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Oil-soluble film-coated particle flow regulator and its preparation method and application

An oil-soluble, flow-regulating agent technology, applied in chemical instruments and methods, mining fluids, earthwork drilling and production, etc., can solve problems such as complex components of flow-regulating agents, poor oil-water selectivity, difficulty in adapting to high-temperature and high-salinity formations, etc.

Active Publication Date: 2020-09-01
SINOPEC NORTHWEST OIL FIELD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the technical problems in the prior art that the components of the flow regulating agent are relatively complex, and the oil-water selectivity is poor, the difference between the particle density and the injected water density of the formation is too large, and it is difficult to adapt to the high temperature and high salinity of the formation, and to provide a A composition-simplified oil-soluble film-coated particle flow regulator and its preparation method and application in fracture-cavity reservoir development

Method used

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  • Oil-soluble film-coated particle flow regulator and its preparation method and application
  • Oil-soluble film-coated particle flow regulator and its preparation method and application
  • Oil-soluble film-coated particle flow regulator and its preparation method and application

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preparation example Construction

[0040] The present invention also provides a kind of preparation method of above-mentioned film-coated particle flow regulator, and the method comprises the following steps:

[0041] (1) Petroleum resin is mixed with hollow microspheres in molten state;

[0042] (2) adding cotton linters to the mixture obtained in step (1) to obtain a coating agent;

[0043] (3) The coating agent obtained in step (2) is used to coat the coating core to obtain the oil-soluble coating particle flow regulator.

[0044] Wherein, the molten state of the petroleum resin refers to the state in which the petroleum resin changes from solid to liquid.

[0045] According to the preparation method of the present invention, the preparation of coating agent (such as figure 1 As shown), the petroleum resin is melted at high temperature to reach a fluid state. In the molten petroleum resin, first add hollow microspheres and mix uniformly, then add cotton linters, mix uniformly, and obtain a coating agent (s...

Embodiment 1

[0069] This example is used to illustrate the film-coated particle flow regulator provided by the present invention and its preparation method.

[0070] (1) Take 100g of C9 petroleum resin with a density of 1.15g / cm 3 , melted at a high temperature of 180°C for later use; take 50g of hollow glass microspheres, density 0.4g / cm 3 , particle size 20 μm, add in high-temperature molten petroleum resin and mix evenly, finally add 15g of cotton linters; stir the mixture evenly to obtain a coating agent with an apparent density of 0.75g / cm 3 ;

[0071] (2) Take 100g of regenerated rubber particles, density 1.3g / cm 3 , with a particle size of 2mm, put it into the fluidized bed, and use hot air to blow it up; spray the above coating agent on the upper part of the fluidized bed to coat the particles, and when the thickness of the shell layer reaches 0.32mm, increase the air velocity to carry out Blow it out, then carry out air cooling and cyclone separation to obtain a film-coated par...

Embodiment 2

[0073] This example is used to illustrate the film-coated particle flow regulator provided by the present invention and its preparation method.

[0074] (1) Take 75g of C9 petroleum resin with a density of 1.15g / cm 3, melted at a high temperature of 180°C for later use; take 50g of hollow glass microspheres with a density of 0.4g / cm 3 , particle size 30μm, add high-temperature molten petroleum resin and mix evenly, finally add 10g of cotton linters; stir the mixed material evenly to obtain a coating agent with an apparent density of 0.69g / cm 3 ;

[0075] (2) Get 125g of regenerated rubber particles, density 1.3g / cm 3 , with a particle size of 1mm, put it into the bottom of the fluidized bed, and use hot air to blow it up; spray the above-mentioned coating agent on the upper part of the fluidized bed to coat the particles, and when the thickness of the shell layer reaches 0.1mm, increase the air velocity to carry out Blow it out, then carry out air cooling and cyclone separa...

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Abstract

An oil-soluble coated particle flow modifier, a preparation method thereof, and a use thereof in fractured-vuggy carbonate reservoirs mining. The oil-soluble coated particle flow modifier is of a core-shell structure, which has a core layer of a coated core and a shell layer of a coating agent, wherein the coated core is made of a plugging material, and the coating agent consists of petroleum resin and hollow beads. Based on the total weight of the coated particle flow modifier, the content of the petroleum resin, the hollow beads, the cotton linters, and the coated cores is 10-40 wt %, 9-40 wt %, 1-10 wt %, and 35-80 wt %, respectively. A preparation method of the coated particle flow modifier and a use of the coated particle flow modifier in fractured-vuggy carbonate reservoirs mining to improve oil recovery is also provided.

Description

technical field [0001] The invention relates to the field of petroleum development, in particular to an oil-soluble film-coated particle flow regulator, a preparation method thereof, and an application in fracture-cavity oil reservoir exploitation. Background technique [0002] The proven content of fractured-vuggy carbonate reservoirs accounts for about 2 / 3 of the reserves in the west, and is one of the important areas for increasing reserves and production in my country. Different from sandstone reservoirs, fracture-cavity reservoirs are dominated by fractures and caves, so it is difficult to apply conventional reservoir deep control and displacement technologies. Tahe Oilfield once proposed the concept of channel adjustment for fractured-vuggy reservoirs, and conducted field verification, which proved that channel adjustment is one of the important measures to solve the limitation of plane sweep in large fractured-vuggy reservoirs. [0003] At present, the pilot test of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/508C09K8/516C09K8/42E21B33/13
CPCC09K8/426C09K8/508C09K8/516C09K2208/04C09K2208/06C09K2208/10E21B33/13C09K8/502E21B33/138C09K2208/08E21B43/16
Inventor 何龙方吉超焦保雷戴彩丽由庆钱真甄恩龙赵光巫光胜刘逸飞
Owner SINOPEC NORTHWEST OIL FIELD
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