A kind of modified epoxy asphalt particle, water-in-oil drilling fluid and preparation method thereof

A technology of epoxy asphalt and modified asphalt, applied in the processing of tar asphalt/petroleum asphalt/natural asphalt, chemically processing tar asphalt/petroleum asphalt/natural asphalt, chemical instruments and methods, etc. The problems of poor high temperature resistance, complex asphalt process, and increased filtration loss can improve the overall mechanical properties, improve rock-carrying capacity, and increase compatibility.

Active Publication Date: 2022-03-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] According to the existing technology, the process of preparing high softening point asphalt is complicated and costly, and the oil solubility of asphalt particles is high in the process of applying water-in-oil drilling fluid, and the drilling fluid system lacks effective asphalt particles to carry out the formation of pores and fractures. Plugging, increasing the fluid loss, poor suspension ability and high temperature resistance, etc., the invention provides a modified epoxy asphalt particle, water-in-oil drilling fluid and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 400g of vacuum residue with a softening point of 36.6°C was heated to a molten state in a reactor, 22.5g of maleic anhydride was added, and N 2 Keep the pressure of the reactor at 1.2 MPa, and react at 155° C. for 3.5 hours to obtain grafted activated pitch.

[0068] Using a rubber crusher, crush 46g of SBR into particles with an average particle size of less than 1cm, add it to 32g of naphthenic oil at 125°C, and stir for 60min to obtain the SBR mother liquor. Add the obtained SBR mother liquor to the grafted activated asphalt, stir at 130°C for 40 minutes, then add 1.4g of p-quinonedioxime, and stir for 45 minutes to obtain the modified asphalt. At 115°C, add 18.5g of polyethylene glycol 400 and stir for 20min, add 72.5g of hexadecyldimethyl tertiary amine and continue stirring for 10min, then add 110.5g of CYD-128 epoxy resin, and keep the temperature at 135°C After 5.5 hours, the modified epoxy asphalt was obtained by cooling.

[0069] The obtained modified epoxy ...

Embodiment 2

[0072] Heat 400g of oxidized asphalt with a softening point of 50.2°C in a reactor until it melts, add 38.6g of polyoxalic anhydride, and pass through N 2 Keep the pressure of the reactor at 1.6 MPa, and react at 160° C. for 5.0 hours to obtain grafted activated pitch.

[0073] Use a rubber crusher to crush 38g of SBR into particles with an average particle size of less than 1cm, add 35g of vacuum-extracted oil at 140°C, and stir for 90min to obtain the SBR mother liquor. The obtained SBR mother liquor was added to the grafted activated asphalt, stirred at 160°C for 45 minutes, then 2.6 g of 4,4-dibenzoylquinone dioxime was added, and stirred for 70 minutes to obtain modified asphalt. At 145°C, add 32.5g of polypropylene glycol 400 and stir for 30 minutes, add 65.6g of octadecyldimethyl tertiary amine and continue stirring for 15 minutes, then add 96.7g of CYD-128 epoxy resin, and keep the temperature at 135°C for 6.5 hours , cooling to obtain modified epoxy asphalt.

[0074...

Embodiment 3

[0077] Heat 400g of oxidized asphalt with a softening point of 61.6°C in the reactor until it melts, add 62.4g of polyglutaric anhydride, and pass through N 2 Keep the pressure of the reactor at 1.2 MPa, and react at 165° C. for 4.5 hours to obtain grafted activated pitch.

[0078] Use a rubber crusher to crush 32g of SBR into particles with an average particle size of less than 1cm, add 42g of vacuum-extracted oil at 130°C, and stir for 100min to obtain the SBR mother liquor. Add the obtained SBR mother liquor into the grafted activated asphalt, stir at 170°C for 30 minutes, then add 3.8g of 4,4-dibenzoylquinone dioxime (DGM), and stir for 80 minutes to obtain modified asphalt. At 140°C, add 41.3g of polyethylene glycol 400 and stir for 40min, add 89.8g of coco-based 1,3-propylenediamine and continue stirring for 15min, then add 126.8g of CYD-128 type epoxy resin, at 130°C Lower the constant temperature for 8.0 hours, and cool to obtain modified epoxy asphalt.

[0079] The ...

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Abstract

The invention discloses a modified epoxy asphalt particle, a water-in-oil base drilling fluid and a preparation method thereof. The components of the modified epoxy asphalt particles of the present invention include: modified asphalt, epoxy resin, and curing agent, wherein the components of the modified asphalt include: matrix asphalt, organic acid anhydride, SBR mother liquor, and crosslinking agent. The modified epoxy asphalt particle of the present invention not only has a small particle size, but also has a certain elastic deformation ability, and has excellent high temperature resistance. The drilling fluid has good rheological properties and high temperature and high pressure fluid loss reduction effect when used at high temperature.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling and production, and in particular relates to a modified epoxy asphalt particle, a water-in-oil base drilling fluid and a preparation method thereof. Background technique [0002] With the gradual development of oil and gas exploration to deep layers, the chances of drilling high-temperature and high-pressure formations are gradually increasing. All of these put forward higher requirements on the drilling fluid system. Compared with water-based drilling fluid, oil-based drilling fluid has strong anti-pollution ability, good lubricity, strong inhibition, is conducive to maintaining the stability of the well wall, can protect oil and gas layers to the greatest extent, and is easy to maintain. The excellent high-temperature stability and inhibition of oil-based drilling fluid make it more advantageous in drilling complex wells, especially high-temperature deep wells and water-sensitive for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L87/00C08L63/00C08L9/06C08L91/00C08G81/00C10C3/02C08J3/24C09K8/36
CPCC08J3/246C09K8/36C08G81/00C10C3/026C09K2208/12C08J2395/00C08J2387/00C08J2463/00C08J2409/06C08J2491/00
Inventor 傅丽郭皎河李志军张建峰刘树华刘成郭小圣
Owner CHINA PETROLEUM & CHEM CORP
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