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Nanometer displacement agent and preparation method thereof

An oil-displacing agent and nanotechnology, applied in the field of nano-oil-displacing agent and its preparation, can solve the problems of unsatisfactory field application effect, inability to expand the swept volume, general oil displacement effect, etc., achieve low price, strong profile control ability, apply good effects

Inactive Publication Date: 2013-07-17
CHINA UNIV OF GEOSCIENCES (BEIJING)
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AI Technical Summary

Problems solved by technology

Tertiary oil recovery is mainly to improve the performance of oil, gas, water and rock by adding chemical substances, thereby enhancing the recovery of crude oil. Currently, the commonly used methods mainly include alkali flooding, polymer flooding, surfactant flooding and secondary flooding. flooding, ASP flooding, etc., but these methods have a limited degree of improvement in recovery, and it is difficult to make breakthroughs.
Scholars at home and abroad have started research on the application of nanomaterials in the field of petroleum industry, such as deep profile control, heavy oil viscosity reduction, low-permeability oil reservoir injection enhancement, etc. In terms of improving oil displacement efficiency, nano-membrane flooding has also appeared. However, the existing nano-membrane oil-displacing agents and nano-emulsion oil-displacing agents have mediocre oil displacement effects, and more importantly, they have poor profile control capabilities, cannot expand the swept volume, and are not effective in field application. ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Prepare nanometer oil displacement agent as follows:

[0020] (1) prepare raw materials according to the following mass percentage: 0.5%~3% Na 2 CO 3 , 1% to 5% of polysilicon nanomaterials (nano silicon dioxide), 1% to 5% of sodium dodecyl sulfate (SDS), 0.5% to 5% of partially hydrolyzed polyacrylamide (PHPA), and the rest measure water;

[0021] (2) Na 2 CO 3 Configured as Na with a concentration of 0.5% to 3% 2 CO 3 aqueous solution;

[0022] (3) Na polysilicon nanomaterial and sodium dodecyl sulfate (SDS) are fully mixed and then added to step (1) 2 CO 3 in aqueous solution;

[0023] (4) Then add partially hydrolyzed polyacrylamide (PHPA) and stir evenly to obtain the nano oil displacing agent.

[0024] In the laboratory of China University of Geosciences (Beijing) College of Engineering Technology, artificial cores (gas permeability range 126×10 -3 um 2 ~2365×10 -3 um 2 ) displacement experiment, the oil displacement efficiency of the nano oil displa...

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PUM

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Abstract

The invention discloses a nanometer displacement agent and a preparation method thereof. The nanometer displacement agent is prepared from the following components by weight percent: 0.5-3% of alkali, 1-5% of polysilicic nanometer material, 1-5% of surfactant, 0.5-5% of polymer and the balance of water. The invention has reasonable formula, simple process, is safe and environment-friendly, and has low price; and the nanometer displacement agent of the invention can improve the displacement efficiency of tertiary oil recovery.

Description

technical field [0001] The invention relates to an oil-displacing agent, in particular to a nanometer oil-displacing agent and a preparation method thereof. Background technique [0002] As a non-renewable energy source, oil production can only be increased by enhancing crude oil recovery, especially tertiary oil recovery. Tertiary oil recovery is mainly to improve the performance of oil, gas, water and rock by adding chemical substances, thereby enhancing the recovery of crude oil. Currently, the commonly used methods mainly include alkali flooding, polymer flooding, surfactant flooding and secondary flooding. However, these methods have a limited degree of improvement in recovery, and it is difficult to make a breakthrough. [0003] Nanomaterials are emerging materials that have received the most attention in recent years. After the basic particles that make up a substance reach the nanoscale, their properties will undergo a series of changes, that is, nanoeffects (such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/58
Inventor 杨浩郑秀华
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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