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Organic polyacid metal crosslinking agent for guar gum fracturing fluid system, preparation method of organic polyacid metal crosslinking agent, and guar gum fracturing fluid system

A technology of metal cross-linking and guar gum, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of large amount of guar gum used, achieve low mass fraction, good high temperature viscosity, and reduce damage Effect

Active Publication Date: 2018-06-08
昆山京昆油田化学科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the commonly used crosslinking agent for guar gum fracturing fluid system is usually synthesized by using small molecular polybasic acid, polyol amine and titanium or zirconium metal, which has the problem of using a large amount of guar gum

Method used

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  • Organic polyacid metal crosslinking agent for guar gum fracturing fluid system, preparation method of organic polyacid metal crosslinking agent, and guar gum fracturing fluid system
  • Organic polyacid metal crosslinking agent for guar gum fracturing fluid system, preparation method of organic polyacid metal crosslinking agent, and guar gum fracturing fluid system

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preparation example Construction

[0034] The present invention also provides the preparation method of the organic polyacid metal crosslinking agent for the guar gum fracturing fluid system described in the above technical scheme, comprising the following steps:

[0035] (1) mixing water, inorganic acid, polyol amine and inorganic zirconium salt to obtain a zirconium salt mixed solution;

[0036] (2) mixing the zirconium salt mixed solution obtained in the step (1) with a macromolecular organic acid, and performing a complex reaction to obtain a complex product;

[0037] (3) Mix the complex product obtained in the step (2) with sodium hydroxide to obtain an organic polyacid metal crosslinking agent for the guar gum fracturing fluid system.

[0038] The invention mixes water, inorganic acid, polyol amine and inorganic zirconium salt to obtain zirconium salt mixed liquid. In the present invention, there is no special limitation on the order of adding the water, inorganic acid, polyol amine and inorganic zirconi...

Embodiment 1

[0047] An organic polyacid metal crosslinking agent for a guar gum fracturing fluid system, prepared from raw materials comprising the following parts by weight: 10 parts of zirconium tetrachloride, 5 parts of hydrochloric acid, 10 parts of triethanolamine, polyacrylic acid (linear , number average molecular mass is 2000) 5 parts, sodium hydroxide 5 parts, water 65 parts.

[0048] Add water, hydrochloric acid and triethanolamine to the reaction kettle, raise the temperature to 50°C, add zirconium tetrachloride under stirring, stir to dissolve, then add polyacrylic acid, react at constant temperature for 1 hour, and then continue to adjust the pH to 5 with sodium hydroxide. The organic polyacid metal crosslinking agent for the guar gum fracturing fluid system is obtained.

[0049] A guar gum fracturing fluid system will include the following components in mass percentage: 0.5% hydroxypropyl guar gum, 0.25% pH regulator, and the balance is the guar prepared in this embodiment O...

Embodiment 2

[0051] An organic polyacid metal crosslinking agent for a guar gum fracturing fluid system, prepared from the following raw materials in parts by weight: 10 parts of zirconium acetate, 5 parts of hydrochloric acid (37% by mass), 20 parts of triethanolamine, poly 20 parts of acrylic acid (body shape, number average molecular mass: 10000), 20 parts of sodium hydroxide, and 90 parts of water.

[0052] Add water, hydrochloric acid and triethanolamine to the reactor, raise the temperature to 20°C, add zirconium tetrachloride under stirring, stir to dissolve, then add polyacrylic acid, react at constant temperature for 4 hours, and then continue to adjust the pH to 10 with sodium hydroxide. The organic polyacid metal crosslinking agent for the guar gum fracturing fluid system is obtained.

[0053] A guar gum fracturing fluid system will include the following components in mass percentage: 0.2% hydroxypropyl guar gum, 0.15% pH regulator, and the balance is the guar prepared in this e...

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Abstract

The invention provides an organic polyacid metal crosslinking agent for a guar gum fracturing fluid system, and belongs to the fields of crosslinking agents for fracturing transformation of a hydrocarbon reservoir. The organic polyacid metal crosslinking agent is prepared from the following raw materials by weight: 1-20 parts of inorganic zircon salt, 1-10 parts of inorganic acid, 0-20 parts of polyalcohol amine, 1-20 parts of macromolecule organic acid, 1-20 parts of sodium hydroxide, and 50-90 parts of water. The inorganic zircon salt and the macromolecule organic acid are used to improve the molecular dimension of the organic polyacid metal crosslinking agent through the complex reaction, the mass fraction of a guar gum in the guar gum fracturing fluid system prepared through the provided organic polyacid metal crosslinking agent is low, and better high temperature viscosity is still kept under the condition that the use level of the guar gum is reduced.

Description

technical field [0001] The invention relates to the technical field of crosslinking agents for fracturing reconstruction of oil and gas reservoirs, in particular to an organic polyacid metal crosslinking agent for guar gum fracturing fluid systems, a preparation method thereof, and a guar gum fracturing fluid system. Background technique [0002] At present, fracturing stimulation technology has become an important measure for the stimulation of low-permeability oil and gas reservoirs, and is an effective means to increase oil and gas production. In China, a fracturing fluid system based on guar gum and its derivative cross-linked jelly has been formed. Because unconventional oil and gas fields such as low permeability have low permeability and fine grooves, the glue and its broken residue in the guar gum fracturing fluid system will cause damage to the formation, and the damage rate to the formation is 40-80%. . [0003] In the prior art, the commonly used cross-linking a...

Claims

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Application Information

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IPC IPC(8): C09K8/68
CPCC09K8/665C09K8/685C09K8/882
Inventor 何建平籍淑贤朱明山蒋杰邓明宇吴志明崔俊杰谢文龙周利英
Owner 昆山京昆油田化学科技有限公司
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