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Method for improving rock surface water wettability based on plasma and application of method

A plasma and microwave plasma technology, applied in the field of rock modification, can solve the problem of changing the wettability of the rock surface, etc., and achieve the effect of good effect, high safety and simple operation

Active Publication Date: 2020-06-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, studies on changing the wettability of rock surfaces using plasma technology have not been reported

Method used

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  • Method for improving rock surface water wettability based on plasma and application of method
  • Method for improving rock surface water wettability based on plasma and application of method
  • Method for improving rock surface water wettability based on plasma and application of method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 A Plasma-Based Method for Improving the Water Wettability of Rock Surfaces

[0045] Microwave plasma is used to directly treat the rock surface; among them, microwave plasma is generated based on pulse-modulated microwave excitation source, using microwave plasma treatment with a pulse frequency of 1000Hz, a duty cycle of 50%, a frequency of 2.45GHz, and a peak power of 100W , the distance between the plasma and the rock surface is 3mm, air with a flow rate of 10L / min is used as the working gas, and the processing time is 3min.

Embodiment 2

[0046] Example 2 A Plasma-Based Method for Improving the Water Wettability of Rock Surfaces

[0047] Microwave plasma is used to directly treat the rock surface; among them, microwave plasma is generated based on pulse-modulated microwave excitation source, using microwave plasma treatment with a pulse frequency of 800Hz, a duty cycle of 80%, a frequency of 2.45GHz, and a peak power of 150W. , the distance between the plasma and the rock surface is 3mm, air with a flow rate of 10L / min is used as the working gas, and the processing time is 5min.

Embodiment 3

[0048] Example 3 A Plasma-Based Method for Improving the Water Wettability of Rock Surfaces

[0049] Microwave plasma is used to directly treat the surface of rock; among them, microwave plasma is generated based on pulse-modulated microwave excitation source, using microwave plasma treatment with a pulse frequency of 500Hz, a duty cycle of 100%, a frequency of 2.45GHz, and a peak power of 200W , the distance between the plasma and the rock surface is 3mm, air with a flow rate of 10L / min is used as the working gas, and the processing time is 7min.

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Abstract

The invention provides a method for improving rock surface water wettability based on plasma and an application of the method, and particularly relates to the technical field of rock. The method adopts plasma to directly treat the surface of rock. The method is mainly used for oil and gas exploitation and oil-containing soil purification, the rock is treated through microwave plasmas, the water contact angle of the rock surface is changed to different degrees, and thus the water wettability of the rock surface is changed.

Description

technical field [0001] The invention relates to the technical field of rock modification, in particular to a method and application for improving the water wettability of rock surface based on plasma. Background technique [0002] Since the Industrial Revolution, with the advancement of the world's industrial system and the development of the world economy, oil resources have played an increasingly important role in the international market. Oil production and reserves represent a country's economic development level and development potential. At present, most major oilfields have entered a state of high water cut after repeated oil recovery, and the current situation forces human beings to continue to explore ways to enhance oil recovery. The wettability of the reservoir (such as the wettability of underground rocks), as one of the important parameters of the reservoir interface phenomenon, plays a decisive role in the recovery of crude oil. However, the wettability of und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/00
CPCC04B41/0054
Inventor 于红刘建林符力耘宫礼坤霍震
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)