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On-site measurement and imaging device and method of crude oil water content based on microwave backscattering

A technology for on-site measurement and moisture content, which is applied in the direction of using microwaves to test moisture content, etc.

Active Publication Date: 2021-02-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under such high water cut conditions, water is the continuous phase, and affected by the mineralization of formation water, crude oil has strong electrical conductivity, causing the capacitance method to fail due to the short circuit of the measuring electrode

Method used

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  • On-site measurement and imaging device and method of crude oil water content based on microwave backscattering
  • On-site measurement and imaging device and method of crude oil water content based on microwave backscattering
  • On-site measurement and imaging device and method of crude oil water content based on microwave backscattering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] 1) The tubular measuring container 1 is installed between the two sections of the oil pipe and connected coaxially, and the crude oil in the oil pipe flows through the tubular measuring container 1 and is filled.

[0056] Under the condition that the crude oil in the tubular measuring container 1 is a uniformly mixed fluid, the transmitting circuit or receiving circuit 4 controls a coaxial leaky wave antenna 2 to emit electromagnetic waves, and when the electromagnetic waves meet the crude oil in the tubular measuring container 1 and the inner wall of the tubular measuring container 1 Scattering occurs, and is received by another coaxial leaky-wave antenna 2 after scattering;

[0057] 2) Use each coaxial leaky-wave antenna 2 as a transmitting antenna, and use each of the remaining coaxial leaky-wave antennas 2 as a receiving antenna to form different antenna combinations. Each antenna combination is repeatedly implemented according to the above steps, and the Multiple m...

Embodiment 2

[0074] 1) The tubular measuring container 1 is placed in a section of oil pipe, and the crude oil in the oil pipe flows through the tubular measuring container 1 and is filled.

[0075] Under the condition that the crude oil in the tubular measuring container 1 is an oil-water layered fluid, the transmitting circuit or receiving circuit 3 controls a part of the coaxial leaky wave antenna 2 to emit electromagnetic waves, and the electromagnetic waves meet the crude oil in the tubular measuring container 1 and the inner wall of the tubular measuring container 1 Scattering takes place every time, and is received by another part of the coaxial leaky-wave antenna 2 after scattering;

[0076] 2) Use each coaxial leaky-wave antenna 2 as a transmitting antenna, and use each of the remaining coaxial leaky-wave antennas 2 as a receiving antenna to form different antenna combinations. Each antenna combination is repeatedly implemented according to the above steps, and the Multiple measur...

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Abstract

The invention discloses a device and method for on-site measurement and imaging of the water content of crude oil based on microwave backscattering. The tubular measuring container with both upper and lower ends opened is installed between two sections of oil pipe or installed inside the oil pipe, filled with crude oil, the inner wall of the tubular measuring container is embedded with a coaxial leaky wave antenna, and the coaxial leaky wave antenna is connected to the external Transmitting / receiving circuit, different coaxial leaky wave antennas are connected to the transmitting circuit or receiving circuit in turn through switches; different antenna combinations are used for multiple measurements to obtain scattered signals, calibrated to obtain electric fields, and then processed to obtain the complex dielectric constant of crude oil, according to the complex number Dielectric constant to get water cut or distribution. The measuring device and method of the present invention can measure and image the complex dielectric constant of crude oil with high water content and obtain the water content of crude oil under the premise of not disturbing the flow of crude oil.

Description

technical field [0001] The invention relates to a measurement and imaging device and method for crude oil in an oil field production well, in particular to a microwave inverse scattering-based on-site measurement and imaging device and method for the water content of crude oil. Background technique [0002] The on-site measurement of the water content of crude oil in different layers in the production well of the oil field is helpful to adjust the production of the oil field and improve the efficiency of oil recovery. Since the dielectric constant of water and oil is very different, the method of judging the water content by measuring the dielectric constant of crude oil has been widely used. Crude oil in an oil well is a multiphase flow containing oil, gas, water and other fluids. In oil wells with different temperatures, flow velocities and inclinations, the multiphase flow of crude oil presents different flow patterns, such as "oil-in-oil water", "oil in water", stratifi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N22/04
CPCG01N22/04
Inventor 申发中冉立新
Owner ZHEJIANG UNIV
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