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Method for preparing agent body A and agent body B of delayed crosslinker for plant gum fracturing fluid

A delayed cross-linking and fracturing fluid technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve problems that cannot meet the requirements of on-site use, and achieve the effect of reducing construction risks and simple and adjustable processes

Active Publication Date: 2017-02-22
SICHUAN WELDON CHEM
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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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  • Method for preparing agent body A and agent body B of delayed crosslinker for plant gum fracturing fluid

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Embodiment Construction

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

[0021] A preparation method for delayed crosslinking agent A agent body for vegetable gum fracturing fluid, comprising the following steps:

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

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

[0024] Step 3: Add 20-30 g of organic ligands and continue to react for 3 hours to obtain the cross-linking agent A agent.

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

[0026] In the present embodiment, in step 2, the borate is one or more m...

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Abstract

The invention discloses a method for preparing an agent body A and an agent body B of a delayed crosslinker for a plant gum fracturing fluid. The method is characterized by including the following steps that firstly, 50-60 g of water and 10-20 g of solubilizer are added into a reaction bottle to serve as solvents, stirring starts, and the temperature is increased to 60-80 DEG C; secondly, 10-20 g of borate and 5-10 g of zirconium oxychloride are added into the reaction bottle and stirred for 10-20 min, 3-6 g of inorganic alkali is added after borate and zirconium oxychloride are completely dissolved, and stirring continues for 10-20 min; thirdly, 20-30 g of organic ligand is added, reaction continues for 3 h, and then the agent body A of the crosslinker is obtained. The proportion is adjusted in time according to changes of base solution conditions on site, and smooth construction is ensured.

Description

technical field [0001] The invention belongs to the field of oil and gas field fracturing reconstruction construction technology, and in particular relates to a preparation method and an 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 widely used in conventional fracturing of oil and gas wells. In the fracturing fluid, the cross-linking agent is one of the most important additives, and the quality of the cross-linking performance directly affects the success or failure of the construction. The existing crosslinking agent is mainly a single agent of organic boron delayed crosslinking agent. Compared with the previous inorganic boron crosslinking agent, this crosslinking agent has a certain delay time, and the formed colloid has higher strength and temperature stability. it is good. However, it is highly sensitive to water quality (especially pH ...

Claims

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Application Information

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