Guar gum fracturing fluid nano crosslinking agent with good temperature resistance and preparation method thereof

A guar gum fracturing fluid, temperature-resistant technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of application limitation, viscosity drop, low cross-linking efficiency, etc., and achieve effective and economical fracturing construction , the network structure is huge and the effect of increasing the size of the crosslink

Active Publication Date: 2017-03-29
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] Due to the poor temperature resistance of boron-crosslinked guar gum fracturing fluid, the increase in temperature will lead to a rapid decrease in viscosity, which cannot meet the fracturing construction of medium-high temperature deep wells. Transition metal ions and organic metals have been rapidly developed as cross-linking agents. , however, transition metal ions also have the defect of cross-link

Method used

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  • Guar gum fracturing fluid nano crosslinking agent with good temperature resistance and preparation method thereof
  • Guar gum fracturing fluid nano crosslinking agent with good temperature resistance and preparation method thereof
  • Guar gum fracturing fluid nano crosslinking agent with good temperature resistance and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] A preparation method of a temperature-resistant guar gum fracturing fluid nano-crosslinking agent, comprising the following steps: adding 4 g of titanium tetrachloride to 100 mL of absolute ethanol, heating up to 40° C., stirring at a constant speed of 300 rpm for 0.5 h, Add 5 g of γ-aminopropyltriethoxysilane, then raise the temperature to 70°C, stir at a constant speed of 200 rpm for 2.5 h, raise the temperature to 80°C, continue stirring for 1 h, and cool to room temperature to obtain light yellow transparent guar gum Fracturing fluid nano-crosslinking agent.

[0022] like figure 1 As shown, the particle size of the nano-crosslinking agent prepared above was measured by a laser particle size tester to be about 2 nanometers.

[0023] Take 1 mL of the nano-crosslinking agent prepared above and add it to 100 mL of 0.3% guar gum solution and stir, as figure 2 As shown, the nano-crosslinking agent prepared above has a 6-min delayed cross-linking interval when used, and...

Embodiment 2

[0029] A preparation method of temperature-resistant guar gum fracturing fluid nano-crosslinking agent, comprising the following steps: adding 2 g of titanium tetrachloride to a mixed solution of 30 mL of absolute ethanol and 50 mL of glycerol, heating up to 40 ° C, Stir at a constant speed of 300 rpm for 0.5 h, add 4 g of γ-aminopropyltrimethoxysilane, then raise the temperature to 80°C, stir at a constant speed of 200 rpm for 4 h, and cool to room temperature to obtain light yellow transparent guar gum fracturing fluid nano crosslinking agent.

[0030] Take 1 mL of the nano-crosslinking agent prepared in Example 2 and add it to 100 mL of guar gum solution with a mass fraction of 0.3% and stir to compare the state of the guar gum solution at the initial stage of crosslinking and the state of the late stage of crosslinking. The performance is good, and the cross-linking effect is obvious. Take 100 mL of guar gum solution, add 20-40 mesh standard ceramsite, stir evenly, then a...

Embodiment 3

[0032] A preparation method of a temperature-resistant guar gum fracturing fluid nano-crosslinking agent, comprising the following steps: adding 4 g of titanium tetrachloride to a mixed solution of 50 mL of absolute ethanol and 50 mL of isopropanol, heating up to 40 ° C, Stir at a constant speed of 300 rpm for 0.5 h, add 5 g of N-aminoethyl-γ-aminopropyltrimethoxysilane, then raise the temperature to 70°C, stir at a constant speed of 200 rpm for 4 h, raise the temperature to 90°C, and continue stirring for 2 h, After cooling to room temperature, a light yellow transparent guar gum fracturing fluid nano-crosslinking agent is obtained.

[0033] Take 1 mL of the nano-crosslinking agent prepared in Example 3 and add it to 100 mL of guar gum solution with a mass fraction of 0.3% and stir to compare the state of the guar gum solution at the initial stage of crosslinking and the state of the late stage of crosslinking. The performance is good, and the cross-linking effect is obvious....

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Abstract

The invention discloses a preparation method of a guar gum fracturing fluid nano crosslinking agent with good temperature resistance. The method comprises the following steps: firstly adding inorganic titanium salt into a reaction medium at a temperature of 30 to 60 degrees centigrade, and stirring for 0.5 to 1 hour; and then adding an alkoxy silicon compound which contains reactive functional groups, and stirring for 2 to 8 hours at a temperature of 40 to 120 degrees centigrade to prepare the guar gum fracturing fluid nano crosslinking agent, wherein the mass ratio of the inorganic titanium salt to the alkoxy silicon compound to the reaction medium is 1 : (1 to 4) : (10 to 45). The preparation method disclosed by the invention is simple in preparation process, and ensures that the crosslinking time can be controlled by adjusting the loading capacity of titanium ions, the friction resistance between the fracturing fluid and borehole walls generated during construction can be reduced; and meanwhile, an organic-inorganic hybrid material with a larger spatial size structure can be formed by using the hydrolysis and self-polymerization functions of the alkoxy silicon compound, and thus the fracturing fluid with low concentration can achieve good temperature resistance.

Description

technical field [0001] The invention belongs to the technical field of oilfield chemical additives, and in particular relates to a guar gum fracturing fluid nano-crosslinking agent with good temperature resistance and a preparation method thereof. Background technique [0002] In my country's remaining oil reserves and proven natural gas geological reserves, low-permeability oil and gas resources account for more than 50% of the total oil and gas reserves. Low permeability and tight oil and gas reservoirs have the characteristics of wide distribution, high content, and many types. Due to the tight lithology, low permeability, low natural production rate and difficult exploitation of low permeability and tight oil and gas reservoirs, fracturing measures must be taken to increase productivity . Hydraulic fracturing is a technology widely used in low-permeability oil and gas fields to modify the seepage characteristics of oil layers. It mainly injects high-viscosity fracturing...

Claims

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Application Information

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IPC IPC(8): C09K8/68C09K8/90
CPCC09K8/685C09K8/887C09K8/905C09K2208/26
Inventor 李小红章子锋张治军杜静
Owner 河南海博瑞硅材料科技有限公司
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