Novel high-temperature-resistant nano-composite zirconium cross-linking agent as well as preparation method and application thereof

A nano-composite and cross-linking agent technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor shear resistance and high production costs, and achieve good temperature resistance and strong shear resistance , The effect of facilitating the promotion and application

Pending Publication Date: 2021-12-07
郑州市新郑梅久实业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a novel high temperature resistant nano-composite zirconium crosslinking agent and its preparation method an

Method used

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  • Novel high-temperature-resistant nano-composite zirconium cross-linking agent as well as preparation method and application thereof
  • Novel high-temperature-resistant nano-composite zirconium cross-linking agent as well as preparation method and application thereof
  • Novel high-temperature-resistant nano-composite zirconium cross-linking agent as well as preparation method and application thereof

Examples

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Example Embodiment

[0033] The invention also provides a preparation method of a novel high temperature resistant nano-composite zirconium crosslinking agent, comprising the following steps:

[0034] Step (1) Preparation of organic zirconium crosslinking agent: Weigh each raw material according to the ratio by weight, slowly add the inorganic zirconium salt to the ethylene glycol solution, and stir while adding until the inorganic zirconium salt is completely dissolved, and then the reaction system is Heating to 40°C, reacting in a closed environment for 1 hour, then warming up to 50°C, then adding polyol by weight, reacting for 1 hour, and finally adding organic acid, reacting for 2-3 hours; cooling the above reaction system to At room temperature, a pale yellow liquid is obtained, which is an organic zirconium crosslinking agent;

[0035] Step (2) Preparation of nanocomposite zirconium cross-linking agent: adding the nanoparticle material to the dispersing agent, and then using ultrasonic magne...

Example Embodiment

[0041] Example 1

[0042] A new type of high temperature resistant nano-composite zirconium crosslinking agent is composed of the following raw materials by weight: 45 parts of ethylene glycol, 7 parts of zirconium oxychloride, 15 parts of glycerol, 23 parts of lactic acid, 0.1 part of nano-silicon dioxide, 10 parts of absolute ethanol.

[0043] The preparation method of this crosslinking agent comprises the following steps:

[0044] Step (1) Preparation of organic zirconium crosslinking agent: Weigh each raw material according to the ratio by weight, slowly add zirconium oxychloride into the ethylene glycol solution, and stir while adding until the zirconium oxychloride is completely dissolved, and then the zirconium oxychloride is added. The reaction system was heated to 40 ° C, reacted in a closed environment for 1 hour, then heated to 50 ° C, then added glycerol by weight, reacted for 1 hour, and finally added lactic acid, and reacted for 2-3 hours; Cool to room temperat...

Example Embodiment

[0049] Example 2

[0050] A new type of high temperature resistant nano-composite zirconium crosslinking agent is composed of the following raw materials in parts by weight: 50 parts of ethylene glycol, 10 parts of zirconium oxychloride and zirconium tetrachloride in total, glycerol, sorbitol and mannitol in total. 18 parts, 26 parts of lactic acid, citric acid and acetic acid, 0.2 part of nano calcium carbonate, 20 parts of anhydrous methanol.

[0051] The preparation method of the cross-linking agent and the steps of using the cross-linking agent to prepare an acidic cross-linked fracturing fluid are the same as those in Example 1, and will not be repeated here.

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Abstract

The invention relates to a novel high-temperature-resistant nano-composite zirconium cross-linking agent as well as a preparation method and application thereof, and belongs to the technical field of oilfield chemistry. The cross-linking agent is prepared from the following raw materials in parts by weight: 45-50 parts of ethylene glycol, 7-10 parts of inorganic zirconium salt, 15-18 parts of polyhydric alcohol, 23-26 parts of organic acid, 0.1-0.2 part of a nano-particle material and 10-20 parts of a dispersing agent. The preparation method comprises the following two steps: firstly, an organic zirconium cross-linking agent is synthesized, and then the molecular surface of the organic zirconium cross-linking agent is modified by adopting a nano-particle material to prepare the nano-composite zirconium cross-linking agent. When the nano-composite zirconium cross-linking agent is applied to the acidic cross-linking fracturing fluid, good gel can be formed under high-temperature and acidic conditions, even gel can be formed under the condition that the concentration of the acidic cross-linking fracturing fluid is relatively low, the nano-composite zirconium cross-linking agent is high in shear resistance, good in temperature resistance and high in sand carrying capacity, the preparation method is simple, convenient to popularize and apply and suitable for industrial production, and good application prospects are realized.

Description

technical field [0001] The invention belongs to the technical field of oil field chemistry, and in particular relates to a novel high-temperature-resistant nano-composite zirconium crosslinking agent and its preparation method and application. Background technique [0002] As the demand for petroleum energy continues to grow, the development of deep wells, ultra-deep wells and unconventional oil and gas reservoirs will be the future development trend. The hydraulic fracturing of oil and gas layers plays a vital role in improving the productivity of oil and gas wells and the recovery of oil reservoirs, and is an indispensable link in the process of crude oil production. The fracturing fluid is the blood of the fracturing process, and its performance directly affects the effect of fracturing construction. Hydraulic fracturing is a commonly used oil and gas well stimulation technology in China. At present, the most widely used acidic fracturing fluid system is the fracturing f...

Claims

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Application Information

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IPC IPC(8): C09K8/68C09K8/88
CPCC09K8/685C09K8/887C09K2208/10
Inventor 郝缓陈厚发黄金岭卢凯伟
Owner 郑州市新郑梅久实业有限公司
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