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Modified epoxy asphalt particles, water-in-oil drilling fluid and preparation method thereof

An epoxy bitumen and drilling fluid technology, applied in chemical instruments and methods, drilling compositions, building components, etc., can solve the problems of increased fluid loss, high cost, and high oil solubility, and achieve increased deformability. , Improve the performance, improve the effect of high temperature resistance

Active Publication Date: 2021-04-06
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 asphalt particles to effectively seal formation channels and fractures blockage, increase 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

[0056] Heat 300g of residual oil with a softening point of 38.6°C to 125°C in an asphalt reactor, and pass N 2 Keep the pitch reactor pressure at 1.0 MPa, add 54.2g hexadecyl dimethyl tertiary amine and 0.10g DMP-30 and stir evenly, then add 76.5g CYD-128 type epoxy resin, continue stirring for 20 minutes to obtain ring Oxygen asphalt; put 120g of sulfur powder in a closed sulfur reactor, heat to 280°C, add 0.12g of isoprene after 40 minutes, and feed N 2 Keep the pressure at 1.5MPa. After the sulfur polymerization reaction is completed, open the valve of the reaction kettle at the same time, spray the two liquids into the contact tower, the molten sulfur enters from the upper part of the tower, and the molten epoxy asphalt enters from the lower part of the tower, so that the two are fully contacted in countercurrent to maintain 35 minutes. Open the discharge valve at the bottom of the contact tower, quickly spray the liquid into the quenching liquid containing 0.16g of 6-ch...

Embodiment 2

[0059] 260g of residual oil with a softening point of 43.2°C was heated to 130°C in an asphalt reactor, and N 2 Keep the asphalt reactor pressure at 1.2MPa, add 31.2g coco-based 1,3-propylenediamine and 0.08g DDM and stir evenly, then add 49.4g E-44 type epoxy resin, continue to stir for 20 minutes to obtain ring Oxygen pitch; put 135g of sulfur powder in a closed sulfur reactor, heat to 300°C, add 0.16g of hexachloro-p-xylene after 60 minutes, and feed N 2 Keep the pressure at 1.8MPa. After the sulfur polymerization reaction is completed, open the valve of the reaction kettle at the same time, spray the two liquids into the contact tower, the molten sulfur enters from the upper part of the tower, and the molten epoxy asphalt enters from the lower part of the tower, so that the two are fully contacted in countercurrent to maintain 40 minutes. Open the discharge valve at the bottom of the contact tower, quickly spray the liquid into the quenching liquid containing 0.10g of is...

Embodiment 3

[0062] Heat 380g of oxidized asphalt with a softening point of 50.6°C to 140°C in an asphalt reactor, and pass N 2 Keep the asphalt reactor pressure at 1.5MPa, add 35.5g hydrogenated tallow propylene diamine and 0.10g DDM and stir evenly, then add 45.6g CYD-128 type epoxy resin, continue to stir for 10 minutes, obtain epoxy asphalt; Put 95g of sulfur powder in a closed sulfur reactor, heat it to 310°C, add 0.12g of 1-octadecene after 55 minutes, and feed N 2 Keep the pressure at 1.6MPa. After the sulfur polymerization reaction is completed, open the valve of the reaction kettle at the same time, spray the two liquids into the contact tower, the molten sulfur enters from the upper part of the tower, and the molten epoxy asphalt enters from the lower part of the tower, so that the two are fully contacted in countercurrent to maintain 35 minutes. Open the discharge valve at the bottom of the contact tower, quickly spray the liquid into the quenching liquid containing 0.15g of 4...

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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 modified epoxy asphalt particles include a core made of epoxy asphalt and a shell formed by a modifier. In parts by mass, the core is 7-9 parts, and the shell is 1-3 parts; the modifier includes Polymerized sulfur and free sulfur, the weight ratio of polymerized sulfur and free sulfur in the modifier is 3:7~7:3. The water-in-oil-based drilling fluid, in terms of mass fraction, includes 0.5% to 5% of the main emulsifier, 0.1% to 3% of the auxiliary emulsifier, 1% to 3% of organic soil, and 1% to 5% of modified epoxy asphalt particles. %, the balance is oil-water base. The water-in-oil drilling fluid of the present invention uses modified epoxy asphalt particles as a performance regulator, which can maintain a good particle state and high-temperature deformation ability in the water-in-oil drilling fluid, and improves plugging and fluid loss reduction Effect.

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 and a preparation method thereof, and a water-in-oil base drilling fluid using the modified epoxy asphalt particle as a performance regulator. 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 comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C09K8/36C08L95/00C08L63/00C08K3/06
CPCC08L95/00C08L2201/08C09K8/035C09K8/36C08L63/00C08K3/06
Inventor 傅丽姚汉荣李志军郭皎河刘树华张建峰
Owner CHINA PETROLEUM & CHEM CORP
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