Environmentally friendly over-stable polyphase foam system and preparation method thereof

A foam system and stable technology, applied in the field of environment-friendly ultra-stable multi-phase foam system and its preparation, can solve the problems of poor environmental friendliness and degradability, electrochemical corrosion of pipelines and equipment, and low utilization efficiency of nanoparticles. To achieve the effect of effective utilization, good ecological security, good ecological security and compatibility

Active Publication Date: 2015-08-19
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently used alkylbenzene sulfonic acid or α-olefin sulfonate surfactants have great environmental protection pressure due to their poor environmental friendliness and degradability
Prolonging the liquid film drainage time by increasing the liquid phase viscosity can enhance the foam stability, but the added polymer foam stabilizer will pyrolyze under high temperature conditions, and the organic residues produced will cause damage to the formation to a certain extent; water soluble Non-toxic inorganic salts are another foam-stabilizing additive with the effect of stabilizing foam. The increase in electrolyte concentration can compress the electric double layer, thereby stabilizing the foam liquid film, but the addition of inorganic salts will cause electrochemical corrosion of pipelines and equipment; some hydrophobic Silica nanoparticles can also be used as a foam stabilizing agent, but there are disadvantages of poor system dispersion and low utilization efficiency of nanoparticles
Various foam systems currently used in oil exploration have defects such as poor environmental friendliness, unsatisfactory foam stability, hidden dangers of formation pollution, and poor dispersion of multi-phase systems. For a certain foam system, there are one defect or several defects at the same time exist

Method used

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  • Environmentally friendly over-stable polyphase foam system and preparation method thereof
  • Environmentally friendly over-stable polyphase foam system and preparation method thereof
  • Environmentally friendly over-stable polyphase foam system and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 0.25g alkyl glycoside, 0.003g C to 100mL deionized water 12 -3-C 12 2Br, 1.5g of hydrophilic silica nanoparticles, stirred with a high-speed mixer at 8000rpm for 3 minutes, and quickly transferred to a graduated 500mL measuring cylinder to produce about 430mL of foam with a drainage half-life of about 5000s.

Embodiment 2

[0023] The heterogeneous foam system is 100mL deionized water containing 0.1g surfactant alkyl glycoside APG, 0.020g cationic gemini surfactant C 12 -3-C 12 2Br and 1.2g of silica nanoparticles were stirred with a high-speed mixer at 8000rpm for 3 minutes, and quickly transferred to a graduated 500mL graduated cylinder to produce about 430mL of foam with a drainage half-life of about 5000s.

Embodiment 3

[0025] The heterogeneous foam system is 100mL deionized water containing 0.5g surfactant alkyl glycoside APG, 0.001g cationic gemini surfactant C 12 -3-C 12 2Br and 1g of silica nanoparticles were stirred with a high-speed stirrer at 8000rpm for 3 minutes, and quickly transferred to a graduated 500mL graduated cylinder to produce about 430mL of foam with a drainage half-life of about 5000s.

[0026] In order to further illustrate the stability of the multiphase foam system of the present invention, the present invention has done a large number of comparative experiments to illustrate the stability of the multiphase foam system of the present invention.

[0027] Take the heterogeneous foam system prepared in Example 1 as an example.

[0028] Use a foam scanner to study the change of foam shape, number, liquid content in foam, etc. over time, 0.003wt%C 12 -3-C 12 2Br+0.25wt%APG+1.5wt%SiO 2 , 25°C, nitrogen flow rate 400mL / min (eg figure 1 shown)

[0029] from figure 1 It ...

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Abstract

The invention relates to a preparation method of an over-stable polyphase foam system, and especially relates to an environmentally friendly over-stable polyphase foam system and a preparation method thereof. The foam system contains a biotype surfactant alkyl glucoside, a cationic gemini surfactant and silica nanoparticles, and the cationic gemini surfactant is C12-3-C12.2Br. The foam system has the advantages of good biocompatibility, good ecologic safety, great improvement of the foam stability, easy dispersion in the system by using hydrophilic nanometer, and easy preparation of foams. Only a very small amount of the cationic surfactant is needed by using the surfactant compounded system to foam, and the biotype surfactant alkyl glycoside massively used in the system are cheap and easily available.

Description

technical field [0001] The invention relates to a preparation method of an ultra-stable multi-phase foam system, in particular to an environment-friendly ultra-stable multi-phase foam system and a preparation method thereof. Background technique [0002] Foam fluid has the advantages of adjustable density, good compressibility, high viscosity, small frictional resistance, small amount of liquid, little damage to the reservoir, and strong solid particle carrying capacity. It is widely used in various process links of the petroleum industry, such as acidification, compression Cracking, plugging removal, water pressure cone, control and flooding, etc. Foaming agents used in foam systems are generally anionic surface or nonionic surfactants, and foam stabilizing aids are polymers such as polyacrylamide. The currently used alkylbenzene sulfonic acid or α-olefin sulfonate surfactants have great environmental protection pressure due to their poor environmental friendliness and deg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/38
CPCC09K8/38C09K2208/10
Inventor 王继乾薛国彬李兆敏徐海孙乾姜磊王栋李松岩
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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