CN1099131A - Disperse phase flow-measuring method and device thereof in the two-phase fluid - Google Patents
Disperse phase flow-measuring method and device thereof in the two-phase fluid Download PDFInfo
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- CN1099131A CN1099131A CN 93112806 CN93112806A CN1099131A CN 1099131 A CN1099131 A CN 1099131A CN 93112806 CN93112806 CN 93112806 CN 93112806 A CN93112806 A CN 93112806A CN 1099131 A CN1099131 A CN 1099131A
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Abstract
The present invention relates to disperse phase flow-measuring method and device in a kind of two-phase fluid.For solving the narrow and small problem in measurement environment space in oil well, the present invention only uses a phase concentration sensor in the down-hole, longshore current body flow direction is being alternately distributed non-sensitive district and sensitizing range in its measuring sonde detection space, the sensor output signal amplitude has reflected the size of disperse phase phase concentration, utilize the pulsation that produces owing to the sensitizing range in its signal output waveform, can obtain the flow velocity of disperse phase.The measurement mechanism applicability is wide, is particularly useful for measuring the flow of layering oil phase in the oil well.
Description
The invention belongs to the flow measurement technology field, is a kind of utilize disperse phase flow velocity, phase flow rate in the Electric field phase concentration sensor measurement two-phase fluid, particularly measures the method and the corresponding device thereof of disperse phase flow velocity, phase flow rate in the interior oil-water two-phase flow body of oil well.In the two-phase fluid that flows in pipe, if measure phase flow velocity, the phase concentration of disperse phase, and the interior cross section of pipe is known, just can calculate the phase flow rate of disperse phase, and the present invention is exactly a calculated flow rate by this way.
Production logging is that output, energy-conservation, the element task that improves recovery ratio are improved in the oil field.In the oil well in the oil-water two-phase flow body disperse phase be generally oil phase.The measurement of laminated distributor under well oil phase flow velocity, flow is one of most important content in the production logging, and it is used for determining the working condition of down-hole.But in the production logging of oil well, can only the bigger indirect method of use error estimate oil phase flow velocity and flow at present, this is because in existing survey two-phase fluid in the measuring method of disperse phase flow velocity, flow, mainly due to the reason of configuration aspects, also there is not a kind of method can be used for oil well.For example known associated flow rate, flow-measuring method (" related flow measurement technology ", the Xu Lingan work, publishing house of University Of Tianjin, 19887), it is to utilize two similaritys between the phase concentration sensor output signal waveform to flow through between these two sensors apart from the required time and then the flow velocity of definite disperse phase to determine disperse phase, it needs two independently, the phase concentration sensor of performance unanimity and corresponding output channel, required lead-in wire is many, particularly the lead-in wire of following sensor need be crossed over the sensor of top, this is very difficult in the down-hole, and this makes correlation method also be not used in oil phase flow velocity in the oil well at present, the measurement of flow.
The objective of the invention is to provide the method and the corresponding device thereof of disperse phase phase flow velocity, phase concentration, phase flow rate in sensor measurement two-phase fluid of a kind of usefulness.Make it can be applicable to multiple environment for use, particularly can in oil well, use.
The object of the present invention is achieved like this: longshore current body flow direction is placed a phase concentration sensor in detected fluid, and its output signal amplitude has directly reflected the phase concentration size of disperse phase in the two-phase fluid.The sensor measurement probe detects and sets gradually one in the space on the longshore current body flow direction to several sensitizing ranges, and each both sides, sensitizing range is non-sensitive district.When the fluid of a dispersed phase fluid unit was positioned at the sensitizing range of measuring sonde in two-phase fluid, it is different that signal of sensor value and this element of fluid are positioned at the output signal value in non-sensitive when district of measuring sonde.Therefore whenever a disperse phase unit from non-sensitive district during through the sensitizing range, the also corresponding change of sensor output signal value, occur the pulsation of a correspondence in the output waveform, also have only when the sensitizing range is crossed in the disperse phase unit, just have such fluctuating signal to occur in the sensor output signal waveform.If on the measuring sonde M sensitizing range arranged, then when disperse phase unit process measuring sonde, M relevant pulsation will appear in the signal output waveform, we are calling relevant pulsation by same disperse phase unit through M the M that the sensitizing range produced pulsation, each disperse phase unit will produce one group of relevant pulsation through measuring sonde, the two-phase fluid that ought contain many disperse phase unit like this is out-of-date from the measuring sonde upper reaches, just has many groups of relevant pulsation to mix in the sensor output signal waveform interspersedly.In the relevant pulsation of each group, adjacent pulsation is exactly that the disperse phase unit passes through the required time of distance between the corresponding adjacent sensitizing range at the interval between on the time coordinate axle; In the waveform single pulsation the width on the time coordinate axle be exactly dispersed phase interface by measuring sonde on the required time of corresponding sensitizing range.Because the width of measuring sonde sensitizing range and the distance between the adjacent sensitizing range are determined, therefore just can calculate the speed of dispersed phase interface by single pulsation by measuring sonde, interval by adjacent pulses in every group of correlation pulse just can calculate the speed of disperse phase unit by measuring sonde, and these two kinds of speed are the same on reality is used.Phase flow velocity, phase concentration and the phase flow rate of disperse phase in the two-phase fluid of measuring sonde have just been obtained flowing through thus.
Owing to have only the interval of adjacent pulses in the correlation pulse to reflect that just the disperse phase unit stream crosses the speed of measuring sonde, therefore will from the pulsation that the sensor output signal waveform mixes, distinguish out the relevant pulsation of one group of group.Because the arrangement of measuring sonde sensitizing range is fixed, so the ratio at the interval of each pulsation equals the ratio of the spacing of each sensitizing range of measuring sonde in the correlation pulse, thereby just can find out the relevant pulsation of one group of group thus and calculate the phase velocity that flows through the measuring sonde disperse phase from signal output waveform, the sensor measurement probe needs three sensitizing ranges at least for this reason.
If the sensitizing range of sensor measurement probe is equidistant the arrangement, also can finds out the relevant pulsation of one group of group and directly look for the interval of adjacent pulses in the correlation pulse.Because in the sensor output signal waveform in the interval between all any two pulsation, that vary in size, the interval that occurrence number is maximum is exactly that the disperse phase unit is through the required time of distance between the adjacent sensitizing range of measuring sonde, the interval of adjacent pulses in the correlation pulse just, therefore as long as find the highest interval of this probability of occurrence in the interval between all any two pulsation the signal output waveform in a period of time from sensor, just can obtain flowing through the phase velocity of measuring sonde disperse phase, the sensor measurement probe needs two sensitizing ranges at least for this reason.
According to the designed corresponding measurement mechanism of measuring method provided by the invention, to form by above ground portion and down-hole part, above ground portion is made of land circuit unit, A/D change-over panel, computing machine etc.; The down-hole part is made of sensor and measuring sonde and logging cable.Longshore current body flow direction has one to several sensitizing ranges in the measuring sonde phase concentration detection space, the both sides of each sensitizing range are non-sensitive district, the inhomogeneous sensitizing range and the non-sensitive district that has constituted measuring sonde of physical dimension that measuring sonde is axial or dielectric property, with on the electrode in the measuring sonde once to several perpendicular to the outstanding disk of interior electrode axis or near the medium socket of interior electrode the conductor in the groove constituted the sensitizing range, the width of sensitizing range less than the size of disperse phase unit in the survey two-phase fluid to improve the fluid-velocity survey precision.Used phase concentration sensor is that the widely used shortwave type in domestic each oil field contains water sensor.
The present invention is because only with a phase concentration sensor and measuring sonde, do not need cross-line, lead-in wire is few, does not have the moving machinery parts, and structure and circuit are simple and clear, sensor and measuring sonde adopt ripe, easy, reliable technology to make one, volume is little, whole device reliability height, and applicability is wide, can be used for general environment, can be used in particularly that thousands of rice is dark, the space is narrow and small, in the oil well of high temperature, high pressure.
Provide by following embodiment and accompanying drawing thereof according to concrete measurement mechanism proposed by the invention.
Fig. 1 is the sectional view of measuring sonde part in the used concrete measurement mechanism of the disperse phase flow-measuring method that proposes of the present invention;
Fig. 2 is the system chart of entire measuring device;
Fig. 3 is the functional block diagram of land circuit unit;
Fig. 4 is the time dependent waveform synoptic diagram of sensor output signal amplitude;
Fig. 5 is a computer programme flow diagram of calculating flow velocity;
Fig. 6 is the measuring sonde sectional view that is used for deep-well;
Fig. 7 is the sectional view that has only the measuring sonde of a sensitizing range.
Describe the details of measuring sonde in the concrete measurement mechanism that proposes according to the present invention and the working condition and the course of work of whole device in detail below in conjunction with embodiment and accompanying drawing.
Comprise among Fig. 1 containing water sensor 1, sensor 1 is connected to measuring sonde, and it mainly contains interior electrode 2, medium socket 3, sheath 4 compositions.Sheath 4 is metal tubes of a diameter 25mm; have the entrance and exit of fluid above; containing water sensor and measuring sonde other parts except that sheath all is contained in the sheath; the sensitizing range of measuring sonde is between the entrance and exit of sheath; sheath links to each other with the shell of sensor; it is except playing the protection instrument, provide the fluid measurement passage, or the external electrode of measuring sonde.Between electrode and the medium socket, the manufacturing process of measuring sonde was fairly simple like this in epoxy resin 5 was filled in.Medium socket 3 existing insulating effects also play electrode 2 in the protection.Three equidistant outstanding disks of arranging 6 are arranged on the interior electrode 2, this makes that near the electric field the disk is local strong than other, so be called sensitizing range 7,8,9, the both sides of sensitizing range 7,8,9 are non-sensitive district 10,11,12,13, and the very thin thickness of disk has only 1mm, and the spacing of disk has 10mm, this makes the width of sensitizing range, and relatively their spacing is very little, and the chance of pulsation overlapping is few in the sensor output signal waveform like this, helps improving the fluid-velocity survey precision.
14 is sensor and measuring sonde among Fig. 2; 15 transmission channels of forming by the long logging cable of several kms when being used to log well, it couples together sensor and land circuit unit 16; Land circuit unit 16 provides the working power of 12V for sensor, and signal of sensor is carried out rough handling, again signal is delivered to A/D plate 17, and conversion is sent in the computing machine 18 and handled through A/D.
Fig. 3 is the functional block diagram of land circuit unit, and the land circuit unit is grouped into by working power 19 and signal processing part.According to the tested flow rates in scene is the situation of 1cm/s to 50cm/s, and signal of sensor is the low-pass filtering 20 of 500Hz through cutoff frequency earlier, to filter undesired signal, is divided into two the tunnel, the one tunnel then and directly exports the A/D sampling to as moisture signal; The high-pass filtering 21 that another road process cutoff frequency is 3Hz is amplified 22 backs again and is exported as flow velocity signal.This two paths of signals is delivered to the sampling of A/D plate, and sample frequency is 1000Hz.
In when well logging, at first sensor and measuring sonde are sent with logging cable and go into the well, pass the annular space between oil pipe and the sleeve pipe, be parked in convenient can the beginning of going up of test layer position and measure, at this moment the oil well operate as normal.When each test, with computing machine show, record, store the signal of sensor waveform treat well logging finish after computing again.
When the non-sensitive district 10 that is oil droplet 7 the right from the sensitizing range when disperse phase unit in the oil-water two-phase flow body that flows into sheath in the down-hole flowed through sensitizing range 7, the output signal value that contains water sensor 1 changed, and rises or descends; When this oil droplet flows through sensitizing range 7 and enters the non-sensitive district 11 on its left side, the output valve that contains water sensor 1 is recovered to original direction, promptly descend or rise, a pulsation 23 appears in sensor 1 signal output waveform (Fig. 4) like this, be crest or trough, there is not essential distinction between the two, so following pulsation says that all becoming is crest.When this oil droplet then flows through two sensitizing ranges 8,9 of back, the crest of two correspondences equally also can appear in sensor 1 signal output waveform, and 24,25,23,24,25 these three crests are exactly one group of relevant crest.Because synchronization often has many oil droplets in the space exploration of probe, therefore in the signal of sensor waveform, there are many not relevant on the same group crests to mix interspersedly, if two crests 23,26 is uncorrelated, be that they are by two different crests that oil droplet produced, then the speed of oil droplet is not reflected at the interval between them, has only the peak-to-peak time interval of adjacent wave in the relevant crest, as crest 23 and 24 and crest 24 and 25 between the time interval be only oil droplet by the used time of the spacing between the adjacent sensitizing range, as sensitizing range 7 and 8 and sensitizing range 8 and 9 between the used time of spacing.To from signal output waveform, find the interval of adjacent peaks in the relevant crest, can utilize following characteristic, at first for one group three the relevant crest that in signal output waveform, produces by oil droplet, middle former and later two crests of crest and it be identical at interval; Two peak-to-peak intervals of adjacent wave in its correlations crest with respect to the interval of other any two crests, want big at the probability that signal output waveform occurs.Computing machine can be judged the interval of adjacent peaks in the relevant crest and then calculate the speed that oil droplet flows through measuring sonde according to these characteristics.
Fig. 5 is the flow chart that calculates oil droplet speed according to the described method of epimere, at first open the data file of storing signal output waveform, read the signal output waveform of a bit of time, therefrom determine the position of each crest, utilize the described method of epimere to determine the interval of adjacent peaks in the relevant crest again, and then the signal output waveform of reading a bit of time is carried out same processing, so circulation is until handling whole signal output waveforms, the result of each segment is averaged, obtain adjacent peaks mean value at interval in the relevant crest of whole test period, and then obtain the average velocity V that oil droplet flows through measuring sonde.
The phase concentration of oil phase is that oil holdup can obtain from the amplitude of sensor output signal in the oil-water two-phase flow body, whole test period output signal value averaged obtain mean value, utilize the calibration curve of oil holdup and sensor output signal magnitude relation just can obtain the average oil holdup q of whole test period then.
The flow Q of oil phase is calculated by following formula in the oil-water two-phase flow body
Q＝A·C·q·V
A is the net flow sectional area of oil-water two-phase flow body in sleeve pipe in the formula, in use be known: C considers that oil droplet flows through the speed of measuring sonde and is not equal to the correction factor that the average velocity of oil phase on whole flow section is introduced, the demarcation of this coefficient, both can on model well, carry out, also can when the on-the-spot test of down-hole, carry out, below down-hole oil tube all go out the position is surveyed above the liquid layer position oil phase flow should be consistent with the oil phase flow that the ground well head is surveyed with other device, can demarcate C with this.
Fig. 6 is the measuring sonde that is used for the deep-well test, because deep-well well temperature is high, and epoxy resin 5 non-refractories among Fig. 1 in the measuring sonde.Measuring sonde among Fig. 6 is without epoxy resin, on interior electrode, overlap the medium socket 27 of a polyimide earlier, three ring recess are arranged on the medium socket 27, be wound with lead 28 in the groove, and then putting polyimide medium socket 3, the sensitizing range of measuring sonde is to utilize the lead 28 and the capacitive coupling of interior electrode to form.
Device and measuring process and the same substantially (Fig. 7) described in the embodiment 1 that embodiment 2 is used, different just measuring sonde structure and flow velocity computing method.Oil droplet is exactly the sensitizing range required times of water-oil interface by measuring sonde by the width of the crest that the measuring sonde sensitizing range produces, and present embodiment calculates the flow velocity of oil phase in view of the above.Ask flow velocity only to relate to single crest with this method, the interval that does not relate to adjacent peaks in the relevant crest, have severally the sensitizing range of used measuring sonde can resemble among the embodiment 1, also can have only one, the sensitizing range is rare to be beneficial to and to reduce the crest caused error that overlaps.
An outstanding disk 35 is arranged on 32 at the electrode in the measuring sonde among Fig. 7, ground connection cover 30 with link to each other on the shell of sensor is electric, it has shielded the major part of interior electrode so that measuring sonde has only a sensitizing range 29, the right and wrong sensitizing range, both sides 34 of sensitizing range, the insulation that disk and ground connection were overlapped on the electrode tip in tetrafluoro sheet 31 was used for, 33 can filled media between interior electrode and the ground connection cover, also can on interior electrode, put insulation sleeve, whole outside puts the medium socket 3 of polyimide again.This structure makes the width of sensitizing range and the sizableness of oil droplet, and having reduced the oil droplet overlapping like this is the chance that crest overlaps, and has improved the fluid-velocity survey precision.
Claims (7)
1, disperse phase flow-measuring method in a kind of two-phase fluid, the output of the disperse phase concentration sensor that longshore current body flow direction is placed in tested two-phase fluid is as detection signal, sensor output signal uses Computer Processing in the hope of the disperse phase flow after data acquisition, the phase concentration of disperse phase can directly obtain from the sensor output signal amplitude, it is characterized in that: phase concentration, phase flow velocity with disperse phase in the sensor measurement two-phase fluid; Be spaced non-sensitive district and sensitizing range successively on the longshore current body flow direction in the detection space of sensor measurement probe; In the many pulsation that in two-phase fluid, in the sensor output signal waveform, produce during disperse phase flows through sensor measuring sonde sensitizing range, find the interval of adjacent pulses in the correlation pulse and then obtain the flow velocity of disperse phase; The width that produces pulsation in the time of can also utilizing dispersed phase interface in the sensor output signal waveform through the measuring sonde sensitizing range determine dispersed phase interface by this sensitizing range required time to obtain the flow velocity of disperse phase.
2, according to the described measuring method of claim 1, it is characterized in that utilizing the ratio at the interval between the correlation pulse be proportional to corresponding sensitizing range on the measuring sonde spacing than this condition, from the pulsation of signal output waveform, distinguish the interval of adjacent pulses in the relevant pulsation of one group of group and then the definite correlation pulse.
3, according to the described measuring method of claim 1, it is characterized in that utilizing following condition to try to achieve the interval of adjacent pulses in the correlation pulse, promptly for the equidistant measuring sonde of arranging in sensitizing range, in the time interval in its sensor output signal waveform between any two pulsation, the interval that probability of occurrence is the highest is exactly the interval of adjacent pulses in the correlation pulse.
4, disperse phase flow measurement device in a kind of two-phase fluid, form by measuring sonde, phase concentration sensor, land circuit unit, A/D converter, computing machine etc., it is characterized in that utilizing at the measuring sonde phase concentration and detect the axial physical dimension of place, space measuring sonde or the inhomogeneous sensitizing range and the non-sensitive district that constitutes measuring sonde of dielectric property.
5,, it is characterized in that forming the sensitizing range with disk (6) outstanding on the electrode in the measuring sonde according to the described a kind of measurement mechanism of claim 4.
6,, it is characterized in that forming the sensitizing range with the conductor of going up in the groove near the outer medium socket (27) of interior electrode in the measuring sonde (28) according to the described a kind of measurement mechanism of claim 4.
7, according to the described a kind of measurement mechanism of claim 4, it is characterized in that major part with electrode (32) in ground connection cover (30) shielding is lived in the measuring sonde makes it only to expose disk (35) on the head to form single sensitizing range (29), the width of sensitizing range is less than the size of disperse phase unit in the survey two-phase fluid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 93112806 CN1099131A (en) | 1993-12-23 | 1993-12-23 | Disperse phase flow-measuring method and device thereof in the two-phase fluid |
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| CN 93112806 CN1099131A (en) | 1993-12-23 | 1993-12-23 | Disperse phase flow-measuring method and device thereof in the two-phase fluid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526224A (en) * | 2016-11-15 | 2017-03-22 | 东北大学 | Solid-liquid two-phase flow velocity measurement device and method |
| CN111257588A (en) * | 2020-01-17 | 2020-06-09 | 东北石油大学 | ORB and RANSAC-based oil phase flow velocity measurement method |
| CN111351958A (en) * | 2018-12-21 | 2020-06-30 | 上海华虹计通智能系统股份有限公司 | Time delay detection method and device, and fluid speed measurement method and system |
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1993
- 1993-12-23 CN CN 93112806 patent/CN1099131A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526224A (en) * | 2016-11-15 | 2017-03-22 | 东北大学 | Solid-liquid two-phase flow velocity measurement device and method |
| CN111351958A (en) * | 2018-12-21 | 2020-06-30 | 上海华虹计通智能系统股份有限公司 | Time delay detection method and device, and fluid speed measurement method and system |
| CN111351958B (en) * | 2018-12-21 | 2021-11-02 | 上海华虹计通智能系统股份有限公司 | Time delay detection method and device, and fluid speed measurement method and system |
| CN111257588A (en) * | 2020-01-17 | 2020-06-09 | 东北石油大学 | ORB and RANSAC-based oil phase flow velocity measurement method |
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