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Organic titanium crosslinking agent, and preparation method and application method thereof

A technology of crosslinking agent and organic titanium, applied in the field of organic titanium crosslinking agent and its preparation, can solve the problems of formation damage, large residue content, reduced residue content, etc., and achieve the effect of less formation damage

Inactive Publication Date: 2013-05-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in the water-based fracturing process, inorganic boron or organic boron cross-linking agents are mainly used, and guar gum, konjac gum and their derivatives are used as thickeners. When the cross-linking agent is used, the residue content after gel breaking will be large, and it is easy to cause damage to the formation; when organic boron is used as the cross-linking agent, the residue content will be significantly reduced, but the temperature and shear resistance of the fracturing fluid will be lower. Obvious reduction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The organic titanium crosslinking agent is composed of 90 parts by mass of butyl titanate, 70 parts of triethanolamine and 70 parts of glycerin.

[0017] The preparation method of the organic titanium crosslinking agent is to add butyl titanate into the reaction kettle according to the above-mentioned mass fraction, heat to 60° C., add triethanolamine to the reaction kettle under stirring, react for 30 minutes, and then add glycerin, The reaction was carried out at 60°C for 150 minutes.

[0018] The method of using the organic titanium cross-linking agent is to mix the organic titanium cross-linking agent and the organic boron cross-linking agent in a mass ratio of 1:2 to obtain a mixture, and then add the mixture to the guar gum solution with a mass fraction of 0.3%, and stir. That is, the fracturing fluid is obtained, and the fracturing fluid is used for oil field fracturing, wherein the mass ratio of the mixture to the guar gum solution with a mass fraction of 0.3% i...

Embodiment 2

[0020] The organotitanium crosslinking agent is composed of 100 parts of butyl titanate, 80 parts of triethanolamine and 80 parts of glycerol in parts by mass.

[0021] The organic titanium cross-linking agent is to add butyl titanate into the reaction kettle according to the above mass fraction, heat to 80 ° C, add triethanolamine to the reaction kettle under stirring, and react for 30 minutes, then add glycerin, and heat it at 70 ° C. The reaction was carried out for 180 minutes.

[0022] The method of using the organic titanium cross-linking agent is to mix the organic titanium cross-linking agent and the organic boron cross-linking agent in a mass ratio of 0.8:2 to obtain a mixture, and then add the mixture to the konjac gum solution with a mass fraction of 0.3%. The fracturing fluid is obtained, which is used for oil field fracturing, wherein the mass ratio of the mixture to the konjac gum solution with a mass fraction of 0.3% is 0.8:100; the organic boron crosslinking ag...

Embodiment 3

[0031] The organic titanium cross-linking agent is composed of 110 parts of butyl titanate, 90 parts of triethanolamine and 90 parts of glycerin according to the parts by mass.

[0032] The preparation method of the organic titanium crosslinking agent is to add butyl titanate into the reaction kettle according to the above-mentioned parts by mass, heat to 70 ° C, add triethanolamine to the reaction kettle under stirring, react for 60 minutes, and then add glycerin, The reaction was carried out at 80°C for 150 minutes.

[0033] The method of using the organic titanium cross-linking agent is to mix the organic titanium cross-linking agent and the organic boron cross-linking agent in a mass ratio of 0.6:2 to obtain a mixture, and then add the mixture to the konjac gum solution with a mass fraction of 0.3%. The fracturing fluid is obtained, which is used for oil field fracturing; the mass ratio of the mixture to the konjac gum solution with a mass fraction of 0.3% is 1.1:100, and ...

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Abstract

The invention provides an organic titanium crosslinking agent, and a preparation method and application method thereof. The preparation method comprises the following steps: adding 90-110 parts by mass of tetrabutyl titanate into a reactor, heating to 60-80 DEG C, adding 70-90 parts of triethanolamine into the reactor while stirring, reacting for 30-60 minutes, adding 70-90 parts of glycerol, and reacting at 60-80 DEG C for 150-200 minutes. The application method comprises the following steps: mixing the organic titanium crosslinking agent with an organic boron crosslinking agent to obtain a mixture, adding the mixture into a 0.3 wt% guar gum solution or konjak gum solution, and stirring to obtain a fracturing fluid. The fracturing fluid prepared from the organic titanium crosslinking agent and organic boron crosslinking agent has the advantages of high temperature tolerance, high shearing resistance, low residue content and small damage to the stratum after viscosity breaking, and the like.

Description

technical field [0001] The invention relates to a cross-linking agent for oil field fracturing, in particular to an organic titanium cross-linking agent and a preparation method and use method thereof. Background technique [0002] At present, in the process of water-based fracturing, inorganic boron or organic boron cross-linking agent is mainly used, and guar gum, konjac gum and their derivatives are used as thickeners, but this technology has the following shortcomings: when inorganic boron is used as the cross-linking agent When organic boron is used as a cross-linking agent, the residue content after gel breaking will be very large, and it is easy to cause damage to the formation; when organic boron is used as a cross-linking agent, the residue content will be significantly reduced, but the temperature and shear resistance of the fracturing fluid will be reduced. Obvious reduction. SUMMARY OF THE INVENTION [0003] In order to overcome the problems in the prior art, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68
Inventor 马国艳沈一丁魏忠强王磊赖小娟杜媛
Owner SHAANXI UNIV OF SCI & TECH
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