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Carbon-based nano wetting reversal agent as well as preparation method and application thereof

A wetting reversal and carbon-based nanotechnology, applied in the chemical field, can solve the problems of high cost, low temperature resistance, unstable effect, etc., and achieve the effect of improving recovery and reducing filtration loss

Pending Publication Date: 2020-09-11
NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These existing products have some disadvantages, such as: high cost, unstable effect, not resistant to high temperature, etc.

Method used

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  • Carbon-based nano wetting reversal agent as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0047] The novel carbon-based nano-wetting reversal agent includes: 0.15wt% modified nano-graphene oxide, 0.6wt% emulsifier OP-10, 35wt% ethanol, and the rest is water (total mass is 1000g).

[0048] Preparation of modified nano-graphene oxide: Dissolve 1 g of graphene oxide in 400 mL of deionized water, adjust the pH value of the graphene oxide solution to 8-9 with ammonia water, and use an ultrasonic cell pulverizer to sonicate the solution for 1 hour to obtain graphite oxide Alkene aqueous solution, continue to heat to 80 ° C, stir and reflux. Dissolve 1 g of octadecylamine in 100 mL of absolute ethanol, slowly add it to the graphene oxide aqueous solution at a volume ratio of 1:4, stop the reaction after 6 hours, and obtain a dispersion of octadecylamine-modified graphene oxide.

[0049] The particle size test procedure of the modified nano-graphene oxide is as follows: pour the modified graphene oxide dispersion into a beaker, stir evenly, ultrasonically for 20 minutes, a...

Embodiment 2

[0051]The novel carbon-based nano-wetting reversal agent includes: 0.1wt% modified nano-graphene oxide, 0.8wt% emulsifier OP-15, 30wt% propanol, and the rest is water (total mass is 1000g).

[0052] Preparation of modified nano-graphene oxide: Dissolve 1 g of graphene oxide in 400 mL of deionized water, adjust the pH value of the graphene oxide solution to 8-9 with ammonia water, and use an ultrasonic cell pulverizer to sonicate the solution for 1 hour to obtain graphite oxide Aqueous solution of olefin, continuously heated to 70 ° C, stirred and refluxed. Dissolve 1 g of hexadecylamine in 100 mL of propanol, slowly add it to the graphene oxide aqueous solution at a volume ratio of 1:5, and stop the reaction after 3 hours to obtain a dispersion of hexadecylamine-modified graphene oxide.

[0053] The particle size test procedure of the modified nano-graphene oxide is as follows: pour the modified graphene oxide dispersion into a beaker, stir evenly, ultrasonically for 20 minute...

Embodiment 3

[0055] The novel carbon-based nano-wetting reversal agent includes: 0.2wt% modified nano-graphene oxide, 0.7wt% emulsifier Tween 80, 40wt% ethylene glycol, and the rest is water (1000g in total mass).

[0056] Preparation of modified nano-graphene oxide: Dissolve 1 g of graphene oxide in 400 mL of deionized water, adjust the pH value of the graphene oxide solution to 8-9 with ammonia water, and use an ultrasonic cell pulverizer to sonicate the solution for 1 hour to obtain graphite oxide Aqueous solution of olefin, continuously heated to 60 ° C, stirred and refluxed. Dissolve 1 g of dodecylamine in 100 mL of ethylene glycol, slowly add it to the graphene oxide aqueous solution at a volume ratio of 1:6, stop the reaction after 4 hours, and obtain a dispersion of dodecylamine-modified graphene oxide.

[0057] The particle size test procedure of the modified nano-graphene oxide is as follows: pour the modified graphene oxide dispersion liquid into a beaker, stir evenly, ultrasoni...

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Abstract

The invention discloses a carbon-based nano wetting reversal agent and application thereof. The carbon-based nano wetting reversal agent comprises modified nano graphene oxide, a surfactant and a solvent I, wherein the solvent I is selected from at least one of alcohol compounds. The novel carbon-based nano wetting reversal agent can be applied to drilling fluid, the surface of stratum rock can bekept in a hydrophilic state, the wettability of the surface of oil-wet rock is converted into water wettability, and the subsequent water injection of a water injection well or the improvement of therecovery ratio of an oil production well is facilitated.

Description

technical field [0001] The application relates to a carbon-based nano-wetting reversal agent and its application, belonging to the field of chemical technology. Background technique [0002] Wettability is a surface characteristic of rocks and is the main factor controlling the flow and distribution of reservoir fluids in porous media. In the process of drilling, well completion, workover, implementation of stimulation measures and water injection development, the wettability of the rock pore surface will change after the invasion of foreign fluids such as drilling fluid and completion fluid into the reservoir. Although the wettability of the rock surface changes, it does not affect the absolute permeability of the reservoir, but it has a direct impact on the relative permeability of the oil and water phases. If the change of wettability causes the relative or effective permeability of oil to decrease obviously, that is, damage to the reservoir, it will inevitably seriously...

Claims

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Application Information

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IPC IPC(8): C09K8/03C09K8/32C01B32/198
CPCC01B32/198C09K8/032C09K8/32C09K2208/12
Inventor 赵凤鸣陶震徐骏徐胜明俞波王耀国
Owner NINGBO FENGCHENG ADVANCED ENERGY MATERIALS RES INST
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