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Graphene armor reinforced foam system for oil-gas field and preparation method of foam system

A foam system and graphene technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of foam stabilizer without surface activity, formation porous medium adsorption, no foaming ability, etc., to achieve the effect of increasing production Good, weakens the effect of rupture and reduces fluid loss

Active Publication Date: 2019-03-08
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this invention, the water-soluble polymer is a foam stabilizer, specifically polyacrylamide, partially hydrolyzed polyacrylamide or xanthan gum. Generally, this type of foam stabilizer does not have surface activity, has no foaming ability, and is stable at high temperature. It is easy to pyrolyze under the conditions, and the remaining organic residues will cause adsorption or blockage damage to the porous medium of the formation to a certain extent.

Method used

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Effect test

Embodiment 1-3

[0082] Embodiment 1-3, the foam system reinforced by graphene armor for oil and gas fields

[0083] The raw materials are gas phase, liquid phase and graphene oxide, and the specific components are as follows:

[0084] The gas phase is nitrogen.

[0085] The mass percent composition of liquid phase is as follows:

[0086] 0.3wt% blowing agent, 0.05wt% foaming aid, 0.45wt% adsorption aid, and the balance is water, wherein the blowing agent is di(2-ethylhexyl)sulfonate sodium succinate and fatty alcohol polyoxyethylene ether sodium sulfate in a mass ratio of 3:1; the foaming aid is lauryl alcohol; the adsorption aid is a mixture of camellia saponin and sodium bicarbonate, and the addition ratio is 4:1 ( quality).

[0087] Graphene oxide has a specific surface area of ​​300m 2 / g, the monolayer rate is 86%, the average thickness of the sheet is 3nm, the average diameter of the sheet is 7um, and the oxygen content is 30%; the added concentration of graphene oxide in the liquid...

Embodiment 4-6

[0102] Embodiment 4-6, the foam system reinforced by graphene armor for oil and gas fields

[0103] The raw materials are gas phase, liquid phase and graphene oxide, and the specific components are as follows:

[0104] The gas phase is carbon dioxide.

[0105] The mass percent composition of liquid phase is as follows:

[0106] 0.3wt% blowing agent, 0.05wt% foaming aid, 0.45wt% adsorption aid, and the balance is water, wherein the blowing agent is di(2-ethylhexyl)sulfonate sodium succinate and fatty alcohol polyoxyethylene ether sodium sulfate in a mass ratio of 3:1; the foaming aid is lauryl alcohol; the adsorption aid is a mixture of camellia saponin and sodium bicarbonate, and the addition ratio is 4:1 ( quality).

[0107] Graphene oxide has a specific surface area of ​​300m 2 / g, the monolayer rate is 86%, the average thickness of the sheet is 3nm, the average diameter of the sheet is 7um, and the oxygen content is 30%; the added concentration of graphene oxide in the ...

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Abstract

The invention discloses a graphene armor reinforced foam system for an oil-gas field and a preparation method of the foam system. The foam system is prepared from a gas phase, a liquid phase and graphene oxide, wherein the gas phase is nitrogen, carbon dioxide, natural gas or air; the liquid phase is an aqueous solution of a foaming agent, a blowing promoter and an adsorption assistant. Graphene oxide in foam can be strongly adsorbed on the gas-liquid interface of the foam, then a stable graphene armor layer is formed on an air bubble film and can effectively inhibit diffusion of gas in the foam through a liquid film and weaken of bubble coalescence, and meanwhile, the graphene armor layer can reduce loss of the liquid in the liquid film. Besides, the graphene armor layer can substantiallyimprove mechanical strength of the liquid film and effectively reduce breakage of the liquid film. By means of the graphene armor layer in the foam system, the foam has good stability. The graphene armor reinforced foam system is non-toxic and non-pollution, produces little formation damage and has the green and environment-friendly characteristics.

Description

technical field [0001] The invention relates to a foam system reinforced with graphene armor for oil and gas fields and a preparation method thereof, belonging to the technical field of oil and gas field development engineering. Background technique [0002] With the rapid development of my country's national economy, the country's consumption of oil resources is increasing year by year. More than 70% of domestic crude oil production comes from old oilfields, and the continuous stable production and efficient development of old oilfields are a major requirement of the national energy strategy. In order to stabilize the output of old oilfields in the east, a series of profile control and flooding technologies and processes have been tried and developed in China, such as polymer flooding, surfactant flooding, alkali flooding, composite flooding, miscible flooding, etc., among which foam fluid Oil recovery technology is an important means of enhancing oil recovery. [0003] A...

Claims

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Application Information

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IPC IPC(8): C09K8/594C09K8/60C09K8/94
CPCC09K8/594C09K8/604C09K8/94
Inventor 吕其超左博文张娟董朝霞郑海敏林梅钦杨子浩
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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