CN203224457U

CN203224457U - Sensor for measuring water content in oil well

Info

Publication number: CN203224457U
Application number: CN 201320236700
Authority: CN
Inventors: 何明; 李英波; 刘金柱
Original assignee: Beijing Huanding Technology Co Ltd
Current assignee: Beijing Huanding Technology Co Ltd
Priority date: 2013-05-03
Filing date: 2013-05-03
Publication date: 2013-10-02
Anticipated expiration: 2023-05-03

Abstract

The utility model relates to a measuring sensor, and particularly relates to a sensor for measuring the water content in an oil well. The sensor comprises an oscillator, a coupler, a microwave probe, a first amplifier, a second amplifier, an I/Q (In-phase/Quadrature) demodulator, a first filtering amplifier, a second filtering amplifier, an ADC (Analog-Digital Converter), a microprocessor and an interface circuit, wherein the oscillator is connected with the coupler which is connected with the microwave probe; the coupler is connected with the I/Q demodulator by the first amplifier; the microwave probe is connected with the I/Q demodulator by the second amplifier; the I/Q demodulator is connected with the ADC by the first filtering amplifier and the second filtering amplifier; the ADC is connected with the microprocessor which is connected with the interface circuit. The measuring sensor has the beneficial effects that by virtue of strong penetrability of microwaves, not only can water on the surface layer of a substance be detected, but also the content of water in the substance can be detected. The measuring sensor has the obvious advantages of short measuring time, high efficiency and the like.

Description

A kind of measurement of water ratio in oil well sensor

Technical field

The present invention relates to a kind of measurement sensor, more particularly to a kind of measurement of water ratio in oil well sensor.

Background technology:

At present, during oil extraction, to determine the crude oil and gas production of each oil well, understand the change of hydrocarbon stratum content and earth formation, continuous metering need to be carried out to the volume flow of each component in produced liquid in oil well and real time measure data are provided, to optimize manufacturing parameter, improve recovery ratio.

Similar technique: (1) neutron irradiation method: complex structure, debugs that cumbersome, expensive, management is strict, resolution ratio is not high, and the solids content of oil is influenceed than larger on it. (2) radio frequency capacitance method: simple structure, debugging are convenient, cheap, and sensitivity is high. But low aqueous certainty of measurement is high to require that oil salinity higher, oily is big on measuring accuracy influence, gas etc. is influenceed than larger, is generally used for low aqueous, low mineralization well measurement and is used. (3) radio frequency frequency displacement method: simple structure, practicality is relatively good, but the influence of oil well gas content is than larger, and oily emulsifiability influence is big, and High water cut certainty of measurement is poor. (4) other method such as density, quality: complex structure, expensive, cumbersome, the single-phase liquid certainty of measurement of debugging are higher, the low precision when crude oil (Oil, Water, Gas three-phase liquid) is measured. (5) Karl_Fischer method: surveys oil product micro-water content. (6) microwave method (this project achievement in research): simple structure, convenient debugging, moderate cost, high precision (in the range of crude oil water containing 0～100% within error 3%).

The content of the invention

In order to solve the above problems, it is an object of the invention to provide a kind of simple structure, debugging be convenient, high precision measurement of water ratio in oil well sensor.

The technical scheme is that measurement of water ratio in oil well sensor, the sensor includes oscillator, coupler, microwave probe, the first amplifier, the second amplifier, i/q demodulator, the first filter amplifier, the second filter amplifier, ADC converters, microprocessor and interface circuit;

Wherein, the oscillator is connected with the coupler, the coupler is connected with the microwave probe, the coupler is connected by first amplifier with the i/q demodulator, the microwave probe is connected by second amplifier with the i/q demodulator, the i/q demodulator is connected by first filter amplifier and the second filter amplifier with the ADC converters, and the ADC converters are connected with the microprocessor, and the microprocessor is connected with the interface circuit.

It is strong using the penetration capacity of microwave the beneficial effects of the invention are as follows: the sensor, what it was detected is not only the moisture on material top layer, the moisture gone back inside detectable substance, and with time of measuring is short, the remarkable advantage such as efficiency is high. The foundation of microwave measurement crude oil water content is that profit dielectric constant difference is larger. The different oil water mixture dielectric constant of moisture content is different thus also different to the absorption of microwave signal. According to through the microwave signal size after oil water mixture and phase shift, the moisture content of oil water mixture can be predicted.

Brief description of the drawings

Fig. 1 is the structured flowchart of measurement of water ratio in oil well sensor of the present invention.

Specific embodiment

Technical scheme is described further with reference to specific embodiment.

As shown in Figure 1, measurement of water ratio in oil well sensor of the present invention, the sensor includes oscillator, coupler, microwave probe, the first amplifier, the second amplifier, i/q demodulator, the first filter amplifier, the second filter amplifier, ADC converters, microprocessor and interface circuit;

Operation principle of the invention is: by the probe insertion medium of the sensor, power supply use ± 15V, it is energized the square-wave signal that signal produces fixed frequency by oscillator, square-wave signal is by after coupler treatment, pass through microwave probe and the first amplifier respectively, the signal for being sent to the first amplifier is sent to i/q demodulator and is processed by the signal that the first amplifier amplifies, signal is by after the first filter filtering after treatment, microprocessor is sent to after being changed through ADC converters, the square-wave signal for being sent to microwave probe is sent by medium through microwave probe, return to microwave probe, square-wave signal after return puts treatment by the second amplifier, i/q demodulator is then forwarded to be processed, signal is sent to microprocessor after being changed through ADC converters after the second filter filtering after treatment, the signal that microprocessor will be received is further processed, signal sends after interface circuit is by treatment again.

It is described above to be merely exemplary for the utility model; and it is nonrestrictive, those of ordinary skill in the art understand, in the case where the spirit and scope that claim is limited are not departed from; many modifications, change or equivalent can be made, but is fallen within protection domain of the present utility model。

Claims

1. a kind of measurement of water ratio in oil well sensor, characterized in that, the sensor includes oscillator, coupler, microwave probe, the first amplifier, the second amplifier, i/q demodulator, the first filter amplifier, the second filter amplifier, ADC converters, microprocessor and interface circuit;