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A kind of ultra-high eigenvalue three-phase flue gas foam for oil and gas fields and its preparation method

A technology of flue gas and eigenvalues, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of high cost of foam use and high cost of nanoparticle application, and achieve low cost, reduce industrial pollution sources, and stability enhanced effect

Active Publication Date: 2019-12-10
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current application cost of nanoparticles as a foam enhancer is still high, especially the application cost of nanoparticles that has been further increased by the hydrophilic and hydrophobic modification of the surface of nanoparticles.
In addition, when the added concentration of enhancer in the foaming liquid remains constant, the lower the foam characteristic value, the higher the liquid phase content in the foam, the greater the total amount of enhancer used, and the higher the use cost of the foam

Method used

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  • A kind of ultra-high eigenvalue three-phase flue gas foam for oil and gas fields and its preparation method

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Comparison scheme
Effect test

Embodiment 1

[0043] Example 1. Ultra-high eigenvalue three-phase flue gas foam for oil and gas fields

[0044] The raw materials are gas phase, liquid phase and solid phase, and the specific components are as follows:

[0045] The gas phase is the flue gas produced by the coal-fired power plant, which has undergone desulfurization, denitrification and deoxidation processes. The total fraction of nitrogen and carbon dioxide in the flue gas is ≈93%.

[0046] The maximum particle size of fly ash in the solid phase is 46 μm, the average particle size is 1.3 μm, SiO 2 Accounting for 63wt%, Al 6 Si 2 o 13 Accounting for 26wt%, Fe 2 o 3 The proportion is 6wt%, and the wetting angle of fly ash particles to distilled water is 57°; the average particle size of nano-silica in the solid phase is about 15nm, and the specific surface area is 160m 2 / g, the wetting angle of nano-silica particles to distilled water is 63°, and the mass ratio of fly ash to nano-silica particles is 8.5:1.

[0047] Th...

Embodiment 2

[0054] Example 2: Ultra-high eigenvalue three-phase flue gas foam for oil and gas fields

[0055] The raw materials are gas phase, liquid phase and solid phase, and the specific components are as follows:

[0056] The gas phase is the flue gas produced by the coal-fired power plant, which has undergone desulfurization, denitrification and deoxidation processes. The total fraction of nitrogen and carbon dioxide in the flue gas is ≈93%.

[0057] The maximum particle size of fly ash in the solid phase is 13 μm, the average particle size is 0.5 μm, SiO 2 Accounting for 71wt%, Al 6 Si 2 o 13 Accounting for 18wt%, Fe 2 o 3 The proportion is 3%, and the wetting angle of fly ash particles to distilled water is 54°; the average particle size of nano-silica in the solid phase is about 15nm, and the specific surface area is 160m 2 / g, the wetting angle of nano-silica particles to distilled water is 63°. - The mass ratio of fly ash to nano-silica particles is 8.5:1.

[0058] The m...

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Abstract

The disclosure discloses an ultra-dry three-phase flue gas foam for oil-gas fields and preparation method thereof. The ultra-dry three-phase flue gas foam is produced by a gas phase, a liquid phase and a solid phase; the gas phase is a flue gas; the foaming solution is an aqueous solution of a surfactant, a pH adjuster, and an inorganic salt; the solid phase is a composite of fly ash and nano silica; the foam quality is 90%-99%. The solid phase foam stabilizer is a compounded system of fly ash particles and nano silica particles, which is not only low in cost but also can form a stable solid particle adsorption layer on the foam film. Thus the instability of the foam such as film rupture, gas diffusion and bubble aggregation can be greatly reduced, and the stability of the foam can be effectively improved.

Description

technical field [0001] The invention relates to an ultra-high eigenvalue three-phase flue gas foam for oil and gas fields and a preparation method thereof, belonging to the technical field of oil and gas field development engineering. Background technique [0002] Foam is a kind of working fluid widely used in oil and gas field development industry at home and abroad. Because of its unique gas-liquid mixing structure, complex liquid film shape, and variable physical properties, it plays an irreplaceable role in petroleum engineering. It was rated as an efficient and intelligent fluid. At present, foam has been applied in almost the whole process of oil and gas development. In drilling and completion engineering, foam drilling fluid, foam completion fluid and foam fracturing fluid have been successfully applied; in oil production engineering, various types of nitrogen and carbon dioxide foam It is used in profile control, water plugging, oil displacement, acidizing and other...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/70C09K8/68C09K8/58C09K8/518C09K8/506C09K8/52
CPCC09K8/506C09K8/518C09K8/52C09K8/58C09K8/602C09K8/68C09K8/703C09K2208/10C09K8/38C09K8/594C09K8/94
Inventor 吕其超邵温琪张娟董朝霞林梅钦杨子浩刘洋郑嵘
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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