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A preparation method and application of delayed cross-linking agent A and B for vegetable gum fracturing fluid

A technology of delayed cross-linking and cross-linking agent, applied in chemical instruments and methods, drilling compositions, etc., can solve problems such as inability to meet the requirements of on-site use, and achieve the effect of reducing construction risks and making the process simple and adjustable

Active Publication Date: 2021-10-15
SICHUAN WELDON CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The single use of organic boron delayed cross-linking agent as a cross-linking agent can no longer meet the requirements of on-site use. Therefore, the research on cross-linking agents has become a priority in fracturing construction where flowback liquid is mixed or water quality changes greatly. important content

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  • A preparation method and application of delayed cross-linking agent A and B for vegetable gum fracturing fluid

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Embodiment Construction

[0020] The present invention will be described in further detail below with reference to specific embodiments.

[0021] A preparation method for delayed cross-linking agent A for vegetable gum fracturing fluid, comprising the following steps:

[0022] Step 1. Add 50-60g of water to the reaction flask, use 10-20g of solubilizer as a solvent, turn on stirring, and heat up to 60-80°C;

[0023] Step 2. Add 10-20g borate and 5-10g zirconium oxychloride into the reaction flask, stir for 10-20min, add 3-6g inorganic base after the borate and zirconium oxychloride are completely dissolved, and continue to stir for 10 minutes. -After 20min;

[0024] Step 3, adding 20-30 g of organic ligands, and continuing the reaction for 3 hours to obtain the cross-linking agent A body.

[0025] In this embodiment, in step 1, the solubilizer is one or more mixtures of methanol, ethylene glycol and isopropanol.

[0026] In this embodiment, in step 2, the borate is one or more mixtures of borax and ...

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Abstract

The invention discloses a method for preparing a delayed crosslinking agent A agent for vegetable gum fracturing fluid, which is characterized in that it comprises the following steps: a. Add 50-60g of water and 10-20g of solubilizer into the reaction bottle as Solvent, start stirring, and heat up to 60-80°C; b. Add 10-20g borate and 5-10g zirconium oxychloride into the reaction bottle, stir for 10-20min, until the borate and zirconium oxychloride are completely dissolved Then add 3-6g of inorganic base and continue to stir for 10-20min; c. Add 20-30g of organic ligand and continue to react for 3 hours to obtain the cross-linking agent A agent. The invention adjusts in time according to the change of the site base fluid in proportion to ensure the smooth completion of the construction.

Description

technical field [0001] The invention belongs to the field of oil and gas field fracturing reconstruction construction technology, and particularly relates to a preparation method and application of delayed crosslinking agent A and B for plant gum fracturing fluid. Background technique [0002] At present, vegetable gum, especially guar gum fracturing fluid, is commonly used in conventional fracturing of oil and gas wells. In fracturing fluid, cross-linking agent is one of the most important additives, and the quality of cross-linking performance directly affects the success or failure of construction. The existing crosslinking agent is mainly a single agent of organic boron delayed crosslinking agent. Compared with the previous inorganic boron crosslinking agent, the crosslinking agent has a certain delay time, and the formed colloid has high strength and temperature stability. it is good. However, its sensitivity to water quality (especially pH value) is very strong, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/66C09K8/68
CPCC09K8/665C09K8/685
Inventor 何伟王彬张灵张洪旭
Owner SICHUAN WELDON CHEM