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A kind of emulsified asphalt anti-collapse agent and preparation method thereof

A technology of emulsified asphalt and anti-slump agent, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of unusable and losing the function of sealing the well wall, etc., and achieve improved temperature resistance and strong stability , to meet the effect of borehole collapse prevention

Active Publication Date: 2020-11-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The commonly used emulsified asphalt is demulsified and fused with each other to form asphalt with a softening point of about 60°C. When the wellbore temperature exceeds 60°C, the connected asphalt will soften and flow, thus losing the effect of plugging the well wall. Cannot be used in deep wells with higher temperatures

Method used

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  • A kind of emulsified asphalt anti-collapse agent and preparation method thereof
  • A kind of emulsified asphalt anti-collapse agent and preparation method thereof
  • A kind of emulsified asphalt anti-collapse agent and preparation method thereof

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preparation example Construction

[0031] The embodiment of the present invention also provides a kind of preparation method of above-mentioned emulsified asphalt antislumping agent, comprises the following steps:

[0032] First react the epoxy resin with the curing agent to obtain a reaction product with a three-dimensional network structure;

[0033] The reaction product is then added to the emulsified bitumen.

[0034] For specific applications, put the epoxy resin in a container, slowly add the curing agent to the epoxy resin, and stir while adding to ensure that the epoxy resin and the curing agent fully react. The reaction time is about 30 minutes, and a three-dimensional The reaction product of the network structure, after the reaction is completed, slowly add the reaction product to the emulsified asphalt and stir while adding to ensure that the emulsified asphalt dissolves into the three-dimensional network viscous liquid formed by the reaction of epoxy resin and curing agent to form emulsified asphalt...

Embodiment 1

[0043]Using bisphenol A epichlorohydrin resin as epoxy resin, ethylenediamine as curing agent, according to the mass ratio of bisphenol A epichlorohydrin resin and ethylenediamine is 1:0.85, slowly add ethylenediamine into bisphenol A In the phenol A epichlorohydrin resin, stir while adding to ensure that the bisphenol A epichlorohydrin resin and ethylenediamine fully react. The reaction time is controlled at 30min. After the reaction is completed, the reaction product is slowly added to the emulsified asphalt. The amount is 5.0% of the mass of emulsified asphalt. Stir while adding to ensure that the emulsified asphalt is dissolved into the three-dimensional network viscous liquid formed by the reaction of bisphenol A epichlorohydrin resin and ethylenediamine. The stirring time is controlled at 40min to obtain emulsified asphalt Anti-slump agent. After sampling and demulsification, use an automatic asphalt softening point tester to test its softening point, and the softening p...

Embodiment 2

[0045] Novolac epoxy resin is used as epoxy resin, and ethylenediamine is used as curing agent. According to the mass ratio of novolac epoxy resin and ethylenediamine as 1:0.8, ethylenediamine is slowly added into novolac epoxy resin, while adding Stir to ensure that novolac epoxy resin and ethylenediamine fully react. The reaction time is controlled at 30 minutes. After the reaction is completed, slowly add the reaction product to the emulsified asphalt. The amount added is 4.5% of the mass of the emulsified asphalt. The asphalt is melted into the three-dimensional network viscous liquid formed by the reaction of novolac epoxy resin and ethylenediamine, and the stirring time is controlled at 40 minutes; an emulsified asphalt anti-slump agent is obtained. After sampling and demulsification, the softening point was tested with an automatic asphalt softening point tester, and the softening point was 137°C.

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Abstract

The invention discloses an emulsified asphalt anti-collapse agent and a preparation method thereof. The emulsified asphalt anti-collapse agent comprises epoxy resin, a curing agent and emulsified asphalt. The emulsified asphalt anti-collapse agent provided in the embodiment is characterized in that a reaction product with a three-dimensional network structure is generated through reaction of epoxyresin and the curing agent, and then emulsified asphalt is melted in the three-dimensional network structure. Owing to high stability of the three-dimensional network structure, thermal resistance ofthe prepared emulsified asphalt anti-collapse agent can be improved, and accordingly a softening point of asphalt after demulsification of emulsified asphalt can be raised to enable application in high-temperature deep wells. According to tests carried out through an automatic asphalt softening point tester, the asphalt softening point is raised from 60 DEG C to 150 DEG C or above after demulsification of emulsified asphalt, and accordingly the requirement of borehole collapse prevention in an oil drilling process can be met.

Description

technical field [0001] The invention relates to the technical field of oil field chemistry, in particular to an emulsified asphalt anti-collapse agent and a preparation method thereof. Background technique [0002] During the drilling process, in order to avoid phenomena such as wellbore collapse and borehole diameter shrinkage, operators need to use anti-slump agents to fill and block the pores of micro-cracks in the core to prevent water molecules from entering the core, thereby preventing clay from hydrating. The resulting swelling is dispersed, avoiding borehole wall collapse and borehole shrinkage. [0003] In related technologies, emulsified asphalt is usually selected as the anti-slump agent. The particle size distribution of emulsified asphalt is between a few nanometers and tens of microns. The cationic emulsifier is used to make it have a small amount of positive charge, which can be adsorbed in the cracks of the well wall mudstone and on the surface of the well w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
CPCC09K8/035
Inventor 王在明吴艳朱宽亮夏景生李云峰李路宽
Owner PETROCHINA CO LTD