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Novel oil-based fracturing fluid and preparation method thereof

An oil-based fracturing technology, a new type of technology, is applied in the directions of chemical instruments and methods, drilling compositions, etc., and can solve the problems of complicated preparation steps of oil-based fracturing fluid gelling agent, high requirements for preparation conditions, complicated configuration process, etc. To achieve the effect of simple and easy preparation method, simple breaking of glue, and cost reduction

Inactive Publication Date: 2017-12-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Invention patent CN1204330 A discloses a phosphate aluminum oil-based fracturing fluid gelling agent and its preparation method, which contains dialkyl phosphate aluminum and toluene, and dialkyl phosphate aluminum contains short carbon chain alkyl (C 1 ~C 4 ), medium length carbon chain alkyl (C 6 ~C 10 ) and long carbon chain alkyl (C 12 ~C 18 ), its preparation steps are: (1) triethyl phosphate reacts with phosphorus pentoxide to generate polyphosphate intermediate; (2) mix polyphosphate intermediate with butanol, octanol, cetyl to octadecyl alcohol Alcohol reacts to generate dialkyl phosphate intermediate; (3) Dialkyl phosphate reacts with aluminum sulfate to generate dialkyl phosphate aluminum; (4) Add toluene solvent to make gelling agent, the oil-based fracturing fluid The gelling agent can form high-strength jelly in crude oil, which is suitable for continuous fracturing construction. However, the preparation steps of the oil-based fracturing fluid gelling agent are cumbersome and require a large number of chemical raw materials to undergo a series of complicated chemical reactions to produce Yes, the preparation conditions are high and the preparation time is long
Invention patent CN 103911136 A discloses an oil-based liquefied fracturing fluid thickener and its preparation method. In this invention, the fracturing fluid thickener is liquefied, and the fracturing efficiency is high, but the configuration process is still relatively complicated And it is difficult to break the glue
However, conventional oil-based fracturing fluids still have problems such as complicated preparation process and high cost.

Method used

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  • Novel oil-based fracturing fluid and preparation method thereof
  • Novel oil-based fracturing fluid and preparation method thereof
  • Novel oil-based fracturing fluid and preparation method thereof

Examples

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Embodiment 1

[0027] This embodiment provides a novel nano-silica gel oil-based fracturing fluid whose components and mass percentages are as follows: hydrophobic SiO with a particle size of 7nm 2 4% of nanoparticles and the balance of kerosene, the density of kerosene is 0.8g / cm 3 , the hydrophobic SiO 2 The surface group of nanoparticles is one of methyl, ethyl, propyl, and butyl

[0028] The preparation steps of the present invention are as follows: 4g hydrophobic SiO 2 Nanoparticles were added to 96g of kerosene, and mechanically stirred at a speed of 300 rpm for 20 minutes until the solution was uniform, and finally 100g of new nano-silica gel oil-based fracturing fluid was formed.

Embodiment 2

[0030] Different from Example 1, this example provides a new type of nano-silica gel oil-based fracturing fluid, whose components and mass percentages are as follows: Hydrophobic SiO with a particle size of 40nm 2 6% of nanoparticles and the rest of diesel oil, the density of diesel oil is 0.84g / cm 3 .

[0031] The preparation steps of the present invention are as follows: 6g hydrophobic SiO 2 Nanoparticles were added to 94g of diesel oil, mechanically stirred at 350 rpm for 25 minutes until the solution was uniform, and finally 100g of new nano-silica gel oil-based fracturing fluid was formed.

Embodiment 3

[0033] Different from Example 1, this example provides a new type of nano-silica gel oil-based fracturing fluid, whose components and mass percentages are as follows: Hydrophobic SiO with a particle size of 20nm 2 7% of nanoparticles and the rest of gasoline, the density of gasoline is 0.75g / cm 3 .

[0034] The preparation steps of the present invention are as follows: 7g hydrophobic SiO 2 Nanoparticles were added to 93g of gasoline, mechanically stirred at 400 rpm for 30 minutes until the solution was uniform, and finally 100g of new nano-silica gel oil-based fracturing fluid was formed.

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Abstract

The invention discloses a novel oil-based fracturing fluid. The novel oil-based fracturing fluid is prepared from raw material components in percentage by mass as follows: 4 %-7 % of nano-silica and the balance of an oil-soluble base solution. The oil-based fracturing fluid contains simple components, and various requirements of the oil-based fracturing fluid are met; a preparation method is simple, convenient and easy to implement, and gel breaking is simple, so that the purposes of simplifying the construction process and reducing the cost are achieved.

Description

technical field [0001] The invention belongs to the technical field of fracturing fluid preparation for oil and gas fields, and in particular relates to a novel oil-based fracturing fluid and a preparation method thereof. Background technique [0002] Fracturing is one of the important means to develop low-permeability oil and gas reservoirs. my country has abundant low-permeability oil and gas reserves, but it is difficult to develop low-permeability oil and gas reservoirs due to insufficient formation energy and low permeability. The use of fracturing methods can expand the oil flow channel and improve the formation permeability, so as to achieve the purpose of increasing production and injection. Fracturing fluid is known as the "blood" of fracturing. It is an important factor in determining the fracturing effect in the fracturing of oil and gas reservoirs. According to the different properties of oil and gas reservoirs, the common types of fracturing fluids in oilfields...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/64
CPCC09K8/64
Inventor 戴彩丽张跃吴一宁赵明伟李浩王若玙
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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