Preparation method of environmental-friendly demulsify-cleanup additive for fracture acidizing

A demulsification aid, fracturing and acidizing technology, applied in chemical instruments and methods, earthwork drilling, drilling composition, etc., can solve the problem of complex composition, long preparation time, and no technical advantages of product performance indicators. and other problems, to achieve the effect of convenient addition and good drainage performance.

Inactive Publication Date: 2012-08-01
RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese Patent Application No. 201010251665.1 discloses "a new type of demulsification aid and drainage agent", and its formula consists of: penetrating agent, pesticide wetting agent, fracturing demulsification aid and drainage agent, fluorocarbon surfactant, sodium formate,

Method used

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  • Preparation method of environmental-friendly demulsify-cleanup additive for fracture acidizing
  • Preparation method of environmental-friendly demulsify-cleanup additive for fracture acidizing
  • Preparation method of environmental-friendly demulsify-cleanup additive for fracture acidizing

Examples

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Example Embodiment

[0019] The preparation method of the environmentally friendly demulsification aid for fracturing acidification is characterized in that: the environmentally friendly demulsification aid for fracturing acidification is configured in the following proportions:

[0020] 100 parts of environmentally friendly demulsification aid for fracturing acidification is composed of 20-25 parts of biological demulsifier SWP, 10-15 parts of alkyl polyglycosides, 20-30 parts of low molecular alcohol, and the balance is water. (The proportions of the above components are all parts by weight)

[0021] The preparation method of the environmentally friendly demulsification aid for fracturing acidification is characterized in that: the environmentally friendly demulsification aid for fracturing acidification is configured according to the following steps:

[0022] Step 1), take 10 to 15 parts of alkyl polyglycoside and add 20 to 30 parts of low molecular alcohol, stir at room temperature, and dissolve unif...

Example Embodiment

[0025] Example 1

[0026] The biological demulsifier SWP is a fermentation product produced by Pseudomonas aeruginosa using different carbon sources, which will not cause harm to microorganisms, animals and humans. This product is produced and provided by Huzhou Zijin Biotechnology Co., Ltd.

[0027] Alkyl polyglycosides are commercially available products with carbon numbers between 12-14. The product is synthesized from renewable resources natural fatty alcohol and glucose. It is a new type of nonionic surfactant with comprehensive performance. It has the characteristics of ordinary nonionic and anionic surfactants. It has high surface activity and good ecological safety. With compatibility, it is internationally recognized as the first choice "green" functional surfactant.

[0028] Take 10 grams of alkyl polyglycoside and dissolve it in 20 grams of ethanol, stir at room temperature, and dissolve uniformly; then add 20g of biological demulsifier SWP, and stir well; finally add 50 ...

Example Embodiment

[0029] Example 2

[0030] The configuration process of this example is basically the same as that of Example 1. The difference is that 15g of alkyl polyglycoside is dissolved in 30g of ethanol and stirred evenly, then 25g of biological demulsifier SWP is added, and the mixture is evenly stirred. Finally, 30g of water is added and stirred evenly. Make 100g of biodegradable environmentally friendly demulsification aid.

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Abstract

The invention provides a preparation method of an environmental-friendly demulsify-cleanup additive for fracture acidizing and is characterized in that the environmental-friendly demulsify-cleanup additive for fracture acidizing is prepared according to the following proportion in parts by weight (the unit is gram): 100 parts of environmental-friendly demulsify-cleanup additive for fracture acidizing comprise 20-25 parts of biological de-emulsifier SWP, 10-15 parts of alkyl polyglucosides, 20-30 parts of low-molecular alcohol and residual amount water. The environmental-friendly demulsify-cleanup additive for fracture acidizing belongs to pure green degradable substance, has no pollution to the environment, has the surface tension of 27.17 mN/m and the interfacial tension of 0.6640 mN/m and has better cleanup performance; the demulsification rate of the demulsify-cleanup additive is more than 90%, oil water emulsion can be radically demulsified and separated, and meanwhile, the demulsify-cleanup additive is multipurpose and can be conveniently added on site.

Description

technical field [0001] The invention relates to the field of fracturing technology in oil and gas fields, and relates to a preparation method of an environment-friendly demulsification aid and drainage agent for fracturing acidification. Background technique [0002] For low-pressure and low-permeability reservoirs, fracturing is the main measure to put new wells into production and tap the potential of old wells to increase production. Fracturing fluids with poor performance can easily cause reservoir damage such as water sensitivity, water lock, and emulsification plugging, which will reduce the permeability of the reservoir and affect the stimulation effect. Adding demulsifiers and drainage aids with good performance to the fracturing fluid can prevent the fracturing fluid from causing water lock damage and emulsification blockage to the reservoir, and improve the effect of reservoir stimulation. The main component of the demulsification aid is surfactant. Because the su...

Claims

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Application Information

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IPC IPC(8): C09K8/74E21B43/26E21B43/27
Inventor 高瑞民雷晓岚吴金桥段玉秀何静张军涛高志亮朱容婷乔红军梁小兵
Owner RES INST OF SHAANXI YANCHANG PETROLEUM GRP
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