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Amphoteric graphene oxide plugging anti-slump agent, preparation method and application
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A technology for plugging and anti-slumping and graphene, which is applied in the field of amphoteric graphene oxide plugging and anti-slumping agent, water-based drilling fluid plugging and anti-slumping agent, and the field of preparing amphoteric graphene oxide plugging and anti-slumping agent. Solve the problems of limited temperature resistance, unfavorable underground construction, limited application occasions, etc., to achieve the effect of long duration and strong temperature resistance
Active Publication Date: 2022-03-25
CHINA UNIV OF PETROLEUM (EAST CHINA)
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[0007] The purpose of the present invention is to overcome that the plugging and anti-slumping agent in the prior art is a single physical plugging and cannot be tightly adsorbed on the shale surface. The duration of the plugging effect is short, which is not conducive to underground construction, and is limited by the temperature resistance. Disadvantages of limited application
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specific Embodiment approach 1
[0026] The polymerizable siloxane modifier is a combination of vinyltriethoxysilane and vinyltrimethoxysilane in a weight ratio of 1:(1-2).
specific Embodiment approach 2
[0028] The polymerizable siloxane modifier is a combination of methylvinyldiethoxysilane and methylvinyldimethoxysilane in a weight ratio of 1:(1-2).
[0029] Preferably, in step (1), the double bond-containing reaction monomer is selected from at least one of methyl methacrylate, methyl acrylate and tert-butyl acrylate.
[0030] Preferably, in step (1), the templating agent is polystyrene; preferably, the polystyrene is microspherical particles with an average particle size of 500 nm. The average particle diameter of the polystyrene of the microspherical particles of the present invention is determined according to a particle size analyzer.
[0031] Preferably, the templating agent is used in excess relative to the amount of graphene oxide, for example, the amount of the templating agent and the graphene oxide is used in a weight ratio of 1-4:1, preferably 1-2.5:1.
[0032] Preferably, in step (1), the conditions of the contact reaction include: a temperature of 5-40° C. and...
specific Embodiment approach 3
[0041] Based on the total weight of the solvent, the templating agent, the polymerizable siloxane modifier, the double bond-containing reactive monomer and the material B, the polymerizable siloxane modified The dosage of the agent is 1-20 wt %, and the dosage of the double bond-containing reaction monomer is 1-10 wt %.
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Abstract
The invention relates to the field of oil field chemistry, in particular to an amphoteric graphene oxide plugging and anti-slump agent and its preparation method and application. The method comprises: (1) in the presence of a solvent, mixing a template agent, a polymerizable The reaction monomer of double bond carries out contact reaction, obtains material A, wherein said reaction monomer containing double bond is acrylic ester monomer; (2) in the presence of initiator, the material A is mixed with The material B is subjected to a polymerization reaction to obtain a material C; (3) the material C is subjected to template removal treatment. The amphoteric graphene oxide of the present invention tightly seals the shale surface, has a long duration of plugging efficiency, and has strong temperature resistance, and can achieve the purpose of long-term plugging.
Description
technical field [0001] The invention relates to the field of oil field chemistry, in particular to a method for preparing an amphoteric graphene oxide plugging and anti-slump agent, the amphoteric graphene oxide plugging and anti-slumping agent prepared by the method, and its use in a water-based drilling fluid plugging and anti-slumping agent Applications. Background technique [0002] In recent years, with the increasing number of deep wells and ultra-deep wells, the downhole situation has become more and more complicated. The problem of wellbore instability is mainly concentrated in mud shale formations and fractured formations. The hydration inhibition ability and effective plugging ability of the existing drilling fluid treatment agents and systems are far from the requirements. The inhibition and plugging performance of the drilling fluid puts forward higher requirements. [0003] The pore throat size of mud shale is less than 100 nm, and the hard brittle mud shale t...
Claims
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Application Information
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