CN101333926B - Oil gas water flow measurement system possessing automatic control device - Google Patents
Oil gas water flow measurement system possessing automatic control device Download PDFInfo
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- CN101333926B CN101333926B CN2008101125634A CN200810112563A CN101333926B CN 101333926 B CN101333926 B CN 101333926B CN 2008101125634 A CN2008101125634 A CN 2008101125634A CN 200810112563 A CN200810112563 A CN 200810112563A CN 101333926 B CN101333926 B CN 101333926B
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Abstract
The invention relates to an oil-gas-water flow measurement system which is provided with a self-control device and comprises a metering portal pipe used for conveying the oil-gas-water mixture material, a high-low pressure control device arranged on the metering portal pipe, an integrated three-phase flow meter which is arranged on the metering portal pipe and positioned behind the high-low pressure control device, a site secondary instrument connected with the integrated three-phase flow meter and used for supplying power for the integrated three-phase flow meter, collecting the electrical signal of the integrated three-phase flow meter and calculating the flow rates of oil, gas and water three phases and an industrial control computer which is connected with the site secondary instrument through a communication cable and used for displaying the flow rates of oil, water and gas in real-time and storing the flow rate data of oil, water and gas. The integrated three-phase flow meter comprises a venturi device, a conductivity measuring sensor, a capacitance measuring sensor and a Gamma densimeter. The oil-gas-water flow measurement system has the advantages of accurately measuring the water content of the condensate oil of the high-pressure condensate gas well, realizing the online monitoring of the oil gas well and becoming more practical.
Description
Technical field
The present invention relates to a kind of Flow Measuring System of field of petroleum exploitation, particularly relate to a kind of oil gas water flow measurement system of tool self-con-tained unit.
Background technology
At present, in the development process of high-pressure condensate gas field, there is the problem that water content in condensate can't accurate-metering always.The condensate gas central treating station adopts the mode of gas-liquid separator, flow meter and analytical test to carry out oil-gas-water metering usually.Large (the 2000m of Tarim Basin high-pressure condensate gas gas well gas oil ratio
3More than/t), large (the nearly 0.4t/m of profit density contrast
3) etc. characteristics, existing technological process is difficult to get representational oil mixing with water sample, can not grasp individual well moisture content and variation tendency, can't correctly carry out oil reservoir development dynamic analysis and development plan and adjust in good time, have a strong impact on the in time supporting of effect of reservoir development and oil gas treatment system.Simultaneously, because measurement of water-content coefficient is inaccurate, can't effectively take anticorrosive measure.
This shows, above-mentioned existing oil gas water flow measurement system obviously still has inconvenience and defective, and demands urgently further being improved in structure and use.The inventor is based on being engaged in this type of product design manufacturing abundant practical experience and professional knowledge for many years, positive research and innovation in addition, oil gas water flow measurement system to the tool self-con-tained unit of founding a kind of new structure, can improve general existing oil gas water flow measurement system, make it have more practicality.
Summary of the invention
Main purpose of the present invention is, overcome the defective that existing oil-gas-water three phase flow quantity measuring system exists, and provide a kind of oil gas water flow measurement system of new tool self-con-tained unit, technical problem to be solved is can Measurement accuracy high-pressure condensate gas well condensate water content, realize the Oil/gas Well on-line monitoring, thereby more be suitable for practicality, and have the value on industry.
The object of the invention to solve the technical problems realizes by the following technical solutions.The oil gas water flow measurement system of a kind of tool self-con-tained unit that proposes according to the present invention is used for measuring the flow of individual well oil gas water, and it comprises: the metering header, for delivery of the mixture of oil, water and gas material; The high-low pressure control device is arranged on the metering header; Three-phase does not separate flow meter, is arranged on the metering header and after being positioned at above-mentioned high-low pressure control device, is used for real time measure oil gas water instantaneous delivery; On-the-spot secondary meter does not separate flow meter with above-mentioned three-phase and is connected, and being used for not separating flow meter to this three-phase does not provide power supply, and gathers the signal of telecommunication that three-phase does not separate flow meter, calculates the flow of oil gas water three phase; And Industrial Personal Computer (IPC), be connected in described on-the-spot secondary meter by communication cable, show in real time the flow of oil-water-gas, and the data on flows of oil-water-gas is stored.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
The oil gas water flow measurement system of aforesaid tool self-con-tained unit, wherein said high-low pressure control device comprises: be successively set on the first high pressure alarm, the second high pressure alarm, low pressure alarm and quick action emergency valve on the metering header; The setting pressure of described the first high pressure alarm is less than the setting pressure of the second high pressure alarm.
The oil gas water flow measurement system of aforesaid tool self-con-tained unit, wherein said three-phase does not separate flow meter and comprises: trunk line; Venturi is arranged on trunk line, is used for measuring the flow of trunk line inner fluid; Conductivity measurement sensors is arranged in trunk line, is used for calculating gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of minute bubbles; Capacitance measuring sensor is arranged in trunk line, is used for calculating gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of large and small bubble; And the gamma densometer, be arranged in trunk line, be used for the density of Fluid Computation.
The oil gas water flow measurement system of aforesaid tool self-con-tained unit, wherein said conductivity measurement sensors comprise and setting gradually along the mixture flow direction: emission electrode, the backup electrode group that is made of two small electrodes, the working electrode group and the exploring electrode that are made of two small electrodes.
The oil gas water flow measurement system of aforesaid tool self-con-tained unit, the spacing of two small electrodes of wherein said working electrode group is 65mm; The spacing of two small electrodes of described backup electrode group is 65mm.
The oil gas water flow measurement system of aforesaid tool self-con-tained unit, wherein said capacitance measuring sensor comprise and setting gradually along the mixture flow direction: first electrode, the first small electrode, excitation variable winding, the second small electrode and second largest electrode; Wherein, first electrode and second largest electrode consist of the large electrode group, and the first small electrode and the second small electrode consist of the 3rd small electrode group.
The oil gas water flow measurement system of aforesaid tool self-con-tained unit, the spacing of two large electrodes of wherein said large electrode group is 165mm, two small electrode spacings of described the 3rd small electrode group are 65mm, and the 3rd small electrode group is arranged between two large electrodes of this large electrode group.
The oil gas water flow measurement system of aforesaid tool self-con-tained unit, wherein said gamma densometer is made of emitter and receiving system two parts; This emitter is made of radioactive source, plumbous box, mechanical shutter and corrosion resistant plate; This receiving system is made of receiving crystal, photomultiplier and electronics amplifier unit.
The oil gas water flow measurement system of aforesaid tool self-con-tained unit, wherein said receiving crystal are that sodium iodide adds thallium.
The oil gas water flow measurement system of aforesaid tool self-con-tained unit, wherein said on-the-spot secondary meter is comprised of flow computer, power module, safety barrier, densometer interface card and wiring terminal; Described flow computer is comprised of communication module and computing module.
By technique scheme, the oil gas water flow measurement system of tool self-con-tained unit of the present invention has following advantages at least:
The oil gas water flow measurement system of the tool self-con-tained unit that the present invention proposes, real time measure oil gas aquatic products amount online, energy accurate-metering individual well moisture content and variation tendency, be conducive to monitor the Oil/gas Well condition of production, for the diagnosis of ill production status provides data message accurately, avoid the generation of the abnormal conditions such as water breakthrough, has channeling and serious obstruction, meet the requirement of oil field meticulous process.
The oil gas water flow measurement system of this tool self-con-tained unit, it is Chinese onshore oil gas field successful Application three-phase flow meter metering first individual well oil gas aquatic products amount, widen approach for the onshore oil gas field especially one-well metering in high-pressure condensate gas field, indicated the developing direction of one-well metering.
The oil gas water flow measurement system of tool self-con-tained unit of the present invention due to the oil gas water gaging equipment that also has three phase separation, thereby can be verified mutually to the survey data of not separating flow meter, thereby guarantees the accuracy of survey data.
in sum, the oil gas water flow measurement system of the tool self-con-tained unit of special construction of the present invention, it has above-mentioned many advantages and practical value, and publish or use and really genus innovation there are no similar structure design in like product, no matter it structurally or larger improvement all arranged on function, have large improvement technically, and produced handy and practical effect, and more existing oil gas water flow measurement system has the heterogeneous effect of enhancement, thereby more be suitable for practicality, and has the extensive value of industry, it is really a novelty, progressive, practical new design.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of manual, below with preferred embodiment of the present invention and coordinate accompanying drawing to be described in detail as follows.
Description of drawings
Fig. 1 is the schematic flow sheet of the oil gas water flow measurement system embodiment of tool self-con-tained unit of the present invention.
Fig. 2 is the composition structural representation of on-the-spot secondary meter.
Fig. 3 is the structural representation that three-phase does not separate flow meter.
Fig. 4 is the structural representation of described capacitance measuring sensor.
Fig. 5 is the structural representation of conductivity measurement sensors.
Fig. 6 is the composition schematic diagram of high-low pressure control device.
The specific embodiment
Reach for further setting forth the present invention technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, its specific embodiment of oil gas water flow measurement system, structure, feature and the effect thereof of the tool self-con-tained unit that foundation the present invention is proposed are described in detail as follows.
Seeing also shown in Figure 1ly, is the schematic flow sheet of the oil gas water flow measurement system embodiment of tool self-con-tained unit of the present invention.The oil gas water flow measurement system of this tool self-con-tained unit, for the flow of measuring individual well oil gas water, it comprises: metering header P1013, for delivery of the mixture of oil, water and gas material; High-low pressure control device 500 is arranged on metering header P1013; Three-phase does not separate flow meter 100, metering separator 200 and on-the-spot secondary meter 300 and Industrial Personal Computer (IPC) 400.Metering header P1013 is for delivery of the mixture of oil, water and gas material, and high-low pressure control device 500 and metering separator 200 are arranged on metering header P1013; Described three-phase does not separate the flow that flow meter 100 is used for Real-time Measuring gauging gas-vapor mix material Oil, Water, Gas.Described on-the-spot secondary meter 300 is connected in above-mentioned three-phase and does not separate flow meter 100, and being used for not separating flow meter to this three-phase provides power supply, and gathers the signal of telecommunication that three-phase does not separate flow meter, calculates the flow of oil gas water three phase.Described Industrial Personal Computer (IPC) 400 is connected in described on-the-spot secondary meter by communication cable, shows in real time the flow of oil-water-gas, and the data on flows of oil-water-gas is stored.
See also shown in Figure 2ly, on-the-spot secondary meter 300 mainly is comprised of flow computer 301, power module 302, safety barrier 303, densometer interface card 304 and wiring terminal 305 etc.Described flow computer 301 is comprised of communication module and computing module.Communication module does not separate the capacitance sensor of flow meter 100 and the signal that conductivity sensor collects with three-phase, and the data importing flow computer of densometer interface card output, use the data wire teletransmission to Industrial Personal Computer (IPC) 400 result of calculation (oil gas water flow, temperature, pressure and differential pressure).Computing module is responsible for calculating oil gas water instantaneous delivery.Described power module is responsible for the 24V direct current of access is distributed, and is transmitter (pressure transmitter, differential pressure transmitter and temperature transmitter), capacitance sensor, conductivity sensor, gamma densometer and flow computer power supply.Described safety barrier is the associate device of inbeing safe explosion prevention instrument and meter, does not affect under normal circumstances the function of measuring system.It is arranged on a side of harbor, and when native system broke down, the energy (electric energy) that can will scurry into the hazardous area was limited in safety value, thereby guarantees produced on-site safety.Described densometer interface card is collected the signal that the gamma densometer gathers, and draws the instantaneous hybrid density of fluid by computing, with result of calculation input flow rate computer.The data remote of flow computer output is to the Central Control Room Industrial Personal Computer (IPC), Industrial Personal Computer (IPC) is used flow indication software after receiving data, realize the functions such as the instantaneous demonstration of oil gas water flow, oil well measurement and meter calibration, and these data are stored in order to later on these data are carried out statistics and analysis.
Seeing also shown in Figure 3ly, is the structural representation that three-phase does not separate flow meter.This three-phase does not separate flow meter 100 and comprises: supply the mobile trunk line 110 of mixture of oil, water and gas material, and be arranged on gamma density meter 120, capacitance measuring sensor 130, conductivity measurement sensors 140 and Venturi 150 on trunk line 110.The principle that this three-phase does not separate the measurement mixture of oil, water and gas of flow meter is that individual well comes the oil gas aqueous mixtures to be assumed to be four phase fluids, i.e. oil, water, discrete gas and free gas.Air pocket flow velocity identical with gas flow rate (air pocket is discrete gas), minute bubbles flow velocity identical with flow rate of liquid (minute bubbles are free gas) is vertically measured the interior oil phase flow velocity of pipeline section identical with aqueous phase flow rate.
If: Q: volume flow dose rate, A: volume phase fraction, v: flow velocity
Q＝A×V(1)
The volume phase fraction equals the product of phase fraction and measuring tube cross-sectional area, and because the measuring tube cross-sectional area is known, the calculating of each phase flow rate rate of oil gas water can be exchanged into phase fraction and each calculating of flow velocity mutually.
Described gamma densometer 120 is used for computational fluid mixing density, it is made of emitter and receiving system two parts, emitter mainly is made of parts such as radioactive source, plumbous box, mechanical shutter and corrosion resistant plates, and receiving system mainly contains receiving crystal (sodium iodide adds thallium), photomultiplier and electronics amplifier unit and consists of.The gamma-rays that radioactive source produces clashes into receiving crystal, can produce 1 electronics after each gamma-rays particle hits, electronics obtains energy through the high voltage electric field of photomultiplier, accelerated motion, finally caught by the electronics amplifier unit, and with the electron amount of electric impulse signal by receiving under counter records.During normal operation, gamma-rays enters in pipeline by shutter, and due to Fluid Flow in A being arranged in pipeline, oil gas water is understood the absorption portion gamma-rays, but the degree that absorbs is different, and receiving system can be measured and receive gamma-ray quantity in the unit interval this moment.Utilize empirical formula, calculate the hybrid density of fluid.
Seeing also shown in Figure 4ly, is the structural representation of described capacitance measuring sensor 130.This capacitance measuring sensor 130 comprises and setting gradually along the mixture flow direction: first electrode, the first small electrode, excitation variable winding 131, the second small electrode and second largest electrode; Wherein, first electrode and second largest electrode consist of large electrode group 132, the first small electrodes and the second small electrode formation the 3rd small electrode group 133.The spacing of two large electrodes of this large electrode group 132 is 165mm, two small electrode spacings of described the 3rd small electrode group 133 are 65mm, and the 3rd small electrode group 133 is arranged between two large electrodes of this large electrode group, and excitation variable winding 131 is between the first small electrode and the second small electrode.These excitation variable winding 131 excitation voltage signals, signal is successively by the 3rd small electrode group 133 and large electrode group 132, the 3rd small electrode group 133 records the signal of telecommunication that minute bubbles cause, and large electrode group 132 records the signal of telecommunication that air pocket causes, and voltage signal is measured and record in addition during through each electrode.According to the functional relation of voltage and dielectric constant, can draw out the time dependent curve of dielectric constant, this curve of integration can be calculated the average phase fraction of size bubble preset time.
Calculate each phase phase fraction of oil gas water
Capacitivity equation: ε
Mixture=f (α ε
Gas, β ε
Water, γ ε
Oil) (2-1)
Density equation: ρ
Mixture=f (α ρ
Gas, β ρ
Water, γ ρ
Oil) (3)
Normalizing equation: alpha+beta+γ=1 (4)
In formula:
ε
Mixture: mixture capacitivity (can be calculated by magnitude of voltage)
ε
Gas: gas phase capacitivity (known)
ε
Water: water capacitivity (known)
ε
Oil: oil phase capacitivity (known)
ρ
Mixture: mixture density (gamma densimeter measurement value can be calculated)
ρ
Gas: density of gas phase (known)
ρ
Water: water density (known)
ρ
Oil: oil phase density (known)
α: gas phase phase fraction (the unknown)
β: water phase fraction (the unknown)
γ: oil phase phase fraction (the unknown)
Three unknown numbers of three equations, simultaneous solution can obtain gas phase phase fraction, water phase fraction and oil phase phase fraction.
Calculation of Gas and flow rate of liquid
Seeing also shown in Figure 5ly, is the structural representation of conductivity measurement sensors.This conductivity measurement sensors 140 is arranged in trunk line 110, is used for calculating gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of minute bubbles.This conductivity measurement sensors 140 comprises and setting gradually along the mixture flow direction: emission electrode 141, the backup electrode group 142 that is made of two small electrodes, the working electrode group 143 and the exploring electrode 144 that are made of two small electrodes.The spacing of two small electrodes of described working electrode group 143 is 65mm; The spacing of two small electrodes of described backup electrode group 142 is 65mm.Emission electrode 141 emitting voltage signals, signal moves from bottom to up with fluid, passes through successively backup electrode group 142, working electrode group 143 and exploring electrode 144.Measured and the record in addition of voltage signal during through two electrode groups.According to the functional relation of voltage and dielectric constant, can draw out the time dependent curve of dielectric constant, this curve of integration can be calculated the average phase fraction of minute bubbles preset time.
Calculate each phase phase fraction of oil gas water
Conductivity equation: σ
Mixture=f (α σ
Gas, β σ
Water, γ σ
Oil) (2-2)
Density equation: ρ
Mixture=f (α ρ
Gas, β ρ
Water, γ ρ
Oil) (3)
Normalizing equation: alpha+beta+γ=1 (4)
In formula:
σ
Mixture: conductivity of mixture (can be calculated by magnitude of voltage)
σ
Gas: gas phase electrical conductivity (known)
σ
Water: water electrical conductivity (known)
σ
Oil: oil phase electrical conductivity (known)
ρ
Mixture: mixture density (gamma densimeter measurement value can be calculated)
ρ
Gas: density of gas phase (known)
ρ
Water: water density (known)
ρ
Oil: oil phase density (known)
α: gas phase phase fraction (the unknown)
β: water phase fraction (the unknown)
γ: oil phase phase fraction (the unknown)
Three unknown numbers of three equations, simultaneous solution can obtain gas phase phase fraction, water phase fraction and oil phase phase fraction.
Calculation of Gas and flow rate of liquid
Emission electrode emitting voltage signal, the measured and record in addition of voltage signal when the small electrode.After a period of time, two time dependent curves of some voltages of each self-forming of small electrode of working electrode group are done computing cross-correlation to these curves, if when drawing maximum, what can think two small electrodes measurements is same fluid.Time T corresponding to this point of maximum occur and think that namely same logistics moves to rear required time of an electrode, V at this moment from last electrode
Gas(V
Liquid)=d/T=0.065/T.(d is the distance between small electrode, known d=0.065m).
The conversion of capacitance measuring sensor and conductance measurement sensor
Conductivity measurement sensors has an exploring electrode, the signal of telecommunication that the continual measurement of this electrode receives, and it is converted into electrical conductivity, (electrical conductivity of vacant duct is 1 when electrical conductivity reaches 30 left and right, oil-overflow pipeline electrical conductivity is 2～2.3, and water-filled pipeline electrical conductivity is saturation value 〉=35), (moisture is 65%～75%), capacitance measuring sensor quits work, and conductivity measurement sensors is started working.
Described Venturi 150 is used for measuring liquid phase flow rate.This Venturi becomes the fluid pressure difference of certain relation to measure fluid flow by measuring with flow, utilize the pressure that produces before and after the fluid throttling to change to measure.
In formula:
M: liquid quality flow
E: penalty coefficient (
)
C: discharge coefficient (c=f (Re
D, β)
Re
D: Reynolds number
β: Venturi tube trunnion internal diameter/Venturi tube internal diameter
γ: level pressure thermal capacitance/constant volume thermal capacitance
ε: sampling factor (ε=f (dP/P, beta, gamma)
ρ: fluid density
A: Wen's trunnion passes through area
DP: fluid is by differential pressure before and after Venturi tube
When capacitance measuring sensor or conductivity measurement sensors cross-correlation calculation flow velocity, when the cross-correlation success rate is on the low side (being that the cross-correlation calculation success rate is lower than minimum permissible value), the liquid phase flow rate that the venturi of winning the confidence calculates.
See also shown in Figure 1ly, after three-phase does not separate flow meter 100, be connected in metering separator 200 by pipeline.This metering separator comprises with tank body, thereby be provided with baffle plate 212 and baffle plate 223 in the inside of tank body, tank interior is divided into three chambeies: oil mixing with water chamber 210, oil pocket 220 and water cavity 230.The principle that these metering separator 200 application of weight are separated is opened oil and gas and water.Mixture of oil, water and gas enters eliminator by the gas-liquid Gravity Separation, and gas phase, is discharged by gaseous phase outlet, and at gaseous phase outlet, gas flowmeter FT2201 is installed except after liquid through corrugated sheet and mist eliminator.Liquid phase water-oil separating under Action of Gravity Field, oil spill flow to into oil pocket 220, and water enters water cavity 230 by water communicating pipe 240.Be provided with the oil phase outlet in oil pocket 220 bottoms, and be provided with oil flowmeter FT2202 in this outlet, be used for measuring oily flow.Be provided with the water outlet in the bottom of water cavity, and be provided with water ga(u)ge FT2203 in this outlet, be used for measuring the flow of water.
Oil mixing with water chamber and water cavity are communicated with, and according to U-shaped law of connected vessels, design formulas is as follows:
ρ
0h
0＝ρ
0h
1+ρ
1(h
2-h
1)
Wherein: ρ
0: sewage density h
0: water cavity water layer height
ρ
1: oil density
h
1: oil mixing with water chamber water layer height
h
2-h
1: oil mixing with water chamber oil reservoir height
Suppose h
2-h
1=0, due to h
2=1.5m ρ
0=1120kg/m
3ρ
1=720kg/m
3Solving equation 1 can get h
0=1.5m
h
2-h
1=0, be namely all water in the oil mixing with water chamber, the height of water cavity water layer liquid level is 1.5m.But the highest operation liquid level of water is 1.22m, less than 1.5m.Therefore, during the eliminator normal operating, the oil reservoir liquid level in oil mixing with water chamber can not be 0, and namely the water in the oil mixing with water chamber can not overflow to oil pocket.
The water cavity height of baffle plate is 1.8m, and the highest operation liquid level of oil pocket is 1.02m.Therefore, during the eliminator normal operating, the oil in oil pocket can not overflow across the water cavity baffle plate and enter water cavity.
Water cavity
ρ
0h
0＝ρ
0h
1+ρ
1(h
2-h
1)
Suppose h
1=0, due to h
2=1.5m ρ
0=1120kg/m
3ρ
1=720kg/m
3Solving equation 1 can get h
0=0.965m
h
1=0, be all namely oil in the oil mixing with water chamber, the height of water cavity water layer liquid level should be 0.965m.Because water minimum operation liquid level is 0.98m, greater than 0.965m.Therefore, during the eliminator normal operating, the water layer liquid level in oil mixing with water chamber can not be 0, and namely the oil in the oil mixing with water chamber can not flow to water cavity from water communicating pipe.
The water cavity height of baffle plate is 1.8m, and the highest operation liquid level of water cavity is 1.22m.Therefore, during the eliminator normal operating, the water in water cavity can not overflow across the water cavity baffle plate and enter oil pocket.
Seeing also shown in Figure 6ly, is the composition schematic diagram of high-low pressure control device of the present invention.This high-low pressure control device 500 comprises: be successively set on the first high pressure alarm PSH2202 (setting pressure 14MPa), the second high pressure alarm PSH2203 (setting pressure 15.8MPa), low pressure alarm PSLL2204 (setting pressure 5MPa), header safety valve V2201, header safety valve V2202, anxious atmospheric valve BDV2202 and quick action emergency valve SDV2201 (setting pressure 7.7MPa) on metering header P1013.
When breaking out of fire or blast will cause that full station is turn-offed, emergency cut-off quick action emergency valve SDV2201, meanwhile, by the long-range urgent closing well of well head RTU.If indivedual condensate gas production wells head emergent cut-off valves are not closed completely or when malfunctioning, there is the well stream logistics to go out well head and enter the condensate gas acquisition system with continuing, the pressure of this metering header P1013 will continue to rise, when pressure is increased to 14MPa, the first high pressure alarm is reported to the police, automatically open emergency blow-down valve BDV2202, with the system pressure accident blow-down tank of releasing.If emergency blow-down valve BDV2202 breaks down do not open, header pressure is increased to 15.8MPa the second high pressure alarm and reports to the police, header safety valve V2201 and header safety valve V2202 take-off emptying.Have hydrate to form in metering header P1013, three-phase flow meter 100 frozen blocks build the pressure.Metering header normal pressure is 6.8MPa, when pressure is increased to 7.2MPa, and the high newspaper of Central Control Room pressure; To continue to raise as the pressure of not taking measures, when being increased to 7.7MPa, emergency shutdown valve SDV2201 closes, and should open immediately three-phase flow meter bypass valve this moment, still raises as pressure, whether the valve of considering other easy frozen block frozen block (as control valve etc.) occurs, as not finding the frozen block position, pressure will continue to raise, when pressure rise to 14MPa, system opens emergency blow-down valve BDV2202 automatically, with the system pressure accident blow-down tank 01V-2501 that releases.The present invention has been owing to having had the high-low pressure control device, thereby makes this measuring system more be convenient to safeguard and use.
The technology contents that the application does not describe in detail all can find corresponding scheme in the prior art, therefore do not repeat them here.
the above, it is only preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet be not to limit the present invention, any those skilled in the art, within not breaking away from the technical solution of the present invention scope, when the technology contents that can utilize above-mentioned announcement is made a little change or is modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, any simple modification that foundation technical spirit of the present invention is done above embodiment, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. the oil gas water flow measurement system of a tool self-con-tained unit is used for measuring the flow of individual well oil gas water, it is characterized in that it comprises:
The metering header is for delivery of the mixture of oil, water and gas material;
The high-low pressure control device is arranged on the metering header;
The first high pressure in described high-low pressure control device is 14MPa, and the second high pressure in described high-low pressure control device is 15.8MPa, and the low pressure in described high-low pressure control device is 5MPa;
Three-phase does not separate flow meter, is arranged on the metering header and after being positioned at above-mentioned high-low pressure control device, is used for real time measure oil gas water instantaneous delivery;
On-the-spot secondary meter does not separate flow meter with above-mentioned three-phase and is connected, and being used for not separating flow meter to this three-phase does not provide power supply, and gathers the signal of telecommunication that three-phase does not separate flow meter, calculates the flow of oil gas water three phase; And
Industrial Personal Computer (IPC) is connected in described on-the-spot secondary meter by communication cable, shows in real time the flow of oil-water-gas, and the data on flows of oil-water-gas is stored.
2. the oil gas water flow measurement system of tool self-con-tained unit according to claim 1, is characterized in that wherein said high-low pressure control device comprises: be successively set on the first high pressure alarm, the second high pressure alarm, low pressure alarm and quick action emergency valve on the metering header; The setting pressure of described the first high pressure alarm is less than the setting pressure of the second high pressure alarm;
The force value that described the first high pressure alarm is set is 14MPa;
The force value that described the second high pressure alarm is set is 15.8MPa.
3. the oil gas water flow measurement system of tool self-con-tained unit according to claim 1 is characterized in that wherein said three-phase does not separate flow meter and comprises:
Trunk line;
Venturi is arranged on trunk line, is used for measuring the flow of trunk line inner fluid;
Conductivity measurement sensors is arranged in trunk line, is used for calculating gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of minute bubbles;
Capacitance measuring sensor is arranged in trunk line, is used for calculating gas phase fraction, each phase phase fraction of oil gas water, gas and the flow rate of liquid of large and small bubble; And
The gamma densometer is arranged in trunk line, is used for the density of Fluid Computation;
Wherein, air pocket is discrete gas, and minute bubbles are free gas.
4. the oil gas water flow measurement system of tool self-con-tained unit according to claim 3 is characterized in that wherein said conductivity measurement sensors comprises to set gradually along the mixture flow direction: emission electrode, the backup electrode group that is made of two small electrodes, the working electrode group and the exploring electrode that are made of two small electrodes.
5. the oil gas water flow measurement system of tool self-con-tained unit according to claim 4, the spacing that it is characterized in that two small electrodes of wherein said working electrode group is 65mm; The spacing of two small electrodes of described backup electrode group is 65mm.
6. the oil gas water flow measurement system of tool self-con-tained unit according to claim 3 is characterized in that wherein said capacitance measuring sensor comprises to set gradually along the mixture flow direction: first electrode, the first small electrode, excitation variable winding, the second small electrode and second largest electrode; Wherein, first electrode and second largest electrode consist of the large electrode group, and the first small electrode and the second small electrode consist of the 3rd small electrode group.
7. the oil gas water flow measurement system of tool self-con-tained unit according to claim 6, the spacing that it is characterized in that two large electrodes of wherein said large electrode group is 165mm, two small electrode spacings of described the 3rd small electrode group are 65mm, and the 3rd small electrode group is arranged between two large electrodes of this large electrode group.
8. the oil gas water flow measurement system of tool self-con-tained unit according to claim 3, is characterized in that wherein said gamma densometer is made of emitter and receiving system two parts; This emitter is made of radioactive source, plumbous box, mechanical shutter and corrosion resistant plate; This receiving system is made of receiving crystal, photomultiplier and electronics amplifier unit.
9. the oil gas water flow measurement system of tool self-con-tained unit according to claim 8, is characterized in that wherein said receiving crystal is that sodium iodide adds thallium.
10. the oil gas water flow measurement system of according to claim 1-9 described tool self-con-tained units of any one, is characterized in that wherein said on-the-spot secondary meter is comprised of flow computer, power module, safety barrier, densometer interface card and wiring terminal; Described flow computer is comprised of communication module and computing module.
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| CN2008101125634A CN101333926B (en) | 2008-05-23 | 2008-05-23 | Oil gas water flow measurement system possessing automatic control device |
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| CN101333926A CN101333926A (en) | 2008-12-31 |
| CN101333926B true CN101333926B (en) | 2013-05-15 |
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| CN103149339B (en) * | 2013-01-29 | 2015-06-24 | 中国科学院力学研究所 | Single fracture unsaturated seepage test system |
| CN112878995A (en) * | 2021-03-10 | 2021-06-01 | 中国石油天然气集团有限公司 | Underground overflow detection system based on near-bit fluid dielectric characteristic measurement |
| CN113041652B (en) * | 2021-03-17 | 2022-03-15 | 中国海洋石油集团有限公司 | Oil-gas separator and pressure setting method thereof |
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