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High-chelating-degree liquid state boron cross-linking agent for gugnidine glue fracturing fluid

The technology of guar gum fracturing fluid and cross-linking agent is applied in the directions of drilling compositions, chemical instruments and methods, which can solve the problems of complicated preparation and high cost of cross-linking agent, and achieves high chelation degree, low cost, and high cost. small amount of effect

Inactive Publication Date: 2015-02-18
RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The preparation of the crosslinking agent described in the above two patents is relatively complicated and the cost is relatively high

Method used

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  • High-chelating-degree liquid state boron cross-linking agent for gugnidine glue fracturing fluid
  • High-chelating-degree liquid state boron cross-linking agent for gugnidine glue fracturing fluid

Examples

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Effect test

Embodiment 1

[0023] Take 15g of neopentyl glycol and 10g of borax and add them to 75mL of water, and stir until the liquid is clear to make 100g of the high-chelating liquid boron crosslinking agent of the present invention. The boron crosslinking agent has no insoluble matter precipitated or frozen at minus 15°C. It is convenient for field construction of fracturing in low temperature weather, and is suitable for guar gum fracturing fluid system.

Embodiment 2

[0025] Take 20g of glyoxal and 10g of borax and add them to 70mL of water, and stir until the liquid is clear to make 100g of the high-chelating liquid boron cross-linking agent of the present invention. The boron cross-linking agent has no insoluble matter precipitation or freezing at minus 15°C, which is convenient It is suitable for guar gum fracturing fluid system for on-site construction of fracturing in low temperature weather.

Embodiment 3

[0027] Add 15g of mannose and 10g of borax into 75mL of water and stir until the liquid is clear to make 100g of the high-chelating liquid boron crosslinking agent of the present invention. The boron crosslinking agent has no insoluble matter precipitation or freezing at minus 15°C, which is convenient for low temperature Weather fracturing site construction, suitable for guar gum fracturing fluid system.

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Abstract

The invention discloses a high-chelating-degree liquid state boron cross-linking agent for gugnidine glue fracturing fluid and a preparation method. The preparation method for the high-chelating-degree liquid state boron cross-linking agent comprises respectively taking 10-20% of polyatomic alcohol or poly hydroxyaldehyde, 10% of borax and the balance water according to mass percentage; and evenly stirring and dissolving the materials at the room temperature. The boron cross-linking agent has the advantages of being simple in preparation process, low in cost, stable in quality, free of undissolved substance precipitation or frost at subzero 15 DEG C and capable of facilitating fracturing site construction at low temperature. The borax is high in chelating degree, small in using amount and capable of being used after dilution and directly used so as to facilitate site construction.

Description

technical field [0001] The invention relates to a cross-linking agent, in particular to a formulation and a preparation method of a high-chelation-degree liquid boron cross-linking agent for guar gum fracturing fluid. It belongs to the field of oil and gas layer exploitation. Background technique [0002] Borax is cheap and easy to get, and it is the most commonly used crosslinking agent in guar gum fracturing fluid system. Borax has low solubility in water (at 10°C, the solubility is 1.6g / 100gH 2 O), and the lower the ambient temperature, the smaller the solubility and the slower the dissolution rate. Therefore, in field application, borax is generally formulated into a 0.4-1.0% aqueous solution for fracturing of oil and gas wells at 80 °C. The northern and southwestern regions of my country are rich in oil and gas resources, and the temperature is low in winter and spring. When preparing borax cross-linking liquid, there are problems such as slow liquid preparation, insu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/68
Inventor 高瑞民雷晓岚吴金桥朱容婷段玉秀乔红军李珮展转盈高志亮梁小兵
Owner RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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