RU2654099C1 - Device for control over the wells production components flow rate - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas production industry and can be used to control the gas, gas condensate and oil wells production flow parameters. Device contains the controlled flow pressure and temperature sensors and a piezoceramic flow pressure pulsations sensor connected to the input of a broadband matching amplifier. Broadband matching amplifier outputs are connected to the inputs of the first, second and third active bandpass filters. First active bandpass filter output is connected to the programmable gain ratio amplifier first input. Output of the second one is connected to the first detector input, and the output of the third one is connected to the second detector input. Programmable gain ratio amplifier output is connected to the first input of the two-channel analog-to-digital converter. First detector output is connected to the second input of the two-channel analog-to-digital converter through a series-connected integrator and a scaling amplifier. Second detector output is connected to the pulses generator first input through the level comparator, to the second input of which the reference frequency clock pulse generator is connected. Outputs of the dual-channel analog-to-digital converter, scaling amplifier, pulses generator and pressure sensors and controlled flow temperature are connected to the microprocessor controller first, second, third, fourth and fifth information inputs, respectively, which said outputs are connected to the digital interface inputs, and its control output is connected to the programmable gain ratio amplifier second input.

EFFECT: achieved technical result consists in providing, in addition to the information on the number of particle impacts of sand impurities and water impurities per unit of time determined by the impact signal exceeding of the predetermined threshold value, information on the impact action parameters, determined by the impurity particles mass and velocity, due to the generation of the signals proportional to the impact action intensity.

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Description

The invention relates to the field of oil and gas industry and can be used to control the flow parameters of gas, gas condensate and oil wells, namely, to measure the production rate, separately the flow rate of gas and the flow rate of liquid (gas condensate, oil), measure the amount of liquid and solid impurities (separately consumption of water impurities and specific content of sand impurities) without separation of the flow, as well as temperature and pressure measurements in the controlled flow pipeline.

A device for monitoring gas flow and the amount of impurities in the production of gas wells, containing two piezoceramic sensors for pressure pulsations of the flow, two level comparators, two pulse shapers, the first, second and third active bandpass filters (RU p. 2249690, publ. 10.04.2005. Bull. No. 10).

The specified device provides a measurement of gas flow and separately the amount of sand and water-clay mixture in the production of gas wells in a wide range of modes of operation.

However, the known device is not intended to measure the flow rate of liquid (gas condensate, oil) in the composition of the production of gas condensate and oil wells. In addition, the use of this device to measure the amount of impurities is associated with the need to obtain a priori information on the composition of water impurities and sand impurities.

Closest to the proposed invention in technical essence and the achieved result is a device for controlling the flow of components of well products, comprising a measuring module, including one piezoceramic flow pressure pulsation sensor and matching low and high frequency amplifiers, as well as a secondary measuring device, including three active band-pass filters , controlled scaling amplifier, analog-to-digital converter, two pulse shapers and microprocessor controller with and the keyboard (RU p. 2151288, publ. 06/20/2000. Bull. No. 17). The device is designed for simultaneous separate measurement of gas flow and the amount of sand and water-clay mixture in the production of production gas wells.

The disadvantages of the known device are its limited functionality, since the device is not designed to measure the flow rate of liquid (gas condensate, oil) in the composition of gas condensate and oil wells. In addition, this device allows you to count only the number of collisions of particles of sand impurities and water impurities recorded by a piezoceramic sensor, which does not allow to obtain information on the consumption of water impurities and the specific content of sand impurities in the total production stream of gas and gas condensate wells without additional information on the composition of impurities water and sand impurities.

The technical problem to which the present invention is directed is to provide information on the production rate, separately the rate of gas and the rate of liquid (gas condensate, oil), as well as the amount of impurities (separately the consumption of water impurities and the specific content of sand impurities) in the product stream gas, gas condensate and oil wells in a wide range of changes in the operating modes of oil and gas wells in flow rate.

This problem is solved in that the device for controlling the flow of components of the well products contains pressure and temperature sensors of the monitored flow and a piezoceramic flow pressure pulsation sensor connected to the input of the broadband matching amplifier, the outputs of which are connected to the inputs of the first, second and third active bandpass filters, the output being the first active bandpass filter is connected to the first input of the amplifier with a programmable gain, the output of the second is connected to the input of the first of the third detector, and the output of the third to the input of the second detector, the output of the amplifier with a programmable gain is connected to the first input of the two-channel analog-to-digital converter, the output of the first detector is connected through a series-connected integrator and scaling amplifier to the second input of the two-channel analog-to-digital converter, and the output the second detector is connected via a level comparator to the first input of the pulse shaper, to the second input of which a clock pulse generator is connected at the alonine frequency, the outputs of a two-channel analog-to-digital converter, a scaling amplifier, a pulse shaper, and pressure and temperature sensors of the controlled flow are connected, respectively, to the first, second, third, fourth, and fifth information inputs of the microprocessor controller, the indicated outputs of which are connected to the inputs of the digital interface, and its control output is connected to the second input of the amplifier with a programmable gain.

The technical result achieved is to provide, in addition to information on the number of collisions of particles of sand impurities and water impurities per unit time, determined by exceeding the impact signal of a predetermined threshold value, information on impact parameters determined by the mass and speed of the impurity particles, due to the formation of signals proportional to the intensity of the shock.

The functioning of the proposed device is carried out in accordance with the dependencies connecting the flow rates of gas and liquid (gas condensate and oil) with the rms value of the signal in the corresponding informative frequency bands in the audio range, obtained on the basis of empirical data and presented in analytical form. The consumption of water impurities is with the rms signal value in the corresponding informative frequency band in the ultrasonic range, and the specific content of sand impurities is with the average frequency of rectangular pulses at the output of the pulse shaper, which is associated with the intensity of the impact of sand impurities:

where Q _g is the gas flow rate;

Q _W - flow rate;

Q _in - consumption of water impurities;

S _n - specific content of sand impurities;

(G ₁ , G ₂ ) - the rms values of the signals in the first and second informative frequency bands in the audio range;

G ₃ - the average rectified value of the signal in the third informative frequency band in the ultrasonic range;

F _AND - the average value of the frequency of rectangular pulses at the output of the shaper, proportional to the average rectified value of the signal of impact of sand grains in the fourth informative frequency band in the ultrasonic range.

A, B, C, D - coefficients determined at the stage of calibration at the place of operation of the device, taking into account the geometric characteristics of the measuring section associated with the individual features of the well binding and the effect of thermobaric conditions on a particular well.

The calculation of the rms value of the signal in the corresponding informative band is made according to the formula:

where j = 1, 2 is the number of the informative frequency band;

M is the number of measurement cycles;

X _i is the instantaneous value of the signal in the informative frequency band.

Calculation of the average rectified signal value in the corresponding informative frequency band is performed according to the formula:

The essence of the proposed device is illustrated by drawings, where: in FIG. 1 is a block diagram of an apparatus for monitoring flow parameters of oil and gas wells, FIG. 2 shows the algorithm of the microprocessor controller.

The device consists of a piezoceramic flow pressure pulsation sensor 1, a broadband matching amplifier 2, the first, second and third active bandpass filters 3, 4 and 5, respectively, an amplifier with programmable gain 6, the first and second detectors 7 and 8, respectively, of the integrator 9 , a comparator of level 10, a scaling DC amplifier 11, a clock pulse generator of a reference frequency 12, a pulse shaper 13, a two-channel analog-to-digital converter 14, a microprocessor a roller 15, as well as a digital interface 16. In addition, the device includes a temperature measuring transducer 17, an analog-to-digital transducer 18 and a pressure sensor 19 with a digital output.

The device is installed on the pipeline 20 at a certain distance from a special constricting device 21, designed for more intensive turbulization and the formation of a given flow structure.

The device operates as follows.

The signal from the piezoceramic sensor 1 is fed to a broadband matching amplifier 2, then it is divided into three measuring channels using three active bandpass filters 3, 4 and 5. The amplifier 2 is designed to match the high resistance of the piezoceramic sensor with the input resistance of the active bandpass filters 3, 4 and 5.

The formation of the information channel for measuring gas flow rate and fluid flow rate is as follows. The electrical signal from the matching amplifier 2 is fed to the first active bandpass filter 3, which forms an informative frequency band of the flow measurement channel. It isolates and amplifies the signal with frequency components in the range of sound frequencies (tens to hundreds of hertz). From the output of the active band-pass filter 3, the signal is fed to the first input of the amplifier with a programmable gain 6, which normalizes the measuring signal for transmission to the information processing unit in the optimal dynamic range. From the output of amplifier 6, the signal is fed to the first input of a two-channel analog-to-digital converter 14, and then to the first input of the microprocessor controller 15. Moreover, the gain of the amplifier 6 is automatically set by the microprocessor controller 15 through the control input (2). When exceeding or decreasing the signal of predetermined limits, optimal for operation of the analog-to-digital Converter 14, there is, respectively, a decrease or increase in gain with a known discrete step. The microprocessor controller 15 performs digital filtering in the first and second informative audio frequency bands, as well as calculates the gas and liquid rates in accordance with a given algorithm, and upon completion of the measurements, the obtained gas rates and liquid rates become available for reading through digital interface 16.

The formation of the information channel for measuring the flow of water impurities is as follows. The signal from the output of the matching amplifier 2 enters the second active bandpass filter 4, which selects the third informative band in the range of ultrasonic frequencies (tens to hundreds of kilohertz), the signal intensity in which is associated with the consumption of water impurities. Next, the selected signal is fed to the first detector 7, which converts the signal, and then to the integrator 9 to integrate it. The obtained value is fed to the input of the scaling DC amplifier 11, the output of which is connected to the second input of the two-channel analog-to-digital converter 14, and then to the second input of the microprocessor controller 15, which after processing in accordance with the specified algorithm transmits the obtained value of the flow of water impurities to the second input digital interface 16, where it becomes available for reading.

The formation of the information channel for measuring the specific content of sand impurities is as follows. The signal from the preliminary broadband amplifier 2 is fed to the third active bandpass filter 5, which extracts and amplifies the signal in the fourth informative frequency band of the ultrasonic range (units of megahertz), the signal intensity in which is associated with the specific content of sand impurities. Next, the filtered and amplified signal is fed to the second detector 8. The detected signal is fed to a level 10 comparator, the threshold of which is configured above the peak values of noise signals. When the useful signal amplitude exceeds the specified threshold at the input of the comparator, the comparator operates and starts the pulse shaper 13, which is a logic circuit “I”, the second input of which from the clock pulse generator of the reference frequency 12 receives rectangular pulses of the specified amplitude, duration and duty cycle. As a result, at the output of the shaper 13 during the active mode of operation, a sequence of pulses is formed. When reducing at the input of the comparator 10 the signal amplitude below the threshold level, the comparator prohibits the operation of the pulse shaper 13 and puts it into standby mode. The average frequency of the pulses received at the output of the pulse shaper 13 is calculated at the counting input (3) of the microprocessor controller 15 and after appropriate processing becomes available for reading through the digital interface 16.

The average pulse frequency at the shaper output is proportional to the intensity of the sand impact signal.

In addition, the device provides for measuring the temperature of the controlled flow by the temperature transducer 17, the output of which is connected to the input of the analog-to-digital transducer 18, and measuring the overpressure of the product flow in the pipeline at the wellhead by a sensor 20 with a digital output. The obtained temperature and pressure values are transmitted to the fourth and fifth inputs of the microprocessor controller 15, respectively.

The operation algorithm of the microprocessor controller 15 is shown in FIG. 2. It contains the following basic operators:

1 - start;

2 - self-test routine;

3 - subroutine initialization of system resources;

4 - enter the number of measurement cycles M;

5 - zeroing of the storage channels of the gas flow rate, fluid flow rate, the consumption of water impurities and the specific content of sand impurities;

6 - initialization of the gain K of the scaling amplifier;

7 - reading from the ADC of the instantaneous value of the signal X _i in an informative frequency band;

8 - accumulation of the amount (X _i ) ² ;

9 - subroutine for calculating the optimal K, taking into account the average level of the signal supplied to the first input from the output of a two-channel analog-to-digital converter;

10 - output K to the output of the microprocessor controller;

11 - verification of the end of the last measurement cycle;

12 - reset drive pulses;

13 - increase per unit of the pulse drive;

14 - verification of the end of the last measurement cycle;

15 - reading from the ADC instantaneous temperature;

16 - reading from the output of the digital pressure sensor instantaneous pressure values;

17 - calculation of the values of G _j ;

18 - calculation of gas flow rate, fluid flow rate, flow rate of water impurities and specific content of sand impurities, taking into account pressure and temperature according to formulas (1), (2), (3) and (4), respectively;

19 - output Q _g , Q _W , Q _in and S _n to the interface for reading;

20 is the end.

Claims (1)

A device for controlling the flow of components of well products, characterized in that it contains pressure and temperature sensors of the monitored flow and a piezoceramic flow pressure pulsation sensor connected to the input of a broadband matching amplifier, the outputs of which are connected to the inputs of the first, second and third active bandpass filters, the output being the first active bandpass filter is connected to the first input of the amplifier with a programmable gain, the output of the second is connected to the input of the first the output of the third to the input of the second detector, the output of the amplifier with a programmable gain is connected to the first input of the two-channel analog-to-digital converter, the output of the first detector is connected through a series-connected integrator and scaling amplifier to the second input of the two-channel analog-to-digital converter, and the output of the second the detector is connected via a level comparator to the first input of the pulse shaper, to the second input of which a clock pulse generator is connected of the second frequency, the outputs of the two-channel analog-to-digital converter, a scaling amplifier, a pulse shaper, and pressure and temperature sensors of the controlled flow are connected, respectively, to the first, second, third, fourth, and fifth information inputs of the microprocessor controller, the outputs of which are connected to the inputs of the digital interface, and its control output is connected to the second input of the amplifier with a programmable gain.

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