A kind of modified epoxy asphalt, water-based drilling fluid and preparation method thereof

A technology of water-based drilling fluid and epoxy asphalt, which is applied in the direction of chemical instruments and methods, drilling compositions, building components, etc., can solve the problems of drilling fluid plugging, anti-slumping, and reduction of fluid loss. Use performance, low asphalt softening point and other problems, to achieve the effect of improving the softening point and elastic deformability, improving the overall mechanical properties, and reducing the filtration loss.

Active Publication Date: 2022-01-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the existing technology, the process of preparing high softening point asphalt is complicated, and the asphalt products used in water-based drilling fluids have low softening points and large particles, and their dispersion performance in drilling fluids is not good. To solve problems such as preventing collapse, stabilizing the well wall, and reducing fluid loss, the invention provides a modified epoxy asphalt, water-based drilling fluid and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Heat 200g of vacuum residue with a softening point of 35.6°C in an asphalt reactor to a molten state, add 15.6g of maleic anhydride, and pass through N 2 Keep the pressure of the asphalt reactor at 1.2 MPa, and react at 155°C for 4.5 hours to obtain grafted activated asphalt. Add 6.4 g of SBS to the obtained grafted activated asphalt, shear at 180°C for 40 minutes, then add 0.26 g of sulfur, and stir for 240 minutes to obtain modified asphalt. Add 26.8 g of coco-based 1,3-propylenediamine and 12.6 g of dioctyl phthalate to the obtained modified asphalt at 135 ° C, stir for 5 minutes, then add 37.5 g of CYD-128 epoxy resin, continue Stir for 15 minutes, keep the temperature at 125°C for 6.5 hours, and cool to obtain modified epoxy asphalt.

[0061] Take 100g of the above-mentioned modified epoxy asphalt and add it to 150g of water, and at the same time add 4.2g of oleic acid polyoxyethylene ether and grind it with a small high-shear machine to obtain a modified epoxy as...

Embodiment 2

[0063] Heat 200g of oxidized asphalt with a softening point of 45.5°C in an asphalt reactor to a molten state, add 21.5g of polyisobutylene succinic anhydride, and pass through N 2 Keep the pressure of the asphalt reactor at 0.8 MPa, and react at 165° C. for 5.0 hours to obtain grafted activated asphalt. Add 7.5 g of SBS to the obtained grafted activated asphalt, shear at 185°C for 35 minutes, then add 0.38 g of sulfur, and stir for 200 minutes to obtain modified asphalt. Add 32.5 g of hexadecyl dimethyl tertiary amine and 9.8 g of dibutyl phthalate to the obtained modified asphalt at 140°C, stir for 10 min, then add 51.5 g of CYD-128 epoxy resin, and continue stirring for 20 min , kept the temperature at 135°C for 7.0 hours, and cooled to obtain modified epoxy asphalt.

[0064] Take 100g of the above-mentioned modified epoxy asphalt and add it to 120g of water, and at the same time add 3.8g of polyoxyethylene laurate and grind it with a small high-shear machine to obtain a m...

Embodiment 3

[0066] Heat 200g of dissolved and deasphalted asphalt with a softening point of 54.6°C in an asphalt reactor to a molten state, add 27.2g of polyglutaric anhydride, and pass through N 2 Keep the pressure of the asphalt reactor at 1.5 MPa, and react at 175° C. for 7.0 hours to obtain grafted activated asphalt. Add 5.6 g of SBS to the obtained grafted activated asphalt, shear at 180°C for 35 minutes, then add 0.58 g of sulfur, and stir for 270 minutes to obtain modified asphalt. Add 43.6g of octadecyldimethyl tertiary amine and 14.5g of dibutyl phthalate to the obtained modified asphalt at 130°C, stir for 10min, then add 57.5g of E-44 type epoxy resin, and continue stirring for 25min , kept the temperature at 135°C for 8.0 hours, and cooled to obtain modified epoxy asphalt.

[0067] Take 100g of the above-mentioned modified epoxy asphalt and add it to 180g of water, and at the same time add 4.5g of nonylphenol polyoxyethylene ether and grind it with a small high-shear machine t...

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Abstract

The invention discloses a modified epoxy asphalt, a water-based drilling fluid and a preparation method thereof. The components of the modified epoxy asphalt include modified asphalt, epoxy resin and curing agent, wherein the components of the modified asphalt include base asphalt, organic acid anhydride, SBS and crosslinking agent. The water-based drilling fluid includes base slurry and modified epoxy asphalt fluid, and the modified epoxy asphalt fluid includes modified epoxy asphalt and water. The modified epoxy asphalt of the invention not only has small particle size, high softening point, certain elastic deformation ability, but also 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, a water-based drilling fluid and a preparation method thereof. Background technique [0002] With the development of petroleum exploration and development, the drilling depth continues to deepen, the formations encountered become more and more complex, and the number of special craft wells such as directional wells and horizontal wells is gradually increasing. This makes drilling engineering put forward higher requirements on the performance of drilling fluid, especially the ability to resist high temperature. As an important drilling fluid treatment agent, asphalt products have good comprehensive effects such as anti-slumping, lubrication, reducing fluid loss and high temperature stability. However, the general softening point bitumen cannot meet the high-temperature operation requirements in deep wells due to exce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L51/00C08L63/00C08L53/02C08K3/06C08K5/40C08F289/00C08F222/06C08J3/24C09K8/24
CPCC08L95/00C08L51/00C08F289/00C08J3/246C09K8/24C08L2205/03C08J2395/00C08J2351/00C08J2453/02C09K2208/12C08L63/00C08L53/02C08K3/06C08K5/40C08F222/06
Inventor 傅丽郭皎河宁爱民张建峰刘树华郭小圣刘成
Owner CHINA PETROLEUM & CHEM CORP
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