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Lamellar nanoparticle enhanced high-temperature-resistant high-strength foam system and preparation method thereof

A nanoparticle and foam system technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of inapplicable heavy oil thermal recovery, etc., achieve deep control and displacement, prolong the action time, and solve the problem of short validity period Effect

Inactive Publication Date: 2020-01-17
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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Problems solved by technology

For example, Chinese patent CN 108659807 A discloses a magnetic nanoparticle synergistic foam system. The flow characteristics of the system can be adjusted by a magnetic field, and the stability of the foam can be controlled by the strength of an external magnetic field. However, the upper limit of the temperature resistance of the system is 80°C. Not suitable for heavy oil thermal recovery

Method used

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  • Lamellar nanoparticle enhanced high-temperature-resistant high-strength foam system and preparation method thereof
  • Lamellar nanoparticle enhanced high-temperature-resistant high-strength foam system and preparation method thereof

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preparation example Construction

[0028] The present invention also relates to the preparation method of described foam system, it comprises the following steps:

[0029] (1) dispersing the flake nanoparticles in water to prepare a dispersed nanoparticle solution;

[0030] (3) Under stirring, add the high-temperature foaming agent and the interface regulator to the above-mentioned nanoparticle solution sequentially or simultaneously to obtain a foam system.

[0031] In a preferred embodiment, in step (1), the dispersion is firstly carried out by using a high-speed mixer, and then by ultrasonic dispersion.

[0032] In a preferred embodiment, in step (2), the stirring is carried out at a speed of above 8000 rpm, such as above 10000 rpm, for more than 30 seconds, such as above 60 seconds.

[0033] In a specific embodiment, the foam system is prepared as follows:

[0034] Fully disperse a certain amount of nanoparticles in water at 50-80°C, stir with a high-speed mixer at 10,000rpm for several minutes, for examp...

Embodiment 1

[0043] With 0.1g graphene oxide (its specific surface area 420m 2 / g) placed in 99.3g of water at 60°C to fully disperse, using a high-speed stirrer to stir at 10000rpm for 5min, and then disperse it in an ultrasonic disperser for 10min to form a nanoparticle solution. Then, 0.5 g of sodium dodecylbenzene sulfonate and 0.1 g of tetrasodium aminotrimethylene phosphonate were simultaneously added to the above nanoparticle solution, and stirred with a high-speed mixer at 10,000 rpm for 1 min to obtain a foaming liquid. Inject 20g of foaming liquid into a high-temperature and high-pressure foam apparatus. The temperature of the foam apparatus is set at 150°C and the pressure is 7MPa. Nitrogen is injected at a speed of 150ml / min. The maximum foam height is 12.5cm and the half-life of the foam is 5.2min.

Embodiment 2

[0045] With 0.05g graphene oxide (its specific surface area 420m 2 / g), 0.15g laponite (its specific surface area is 370m 2 / g) placed in 99.1g of water at 60°C to fully disperse, using a high-speed stirrer to stir at 10,000rpm for 5min, and then place it in an ultrasonic disperser for 10min to form a nanoparticle solution. Then, 0.5 g of sodium dodecylbenzenesulfonate and 0.2 g of potassium hydroxyethylidene diphosphonate were simultaneously added to the above nanoparticle solution, and stirred at 10,000 rpm for 1 min with a high-speed mixer to obtain a foaming liquid. Inject 20g of foaming liquid into a high-temperature and high-pressure foam apparatus. The temperature of the foam apparatus is set at 150°C and the pressure is 7MPa. Nitrogen is injected at a speed of 150ml / min. The maximum foam height is 12.9cm and the half-life of the foam is 5.1min.

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Abstract

The invention relates to a lamellar nanoparticle enhanced high-temperature-resistant high-strength foam system which is composed of the following components in parts by weight: 0.1-6 parts of a high-temperature foaming agent, 0.05-3 parts of flake nanoparticles; 0.01-3 parts of an interface regulator and the balance of water, wherein the total part of the components by weight is 100. The inventionfurther relates to a preparation method of the high-temperature-resistant high-strength foam system.

Description

technical field [0001] The invention relates to a temperature-resistant high-strength foam system synergized by sheet-layer nanoparticles and a preparation method thereof. Background technique [0002] The heavy oil reservoir enters the later stage of multi-round huff and puff of steam injection, and the development effect becomes worse; it is characterized by low periodic oil production, low oil-steam ratio, and high comprehensive water cut. The low sweep efficiency of injected steam is the main reason for the above problems. The formation heterogeneity together leads to severe steam channeling, the injected steam channeled from the high permeability zone, and the low permeability zone rich in remaining oil has not been effectively produced, which led to the increase of water content in the produced fluid after multiple rounds of huff and puff, and the effect changed. Difference. The effect of foam profile control technology in thermal recovery gradually becomes worse wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/518C09K8/506
CPCC09K8/506C09K8/518
Inventor 谢志勤何绍群翟勇盖平原于昭东贺文媛徐鹏王飞刘岩曹秋芳
Owner CHINA PETROLEUM & CHEM CORP
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