 100°C for 3 hours, and dry the obtained product centrifugally to obtain a nano-organic boron crosslinking agent.

Embodiment 2

[0046] Nano organic boron cross-linking agent preparation steps are as follows:

[0047] (1) Weigh 2g of nano-silica and disperse it in 200mL of ethanol, sonicate for 15min, add 4g of APTES and place it in a 50°C oil bath to condense and reflux for 12h, then dry the product by rotary evaporation to obtain modified nano-silica ;

[0048] (2) Weigh 1 g of nano-silica modified in step (1), add 20 g of trimethyl borate, and react with magnetic stirring at 100° C. for 3 h, and dry the obtained product centrifugally to obtain a nano-organic boron crosslinking agent.

Embodiment 3

[0050] Nano organic boron cross-linking agent preparation steps are as follows:

[0051] (1) Weigh 2g of nano-silica and disperse it in 200mL of ethanol, sonicate for 15min, add 4g of APTES and place it in a 70°C oil bath to condense and reflux for 8h, then dry the product by rotary evaporation to obtain modified nano-silica ;

[0052] (2) Weigh 1 g of the nano-silica modified in step (1), add 20 g of triisopropyl borate, stir and react with magnetic force at 100°C for 3 hours, and dry the obtained product centrifugally to obtain a nano-organic boron crosslinking agent.

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Abstract

The invention discloses a nanometer organic boron cross-linking agent as well as a preparation method and application thereof, belonging to the technical field of chemical additives. According to the invention, nanometer silicon dioxide is adopted as a carrier, an amino silane coupling agent is grafted on the surface of the nanometer silicon dioxide, boric acid groups are grafted by taking the amino silane coupling agent as a bridge, and the boric acid groups are from boric acid ester. When the nanometer organic boron cross-linking agent provided by the invention is added into a fracturing fluid, the use amount of a guar gum thickening agent in the fracturing fluid can be effectively reduced, and the nanometer organic boron cross-linking agent has no pH value limitation requirement and has the characteristics of short gel breaking time, full gel breaking and the like.

Description

technical field [0001] The application relates to a nano-organic boron crosslinking agent and its preparation method and application, belonging to the technical field of chemical additives. Background technique [0002] Petroleum is an important pillar of the national economy, related to the development and security of the national economy, and closely related to people's lives. Over the years, the exploration and development technology of oil and natural gas has achieved rapid development. However, with the sharp increase of people's demand for energy, the overall supply-demand gap is gradually expanding. The stable supply of oil and gas resources is very important. [0003] With the continuous development of oil and gas field exploration technology, the reserves of low-permeability reservoirs and unconventional reservoirs account for more than half of all resources. However, due to the characteristics of tight lithology, low permeability, and large burial depth of oil and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
CPCC09K8/685C09K8/887C09K8/905
Inventor 邓青春刘艳华成瑾瑾吴向阳俞波田玉芹王耀国
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST CO LTD
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