CN201335814Y - High double-energy X-ray measuring device for measuring multiphase flow index of oil-gas field - Google Patents

Abstract

The utility model relates to a high double-energy X-ray measuring device for measuring the index of the water content, oil content, air content or sand content of crude oil or natural gas, which is arranged on the crude oil or natural gas pipeline. The device is characterized in that the measuring device comprises three subsystems which are a double-energy X-ray generating subsystem which mainly comprises an X-ray machine, a detector subsystem formed by one set or two sets of detectors, and a main control and data processing subsystem which is also called a control system. The measuring device also comprises a collimating device which is internally provided with a shielded-plate tube. The detector subsystem comprises a detector, a preamplifier or a photomuitplier, a signal forming, amplification, sampling and maintaining unit and an AD converting unit, and is connected with the main control and data processing subsystem; the main control and data processing subsystem comprises a data transmission, synchronization and control unit and a warning unit; and the detector is connected with the collimating device which is connected with the control system.

Description

The true dual intensity χ radionetric survey device of polyphasic flow index in the oil gas field

Technical field

The utility model relates to the oil field of measuring technique, be specifically related to crude oil, water percentage in the gas production, oil content, the measuring system of void fraction or silt content, be that the dual intensity χ ray that utilizes dual intensity χ ray machine to produce produces the different principle of effect with the material effect, in oil gas field is produced, profit gas, measure oil transportation under the husky water three-phase medium of oil husky water or gas and the condition of depositing, water percentage in the feed channel, oil content, the dual intensity χ radionetric survey equipment of void fraction or silt content index (can only survey three relevant with corresponding fluid-mixing in four indexs indexs) belongs to International Classification of Patents G01N technical field.

Background technology

Crude oil and rock gas be as one of most important energy, crude oil, the rock gas exploited out from oil, gas well, the potpourri of being made up of multiphase mediums such as oil, water, rock gas or the grains of sand.Handle this potpourri and at first will carry out gas-liquid separation, remaining oil-water mixture body obtains the very low product oil of water percentage or rock gas after processed defeated or sell outside carrying out.To the grains of sand with which, also to monitor, in time separate, otherwise easy damage equipment.In a series of activities in production such as crude oil or gas dehydration processing, need grasp situations such as crude oil water content, void fraction or oil content timely and accurately, so that the control production run guarantees to produce qualified finished product crude oil or rock gas.Therefore, indexs such as water percentage, void fraction, oil content or silt content are one group of important parameters in the collection of petrochemical industry oil and natural gas, smelting and the transportation in crude oil or the rock gas.Particularly many maturing fields, the main at present water flood recovery technology that adopts, the water percentage of extraction crude oil is generally higher.Therefore, the accurate detection of carrying out water percentage, void fraction, oil content or silt content in crude oil or the rock gas there is vital role in crude oil or gas production, trade.

In crude production, measure crude oil water content at present and mainly contain following several method: manually distill assay method, microwave method (or radio frequency method), capacitance method, shortwave method, heat conduction method, vibration densimeter method and gamma-rays method.1, microwave method (as CN1112677) is to interact according to electromagnetic wave and dielectric material, its dissipation is relevant with the size and the relative dielectric constant of material, the different radio-frequency (RF) impedance characteristic differences that cause measurand to present of oil with the specific inductive capacity of water, when radiofrequency signal passes to the oil water mixture when being the condenser type radio frequency sensor of medium, its loaded impedance changes along with the different ow ratios of blending agent, promptly when crude oil water content changed, wave parameter changed thereupon, thereby realized measurement of water ratio; 2, capacitance method (as: CN1186236) is the specific inductive capacity difference according to profit, is reflected to the electric capacity difference of the capacitor that is made of pole plate, measures the variation of electric capacity, the variation that just can measure water percentage; 3, shortwave method (as: CN2349574) is to utilize the short-wave signal of one (back) probe emission 3.579MHz in crude oil, current crude state is investigated thoroughly, at interval after several seconds, at short-wave signal by another (preceding) probe emission 3.579MHz in crude oil, take out the signal of Water in oil again, get the difference that secondary records then, can draw instantaneous water percentage after treatment; 4, heat conduction method (as: CN1259671) is utilized the difference of the thermophysical property of liquid-gas-liquid two-phase liquid, as heat conduction, specific heat, viscosity etc., measures the water percentage and the profit flow of crude oil simultaneously; 5, vibration densimeter method (as: CN1789969, CN2359692) utilize the level gauging element to measure the liquid level of the interior crude oil of storage tank (or separation vessel), pressure measuring instruments is measured the pressure of no crude oil part in the storage tank (or separation vessel) and the pressure that bear the bottom, calculates by experimental formula at last; 6, (as: CN1086602A is when passing different medium according to gamma-rays CN2383068Y) to rays method for CN86105543A, CN2359692Y, the principle work that its decay is different.The various measuring methods of except that the gamma-rays method other, all belong to contact type measurement, because crude oil corrosivity is stronger, fouling, wax deposition are serious, cause the poor reliability of instrument long-time running, especially these instrument all can't be eliminated the influence that gassiness brings measurement of water ratio, and have caused bigger measuring error.To this, patent CN2452022Y, CN2646704Y with the CN2646705Y specialized designs different erasers remove the impurity of sensor outside accumulation.In addition, the water percentage that capacitance method, radio frequency method and microwave method are measured change and measured between be nonlinear relationship, in a certain water percentage scope, flex point is arranged, and crude oil is profit gas mixture, its physicochemical property are changeable, so the top several measuring methods except that the gamma-rays method in actual applications, all can not satisfy production requirement well.

The water in oil analyzer of working according to gamma-rays and matter interaction rule and the macroscopical fluidised form and the chemical property of fluid-mixing are irrelevant, can carry out the measurement of water percentage and void fraction to the crude oil of complexity, are subjected to field operations personnel's welcome deeply.

Patent of invention CN86105543A disclose a kind of utilize radioactive source (as ¹⁰⁹Cd, or ²⁴³Am etc.) monoenergetic gamma rays that sends is to the measuring principle of the volumetric water content of two-phase profit mixture.Utility model patent CN2359692Y has announced a kind of utilization ²³⁸The device that the Pu radioactive source is measured the water percentage of two-phase profit mixture.Patent of invention CN1086602A discloses a kind of in three-phase profit gas mixture, measures the automatic measuring instrument of gassiness, water percentage in the crude oil; Be fixed with gamma ray projector and transmission detectors respectively in radial center line symmetry both sides, the sidewall upper edge of measuring channel; Becoming angle with transmission detectors place center line and axially on the center line sidewall of certain distance, be fixed with scattering detector with it with gamma ray projector along measuring channel; According to the result who measures, obtain gas volume fraction and volumetric water content at last through data processing.Document [1] has been done further discussion theoretically to its measuring principle.Utility model patent CN2383068Y is to the device according to above-mentioned principle design, improve, increased a stirring apparatus, the profit gas that comes out in the oil well is mixed, so that further satisfy the theory hypothesis condition, so that improve the precision of measuring.In any case, this theoretical model is got approximate place too much, and each parameter physical significance is indeterminate, to the influence of running parameters such as pressure, temperature, considers to revise, and these have finally still influenced the method and the measuring accuracy of its use.

In addition, the gamma-ray measurement method of using radioactive source to produce also has a bigger weakness, has the radiological safety problem exactly, and particularly in anti-terrorism situation at present relatively severeer period, this weakness is more outstanding.

To sediment concentration measuring, GB2429288A has announced a patent that adopts acoustic method to measure silt content.So i.e. collision by sand and oil transportation or gas pipe line wall comes what of silt content in the fluid operator.Utilize the equipment of this patent design, have simple in structurely, easy for installation, power consumption is little, locally preserves that data time is long to be waited a bit.But the working frequency range of this principle belongs to audio frequency, and its interference source is many, and more complicated, its measurement result also are subjected to the influence of fluid mobility matter easily, so Measurement Uncertainty is bigger, can not satisfy the needs of high-acruracy survey.

Do not find to use the method and apparatus that dual intensity χ rays method is measured water percentage, oil content, void fraction or silt content in crude oil and the gas production in the market as yet.

Summary of the invention

The purpose of this utility model, be in profit gas or profit sand or the husky three-phase mixture of aqueous vapor, real-time high-precision is measured the demand of water percentage, oil content, void fraction or silt content in crude oil or the rock gas, and a kind of device that adopts dual intensity commercial measurement water percentage, oil content, void fraction or silt content is provided.(can only survey three relevant in four indexs) with corresponding fluid-mixing

The purpose of this utility model is achieved through the following technical solutions.

For simplicity, the following describes the situation of only considering Oil, Water, Gas three-phase mixture coexistence in the crude oil, situation to Oil, Water, Gas three-phase mixture coexistence in the rock gas, and the situation of the husky three-phase coexistence of profit sand or aqueous vapor in crude oil and the rock gas, measurement mechanism is identical, the skill of data processing is similar, only needs to replace related physical quantity and get final product in the formula that provides, so the related description of other situation is omitted.

The true dual intensity χ radionetric survey device of void fraction and water percentage in the crude oil, be installed on the crude oil pipeline, it is made up of three subsystems, that is: dual intensity χ ray produces subsystem, mainly comprise X-ray machine, the detector subsystem that one cover or two cover detectors constitute, and a master control and a data processing subsystem or claim control system; Other device also comprises collimating apparatus, and shielded-plate tube is arranged in the collimating apparatus; Described detector subsystem comprises detector, prime amplifier or photomultiplier, signal shaping, amplification, sampling, maintenance and AD converting unit, and the detector subsystem connects master control and data processing subsystem; Master control and data processing subsystem comprise data transmission, synchronously, demonstration, control and warning part; Detector is connected with collimating apparatus, and collimating apparatus is connected with control system.

Described measurement mechanism is installed on the crude oil pipeline, be at an end of crude oil pipeline horizontal diameter the χ ray that includes X-ray machine control system and collimating apparatus, screened room to be installed to produce subsystem, be provided with sigmatron target spot and low energy X ray target spot that the position overlaps substantially in the screened room of collimating apparatus; The other end of crude oil pipeline horizontal diameter is equipped with the detector subsystem.

Described measurement mechanism is corresponding to four kinds of polyphasic flow blend modes of operation: profit gas in the husky polyphasic flow mixed mode of profit gas in the crude production or profit, the gas production or the husky polyphasic flow mixed mode of profit; The measurement mechanism of these four kinds of blend modes of operation is identical, and data processing method is similar, can measure three indexs corresponding with the polyphasic flow mixed mode.

The utility model is specially adapted to the automatic on-line metering system in the field produces, has overcome the major safety risks that radioactive source brings.When utilizing X-ray machine as radiographic source, can exempt the puzzlement of losing radioactive source, improve radiation proof safety coefficient, fundamentally stop the chance that the terrorist obtains the dirty bomb raw material, national security there is the meaning of particular importance.

Description of drawings

Accompanying drawing is structure of the present utility model and the synoptic diagram that is installed on crude oil pipeline.

Among the figure: among the figure: the 1-measurement mechanism; The target spot of 2-high energy χ ray machine; The collimating apparatus and the screened room of 3-high energy χ ray machine; 4-(first group) detector; The shielded-plate tube of 5-(first group) detector; The target spot of 6-low energy χ ray machine; The collimating apparatus and the screened room of 7-low energy χ ray machine; The 10-crude oil pipeline; 20-(first via) signal shaping, amplification and sample holding unit; The high-voltage power supply of 22-(first group) detector; 24-(first via) AD converting unit; 26-(first via) control module; The 28-computing machine; The control system of the true dual intensity χ of 30-ray machine; 33-(first via) gamma correction detector; 34-Third Road signal shaping, amplification and sample holding unit; The high-voltage power supply of 35-Third Road detector; 36-Third Road AD converting unit; 37-Third Road control module.

Embodiment

Referring to accompanying drawing, measurement mechanism 1 of the present utility model mainly is made up of three big subsystems.The χ ray machine of two kinds of energy constitutes the χ ray and produces subsystem; One or two cover detectors formation detector subsystems; Form with total control and data processing subsystem.Other subsystem part also comprises collimating apparatus, or other mechanism etc.The detector subsystem comprises unit such as detector, prime amplifier or photomultiplier, signal shaping, amplification, sampling maintenance, AD conversion.The transmission of data, synchronously, work such as demonstration, each several part control and warning are finished by total control and data processing subsystem unification.

The feature of true dual intensity χ ray machine is that the position of the target spot 6 of the target spot 2 of high energy χ ray and low energy χ ray overlaps substantially, the alternately output of timesharing of the high and low energy of the control system 30 controls χ ray of true dual intensity χ ray machine, the frequency of output pulse is relevant with the speed of fluid.Wish high and low can beating simultaneously on the same position of medium by the χ ray in theory, can be in the practice according to uniformity coefficient, the flow velocity of medium, require the interval of Monitoring Data etc., regulate its parameter, to guarantee test condition As soon as possible Promising Policy theoretical model and error requirements.

The χ ray that is sent by target spot 2 and 6 after collimating apparatus 3 and 7 (the two is integrated, for consistent with numbering in other file, specially keeps two labels), passes the medium in the crude oil pipeline 10, is detected device 4 and converts electric signal to.The effect of the shielded-plate tube 5 of detector is that protection detector 4 and reducing is surveyed the influence to detector 4 of background, scattered signal.

The high-voltage power supply 22 of detector provides operating voltage for detector 4, the signal of detector 4 outputs to signal shaping, amplification and sample holding unit 20, signal is delivered to AD converting unit 24 and is converted digital signal to through after amplifying, handling, and delivers to computing machine 28 at last and carries out analyzing and processing.Control module 26 is used for synchronously, coordinates the work of each unit or subsystem.

Omitted the second cover detector system in this example, high and low can signal identification, be to realize alternately synchronously by the control system 30 of true dual intensity χ ray machine and the signal of control module 26.

If the line of χ ray machine is bigger over time, promptly the line instability then when the actual treatment data, should be revised it.For the line that obtains the χ ray machine is measured over time, need to increase the detection system that is used for gamma correction.That is: in the outlet of χ ray machine one road gamma correction detector 33 is installed, the high-voltage power supply 35 of Third Road detector provides high pressure for detector 33, the signal of detector 33 outputs to Third Road signal shaping, amplification and sample holding unit 34, signal is through after amplifying, handling, deliver to Third Road AD converting unit 36 and convert digital signal to, deliver to computing machine 28 at last and carry out analyzing and processing.Control module 37 is used for synchronously, coordinates the work of each unit or subsystem.

If the line of χ ray machine is stable, to the error that systematic survey brings, can ignore, then the detection system of relevant gamma correction can be omitted.

Described measuring equipment and corresponding software are supporting, special software on the computing machine 28, earlier the data that detect are divided into high energy group DS and low energy group DS, use the high and low energy data that brightness detector obtains, respectively its corresponding all data are constantly revised, at first eliminated the line influence over time of χ ray machine.Then, use the model (also can adopt other proper model) of deriving in the utility model, calculate indexs such as water percentage in the crude oil, void fraction.Adopted particular algorithm to find the solution water percentage ω in this software ₁With void fraction ω ₃ω ₁The shared percentage by weight of expression water is a water percentage, ω ₃The shared percentage by weight of expression rock gas is a void fraction, ω ₂The percentage by weight ω that expression oil is shared ₂=1-ω ₁-ω ₃In order to revise the stability of χ ray machine institute topknot stream, added a cover gamma correction detector subsystem that the gamma correction detector constitutes.

Under profit gas three-phase state, this software has adopted two following equations to find the solution water percentage ω ₁With void fraction ω ₃,

$({\mathrm{\ω}}_1(\frac{{\mathrm{\μ}}_1\left(E_H^{*}\right)}{{\mathrm{\ρ}}_1}-\frac{{\mathrm{\μ}}_2\left(E_H^{*}\right)}{{\mathrm{\ρ}}_2})+{\mathrm{\ω}}_3(\frac{{\mathrm{\μ}}_3\left(E_H^{*}\right)}{{\mathrm{\ρ}}_3}-\frac{{\mathrm{\μ}}_2\left(E_H^{*}\right)}{{\mathrm{\ρ}}_2})+\frac{{\mathrm{\μ}}_2\left(E_H^{*}\right)}{{\mathrm{\ρ}}_2})\·\left(\mathrm{x\ρ}\right)$

$=\ln \left(\frac{k_H{N}_0\left(E_H^{*}\right)}{N(x,E_H^{*})-k_H{c}_H{N}_0\left(E_H^{*}\right)}\right)---\left(13\right)$

$({\mathrm{\ω}}_1(\frac{{\mathrm{\μ}}_1\left(E_L^{*}\right)}{{\mathrm{\ρ}}_1}-\frac{{\mathrm{\μ}}_2\left(E_L^{*}\right)}{{\mathrm{\ρ}}_2})+{\mathrm{\ω}}_3(\frac{{\mathrm{\μ}}_3\left(E_L^{*}\right)}{{\mathrm{\ρ}}_3}-\frac{{\mathrm{\μ}}_2\left(E_L^{*}\right)}{{\mathrm{\ρ}}_2})+\frac{{\mathrm{\μ}}_2\left(E_L^{*}\right)}{{\mathrm{\ρ}}_2})\·\left(\mathrm{x\ρ}\right)$

$=\ln \left(\frac{k_L{N}_0\left(E_L^{*}\right)}{N(x,E_L^{*})-k_L{c}_L{N}_0\left(E_L^{*}\right)}\right)---\left(14\right)$

In the above-mentioned equation: because the power spectrum that the χ ray machine is sent out is continuous, so E _H ^*, E _L ^*Represent the high energy and the pairing equivalent energy of low energy χ ray of χ ray machine respectively; ρ represents the actual density under the profit gas three-phase state in the oil pipe, ρ ₁Represent in the actual oil pipe density of pure water under the conditions such as pairing temperature, pressure, ρ ₂Represent in the actual oil pipe density of pure crude oil under the conditions such as pairing temperature, pressure, ρ ₃Represent in the actual oil pipe density of pure natural gas under the conditions such as pairing temperature, pressure; μ ₁, μ ₂, μ ₃Represent pure water, pure crude oil, the linear attenuation coefficient of pure natural gas under the equivalent ray energy of correspondence respectively; X represents in the oil pipe, the linear thickness of test macro measurement space; N ₀(E ^*) representative under the equivalent ray energy condition of correspondence, when existing without any material in the oil pipe, the counting that test macro is measured; N (x, E ^*) represent under the measurement thickness of correspondence, equivalent ray energy condition the counting that test macro is measured; K, c are respectively correction factor, same μ ₁, μ ₂, μ ₃Together, can try to achieve by measuring exponential decay curve in advance.

When only considering profit two-phase state, can be reduced to monoenergetic to the χ ray machine energy of measuring system, adopted following formula to find the solution water percentage ω in the at this moment described software ₁,

${\mathrm{\ω}}_1=\frac{\ln \left(\frac{{\mathrm{kN}}_0}{N\left(x\right)-\mathrm{kc}{N}_0}\right)-\left(\frac{{\mathrm{\μ}}_2}{{\mathrm{\ρ}}_2}\right)\mathrm{x\ρ}}{(\frac{{\mathrm{\μ}}_1}{{\mathrm{\ρ}}_1}-\frac{{\mathrm{\μ}}_2}{{\mathrm{\ρ}}_2})\mathrm{x\ρ}}---\left(9\right)$

In the formula: ρ represents the actual density under the profit two-phase state in the oil pipe, ρ ₁Represent in the actual oil pipe density of pure water under the conditions such as pairing temperature, pressure, ρ ₂Represent in the actual oil pipe density of pure crude oil under the conditions such as pairing temperature, pressure; μ ₁, μ ₂Represent pure water, the linear attenuation coefficient of pure crude oil under the equivalent ray energy of correspondence respectively; X represents in the oil pipe, the linear thickness of test macro measurement space; N ₀Representative under the equivalent ray energy condition of correspondence, when existing without any material in the oil pipe, the counting that test macro is measured; N (x) represents under the measurement thickness of correspondence, equivalent ray energy condition, the counting that test macro is measured; K, c are respectively correction factor, same μ ₁, μ ₂Together, can try to achieve by measuring exponential decay curve in advance; The theoretical value of k and c is: k=1; C=0.When lacking experiment value, can directly quote theoretical value.

During design χ optical-mechanical system, the certain condition that satisfies between the high and low energy is taken into account high energy E _H ^*With low energy E _L ^*Difference big more, measuring accuracy is high more; For example: $E_H^{*}\≈(1.5~3)E_L^{*},$ It is simple a bit desirable, $E_H^{*}=2E_L^{*};$ The energy range of described high energy χ ray machine can be taken between 10keV～1MeV.

This measuring method relies on true dual intensity χ ray machine measuring system, the mounting means of its measuring equipment core component, be to produce subsystem at the horizontal diameter one end installing χ of crude oil pipeline xsect ray, comprise true dual intensity χ ray machine control system, connect collimating apparatus, be provided with the target spot of the high energy χ ray that the position overlaps substantially and the target spot of low energy χ ray in the collimating apparatus screened room; The other end installing detector subsystem of crude oil pipeline xsect horizontal diameter, comprise detector and shielded-plate tube, connect master control and data processing subsystem, comprise high-voltage power supply, first via AD converting unit, first via control module and the data handling machine of interconnective first via signal shaping, amplification and sample holding unit, first group of detector.

If the line less stable of χ ray machine in order to improve measuring accuracy, can add one road gamma correction detector.It is characterized in that: one road gamma correction detector is installed in the outlet of each χ ray machine; Or the gamma correction position of detector flows but had better not block the main beam that is used to measure in the outlet of χ ray machine.With the gamma correction detector is that example illustrates its installation relation: the target spot of χ ray machine, collimating apparatus and gamma correction detector are formed a cover χ ray line size detection path, connect high-voltage power supply, Third Road AD converting unit, Third Road control module and the computing machine of Third Road signal shaping, amplification and sample holding unit, Third Road detector.If χ ray machine performance is relatively good, when institute's topknot stream is stablized, can omit.Also can adopt other methods such as monitoring χ ray machine tube current to come the line size is done real time calibration.

The utility model dual intensity χ radionetric survey technology, χ ray and the material action principle of promptly utilizing the χ ray machine to produce, in field produces, under the profit gas three-phase medium and the condition of depositing, water percentage and void fraction index in the measurement oil pipeline.This system has overcome the major safety risks that radioactive source brings, and is specially adapted in the field produces automatic on-line metering system.The ratio of precision of the utility model theoretical model is higher, and the physical significance of various parameters is clearer and more definite, uses simply, can also consider the influence of factors such as temperature, pressure, is specially adapted in the field produces automatic on-line metering system.When utilizing X-ray machine as radiographic source, can exempt the puzzlement of losing radioactive source, improved radiation proof safety coefficient, fundamentally stopped the chance that the terrorist obtains the dirty bomb raw material, national security there is the meaning of particular importance.

Some problems in utilizing for formula:

1) at experiment measuring ρ ₁, ρ ₂, ρ ₃During with ρ, need the temperature of while test sample, the influence of pressure and other parameters.

2) because the state of gas and temperature, pressure are closely related, in the application, measure and the corresponding to ρ of physical condition ₃And μ _M3

3) during solving equation, utilize look-up table, adopt and the corresponding ρ value of physical condition, can be by measuring in real time.

4) high energy E _H ^*With low energy E _L ^*Difference big more, measuring accuracy is good more.For example: $E_H^{*}\≈(1.5~3)E_L^{*},$ It is simple a bit desirable, $E_H^{*}=2E_L^{*}.$

5) the various coefficients in the formula, μ ₁, μ ₂, μ ₃, k and c etc., can be in the laboratory, use respectively high and low can the χ ray machine, the demarcation medium (pure crude oil, pure water, pure natural gas) of irradiation different quality thickness with the experimental data that the attenuation measurement method obtains, is tried to achieve by least square fitting again.Attention: k and c can be similar to the pairing value of crude oil, also can measure data in the laboratory at various situations, build up a database, when using at the scene, obtain this data with look-up table.The last model (also can adopt other proper model) of deriving according to the utility model is calculated indexs such as water percentage in the crude oil, void fraction.

6) to the situation of Oil, Water, Gas three-phase mixture coexistence in the rock gas, above in the formula implication of each parameter constant, only the void fraction numerical value of measuring becomes big many, in like manner the oil content numerical value of Ce Lianging has diminished many.

7) to the situation of husky three coexistences of profit in the crude oil, as long as void fraction ω under the profit gas three-phase medium in the crude oil described above and the condition of depositing ₃Be revised as silt content ω ₃, other is designated as down the parameter that 3 parameter modification becomes sand, and data processing method described above can be indiscriminately imitated fully.

8) to the situation of husky three coexistences of aqueous vapor in the rock gas, as long as oil content ω under the profit sand three-phase medium described above and the condition of depositing ₂Be revised as void fraction ω ₂, and void fraction ω ₃Be revised as silt content ω ₃, other is designated as down the parameter that 2 parameter modification becomes rock gas, is designated as the parameter that 3 parameter modification becomes sand down, and data processing method described above can be indiscriminately imitated fully.

Claims (3)

1. the true dual intensity χ radionetric survey device of polyphasic flow index in the oil gas field, true dual intensity χ radionetric survey device for water percentage, oil content, void fraction or silt content index in crude oil or the rock gas, be installed on crude oil, the natural gas line, it is characterized in that: described measurement mechanism is made up of three subsystems, that is: dual intensity χ ray produces subsystem, mainly comprise X-ray machine, the detector subsystem that one cover or two cover detectors constitute, and a master control and a data processing subsystem or claim control system; Also comprise collimating apparatus, shielded-plate tube is arranged in the collimating apparatus; Described detector subsystem comprises detector, prime amplifier or photomultiplier, signal shaping, amplification, sampling, maintenance and AD converting unit, and the detector subsystem connects master control and data processing subsystem; Master control and data processing subsystem comprise data transmission, synchronously, demonstration, control and warning part; Detector is connected with collimating apparatus, and collimating apparatus is connected with control system.

2. the true dual intensity χ radionetric survey device of polyphasic flow index in the oil gas field according to claim 1, it is characterized in that: described measurement mechanism is installed on crude oil, the natural gas line, be that a end at the pipe level diameter is equipped with the χ ray that comprises χ ray machine control system and collimating apparatus, screened room and produces subsystem, in the screened room of collimating apparatus, be provided with high energy χ ray target and low energy χ ray target that the position overlaps substantially; The other end of pipe level diameter is equipped with the detector subsystem.

3. the true dual intensity χ radionetric survey device of polyphasic flow index in the oil gas field according to claim 1, it is characterized in that: avoid in the exit of χ ray machine on the direction of main beam stream, a gamma correction detector is installed, it is connected with data processing subsystem with control, and this control and data processing subsystem comprise interconnective signal shaping, amplification and sample holding unit, detector high-voltage power supply, AD converting unit, control module and data handling machine.

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