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High-temperature-resistant xanthan gum fracturing fluid and preparation method thereof

A technology of xanthan gum and fracturing fluid, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of viscoelastic performance decline, sand screening, insufficient sand-carrying ability, etc., and achieve good sand-carrying performance, Effect of improving heat resistance and shear resistance

Inactive Publication Date: 2017-06-06
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when xanthan gum is used as fracturing fluid, its performance in low temperature wells (T80°C), its temperature resistance and shear resistance are not ideal, and its viscoelastic properties It will be greatly reduced, resulting in the problem of insufficient sand-carrying capacity or even screen-out when used in high-temperature wells

Method used

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  • High-temperature-resistant xanthan gum fracturing fluid and preparation method thereof
  • High-temperature-resistant xanthan gum fracturing fluid and preparation method thereof
  • High-temperature-resistant xanthan gum fracturing fluid and preparation method thereof

Examples

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Effect test

Embodiment 1

[0044] This embodiment provides a kind of instant heat-resistant xanthan gum fracturing fluid, which is composed of the following components:

[0045] 0.5 parts by weight of xanthan gum; 0.2 parts by weight of temperature stabilizer (calcium chloride); 0.5 parts by weight of clay stabilizer (potassium chloride); 0.5 parts by weight of demulsification aid drainage agent (DL-12 type surfactant); 0.02 parts by weight of gel breaker (ammonium persulfate); 100 parts by weight of water.

[0046]The instant high temperature resistant xanthan gum fracturing fluid is prepared according to the following steps:

[0047] (1) under stirring condition, add xanthan gum in water, then stir 3min, obtain the instant xanthan gum aqueous solution that thickens rapidly;

[0048] (2) the temperature stabilizer is made into a high-concentration aqueous solution, under stirring conditions, the aqueous solution of the temperature stabilizer of formula quantity is added in the described xanthan gum aq...

Embodiment 2

[0052] This embodiment provides a kind of instant heat-resistant xanthan gum fracturing fluid, which is composed of the following components:

[0053] 0.6 parts by weight of xanthan gum; 0.5 parts by weight of temperature stabilizer (calcium chloride); 1 part by weight of clay stabilizer (potassium chloride); 1 part by weight of demulsification aid drainage agent (DL-12 type surfactant); 0.04 parts by weight of gel breaker (ammonium persulfate); 100 parts by weight of water.

[0054] The instant high temperature resistant xanthan gum fracturing fluid is prepared according to the following steps:

[0055] (1) under stirring condition, add xanthan gum in water, then stir 3min, obtain the instant xanthan gum aqueous solution that thickens rapidly;

[0056] (2) the temperature stabilizer is made into a high-concentration aqueous solution, under stirring conditions, the aqueous solution of the temperature stabilizer of formula quantity is added in the described xanthan gum aqueous...

Embodiment 3

[0060] This embodiment provides a kind of instant heat-resistant xanthan gum fracturing fluid, which is composed of the following components:

[0061] 0.5 parts by weight of xanthan gum; 1 part by weight of temperature stabilizer (potassium formate); 0.5 parts by weight of clay stabilizer (potassium chloride); 0.7 parts by weight of demulsification aid drainage agent (DL-12 type surfactant); Glue (ammonium persulfate) 0.04 parts by weight; water 100 parts by weight.

[0062] The instant high temperature resistant xanthan gum fracturing fluid is prepared according to the following steps:

[0063] (1) under stirring condition, add xanthan gum in water, then stir 3min, obtain the instant xanthan gum aqueous solution that thickens rapidly;

[0064] (2) the temperature stabilizer is made into a high-concentration aqueous solution, under stirring conditions, the aqueous solution of the temperature stabilizer of formula quantity is added in the described xanthan gum aqueous solution...

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Abstract

The invention provides a high-temperature-resistant xanthan gum fracturing fluid and a preparation method thereof. The fracturing fluid comprises the following components in parts by weight: 0.4-0.6 part of xanthan gum, 0.2-2 parts of temperature stabilizer and 1.0-3.0 parts of other auxiliary additives. The temperature stabilizer (composed of calcium chloride, potassium formate and the like) is added to promote the transformation of the xanthan gum structure to the double spiral structure, thereby enhancing the temperature resistance and shear resistance; and thus, the xanthan gum still has favorable solid-carrying behavior under the conditions of high temperature and high shear.

Description

technical field [0001] The invention relates to the field of increasing production of oil and gas reservoirs, in particular to a high-temperature-resistant xanthan gum fracturing fluid and a preparation method thereof. Background technique [0002] With the continuous development of oil and gas reservoirs and the increasing demand for energy, unconventional oil and gas resources have become a hot spot in current exploration and development. Hydraulic fracturing, as an important measure to increase production of low-permeability, ultra-low-permeability and unconventional oil and gas reservoirs, is more and more widely used. In the process of fracturing construction, the performance of fracturing fluid is directly related to the success or failure of fracturing construction and the effect of post-fracture stimulation. Xanthan gum is a high-molecular polysaccharide produced by the fermentation of sugars by Xanthomonas bacteria. The molecules can be entangled to form a double h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/60C09K8/68C09K8/90
CPCC09K8/608C09K8/604C09K8/68C09K8/90C09K2208/26
Inventor 卢拥军张洪翟文邱晓惠王丽伟舒玉华方波刘双
Owner PETROCHINA CO LTD
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