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A kind of preparation method of water-dispersed guar gum fracturing fluid crosslinking agent

A guar gum fracturing fluid and cross-linking agent technology, which is applied in the field of nanomaterials, can solve the problems of substandard properties such as residue content, complex synthesis industry, slow liquid preparation, etc., achieve effective and economical fracturing construction process, and simple preparation process , the effect of reducing energy consumption

Active Publication Date: 2018-04-10
河南海博瑞硅材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The hydroxypropyl guar gum fracturing fluid system uses inorganic boron as the cross-linking agent, which has problems such as slow liquid preparation, insufficient dissolution, low cross-linking efficiency, and too fast cross-linking speed; for the problems of boron cross-linking agent, it is commonly used The best solution is to carry out organic compounding or use transition metal and organometallic crosslinking agents as substitutes. Shearing, gel breaking, residue content and other performance problems are not up to standard; and high temperature resistant organoboron crosslinking agents also have problems such as low chelation degree, high concentration, and complex synthesis industry, which limit their use

Method used

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  • A kind of preparation method of water-dispersed guar gum fracturing fluid crosslinking agent
  • A kind of preparation method of water-dispersed guar gum fracturing fluid crosslinking agent
  • A kind of preparation method of water-dispersed guar gum fracturing fluid crosslinking agent

Examples

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Embodiment 1

[0018] A preparation method of a water-dispersed guar gum fracturing fluid cross-linking agent, comprising the following steps: adding 4 g of boric acid to 50 mL of glycerol, adding ammonia water to adjust the pH to 8, heating up to 40° C., stirring at a constant speed of 300 rpm for 0.5 h, adding boric acid Dissolve completely; raise the temperature to 60°C, add 14g of γ-aminoethylaminopropyltrimethoxysilane, stir at a constant speed of 200rpm for 4h, raise the temperature to 90°C, continue to stir for 1h, suction filter and dry to obtain solid guar gum fracturing fluid crosslinking agent.

[0019] Such as figure 1 As shown, the particle size of the guar gum fracturing fluid crosslinking agent prepared above was measured by a laser particle size tester to be about 2 nanometers. The cross-linking agents prepared above were respectively configured into cross-linking solutions with mass fractions of 0.5%, 1%, 2% and 3%, and their light transmittances were 91.5%, 92.7%, 77.7% an...

Embodiment 2

[0023] A preparation method of a water-dispersed guar gum fracturing fluid cross-linking agent, comprising the following steps: adding 5 g of borax to 50 mL of formamide, adding sodium hydroxide solution to adjust the pH to 7, heating up to 40° C., and stirring at a constant speed of 300 rpm for 0.5 h Until the borax is completely dissolved; heat up to 60°C, slowly add 10g of γ-aminoethylaminopropyltrimethoxysilane dropwise, stir at a constant speed of 150rpm for 4h, and distill under reduced pressure to obtain an emulsion-like guar gum fracturing fluid crosslinking agent.

[0024] The particle size of the guar gum fracturing fluid crosslinking agent prepared above was measured by a laser particle size tester to be about 2 nanometers. The cross-linking agent prepared above was configured into a cross-linking liquid with a mass fraction of 1%, and a guar gum solution with a mass fraction of 0.3%. Take 2 ml of cross-linking solution and add it to 100 ml of guar gum solution with...

Embodiment 3

[0026] A preparation method of a water-dispersed guar gum fracturing fluid cross-linking agent, comprising the following steps: adding 4 g of boric acid to 20 mL of ethanol, adding ammonia water to adjust the pH to 8, raising the temperature to 40° C., and stirring at a constant speed of 300 rpm for 1 hour until the boric acid is completely dissolved; Raise the temperature to 60°C, add 4g of γ-(2,3-glycidoxy)propyltrimethoxysilane, stir at a constant speed of 200rpm for 4h, raise the temperature to 90°C, continue to stir for 1h, suction filter and dry to obtain solid guanidine Glue fracturing fluid crosslinking agent.

[0027] The particle size of the guar gum fracturing fluid crosslinking agent prepared above was measured by a laser particle size tester to be about 2 nanometers. The nano-crosslinking agent prepared above was configured into a crosslinking solution with a mass fraction of 1%, and a guar gum solution with a mass fraction of 0.3%. Take 2 ml of cross-linking sol...

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Abstract

The invention discloses a preparation method of a water-dispersible guanidine gum fracturing fluid cross-linking agent. The preparation method includes the following steps that inorganic boron containing boric acid ions is added into a reaction medium with the pH of 4-11 and the temperature of 20-70 DEG C, and the mixture is stirred for 0.5-1 h at the constant speed within 150-300 rpm; then, an organosilicon compound containing reactable functional groups is added, the mixture is stirred for 1-8 h at the constant temperature within 20-120 DEG C, and a cross-linking material is obtained; the cross-linking material is subjected to suction filtration and dried to obtain a solid cross-linking agent, or the cross-linking material is subjected to reduced-pressure distillation to obtain an emulsion-type cross-linking agent. The adopted preparation process is simple, the cross-linking agent can be rapidly dispersed into water at normal temperatures and pressure, cross-linking density and cross-linking time can be regulated and controlled, and controllable time can be obtained for construction; meanwhile, friction drag between fracturing fluid and a delivery pipeline in the construction process can be effectively reduced, and energy consumption can be lowered.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of a water-dispersed guar gum fracturing fluid crosslinking agent. Background technique [0002] 82% of my country's proven oil geological reserves are low-permeability oil and gas fields, and fracturing and fracture-making technology is one of the main technical means to enhance the recovery of low-permeability oil and gas fields. Fracturing fluid is an important part and key link of fracturing and fracture creation technology. High quality, low damage and low cost are the main directions for the development of fracturing fluid. As a thickener for water-based fracturing fluid, hydroxypropyl guar gum has the characteristics of strong thickening ability, good shear resistance, good thermal stability, and strong fluid loss control ability, so it is widely used in domestic oil and gas field fracturing . [0003] The hydroxypropyl guar g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
CPCC09K8/685
Inventor 李小红刘培松张治军章子锋潘浩
Owner 河南海博瑞硅材料科技有限公司
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