Oil well yield metering device and metering method

Abstract

The invention relates to the technical field of oil well metering, in particular to an oil well yield metering device and method.The oil well yield metering device is characterized in that a pipeline expanding pipe communicated with an upper cavity is arranged on the upper portion of the upper cavity, a siphon and a communicating pipe are arranged between the upper cavity and a lower cavity, and a liquid inlet of the siphon is communicated with the upper cavity; a siphon upper bent pipe is located on the upper portion of the upper cavity, a water content measuring instrument is arranged on the siphon, and liquid level sensing units are arranged inside or outside the upper cavity and correspond to the position of the siphon upper bent pipe and the position of the siphon liquid inlet. And one end of the communicating pipe is communicated with the upper chamber at a position higher than the elbow at the upper part of the siphon. By means of the siphon principle, irregular oil-gas mixed-phase flowing of oil well products is converted into regular gas or liquid single-phase flowing, metering of the oil well products is achieved, the metering result can meet the precision requirement of oil field geology, cost is low, safety and reliability are achieved, and the automation degree is high.

Description

Technical Field

[0001] The invention relates to the technical field of oil well metering, in particular to an oil well production metering device and a metering method. Background Art

[0002] The measurement of oil well production is an important task in oilfield production management. Accurate and timely measurement of oil well production has important guiding significance for understanding reservoir conditions and formulating production plans.

[0003] At present, the commonly used oil well production measurement methods in this oil field are mainly: 1. Measuring oil with a single tank at the well site; 2. Measuring oil with a single volume separator in the metering room and measuring gas with a orifice plate; 3. Measuring oil and gas with a mass flow meter in a single volume separator in the metering room; 4. Measuring oil with a single well dynamometer. The above measurement methods have the following problems in the measurement process:

[0004] 1. Low degree of automation and high labor intensity;

[0005] 2. There is much manual involvement and low compatibility with the oilfield automation system;

[0006] 3. The detection cost of mass flow meter is high, and the reduction of the diameter of the metering pipeline poses a safety hazard;

[0007] 4. The measurement accuracy is unstable. Summary of the invention

[0008] The present invention provides an oil well production metering device and a metering method, which overcome the deficiencies of the above-mentioned prior art and can effectively solve the problems of low automation and high cost in the existing oil well production metering method.

[0009] One of the technical solutions of the present invention is achieved by the following measures: an oil well production metering device, comprising:

[0010] The metering and collecting device comprises an upper chamber and a lower chamber, wherein a pipeline expansion tube connected to the upper chamber is arranged at the upper part of the upper chamber, an output pipeline connected to the lower chamber is arranged at the bottom of the lower chamber, a siphon tube and a connecting tube are arranged between the upper chamber and the lower chamber, a liquid inlet of the siphon tube is connected to the lower part of the upper chamber, a liquid outlet of the siphon tube is connected to the upper part of the lower chamber, an upper bend of the siphon tube is located at the upper part of the upper chamber, a water content measuring instrument is arranged at the liquid outlet of the siphon tube, a liquid flow sensing unit is arranged on a tube wall on one side of the siphon tube corresponding to the liquid outlet, one end of the connecting tube is connected to the upper chamber at a position higher than the upper bend of the siphon tube, and the other end of the connecting tube is connected to the upper part of the lower chamber;

[0011] The metering and processing device measures the oil production of the oil well on that day according to the liquid flow sensing data output by the liquid flow sensing unit per unit time and the instantaneous water content output by the water content measuring instrument.

[0012] The following are further optimizations and / or improvements to the above technical solutions:

[0013] The above-mentioned metering and processing device comprises:

[0014] A front-end transmission module, communicating with the water content measuring instrument and the liquid flow sensing unit;

[0015] The metering control module determines the number of siphon times per unit time and the corresponding average comprehensive water content according to the liquid flow sensing data output by the liquid flow sensing unit per unit time and the instantaneous water content output by the water content measuring instrument, and measures the oil production of the oil well on that day.

[0016] The above also includes an upper liquid level sensing unit and a lower liquid level sensing unit. The upper liquid level sensing unit is arranged inside or outside the upper chamber at a position corresponding to the upper bend of the siphon tube, and the lower liquid level sensing unit is arranged inside or outside the upper chamber at a position corresponding to the liquid inlet of the siphon tube.

[0017] The above-mentioned metering processing device also includes a timing module;

[0018] A front-end transmission module communicates with the water content measuring instrument, the liquid flow sensing unit, the upper liquid level sensing unit, and the lower liquid level sensing unit;

[0019] The timing module uses the liquid level data initially collected by the following liquid level sensing unit at the liquid inlet of the siphon pipe as the start trigger condition, and the liquid level data initially collected by the following liquid level sensing unit at the upper bend of the siphon pipe as the stop trigger condition for timing, and obtains the corresponding liquid level rise time when each siphon occurs within a unit time;

[0020] The metering control module determines the average liquid level rise time and average comprehensive water content corresponding to a siphon occurrence per unit time, and measures the oil production of the oil well on that day.

[0021] The above-mentioned metering and processing device also includes a rear-end transmission module for transmitting the oil well liquid production to a remote end.

[0022] The above also includes a gas collection unit, and a gas measurement unit is arranged on the connecting pipe to measure the gas flowing through the connecting pipe.

[0023] The second technical solution of the present invention is achieved by the following measures: A method for measuring oil well production, comprising:

[0024] The gas-liquid mixture produced by the oil well is initially separated from the liquid by the pipeline expansion pipe, and then enters the upper chamber for further separation of gas and liquid;

[0025] The gas after gas-liquid separation gathers at the upper part of the upper chamber, enters the lower chamber through the connecting pipe, and flows out through the output pipeline together with the liquid in the lower chamber. The liquid after gas-liquid separation gathers at the bottom of the upper chamber, and the liquid level gradually rises;

[0026] When the liquid level in the upper chamber exceeds the position of the upper bend of the siphon tube, a siphon phenomenon occurs, and the liquid flows into the lower chamber through the siphon tube outlet. The liquid flow sensing unit and the water content measuring instrument obtain liquid flow sensing data and instantaneous water content. The gas in the lower chamber enters the upper chamber through the connecting pipe. When the liquid level in the upper chamber drops below the liquid inlet of the siphon tube, the siphon phenomenon stops, and the liquid level starts to rise again until the siphon phenomenon occurs again, and the cycle repeats.

[0027] The metering processing device determines the oil production of the oil well on the metering day according to the liquid flow sensing data output by the liquid flow sensing unit per unit time and the instantaneous water content output by the water content measuring instrument.

[0028] The following are further optimizations and / or improvements to the above technical solutions:

[0029] The above-mentioned metering processing device determines the oil production of the oil well on the day of measurement according to the liquid flow sensing data output by the liquid flow sensing unit per unit time and the instantaneous water content output by the water content measuring instrument, including:

[0030] The front-end transmission module communicates with the water content measuring instrument and the liquid flow sensing unit to obtain the liquid flow sensing data output by the liquid flow sensing unit and the instantaneous water content output by the water content measuring instrument per unit time;

[0031] The metering control module determines the number of siphons per unit time and the corresponding average comprehensive water content per unit time, and calculates the oil production V of the oil well on that day by combining the following formula: 油 :

[0032]

[0033] Among them, t 单位 is the unit time; n is the siphonage that occurs in the unit time; V 虹吸 is the volume of liquid corresponding to one siphon; is the average comprehensive moisture content per unit time, P 1 is the instantaneous moisture content, and k is the number of instantaneous moisture content output by the moisture measuring instrument per unit time.

[0034] The above also includes that the upper liquid level sensing unit and the lower liquid level sensing unit collect liquid level data at corresponding positions, and the metering processing device uses the liquid level data to obtain the corresponding liquid level rise time when each siphon occurs within a unit time, and combines the liquid level rise time corresponding to each siphon occurrence and all instantaneous water contents collected by the water content measuring instrument to measure the oil production of the oil well, including:

[0035] The liquid level data initially collected by the following liquid level sensing unit at the liquid inlet of the siphon is used as the start trigger condition, and the liquid level data initially collected by the following liquid level sensing unit at the upper bend of the siphon is used as the stop trigger condition for timing. The timing module obtains the corresponding liquid level rise time when each siphon occurs within a unit time;

[0036] The metering control module determines the average liquid level rising time and average comprehensive water content corresponding to each siphon occurrence based on the liquid level rising time corresponding to each siphon occurrence in unit time and the instantaneous water content collected by the water content measuring instrument during each siphon occurrence, and measures the liquid production of the oil well.

[0037] The metering control module determines the average liquid level rise time and average comprehensive water content corresponding to each siphon occurrence according to the liquid level rise time corresponding to each siphon occurrence in unit time and the instantaneous water content collected by the water content measuring instrument during each siphon occurrence, and measures the liquid production of the oil well, including:

[0038] Calculate the average liquid level rise time and average comprehensive water content corresponding to a siphon occurrence;

[0039]

[0040]

[0041] in, is the average liquid level rise time corresponding to a siphon occurrence; t 1 is the liquid level rise time corresponding to a certain occurrence in unit time; m is the total number of siphoning occurrences in unit time; is the average comprehensive moisture content corresponding to a siphoning occurrence; is the average comprehensive water content corresponding to a certain siphon occurrence in unit time, P 1 is the instantaneous water content collected when a siphon occurs in a unit time, and n is the number of instantaneous water contents collected when a siphon occurs in a unit time;

[0042] Calculate the oil production V of the oil well on that day 油 :

[0043]

[0044] in, V is the average liquid level rise time corresponding to a siphon occurrence; 虹吸 is the volume of liquid corresponding to one siphon; It is the average comprehensive moisture content corresponding to a siphoning occurrence.

[0045] The present invention utilizes the siphon principle to transform the oil well output from irregular oil-gas mixed phase flow into regular gas or liquid single phase flow, thereby achieving the metering of the oil well output. The metering result can meet the accuracy requirements of oil field geology, and the invention has low cost, safety, reliability and high degree of automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Attached Figure 1 It is a schematic diagram of the structure of the metering and collecting device of the present invention.

[0047] Attached Figure 2 The figure is a schematic diagram of the circuit structure of a device of the present invention.

[0048] Attached Figure 3 This is a schematic diagram of the circuit structure of another device of the present invention.

[0049] Attached Figure 4 The figure is a schematic diagram of the circuit structure of another device of the present invention.

[0050] Attached Figure 5 The present invention is a flow chart of a method.

[0051] Attached Figure 6 The present invention is another method flow chart.

[0052] The codes in the accompanying drawings are: 1 is an upper chamber, 2 is a lower chamber, 3 is a pipeline expansion pipe, 4 is an output pipeline, 5 is a connecting pipe, 6 is a water content measuring instrument, 7 is a gas collection unit, 8 is a siphon, 9 is a liquid flow sensing unit, 10 is an upper liquid level sensing unit, and 11 is a lower liquid level sensing unit. DETAILED DESCRIPTION

[0053] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0054] The present invention will be further described below in conjunction with embodiments and drawings:

[0055] Embodiment 1: As attached Figure 1 , 2 As shown, an embodiment of the present invention discloses an oil well production metering device, comprising:

[0056] A metering and collecting device comprises an upper chamber 1 and a lower chamber 2, wherein a pipeline expansion tube 3 connected to the upper chamber 1 is arranged at the upper part of the upper chamber 1, an output pipeline 4 connected to the lower chamber 2 is arranged at the bottom of the lower chamber 2, a siphon tube 8 and a connecting tube 5 are arranged between the upper chamber 1 and the lower chamber 2, a liquid inlet of the siphon tube 8 is connected to the upper part of the upper chamber 1, a liquid outlet of the siphon tube 8 is connected to the lower part of the lower chamber 2, an upper bend of the siphon tube 8 is located at the upper part of the upper chamber 1, a water content measuring instrument 6 is arranged at the liquid outlet of the siphon tube 8, a liquid flow sensing unit 9 is arranged on a tube wall on one side of the siphon tube 1 corresponding to the liquid outlet, one end of the connecting tube 5 is connected to the upper chamber 1 at a position higher than the upper bend of the siphon tube 8, and the other end of the connecting tube 5 is connected to the upper part of the lower chamber 2;

[0057] The metering and processing device measures the oil production of the oil well on that day according to the liquid flow sensing data output by the liquid flow sensing unit 9 and the instantaneous water content output by the water content measuring instrument 6 per unit time.

[0058] The invention discloses an oil well production metering device, which utilizes the siphon principle to transform the oil well output from irregular oil and gas mixed phase flow into regular gas or liquid single phase flow, thereby achieving the metering of the oil well output. The metering result can meet the accuracy requirements of oil field geology, and the device has low cost, safety, reliability and high automation.

[0059] Specifically include:

[0060] (i) After the gas-liquid mixture produced by the oil well is initially separated by the pipeline expansion pipe 3, it enters the upper chamber 1 for gas-liquid separation again. The gas passes through the upper part of the upper chamber 1 and enters the lower chamber 2 through the connecting pipe 5, and flows out through the output pipeline 4 together with the liquid in the lower chamber 2. The liquid gathers at the bottom of the upper chamber 1, and the liquid level gradually rises. When the liquid level exceeds the upper bend of the siphon pipe, a siphon phenomenon occurs. The liquid flows into the lower chamber 2 through the siphon pipe inlet, and the gas in the lower chamber 2 enters the upper chamber 1 through the connecting pipe 4. When the liquid level in the upper chamber 1 drops to the siphon pipe inlet, the siphon phenomenon stops, and then the liquid level starts to rise again until the siphon phenomenon occurs again, and the cycle repeats.

[0061] (ii) As attached Figure 2 As shown, the metering processing device comprises:

[0062] A front-end transmission module, communicating with the water content measuring instrument 6 and the liquid flow sensing unit;

[0063] The metering control module determines the number of siphons per unit time and the corresponding average comprehensive water content per unit time based on the liquid flow sensing data output by the liquid flow sensing unit per unit time and the instantaneous water content output by the water content measuring instrument, and measures the oil production V of the oil well on that day. 油 :

[0064]

[0065] Among them, t 单位 is the unit time; n is the number of siphons occurring in the unit time; V 虹吸 is the volume of liquid corresponding to one siphon; is the average comprehensive moisture content per unit time, P 1 is the instantaneous moisture content, and k is the number of instantaneous moisture content output by the moisture measuring instrument per unit time.

[0066] The number of siphons occurring per unit time is determined based on the liquid flow sensing data output by the liquid flow sensing unit per unit time. For example, if the liquid flow sensing unit continuously collects liquid flow sensing data, it is determined that siphoning is occurring. If the liquid flow sensing unit collects liquid flow sensing data again after a certain period of time after the last time the liquid flow sensing data was collected, it is determined that a new siphon has occurred, thereby determining the number of siphons occurring per unit time.

[0067] Embodiment 2: As attached Figure 1 , 3 As shown, an embodiment of the present invention discloses an oil well production metering device, comprising:

[0068] The metering and collecting device comprises an upper chamber 1 and a lower chamber 2. A pipeline expansion pipe 3 connected to the upper chamber 1 is arranged at the upper part of the upper chamber 1. An output pipeline 4 connected to the lower chamber 2 is arranged at the bottom of the lower chamber 2. A siphon tube 8 and a connecting pipe 5 are arranged between the upper chamber 1 and the lower chamber 2. The liquid inlet of the siphon tube is connected to the upper part of the upper chamber 1, and the liquid outlet of the siphon tube is connected to the lower part of the lower chamber 2. The upper bend of the siphon tube 8 is located at the upper part of the upper chamber 1. A water-containing liquid is provided at the liquid outlet of the siphon tube 8. The measuring instrument 6 is provided with a liquid flow sensing unit 9 on the tube wall on one side corresponding to the liquid outlet of the siphon tube 1, one end of the connecting tube 5 is connected with the upper chamber 1 at a position higher than the upper bend of the siphon tube 8, and the other end of the connecting tube 5 is connected with the upper part of the lower chamber 2, an upper liquid level sensing unit 10 is provided inside or outside the upper chamber 1 at a position corresponding to the upper bend of the siphon tube 8, and a lower liquid level sensing unit 11 is provided inside or outside the upper chamber 1 at a position corresponding to the liquid inlet of the siphon tube 8;

[0069] The metering and processing device uses the liquid level data to obtain the liquid level rise time corresponding to each siphon occurrence per unit time, and combines the liquid level rise time corresponding to each siphon occurrence with all instantaneous water contents collected by the water content measuring instrument to measure the oil production of the oil well.

[0070] The above-mentioned lower limit liquid level sensing module 11 and upper limit liquid level sensing module 10 can both be liquid level sensors, wherein the lower limit liquid level sensing module 11 is arranged at the liquid inlet position of the siphon tube 8, and can also be slightly higher than the liquid inlet position of the siphon tube 8, and the upper limit liquid level sensing module 10 is arranged at the upper bend position of the siphon tube 8, and can also be slightly lower than the upper bend position of the siphon tube 8, so that the metering and processing device can accurately determine the corresponding liquid level rise time when a siphon occurs.

[0071] Specifically include:

[0072] (i) After the gas-liquid mixture produced by the oil well is initially separated by the pipeline expansion pipe 3, it enters the upper chamber 1 for gas-liquid separation again. The gas passes through the upper part of the upper chamber 1 and enters the lower chamber 2 through the connecting pipe 5, and flows out through the output pipeline 4 together with the liquid in the lower chamber 2. The liquid gathers at the bottom of the upper chamber 1, and the liquid level gradually rises. When the liquid level exceeds the upper bend of the siphon pipe, a siphon phenomenon occurs. The liquid flows into the lower chamber 2 through the siphon pipe inlet, and the gas in the lower chamber 2 enters the upper chamber 1 through the connecting pipe 4. When the liquid level in the upper chamber 1 drops to the siphon pipe inlet, the siphon phenomenon stops, and then the liquid level starts to rise again until the siphon phenomenon occurs again, and the cycle repeats.

[0073] (ii) As attached Figure 3 As shown, the metering processing device comprises:

[0074] A front-end transmission module communicates with the water content measuring instrument 6, the liquid flow sensing unit 9, the upper liquid level sensing unit 10 and the lower liquid level sensing unit 11;

[0075] The timing module uses the liquid level data initially collected by the lower liquid level sensing unit 11 at the liquid inlet of the siphon tube 8 as the start trigger condition, and uses the liquid level data initially collected by the upper liquid level sensing unit 10 at the upper bend of the siphon tube 8 as the stop trigger condition to perform timing, and obtain the corresponding liquid level rise time when each siphon occurs within a unit time;

[0076] The metering control module can determine the number of siphoning times per unit time and the corresponding average comprehensive water content per unit time based on the liquid flow sensing data output by the liquid flow sensing unit 9 per unit time and the instantaneous water content output by the water content measuring instrument, and measure the oil production of the oil well on that day. It can also determine the average liquid level rising time and the average comprehensive water content corresponding to a siphoning occurrence per unit time, and measure the oil production of the oil well on that day.

[0077] Specifically, according to the liquid flow sensing data output by the liquid flow sensing unit 9 and the instantaneous water content output by the water content measuring instrument in a unit time, the number of siphons in a unit time and the corresponding average comprehensive water content in a unit time are determined, and the process of measuring the oil production of the oil well on the day is as described in the embodiment. The oil production of the oil well obtained in this way can be used as a preliminary measurement for use in scenarios with large measurement requirements and no strict requirements on accuracy. The method of determining the average liquid level rise time and the average comprehensive water content corresponding to a siphon occurrence in a unit time and measuring the oil production of the oil well on the day is suitable for scenarios with strict requirements on accuracy.

[0078] The average liquid level rise time and average comprehensive water content corresponding to a siphon occurrence in unit time are determined, and the oil production of the oil well on that day is measured using the following formula:

[0079]

[0080] in, V is the average liquid level rise time corresponding to a siphon occurrence; 虹吸 is the liquid volume corresponding to one siphoning, which can be specifically calculated using the average liquid level rising time and the volume coefficient of the upper chamber 1; It is the average comprehensive moisture content corresponding to a siphoning occurrence.

[0081] Embodiment 3: As attached Figure 1 , 4 As shown, an embodiment of the present invention discloses an oil well production metering device, which is an optimization of the above embodiment and further includes a gas collection unit 7. The gas measurement unit is arranged on the connecting pipe 5 to measure the gas flowing through the connecting pipe 5.

[0082] The gas measuring unit 7 is arranged on the connecting pipe 5. The gas measuring unit 7 may be a natural gas measuring instrument, which collects the gas flowing through the connecting pipe 5 and sends it to the metering processing device to measure the gas production of the oil well.

[0083] Calculation of gas production of specific oil wells includes:

[0084]

[0085] in, is the average liquid level rise time corresponding to a siphon occurrence; q气 It is the value of the gas flow measured by the gas measurement unit 7 during the average liquid level rising time.

[0086] Embodiment 4: The embodiment of the present invention discloses an oil well production metering device, which is an optimization of the above embodiment, wherein the metering processing device also includes a back-end transmission module to transmit the oil well production volume to a remote end.

[0087] The back-end transmission module is provided as described above, so that the data received and measured by the measurement processing device can be sent to a remote end.

[0088] Embodiment 5: As attached Figure 5 As shown, an embodiment of the present invention discloses a method for measuring oil well production, which is characterized by comprising:

[0089] Step S101, the gas-liquid mixture produced by the oil well is initially separated from the liquid by the pipeline expansion pipe 3, and then enters the upper chamber 1 for gas-liquid separation again;

[0090] Step S102, the gas after gas-liquid separation gathers at the upper part of the upper chamber 1, enters the lower chamber 2 through the connecting pipe 5, and flows out through the output pipeline 4 together with the liquid in the lower chamber 2, and the liquid after gas-liquid separation gathers at the bottom of the upper chamber 1, and the liquid level gradually rises;

[0091] Step S103, when the liquid level in the upper chamber 1 exceeds the upper bend position of the siphon tube 8, a siphon phenomenon occurs, and the liquid flows into the lower chamber 2 through the liquid outlet of the siphon tube 8, and the liquid flow sensing unit 9 and the water content measuring instrument 6 obtain liquid flow sensing data and instantaneous water content, and the gas in the lower chamber 2 enters the upper chamber 1 through the connecting pipe 5. When the liquid level in the upper chamber 1 drops below the liquid inlet of the siphon tube 8, the siphon phenomenon stops and the liquid level starts to rise until the siphon phenomenon occurs again, and the cycle is repeated;

[0092] Step S104, the metering processing device determines the oil production of the oil well on the metering day according to the liquid flow sensing data output by the liquid flow sensing unit per unit time and the instantaneous water content output by the water content measuring instrument.

[0093] The above step S104 specifically includes:

[0094] (1) The front-end transmission module communicates with the water content measuring instrument and the liquid flow sensing unit to obtain the liquid flow sensing data output by the liquid flow sensing unit and the instantaneous water content output by the water content measuring instrument per unit time;

[0095] (II) The metering control module determines the number of siphons per unit time and the average comprehensive water content corresponding to each siphon, and calculates the oil production V of the oil well on that day by the following formula: 油 :

[0096]

[0097] Among them, t 单位 is the unit time; n is the siphonage that occurs in the unit time; V 虹吸 is the volume of liquid corresponding to one siphon; is the average comprehensive moisture content per unit time, P 1is the instantaneous moisture content, and k is the number of instantaneous moisture content output by the moisture measuring instrument per unit time.

[0098] Embodiment 6: As attached Figure 6 As shown, an embodiment of the present invention discloses a method for measuring oil well production, which is characterized by comprising:

[0099] Step S201, the gas-liquid mixture produced by the oil well is initially separated from the liquid by the pipeline expansion pipe 3, and then enters the upper chamber 1 for gas-liquid separation again;

[0100] Step S202, the gas after gas-liquid separation gathers at the upper part of the upper chamber 1, enters the lower chamber 2 through the connecting pipe 5, and flows out through the output pipeline 4 together with the liquid in the lower chamber 2, and the liquid after gas-liquid separation gathers at the bottom of the upper chamber 1, and the liquid level gradually rises;

[0101] Step S203, when the liquid level in the upper chamber 1 exceeds the upper bend position of the siphon tube 8, a siphon phenomenon occurs, and the liquid flows into the lower chamber 2 through the liquid outlet of the siphon tube 8, and the liquid flow sensing unit 9 and the water content measuring instrument 6 obtain liquid flow sensing data and instantaneous water content, and the gas in the lower chamber 2 enters the upper chamber 1 through the connecting pipe 5. When the liquid level in the upper chamber 1 drops below the liquid inlet of the siphon tube 8, the siphon phenomenon stops and the liquid level starts to rise until the siphon phenomenon occurs again, and the cycle is repeated;

[0102] In step S204, the upper liquid level sensing unit 10 and the lower liquid level sensing unit 11 collect liquid level data at corresponding positions, and the metering and processing device uses the liquid level data to obtain the liquid level rise time corresponding to each siphon occurrence per unit time, and combines the liquid level rise time corresponding to each siphon occurrence and all instantaneous water contents collected by the water content measuring instrument to measure the oil production of the oil well.

[0103] The above step S204 specifically includes:

[0104] (i) The liquid level data initially collected by the following liquid level sensing unit at the liquid inlet of the siphon pipe is used as the start trigger condition, and the liquid level data initially collected by the following liquid level sensing unit at the upper bend of the siphon pipe is used as the stop trigger condition for timing, and the timing module obtains the liquid level rise time corresponding to each siphon occurrence within a unit time;

[0105] (ii) the metering control module determines the corresponding average comprehensive water content according to the corresponding liquid level rising time when each siphon occurs in unit time, and then determines the corresponding average liquid level rising time and average comprehensive water content when a siphon occurs again, and measures the liquid production of the oil well, including:

[0106] (1) Calculate the average liquid level rise time and average comprehensive water content corresponding to a siphon occurrence;

[0107]

[0108]

[0109] in, is the average liquid level rise time corresponding to a siphon occurrence; t 1 is the liquid level rise time corresponding to a certain occurrence in unit time; m is the total number of siphoning occurrences in unit time; is the average comprehensive moisture content corresponding to a siphoning occurrence; is the average comprehensive water content corresponding to a certain siphon occurrence in unit time, P 1 is the instantaneous water content collected when a siphon occurs in a unit time, and n is the number of instantaneous water contents collected when a siphon occurs in a unit time;

[0110]

[0111] in, V is the average liquid level rise time corresponding to a siphon occurrence; 虹吸 is the liquid volume corresponding to one siphoning, which can be specifically calculated using the average liquid level rising time and the volume coefficient of the upper chamber 1; It is the average comprehensive moisture content corresponding to a siphoning occurrence.

[0112] In the above-mentioned embodiment 6, the liquid flow sensing unit 9 and the water content measuring instrument 6 can also be executed synchronously to obtain the liquid flow sensing data and the instantaneous water content. The metering processing device determines the process of measuring the oil production of the oil well on the day according to the liquid flow sensing data output by the liquid flow sensing unit and the instantaneous water content output by the water content measuring instrument per unit time, thereby obtaining the oil production of the oil well by two methods, and comprehensively evaluating the oil production of the oil well with the two metering results, so that the oil production measurement of the oil well is more accurate.

[0113] In the above-mentioned Embodiment 5 and Embodiment 6, the gas collection unit 7 can be further used to collect the gas flowing through the connecting pipe 5 and send it to the metering processing device to measure the gas production of the oil well, enrich the functions of the present invention and improve the utilization rate. The back-end transmission module can also be further used to transmit the oil well liquid production and oil well gas production to the remote end, effectively realizing the communication between the front end and the remote end.

[0114] The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. An oil well production metering device, characterized in that: include: The metering and collecting device comprises an upper chamber and a lower chamber, wherein a pipeline expansion tube connected to the upper chamber is arranged at the upper part of the upper chamber, an output pipeline connected to the lower chamber is arranged at the bottom of the lower chamber, a siphon tube and a connecting tube are arranged between the upper chamber and the lower chamber, a liquid inlet of the siphon tube is connected to the lower part of the upper chamber, a liquid outlet of the siphon tube is connected to the upper part of the lower chamber, an upper bend of the siphon tube is located at the upper part of the upper chamber, a water content measuring instrument is arranged at the liquid outlet of the siphon tube, a liquid flow sensing unit is arranged on a tube wall on one side of the siphon tube corresponding to the liquid outlet, one end of the connecting tube is connected to the upper chamber at a position higher than the upper bend of the siphon tube, and the other end of the connecting tube is connected to the upper part of the lower chamber; The metering and processing device measures the oil production of the oil well on that day according to the liquid flow sensing data output by the liquid flow sensing unit per unit time and the instantaneous water content output by the water content measuring instrument.

2. The oil well production metering device according to claim 1, characterized in that: The metering processing device comprises: A front-end transmission module, communicating with the water content measuring instrument and the liquid flow sensing unit; The metering control module determines the number of siphon times per unit time and the corresponding average comprehensive water content according to the liquid flow sensing data output by the liquid flow sensing unit per unit time and the instantaneous water content output by the water content measuring instrument, and measures the oil production of the oil well on that day.

3. The oil well production metering device according to claim 1 or 2, characterized in that: It also includes an upper liquid level sensing unit and a lower liquid level sensing unit. The upper liquid level sensing unit is arranged inside or outside the upper chamber at a position corresponding to the upper bend of the siphon tube, and the lower liquid level sensing unit is arranged inside or outside the upper chamber at a position corresponding to the liquid inlet of the siphon tube.

4. The oil well production metering device according to claim 3, characterized in that: The metering processing device further includes a timing module; A front-end transmission module communicates with the water content measuring instrument, the liquid flow sensing unit, the upper liquid level sensing unit, and the lower liquid level sensing unit; The timing module uses the liquid level data initially collected by the following liquid level sensing unit at the liquid inlet of the siphon pipe as the start trigger condition, and the liquid level data initially collected by the following liquid level sensing unit at the upper bend of the siphon pipe as the stop trigger condition for timing, and obtains the corresponding liquid level rise time when each siphon occurs within a unit time; The metering control module determines the average liquid level rise time and average comprehensive water content corresponding to a siphon occurrence per unit time, and measures the oil production of the oil well on that day.

5. The oil well production metering device according to claim 2 or 3, characterized in that: The metering and processing device also includes a rear-end transmission module for transmitting the oil well fluid production to a remote end.

6. The oil well production metering device according to any one of claims 1 to 5, characterized in that: It also includes a gas collection unit, and a gas measurement unit is arranged on the connecting pipe to measure the gas flowing through the connecting pipe.

7. A method for measuring oil well production using the device as claimed in any one of claims 1 to 6, characterized in that: include: The gas-liquid mixture produced by the oil well is initially separated from the liquid by the pipeline expansion pipe, and then enters the upper chamber for further separation of gas and liquid; The gas after gas-liquid separation gathers at the upper part of the upper chamber, enters the lower chamber through the connecting pipe, and flows out through the output pipeline together with the liquid in the lower chamber. The liquid after gas-liquid separation gathers at the bottom of the upper chamber, and the liquid level gradually rises; When the liquid level in the upper chamber exceeds the position of the upper bend of the siphon tube, a siphon phenomenon occurs, and the liquid flows into the lower chamber through the siphon tube outlet. The liquid flow sensing unit and the water content measuring instrument obtain liquid flow sensing data and instantaneous water content. The gas in the lower chamber enters the upper chamber through the connecting pipe. When the liquid level in the upper chamber drops below the liquid inlet of the siphon tube, the siphon phenomenon stops, and the liquid level starts to rise again until the siphon phenomenon occurs again, and the cycle repeats. The metering processing device determines the oil production of the oil well on the metering day according to the liquid flow sensing data output by the liquid flow sensing unit per unit time and the instantaneous water content output by the water content measuring instrument.

8. The oil well production measurement method according to claim 7, characterized in that: The metering processing device determines the oil production of the oil well on the day of measurement according to the liquid flow sensing data output by the liquid flow sensing unit per unit time and the instantaneous water content output by the water content measuring instrument, including: The front-end transmission module communicates with the water content measuring instrument and the liquid flow sensing unit to obtain the liquid flow sensing data output by the liquid flow sensing unit and the instantaneous water content output by the water content measuring instrument per unit time; The metering control module determines the number of siphons per unit time and the corresponding average comprehensive water content per unit time, and calculates the oil production V of the oil well on that day by combining the following formula: 油 : Among them, t 单位 is the unit time; n is the number of siphons occurring in the unit time; V 虹吸 is the volume of liquid corresponding to one siphon; is the average comprehensive moisture content per unit time, P1 is the instantaneous moisture content, and k is the instantaneous moisture content output by the moisture measuring instrument per unit time.

9. The oil well production measurement method according to claim 7 or 8, characterized in that: It also includes an upper liquid level sensing unit and a lower liquid level sensing unit collecting liquid level data at corresponding positions, and a metering processing device uses the liquid level data to obtain the corresponding liquid level rise time when each siphon occurs within a unit time, and combines the liquid level rise time corresponding to each siphon occurrence and all instantaneous water contents collected by the water content measuring instrument to measure the oil production of the oil well, including: The liquid level data initially collected by the following liquid level sensing unit at the liquid inlet of the siphon is used as the start trigger condition, and the liquid level data initially collected by the following liquid level sensing unit at the upper bend of the siphon is used as the stop trigger condition for timing. The timing module obtains the corresponding liquid level rise time when each siphon occurs within a unit time; The metering control module determines the average liquid level rising time and average comprehensive water content corresponding to each siphon occurrence according to the liquid level rising time corresponding to each siphon occurrence in unit time and the instantaneous water content collected by the water content measuring instrument during each siphon occurrence, and measures the liquid production of the oil well.

10. The oil well production measurement method according to claim 9, characterized in that: The metering control module determines the average liquid level rising time and the average comprehensive water content corresponding to each siphon occurrence according to the liquid level rising time corresponding to each siphon occurrence in unit time and the instantaneous water content collected by the water content measuring instrument during each siphon occurrence, and measures the liquid production of the oil well, including: Calculate the average liquid level rise time and average comprehensive water content corresponding to a siphon occurrence; in, is the average liquid level rise time corresponding to a siphon occurrence; t1 is the liquid level rise time corresponding to a certain occurrence per unit time; m is the total number of siphon occurrences per unit time; is the average comprehensive moisture content corresponding to a siphoning occurrence; is the average comprehensive water content corresponding to a certain siphon occurrence in unit time, P1 is the instantaneous water content collected when a siphon occurs in a unit time, and n is the number of instantaneous water contents collected when a siphon occurs in a unit time; Calculate the oil production V of the oil well on that day 油 : in, V is the average liquid level rise time corresponding to a siphon occurrence; 虹吸 is the volume of liquid corresponding to one siphon; It is the average comprehensive moisture content corresponding to a siphoning occurrence.

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