Xanthan gum non-crosslinking fracturing fluid as well as preparation method and application thereof

A xanthan gum and non-cross-linking technology, applied in chemical instruments and methods, earthwork drilling, mining fluids, etc., can solve the problems of fracture conductivity damage, high cost of water-based guar gum fracturing fluid, formation damage, etc.

Active Publication Date: 2013-10-23
北京世纪中星能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since China does not produce plant-based guar gum, manufacturers of modified guar gum rely on imported raw materials, resulting in high cost of water-based guar gum fracturing fluid
Moreover, the water-based guar gum cross-linked fracturing fluid has the problem that the proppant in the fracturing fluid sinks due to heat and cannot be restored to suspension at a formation temperature of 60°C or above, so that the sand-carrying capacity is not high. After bonding, there will be problems such as difficult gel breaking at low temperature and unstable cross-linking at high temperature, and the filter cake formed by the fracturing fluid after cross-linking will damage the fracture conductivity, resulting in a decrease in permeability and further damage to the formation by residual gel. Limiting the application of water-based guar gum fracturing fluid

Method used

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  • Xanthan gum non-crosslinking fracturing fluid as well as preparation method and application thereof
  • Xanthan gum non-crosslinking fracturing fluid as well as preparation method and application thereof
  • Xanthan gum non-crosslinking fracturing fluid as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] formula:

[0035]

[0036] Among them, the bactericide is paraformaldehyde; the clay stabilizer is potassium chloride; the demulsifier is OP-10; the drainage aid is a fluorosurfactant compound; the gel breaker is ammonium persulfate; For ferric chloride. Among them, OP-10 is a mixture that is a compound of alkylphenol polyoxyethylene ether.

[0037] Preparation:

[0038] (1) Add xanthan gum, gel breaker and clay stabilizer solid powder of formula quantity in 20 kilowatts dry powder mixing equipment, obtain uniform powder after mixing 8 hours;

[0039] (2) The above powder is formulated into an aqueous solution according to the designed capacity to obtain the first solution;

[0040] (3) The bactericide is prepared as a bactericide solution with a mass concentration of 0.05%, stirred at 900 rpm for 3 hours, and the bactericide solution is added to the solution obtained in step (2) at a speed of 13 milliliters / second In, obtain the second solution;

[0041] (4) Th...

Embodiment 2

[0047] formula:

[0048]

[0049] Among them, the bactericide is paraformaldehyde; the clay stabilizer is potassium chloride; the demulsifier is OP-10, the drainage aid is a fluorosurfactant compound, and the gel breaker is ammonium persulfate;

[0050] Preparation:

[0051] (1) Add xanthan gum, gel breaker and clay stabilizer solid powder of formula quantity in 20 kilowatts dry powder mixing equipment, obtain uniform powder after mixing 8 hours;

[0052] (2) The above powder is formulated into an aqueous solution according to the designed capacity to obtain the first solution;

[0053] (3) The bactericide is prepared as a 0.1% bactericide solution with a mass concentration, stirred at 900 rpm for 3 hours, and the bactericide solution is added to the solution obtained in step (2) with a speed flow of 13 milliliters / second In, obtain the second solution;

[0054] (4) The demulsifier is prepared as a solution with a mass concentration of 0.5%, and the demulsifier solution is...

Embodiment 3

[0059] formula:

[0060]

[0061] Among them, the bactericide is paraformaldehyde; the clay stabilizer is potassium chloride; the demulsifier is OP-10, the drainage aid is a fluorosurfactant compound, and the gel breaker is ammonium persulfate;

[0062] Preparation:

[0063] (1) Add xanthan gum and gel breaker of formula quantity in 20 kilowatt dry powder mixing equipment, obtain uniform powder after mixing for 8 hours;

[0064] (2) The above powder is formulated into an aqueous solution according to the designed capacity to obtain the first solution;

[0065] (3) The bactericide is prepared as a bactericide solution with a mass concentration of 0.05%, stirred at 900 rpm for 3 hours, and the bactericide solution is added to the solution obtained in step (2) with a speed of 13 milliliters / second In, obtain the second solution;

[0066] (4) The demulsifier is prepared as a solution with a mass concentration of 0.5%, and the demulsifier solution is added to the second solut...

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Abstract

The invention provides xanthan gum fracturing fluid, and a preparation method and application thereof. The xanthan gum fracturing fluid comprises xanthan gum and auxiliary additives. The xanthan gum fracturing fluid has the advantages of high viscosity and high sand-carrying capacity, and can serve as large-dose 'quick water' and 'prepad fluid' in the fracturing process or serve as sand-carrying fluid in the fracturing process.

Description

technical field [0001] The invention relates to a fracturing fluid for oil and gas field reservoir reconstruction, in particular to a xanthan gum non-crosslinked fracturing fluid, its preparation method and application. Background technique [0002] Fracturing fluid plays an important role in oil and gas field development and reservoir transformation. Its main working principle is: using high-pressure and large-displacement pumps, using the principle of liquid pressure transmission, injecting fracturing fluid into oil layers at high pressure, and gradually increasing the pressure in the wellbore. When the pressure is higher than the in-situ stress near the well wall and the tensile strength of the formation rock, fractures will be generated in the formation near the bottom of the well: continue to inject fracturing fluid, and the fractures will extend forward and The proppant is filled to form a sand-filled fracture with a certain geometric size and high conductivity in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/68E21B43/26
Inventor 周国君徐波翔
Owner 北京世纪中星能源技术有限公司
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