Modified epoxy asphalt particles, full oil-based drilling fluid and preparation method thereof

A technology of epoxy asphalt and modified asphalt, applied in chemical instruments and methods, drilling composition, construction, etc., can solve the problems of poor suspension ability and high temperature resistance, complex asphalt technology, lack of effective plugging, etc. , to achieve good sealing, improve rock-carrying capacity, improve toughness and viscoelasticity

Active Publication Date: 2022-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] According to the existing technology, the process of preparing high softening point bitumen is complicated, and the oil solubility of bitumen particles is high in the process of applying full oil-based drilling fluid, and there is a lack of bitumen particles in the drilling fluid system to effectively block the formation channels and fractures, so that it can filter Increased loss, poor suspension ability and high temperature resistance, etc., the present invention provides a modified epoxy asphalt particle, full oil-based drilling fluid and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Heat 200g of vacuum residue with a softening point of 40.2°C to a molten state, add 28.6g of 60-mesh nitrile rubber powder and 7.5g of Vestenamer 8012, and react at 180°C for 60 minutes to obtain modified asphalt. Cool the obtained modified asphalt to 120°C, add 36.5g of methyl tetrahydrophthalic anhydride, 4.8g of dibutyl phthalate and 2.4g of 4,4-diaminodiphenylmethane and stir evenly, then add 52.6g of CYD- 128 type epoxy resin, continue to stir for 15 minutes, keep the temperature at 120°C for 5.0 hours, cool to obtain modified epoxy asphalt; grind the obtained modified epoxy asphalt at -25°C, and sieve to obtain modified epoxy asphalt particles.

[0052] Take 92 parts by weight of 3# white oil, add 2.5 parts by weight of polyoxyethylene laurate, stir at a high speed for 20 minutes at room temperature, add 1.5 parts by weight of organic soil, stir for 5 minutes, then add 4.0 parts by weight of the above-mentioned modified epoxy Asphalt particles, continue to stir f...

Embodiment 2

[0054] Heat 200g of oxidized asphalt with a softening point of 54.5°C to a molten state, add 37.4g of 80-mesh styrene-butadiene rubber powder and 10.2g of Vestenamer 8012, and react at 185°C for 80 minutes to obtain modified asphalt. Cool the obtained modified asphalt to 140°C, add 31.2g of methyl hexahydrophthalic anhydride, 11.6g of dioctyl phthalate and 3.7g of 4,4-diaminodiphenylmethane and stir evenly, then add 61.5g of CYD- 128 type epoxy resin, continue to stir for 20 minutes, keep the temperature at 135°C for 6.5 hours, cool to obtain modified epoxy asphalt; grind the obtained modified epoxy asphalt at -20°C, and sieve to obtain modified epoxy asphalt particles.

[0055] Take 90 parts by weight of 5# white oil, add 4.0 parts by weight of oleic acid polyoxyethylene ether, stir at a high speed for 15 minutes at room temperature, add 2.5 parts by weight of organic soil, stir for 10 minutes, and then add 3.5 parts by weight of the above-mentioned modified epoxy Asphalt pa...

Embodiment 3

[0057] Heat 200g of oxidized asphalt with a softening point of 59.7°C to a molten state, add 22.5g of 100-mesh neoprene rubber powder and 8.2g of Vestenamer 8012, and react at 190°C for 200min to obtain modified asphalt. Cool the obtained modified asphalt to 145°C, add 35.9g of methyl hexahydrophthalic anhydride, 8.2g of dibutyl phthalate and 0.9g of 4,4-diaminodiphenylmethane and stir evenly, then add 53.2g of E- 44-type epoxy resin, continue to stir for 30 minutes, keep the temperature at 130°C for 8.0 hours, cool to obtain modified epoxy asphalt; grind the obtained modified epoxy asphalt at -30°C, and sieve to obtain modified epoxy asphalt particles.

[0058] Take 93 parts of 5# white oil, add 1.5 parts of polyoxyethylene stearate, stir at a high speed for 15 minutes at room temperature, add 2.0 parts of organic soil, stir for 10 minutes, and then add 3.5 parts by weight of the above-mentioned modified epoxy asphalt particles , continue to stir for 25 minutes, add barite t...

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Abstract

The invention discloses a modified epoxy asphalt particle, a full oil base drilling fluid and a preparation method thereof. The composition of the modified epoxy asphalt particles includes modified asphalt, epoxy resin and curing agent, wherein the composition of the modified asphalt includes base asphalt, rubber powder and octene polymer rubber reactant. The full oil-based drilling fluid includes base oil, organic soil, emulsifier and the modified epoxy asphalt particles. The invention adopts the modified epoxy asphalt particles as the performance regulator, which can maintain a good particle state and high-temperature deformation ability in the full oil-based drilling fluid, and improves the effects of plugging and fluid loss reduction.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling and production, and in particular relates to modified epoxy asphalt particles, full oil-based 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. Oil-based drilling fluid has excellent high-temperature stability and inhibition, which makes it more obvious in drilling complex wells, especially in high-temperature deep wells and water-sensitive format...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C09K8/34
CPCC09K8/34C09K2208/12
Inventor 傅丽宁爱民郭皎河刘树华张建峰刘成郭小圣
Owner CHINA PETROLEUM & CHEM CORP
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