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Modified epoxy asphalt particle and water-in-oil-based drilling fluid, and preparation methods thereof

A technology of epoxy asphalt and drilling fluid, which is applied in the direction of chemical instruments and methods, drilling compositions, building components, etc., can solve the problems of high oil solubility, increased filtration loss, high cost, etc., and improve high temperature resistance , increase the deformability, improve the effect of performance

Active Publication Date: 2018-10-23
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 49.4gE-44 type epoxy resin, and continue stirring for 20 minutes to obtain epoxy resin Asphalt; 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...

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 and a water-in-oil-based drilling fluid, and preparation methods thereof. The modified epoxy asphalt particle comprises, by mass, 7 to 9 partsof a core composed of epoxy asphalt and 1 to 3 parts of a shell formed by a modifier. The modifier comprises poly-sulfur and free sulfur, wherein a weight ratio of the poly-sulfur to the free sulfurin the modifier is 3:7 to 7:3. The water-in-oil-based drilling fluid comprises, by mass, 0.5% to 5% of a main emulsifier, 0.1% to 3% of an auxiliary emulsifier, 1% to 3% of organic soil and 1% to 5%ofthe modified epoxy asphalt particle, with the balance being an oil-water base. According to the invention, the modified epoxy asphalt particle is used as a performance regulator for the water-in-oil-based drilling fluid and can maintain good particle state and high-temperature deformation capability in the water-in-oil-based drilling fluid, so plugging and fluid-loss-reducing effects are improved.

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 Applications(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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