Device for controlling gas flow and admixtures amount in gas wells product

FIELD: gas industry.

SUBSTANCE: device has two level comparators, two pulse generators, first, second and third active band filters, first and second piezoceramic detectors of flow pressure pulses. Output of first detector is connected to input of synchronizing low frequency amplifier, output of which is connected to input of first filter, output of which is connected to first input of scaling amplifier, output of which is connected to ADC input, output of which is connected to first input of microprocessor controller, output of which is connected to second input of scaling amplifier. Additionally provided are passive two-mode filter, switchboard and fourth filter. Output of second piezoceramic detector is connected to input of two-mode passive filter, output of which is connected to input of fourth filter, output of which is connected to inputs of third and fourth filters, outputs of which are connected to inputs of first and second level comparators, outputs of which are connected to inputs of first and second pulse generators, outputs of which are connected to first and second switchboard inputs, output of which is connected to second input of controller, second output of which is connected to third input of switchboard.

EFFECT: higher efficiency and precision.

2 dwg

 

The present invention relates to the field of gas industry and can be used for measuring the gas flow and the amounts of impurities (sand and vodohranilishnoe mixture) in the production of gas wells.

A device for controlling the flow of components production wells containing piezoelectric sensor pressure pulsation flow, impedance amplifier, three active bandpass filter, scaling amplifier, analog-to-digital Converter, two comparator levels, two of the pulse shaper and the microprocessor controller (patent RF №2151288, E 21 In 47/10, 1998).

The disadvantage of this device is the low immunity, since the presence of one sensor can not distinguish the useful signals at the stage of initial conversion.

Closest to the proposed invention is a device for controlling the flow of components production wells containing two piezoceramic sensor, three matching amplifier, three active bandpass filter, scaling amplifier, two comparator level, the analog-to-digital Converter, two pulse shaper and a microprocessor controller, and a matching amplifier low pass and the first matching amplifier high-pass connected to the first piezoelectric sensor pressure pulsation (gas and p is the juice), and the second impedance amplifier high-pass connected to the second sensor (VGPS) (patent RF №2148168, E 21 In 47/10, 1998).

The disadvantage of this device is the low immunity of the gas channels and sand as useful signals are received from one sensor, resulting in reduced accuracy of the control of gas flow.

Object of the present invention is to provide a device for simultaneous, separate gas flow measurement, quantities of sand and vodohranilishnoe mixture (VGPS) in the production wells, providing a more accurate determination of the gas flow as a result of increased noise immunity on all three channels due to the physical separation of the useful signal on two informative bands low (gas) and high frequencies (sand and VGPS) with subsequent separation of the useful signal band of high frequencies on VGPS and sand on bandpass filters.

The solution of this problem is achieved that the device containing the first and second piezoelectric sensors pressure pulsation flow, the first of which is connected to the input impedance of the amplifier lower frequencies, the output of which is connected to the input of the first active bandpass filter, the output of which is connected to the first input of the scaling amplifier, the output of which is connected to the input of the analog-to-digital Converter, and o is d which is connected to the first input of microprocessor controller, the output of which is connected to the second input of the scaling amplifier, two comparator levels, two shaper pulses, microprocessor controller with data recorders products, first, second and third active bandpass filters according to the invention additionally introduced passive doodly filter, the switch and the fourth active band-pass filter, and the output of the second piezoceramic sensor is connected to the input Domodedovo passive filter, the output of which is connected to the input of the second active bandpass filter, the output of which is connected to the inputs of the third and fourth active bandpass filters whose outputs are connected to inputs of the first and second level Comparators whose outputs are connected to inputs of the first and the second pulse shapers, the outputs are connected to first and second inputs of the switch, the output of which is connected to the second input of the microprocessor controller, the second output of which is connected to the third input of the switch.

The operation of the proposed device is carried out in accordance with dependencies linking the flow of gas from the RMS value of the informative signal, and the amount of sand and vodohranilishnoe mixture to the number of pulses at the output of pulse shaper:

where: QGthe gas flow;

ToPthe amount of sand;

ToWGPSthe number vodohranilishnoe mixture;

G1and G2- the RMS value of the signal is informative in the frequency bands;

S1the number of pulses at the output of the shaper pulses during the switching of the channel sand;

S2the number of pulses at the output of the shaper pulses during the switching channel VGPS;

A, b, C are coefficients determined at the stage of calibration.

M is the number of measurement cycles;

K - coefficient gain of the scaling amplifier;

Xi- the instantaneous value of the signal information bandwidth.

A block diagram of a device for controlling gas flow and the amount of impurities in the product gas wells shown in figure 1. The device consists of first and second piezoelectric sensors, respectively, 1 and 2, the passive Domodedovo filter 3, the matching amplifier low pass 4, the first, second, third and fourth active bandpass filters, respectively 5, 6, 7 and 8, managed by the scaling amplifier 9, an analog-to-digital Converter 10, the comparator level, respectively 11 and 12, forming pulses, respectively 13 and 14, switch 15, and the microprocessor controller 16 with the display is 17, the keyboard 18 and registrars of product parameters 19.

The device operates as follows.

When forming channels "gas flow" is used the first piezoelectric sensor 1, and in the formation of the channel VGPS" and "sand" is the second piezoelectric sensor 2. This ensures efficient separation informative low-frequency and high-frequency signals of the channels, respectively, "gas flow" and "sand" with "VGPC", at the stage of primary conversion of pressure pulsations into an electric signal.

The signal from the first piezoelectric sensor 1 is supplied to the matching amplifier bass 4, which serves to amplify the signal in the corresponding informative low-frequency range. The signal from the matching amplifier bass 4 is supplied to the first active band-pass filter 6, which generates informative bandwidth of the channel "gas flow". He selects and amplifies the signal with frequency components in the range from tens to hundreds of Hertz. Output active bandpass filter 6, the signal at the first input of the scaling amplifier 9, the optimal gain which is set automatically by the microprocessor controller 16, the output of which is connected to the second input of the scaling amplifier 9. The output of the scaling amplifier connected to the input of analog-to-digital conversion max is the Converter 10, since the output of which the signal at the first input (serial digital input) microprocessor controller 16. Microprocessor controller performs the calculation in accordance with the algorithm of functioning, and at the end of the measurements obtained value is indicated on the digital display 17.

The formation of the information signals of the channels of the "sand" and "VGPC" is implemented as follows. The output signal of the second piezoelectric sensor 2 is fed to a passive doodly filter 3, which allocates the signals with frequency components in the range of greatest impact parameters "sand" and "VGPC". The signal from the passive Domodedovo filter 3 is supplied to the second active unimodal band-pass filter 5, which selects and amplifies the signals in the corresponding frequency range. The signal from the active bandpass filter 5 is fed to the inputs of the third and fourth active band-pass filters 7 and 8, which divide the signals of channels "VGPC" and "sand". Selected and amplified signals of these channels are routed to the inputs of the first and second Comparators 11 and 12, the thresholds of which are set deliberately above the noise level. When the useful signal with an amplitude above the threshold level, the comparator level trigger and trigger pulse shapers 13 and 14. The total number of pulses is you can judge the number of collisions of particles of sand and VGPS with the sensing element. The pulses from the output of the pulse shaper 13 and 14 are received respectively in the first and second inputs of the switch 15, the time of switching channels "sand" and "VGPC" is set to a microprocessor-based controller 16. From the output of the switch 15, the signal at the second input (external interrupt) microprocessor controller 16. After appropriate processing in a microprocessor-based controller, the obtained values are indicated on the digital display 17. The keyboard 18 is used to enter the parameters of the measurement process. The data recorders products 19 are designed to store the resulting values of gas consumption and amounts of impurities.

The algorithm for the microprocessor-based controller 17 shown in figure 2. It contains the following basic operators.

On the first login:

1 - start;

2 - the self-test routine;

3 - the initialization routine of system resources;

4 - keyboard input the number of cycles of dimension M;

5 - reset the drive channel of the gas flow, the amount of sand and the amount VGPS;

6 - initializing gain For scaling amplifier;

7 - initialization time of the switching channels "VGPC" and "sand";

8 - reading from ADC instantaneous values of the signal Xiin informative frequency band;

9 - the accumulation of the sum (Xi/K)2;

10, the sub - programme is asceta optimal To;

11 is output To the output of microprocessor controller;

12 - check the end of the last measuring cycle;

13 - calculation of the RMS value of G;

14 - calculation of gas flow, the amount of sand and the amount VGPS by the formulas (1), (2) and (3), respectively;

15 o QGToPand KWGPSindication;

16 - the end.

On the second input:

17 - start routine interrupt pulse shaper;

18 - reset the drive pulses;

19 - increase per unit of drive pulses;

20 - check the end time of switching;

21 - zapping "VGPC" and "sand";

22 - return to main program.

Device for controlling gas flow and the amount of impurities in the product gas wells containing the first and second piezoelectric sensors pressure pulsation flow, the first of which is connected to the input impedance of the amplifier lower frequencies, the output of which is connected to the input of the first active bandpass filter, the output of which is connected to the first input of the scaling amplifier, the output of which is connected to the input of the analog-to-digital Converter, the output of which is connected to the first input of the microprocessor controller, the output of which is connected to the second input of the scaling amplifier, two comparator levels, two fo is MyRoutes pulses, the second and third active bandpass filters, characterized in that it additionally introduced passive doodly filter, the switch and the fourth active band-pass filter, and the output of the second piezoceramic sensor is connected to the input Domodedovo passive filter, the output of which is connected to the input of the second active bandpass filter, the output of which is connected to the inputs of the third and fourth active bandpass filters whose outputs are connected to inputs of the first and second level Comparators whose outputs are connected to inputs of the first and second pulse shapers, the outputs are connected to first and second inputs of the switch, the output of which is connected to the second input of microprocessor controller the second output of which is connected to the third input of the switch.



 

Same patents:

FIELD: oil industry.

SUBSTANCE: device comprises multiple-pass well shifting connected with bullet and terminal controller connected with the turbine flow meter and well shifting. The method comprises measuring time interval before the first pulse corresponding to the measuring cycle of the turbine flow meter and determining time interval required for synchronization of the beginning of fluid accumulation in the bullet and the end of measurements from the measuring time obtained.

EFFECT: enhanced accuracy of measurements.

2 cl, 4 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes measuring average value of flow during adequately picked time for each well of group with successive - according to given program - connection of wells to measuring device and following recalculation of debit to day productiveness. At the same time the most dynamic well of group is selected on basis of one of most unstable parameters. Numeric value of relative quadratic error δ3 of average flow value m(q) is set and recorded in memory of computer, for example, industrial controller. Period of scanning for this well is determined. With same period remaining wells of the group are scanned. Scanning period for each I of them is corrected by comparison of current - actual - relative average quadratic error δmi of average flow value q1 with previously set δ3 from conditions δ≥δ3(1+K); δmi≤δ3(1-K), where K - coefficient for limiting changing range δmi, defining necessity of correction of scanning period for I well towards decrease or increase. If switching moments for measurements of two or more wells from group coincide, order of their scanning is set in accordance to decrease of productiveness of these wells.

EFFECT: higher efficiency.

2 cl, 1 ex

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes separating gas from liquid in the mixture. Liquid is periodically accumulated in calibrated gas separator tank with concurrent by-way of gas into collector and accumulated liquid is pushed out by gas with open pipeline used for draining gas into collector. During pushing away accumulated liquid by gas differential pressure between lower and upper pipeline points is additionally measured. Liquid flow in gas-liquid mixtures is calculated as total of flow of liquid filling calibrating tank, and flow of liquid, carried away by gas from separator, determined from given relation. Method is realized by device, which contains calibrating tank with inlet branch pipe for feeding gas-liquid mixture therein, pipeline for draining gas and pipeline for draining liquid, connected to collector through three-drive valve. Also, following are mounted in separator: level relay-sensor limiting calibrating volume, absolute temperature sensor, absolute pressure sensor and differential pressure sensor between lower and upper separator points. Between lower and upper pipeline points a sensor for measuring differential pressure is mounted. At entrance of pipeline dispersant is mounted for evening gas and liquid speeds.

EFFECT: higher precision.

2 cl, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes measuring volume and denseness of fresh oil in reservoir in case of even or balanced temperature and pressure. Combined sample of fresh oil is taken from pipeline during its draining and denseness of oil and bed water and ballast content is determined. Then mass of drained oil is determined with consideration of measured parameters. Prior to draining, fresh oil from reservoir is exposed until partial separation of bed water, and its denseness is measured. During draining of fresh oil, its denseness,, volumetric share of water therein, pressure and temperature are determined. Drained oil mass and percentage of ballast is determined from given mathematical expressions. Denseness of exposed bed water is measured on basis of sample, taken after exposure of fresh oil in reservoir. Denseness of exposed bed water is measured in its flow during draining from reservoir after exposure and before draining fresh oil. Volume of fresh oil in reservoir is measured continuously by its level and data from graduating table for reservoir. Draining of combined sample of fresh oil from pipeline during its draining is performed manually or automatically in case of constant kinetic condition. After exposure of fresh oil in reservoir point samples of fresh oil are taken, additional combined sample is made thereof and denseness of fresh oil, oil and bed water and ballast percentage is determined from it, and these parameters are used when evaluating precision of determining parameters of drained oil. Measurements of denseness, volumetric water share, pressure and temperature during draining of fresh oil in flow are performed periodically with averaging of current values of measured parameters for time interval, equal to period of change of parameters of fresh oil in reservoir. Mass of bed water MW is determined from given formula.

EFFECT: higher precision.

8 cl, 1 dwg

FIELD: oil extractive industry.

SUBSTANCE: mixture is separated on liquid and gas in separator. Liquid is periodically collected and forced away by gas while measuring absolute pressure and gas temperature in separator tank near upper and lower fixed liquid levels, and times of forcing away of fixed liquid volume. Additionally measured are absolute pressure and temperature in moment when liquid reaches intermediate fixed level. Then liquid is forced from intermediate fixed level to lower fixed level separator is switched off from well, and mass loss of gas is calculated from provided relation. Device for realization of method consists of separator with feeding pipe, in which a three-drive valve is mounted, and draining pipe, which through said valve is connected to liquid outlet channel and to gas outlet channel. Separator is provided with sensors of temperature and pressure and sensors of upper, intermediate and lower levels, mounted in such a manner, that they separate fixed volumes between each other in separator tank, in case of equality of which calculations are simplified.

EFFECT: higher precision.

2 cl, 1 dwg

FIELD: oil and gas production.

SUBSTANCE: invention relates to gas-liquid systems coming from oil production wells. Mixture is separated into liquid and gas in separator. Liquid is periodically accumulated in separator container and then displaced with gas. During this operation, differential pressure for liquid reaching its lower and upper recorded levels and time required for filling recorded volumes are measured as well as absolute pressure and temperature of gas in container. Liquid flow value expressed in weight is calculated using special mathematical dependence. At oil field, liquid and gas enter separator from preliminary gas intake installation or from the first separation step.

EFFECT: increased accuracy of measurement due to avoided gas density registration and excluded necessity of using strictly cylindrically-shaped measuring container.

1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: device has body with ports in lower and upper ends, main sensitive elements in form of turbines and packing elements, placed in pairs at body ends, side port made in body between main sensitive elements and converter, connected to surface equipment. In side pipe, mounted inside the body between main sensitive elements, additional sensitive element is placed in form of turbine and thermal sensor. Lower end of side pipe is connected to side port. Diameter of turbine of additional sensitive element is less than diameter of turbines of main sensitive elements. Converter is a control block mounted above body including sleeves locator and electronic microprocessor device.

EFFECT: higher precision.

1 dwg

The invention relates to the oil industry, namely the means to automatically measure the mass flow of fluids produced from oil wells, its volume flow, density, moisture content and flow of free gas

The invention relates to the oil industry

The invention relates to the oil industry and can be used in the development of multilayer oil deposits

FIELD: oil and gas extractive industry.

SUBSTANCE: device has body with ports in lower and upper ends, main sensitive elements in form of turbines and packing elements, placed in pairs at body ends, side port made in body between main sensitive elements and converter, connected to surface equipment. In side pipe, mounted inside the body between main sensitive elements, additional sensitive element is placed in form of turbine and thermal sensor. Lower end of side pipe is connected to side port. Diameter of turbine of additional sensitive element is less than diameter of turbines of main sensitive elements. Converter is a control block mounted above body including sleeves locator and electronic microprocessor device.

EFFECT: higher precision.

1 dwg

FIELD: oil and gas production.

SUBSTANCE: invention relates to gas-liquid systems coming from oil production wells. Mixture is separated into liquid and gas in separator. Liquid is periodically accumulated in separator container and then displaced with gas. During this operation, differential pressure for liquid reaching its lower and upper recorded levels and time required for filling recorded volumes are measured as well as absolute pressure and temperature of gas in container. Liquid flow value expressed in weight is calculated using special mathematical dependence. At oil field, liquid and gas enter separator from preliminary gas intake installation or from the first separation step.

EFFECT: increased accuracy of measurement due to avoided gas density registration and excluded necessity of using strictly cylindrically-shaped measuring container.

1 dwg

FIELD: oil extractive industry.

SUBSTANCE: mixture is separated on liquid and gas in separator. Liquid is periodically collected and forced away by gas while measuring absolute pressure and gas temperature in separator tank near upper and lower fixed liquid levels, and times of forcing away of fixed liquid volume. Additionally measured are absolute pressure and temperature in moment when liquid reaches intermediate fixed level. Then liquid is forced from intermediate fixed level to lower fixed level separator is switched off from well, and mass loss of gas is calculated from provided relation. Device for realization of method consists of separator with feeding pipe, in which a three-drive valve is mounted, and draining pipe, which through said valve is connected to liquid outlet channel and to gas outlet channel. Separator is provided with sensors of temperature and pressure and sensors of upper, intermediate and lower levels, mounted in such a manner, that they separate fixed volumes between each other in separator tank, in case of equality of which calculations are simplified.

EFFECT: higher precision.

2 cl, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes measuring volume and denseness of fresh oil in reservoir in case of even or balanced temperature and pressure. Combined sample of fresh oil is taken from pipeline during its draining and denseness of oil and bed water and ballast content is determined. Then mass of drained oil is determined with consideration of measured parameters. Prior to draining, fresh oil from reservoir is exposed until partial separation of bed water, and its denseness is measured. During draining of fresh oil, its denseness,, volumetric share of water therein, pressure and temperature are determined. Drained oil mass and percentage of ballast is determined from given mathematical expressions. Denseness of exposed bed water is measured on basis of sample, taken after exposure of fresh oil in reservoir. Denseness of exposed bed water is measured in its flow during draining from reservoir after exposure and before draining fresh oil. Volume of fresh oil in reservoir is measured continuously by its level and data from graduating table for reservoir. Draining of combined sample of fresh oil from pipeline during its draining is performed manually or automatically in case of constant kinetic condition. After exposure of fresh oil in reservoir point samples of fresh oil are taken, additional combined sample is made thereof and denseness of fresh oil, oil and bed water and ballast percentage is determined from it, and these parameters are used when evaluating precision of determining parameters of drained oil. Measurements of denseness, volumetric water share, pressure and temperature during draining of fresh oil in flow are performed periodically with averaging of current values of measured parameters for time interval, equal to period of change of parameters of fresh oil in reservoir. Mass of bed water MW is determined from given formula.

EFFECT: higher precision.

8 cl, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes separating gas from liquid in the mixture. Liquid is periodically accumulated in calibrated gas separator tank with concurrent by-way of gas into collector and accumulated liquid is pushed out by gas with open pipeline used for draining gas into collector. During pushing away accumulated liquid by gas differential pressure between lower and upper pipeline points is additionally measured. Liquid flow in gas-liquid mixtures is calculated as total of flow of liquid filling calibrating tank, and flow of liquid, carried away by gas from separator, determined from given relation. Method is realized by device, which contains calibrating tank with inlet branch pipe for feeding gas-liquid mixture therein, pipeline for draining gas and pipeline for draining liquid, connected to collector through three-drive valve. Also, following are mounted in separator: level relay-sensor limiting calibrating volume, absolute temperature sensor, absolute pressure sensor and differential pressure sensor between lower and upper separator points. Between lower and upper pipeline points a sensor for measuring differential pressure is mounted. At entrance of pipeline dispersant is mounted for evening gas and liquid speeds.

EFFECT: higher precision.

2 cl, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes measuring average value of flow during adequately picked time for each well of group with successive - according to given program - connection of wells to measuring device and following recalculation of debit to day productiveness. At the same time the most dynamic well of group is selected on basis of one of most unstable parameters. Numeric value of relative quadratic error δ3 of average flow value m(q) is set and recorded in memory of computer, for example, industrial controller. Period of scanning for this well is determined. With same period remaining wells of the group are scanned. Scanning period for each I of them is corrected by comparison of current - actual - relative average quadratic error δmi of average flow value q1 with previously set δ3 from conditions δ≥δ3(1+K); δmi≤δ3(1-K), where K - coefficient for limiting changing range δmi, defining necessity of correction of scanning period for I well towards decrease or increase. If switching moments for measurements of two or more wells from group coincide, order of their scanning is set in accordance to decrease of productiveness of these wells.

EFFECT: higher efficiency.

2 cl, 1 ex

FIELD: oil industry.

SUBSTANCE: device comprises multiple-pass well shifting connected with bullet and terminal controller connected with the turbine flow meter and well shifting. The method comprises measuring time interval before the first pulse corresponding to the measuring cycle of the turbine flow meter and determining time interval required for synchronization of the beginning of fluid accumulation in the bullet and the end of measurements from the measuring time obtained.

EFFECT: enhanced accuracy of measurements.

2 cl, 4 dwg

FIELD: gas industry.

SUBSTANCE: device has two level comparators, two pulse generators, first, second and third active band filters, first and second piezoceramic detectors of flow pressure pulses. Output of first detector is connected to input of synchronizing low frequency amplifier, output of which is connected to input of first filter, output of which is connected to first input of scaling amplifier, output of which is connected to ADC input, output of which is connected to first input of microprocessor controller, output of which is connected to second input of scaling amplifier. Additionally provided are passive two-mode filter, switchboard and fourth filter. Output of second piezoceramic detector is connected to input of two-mode passive filter, output of which is connected to input of fourth filter, output of which is connected to inputs of third and fourth filters, outputs of which are connected to inputs of first and second level comparators, outputs of which are connected to inputs of first and second pulse generators, outputs of which are connected to first and second switchboard inputs, output of which is connected to second input of controller, second output of which is connected to third input of switchboard.

EFFECT: higher efficiency and precision.

2 dwg

FIELD: gas industry.

SUBSTANCE: device has two piezoceramic detectors of flow pressure pulses, output of first of which is connected to input of synchronizing low frequency amplifier. Output of synchronizing amplifier is connected to input of first active band filter, output of which is connected to first input of scaling amplifier, output of which is connected to input of ADC. ADC output is connected to first input of microprocessor controller. First output of controller is connected to second input of scaling amplifier. Device also has level comparator, pulse generator, second and third active band filters, while controller is made with product parameters recorders. Additionally provided are two-mode filter, switchboard and fourth active band filter. Output of second piezoceramic detector is connected to input of two-mode passive filter, output of which is connected to input of second active band filter. Output of second filter is connected to inputs of, respectively, third and fourth filters, outputs of which are connected to first and second inputs of switchboard, connected to level comparator input. Output of the latter is connected to input of pulse generator, output of which is connected to second input of controller. Second output of controller is connected to third input of switchboard.

EFFECT: higher precision.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: device has container for marked liquid lowered on geophysical cable with depressurization assemblies and driving assemblies and measuring sensors, more than one. Measuring sensors are positioned above and below researched bed range no less than one on each side. As marked liquid, ferromagnetic liquid is used, and as measuring sensors - magnetic field measuring devices.

EFFECT: lower costs, simplified construction, higher precision.

1 dwg

Up!