CN204113283U - A kind of based on Coplanar stripline method downhole crude detecting device for moisture content - Google Patents
A kind of based on Coplanar stripline method downhole crude detecting device for moisture content Download PDFInfo
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- CN204113283U CN204113283U CN201420382415.5U CN201420382415U CN204113283U CN 204113283 U CN204113283 U CN 204113283U CN 201420382415 U CN201420382415 U CN 201420382415U CN 204113283 U CN204113283 U CN 204113283U
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Abstract
The utility model relates to a kind of based on Coplanar stripline method downhole crude detecting device for moisture content, belongs to field of measuring technique.It comprises tool housing, sensor is provided with in described tool housing, described tool housing one end has inlet opening, described tool housing both sides have fluid hole, the described inlet opening of described sensor setting in tool housing is on the runner of fluid hole, described sensor comprises rectangle copper clad plate, described rectangle copper clad plate is provided with the Coplanar stripline of S-type layout, the top of described Coplanar stripline is connected with high-frequency phase difference detecting circuit respectively by radio frequency coaxial-cable with terminal, described high-frequency phase difference detecting circuit is connected with moisture content counting circuit, described moisture content counting circuit is connected with computer by data transmission system.What the utility model adopted is coplanar microstrip type transmission line sensor measurement crude oil water content, and because coplanar microstrip type transmission line volume is little, structure is simple, high temperature high voltage resistant.
Description
Technical field
The utility model belongs to field of measuring technique, is specifically related to a kind of based on Coplanar stripline method downhole crude detecting device for moisture content.
Background technology
In the process of oil exploitation, in order to understand the output situation of each substratum in flooding pattern, layer position detecting instrument being placed on down-hole corresponding is just needed to carry out measurement of water ratio.Downhole crude moisture content data can understand in flooding pattern the output situation of each payzone of producing well that recovers the oil, comprise kind and the output information of produced fluid, understand and whether occur to inject Shuitu and to enter or gas is advanced by leaps and bounds, inject and whether serve oil displacement efficiency etc., the shutoff of downhole perforation layer can be adjusted thus, improve oil and gas production.Therefore, downhole crude moisture content on-line real-time measuremen can reflect the duty of oil well quickly and accurately, is that evaluation oil mining is worth and formulates the important evidence of rational recovery scheme.Existing measurement crude oil water content is mainly by crude oil continuative measuring device devices such as capacitance method, conductance method, densimetry, ray method, Electromagnetic Wave Methods.
It is be based upon on the larger basis of profit difference in dielectric constant that capacitance method moisture content detects, when wet crude flows through between capacitor plate, crude oil is as the medium of capacitor, its dielectric constant changes with the difference of moisture content, the change in dielectric constant of electricity contrasted between solid dielectric, causes capacitance to change.But the range ability of capacitance method is little, and adjustability is poor, easily by surrounding environment influence, need the interference considering parasitic capacitance, will carry out temperature-compensating simultaneously during design, salinity impact is revised.Therefore, capacitance probe is generally applicable to the situation of constant temperature, not live crude, moisture content <30%.
Conductance method is a kind of method that difference according to oil, water two-phase electrical conductivity measures moisture content, also known as impedance method.It is work in continuous phase situation that conductance method is suitable for water, and when the water in detected fluid is discontinuous phase, instrument cannot normally work.Therefore, it is generally acknowledged that the measurement category of moisture content is 50% ~ 100%, precision is about ± 3%.
Density ratio juris utilizes oil different from water density, oil and water regarded as inconsistent two kinds of liquid, and when oil mixes by different proportion with water, the mixture density obtained is also different.According to oil and water hybrid density so that extrapolate crude oil water content.Densometer conventional at present mainly contains differential pressure densimeter and Coriolis flow meter.Differential pressure method, by the flow pattern of two-phase and the impact of blending viscosity, makes the measurement effect of the method unsatisfactory.Due to vibrating tube complex structure in Coriolis flow meter, cause wherein flow behavior complicated, very little gas also may make vibration signal abnormal, and the impact therefore by gassiness is larger.
Ray method moisture content meter is mainly used in the metering between oilfield metering station, but contains radiation source due to ray method, and there is biological protection and radioactive source problem of management, the shortcomings such as operation and maintenance somewhat expensive.From on-the-spot applicable cases, early stage, accuracy was higher, but the later stage lacks special maintenance, and applicable cases is not very desirable.In addition, because temperature correlation line measurement Accuracy is comparatively large, most of ray method all for the on-line measurement of moisture content in the crude oil pipeline of ground, is subject to the restriction in down-hole high temperature and space, has no report the method being applied to production logging.
Electromagnetic method can be used to detect crude oil water content, according to the height of wave frequency, can be divided into: shortwave method, Transmission line method and microwave method.Shortwave refers to that frequency is the radio wave of 3 ~ 30MHz, shortwave method measurement of water ratio scope 0 ~ 100%.Because the making of short-wave antenna probe is complicated, cost is high, operation and maintenance difficulty, and debugging operation is also more loaded down with trivial details at the scene, and in view of the foregoing, the actual use in recent years of shortwave method is less.Microwave refers to the radio wave of frequency at 300MHz ~ 3000GHz, the maximum advantage of microwave is exactly that penetration capacity is strong, can by the inside of the mode of space radiation through medium, there is the remarkable advantages such as speed of action is fast, the time is short, efficiency is high, be highly suitable for line detect, but due to microwave method more complicated, cost and maintenance cost high, cause difficulty to operation and maintenance, actual use is less.Because the electromagnetic field in transmission line is regular, be therefore suitable for contact measurement of water ratio.The form of transmission line is a lot, and conventional transmission line sensor is divided into waveguide type, coaxial-type, strip line formula and microstrip-type etc.For Transmission line method, improve electromagnetic frequency can reduce even to eliminate the impact of salinity on measure error, but electromagnetic frequency is brought up to microwave section (>=300MHz), apparatus structure will be brought complicated, high in cost of production series of problems.Compromise is considered Instrumentation Engineering actual demand and is reduced the impact of salinity error, the electromagnetic wave excites frequency usually adopted between shortwave and microwave, namely between 30 ~ 300MHz.
In sum, by the exploitation of said method in oil field to the middle and later periods, under the condition that the moisture content of crude oil is generally higher, the moisture content detecting crude oil is not effective especially.With regard to capacitance method and conductance method, measurement of water ratio scope is respectively <30% and 50% ~ 100%, do not meet the requirement that gamut detects, and although densimetry can detect in gamut, but gas a small amount of in crude oil and sand are on measurement result impact comparatively greatly, are not therefore also suitable for underground survey; There is x radiation x safety problem in ray method, shortwave method complex structure, apparatus expensive, and the two common problem is that cost is higher, and use technology difficulty, therefore gradually by market; For microwave method, detector size is comparatively large, does not meet the requirement of the size of annular space logging in production logging; Transmission line method size is less, and structure is simple, under high-moisture percentage condition, have good resolution ratio.
Utility model content
The purpose of this utility model is exactly the defect for prior art, provide a kind of structure simple and direct, normally can work in gamut and have under high-moisture percentage condition good resolution ratio based on Coplanar stripline method downhole crude detecting device for moisture content.
The technical solution adopted in the utility model is: comprise tool housing, sensor is provided with in described tool housing, described tool housing one end has inlet opening, described tool housing both sides have fluid hole, the described inlet opening of described sensor setting in tool housing is on the runner of fluid hole, described sensor comprises rectangle copper clad plate, described rectangle copper clad plate is provided with the Coplanar stripline of S-type layout, the top of described Coplanar stripline is connected with high-frequency phase difference detecting circuit respectively by radio frequency coaxial-cable with terminal, described high-frequency phase difference detecting circuit is connected with moisture content counting circuit, described moisture content counting circuit is connected with computer by data transmission system.
In such scheme, the equivalent length of Coplanar stripline determines its resolution ratio measured, therefore when small measurement space chip area is limited, the profile design of Coplanar stripline can be become end to end S type, and improve resolution ratio by the equivalent length increasing S type Coplanar stripline.
Preferred structure further, described Coplanar stripline comprises dielectric substrate, described dielectric substrate is provided with the center conductor band being raised in dielectric substrate, described center conductor band both sides are provided with the conductor plate that be raised in dielectric substrate parallel with center conductor band, are provided with spacing between described center conductor band and conductor plate.
In such scheme, because the center conductor band of Coplanar stripline and conductor plate are positioned at same plane, therefore, its structure has flexible design, be easy to integrated, easy installation, conveniently weld, facilitate co-planar waveguide TEM wave traveling, there is no the feature of cut-off frequency.
Preferred structure further, the rectangle copper clad plate of described sensor is provided with signal connection end mouth, and the top of described Coplanar stripline is connected with radio frequency coaxial-cable respectively by signal connection end mouth with terminal.
Preferred structure, is provided with sealed waterproof device outside the signal connection end mouth that described microstrip transmission line is connected with radio frequency coaxial-cable further.
Preferred structure further, described tool housing is cylindrical titanium steel steel pipe.
What the utility model adopted is coplanar microstrip type transmission line sensor measurement crude oil water content, and because coplanar microstrip type transmission line volume is little, structure is simple, high temperature high voltage resistant, is therefore applicable to very much being applied in the measurement environment that downhole temperature is high, space is little.On limited sensor area, by Coplanar stripline being designed to multistage end to end S type shape, effectively can improve the equivalent length in unit area, and then improve the resolution ratio of moisture content.Coplanar microstrip type transmission line sensor normally can work in 0% to 100% gamut at crude oil water content, and is issued to the resolution ratio of 1% in high-moisture percentage condition.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model sensor construction schematic diagram;
Fig. 3 is that the utility model utilizes sensor measurement crude oil water content schematic diagram;
Fig. 4 is the utility model Coplanar stripline structure top view;
Fig. 5 is the utility model Coplanar stripline structure side view
Fig. 6 is the utility model Coplanar stripline top and terminal electromagnetic wave signal oscillogram.
In figure, 1-tool housing; 2-sensor (2.1-rectangle copper clad plate; 2.2-Coplanar stripline; 2.21-dielectric substrate; 2.22-center conductor band; 2.23-conductor plate; 2.3-signal connection end mouth; 2.4-sealed waterproof device); 3-radio frequency coaxial-cable; 4-high-frequency phase difference detecting circuit; 5-moisture content counting circuit; 6-data transmission system; 7-computer; 8-inlet opening; 9-fluid hole.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, is convenient to be well understood to the utility model, but they do not form restriction to the utility model.
As Fig. 1, shown in Fig. 2, the utility model comprises tool housing 1, sensor 2 is provided with in described tool housing 1, described tool housing 1 one end has inlet opening 8, described tool housing 1 both sides have fluid hole 9, described sensor 2 is arranged on the runner of described inlet opening 8 to the fluid hole 9 in tool housing 1, described sensor 2 comprises rectangle copper clad plate 2.1, described rectangle copper clad plate 2.1 is provided with the Coplanar stripline 2.2 of S-type layout, the top of described Coplanar stripline 2.2 is connected with high-frequency phase difference detecting circuit 4 respectively by radio frequency coaxial-cable 3 with terminal, described high-frequency phase difference detecting circuit 4 is connected with moisture content counting circuit 5, described moisture content counting circuit 5 is connected with computer 7 by data transmission system 6.
As shown in Fig. 2, Fig. 4, Fig. 5, described Coplanar stripline 2.2 comprises dielectric substrate 2.21, described dielectric substrate 2.21 is provided with the center conductor band 2.22 being raised in dielectric substrate 2.21, described center conductor band 2.22 both sides are provided with the conductor plate 2.23 that be raised in dielectric substrate 2.21 parallel with center conductor band 2.22, are provided with spacing between described center conductor band 2.22 and conductor plate 2.23.The rectangle copper clad plate 2.1 of described sensor 2 is provided with signal connection end mouth 2.3, and the top of described Coplanar stripline 2.2 is connected with radio frequency coaxial-cable 3 respectively by signal connection end mouth 2.3 with terminal.Sealed waterproof device 2.4 is provided with outside the signal connection end mouth 2.3 that described microstrip transmission line 2.2 is connected with radio frequency coaxial-cable 3.
Described tool housing 1 can be the cylindrical titanium steel steel pipe that diameter is 21mm.
Described Coplanar stripline 2.2 surface coating one deck dielectric constant is large, and the dielectric that electrical conductivity is little, can overcome the impact of formation water salinity on measurement of water ratio result effectively.
In order to reduce the multiple reflections produced because of impedance mismatch between Coplanar stripline 2.2 and radio frequency coaxial-cable 3, time in atmosphere, the characteristic impedance of Coplanar stripline should be designed to close to 50 Ω.
High-frequency phase difference detecting circuit 4 adopts frequency mixer, being amplified, and moving Mid Frequency measurement, can significantly improve certainty of measurement by the method for mixing by being difficult to survey the accurate time difference under high frequency condition.It is 120MHz that high-frequency phase difference detecting circuit 4 comprises a kind of frequency, and amplitude is the high frequency sinusoidal signal source of 800mV.
The utility model tool housing 1 is for being organically fixed together sensor 2 and high-frequency phase difference detecting circuit 4, and form certain fluid passage, crude oil liquid is allowed to flow through sensor 2, there is sealing device 2.4 between sensor 2 and high-frequency phase difference detecting circuit 4, prevent crude oil liquid from flowing in measuring circuit.
Operating principle of the present utility model: be monotonically increasing relation based on the moisture content of crude oil and its effective dielectric constant, the principle of transmission line characteristic variations can be caused according to the dielectric constant of medium between Coplanar stripline conductor, when wet crude flows through Coplanar stripline, the crude oil of different water cut causes the change of transmission line characteristic, and then cause the electromagnetic wave phase place of transmission above-the-line promotion to offset, therefore can detect crude oil water content exactly by measuring microstrip transmission line input and output two ends electromagnetic wave phase differences.
The course of work of the present utility model: shown in composition graphs 3, frequency electromagnetic waves pumping signal is provided by high-frequency phase difference detecting circuit 4 signal source, through the top of radio frequency coaxial-cable 3 to Coplanar stripline 2.2, electromagnetic wave signal is through Coplanar stripline 2.2, when different water cut crude oil liquid flows through this sensor 2 (in figure, the direction of arrow is crude oil liquid flow direction), the transmission characteristic of Coplanar stripline 2.2 is caused to change, electromagnetic wave transmits concurrent phase offset with TEM waveshape and moves on Coplanar stripline 2.2, by radio frequency coaxial-cable 3, Coplanar stripline 2.2 terminal signaling is led to high-frequency phase difference detecting circuit 4, high-frequency phase difference detecting circuit 4 calculates the phase pushing figure of Coplanar stripline 2.2 top and terminal high-frequency signal, phase offset result delivers to moisture content counting circuit 5, and through data transmission system 6 to computer 7, computer 7 completes the display of final moisture content result and stores.At the input V of radio frequency coaxial-cable 3
s(t) and output V
rt (), form waveform as shown in Figure 6, the phase pushing figure φ between waveform and moisture content are monotonic increase relation.
The utility model using method is: by assembly pulley and armored cable lifting, device transfers the layer position to be measured lowermost end to down-hole through the annular space between oil pipe and sleeve pipe.Operating personnel at terrestrial operation cable car, by this device with the speed being not more than 600 ms/h at the uniform velocity on carry.Device obtains the crude oil water content information of current depth by fluid passage, and this modulates information is become bipolar Manchester code, transfer to ground demodulating system by the armored cable of a few km length, finally show the crude oil water content information of current depth by ground-based computer record.The structure of device is simple, under high-moisture percentage condition, have good resolution ratio, for production profile logging provides a kind of effective crude oil water content detection means.
The utility model certainty of measurement in moisture content 0% ~ 80% scope is 3%, and in moisture content 80% ~ 100% scope, certainty of measurement is 1%.
The utility model also may be used for following occasion: 1, ground crude oil pipeline moisture content on-line measurement.2, when the dielectric constant of certain liquid and water exist larger difference, can be used for the measurement of water ratio of this liquid and aqueous mixtures.3, when the dielectric constant of certain solid and water exist larger difference, can be used for the measurement of water ratio of this solid.
The content that this manual is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (5)
1. one kind based on Coplanar stripline method downhole crude detecting device for moisture content, comprise tool housing (1), it is characterized in that: in described tool housing (1), be provided with sensor (2), described tool housing (1) one end has inlet opening (8), described tool housing (1) both sides have fluid hole (9), described sensor (2) is arranged on described inlet opening (8) in tool housing (1) on the runner of fluid hole (9), described sensor (2) comprises rectangle copper clad plate (2.1), described rectangle copper clad plate (2.1) is provided with the Coplanar stripline (2.2) of S-type layout, the top of described Coplanar stripline (2.2) is connected with high-frequency phase difference detecting circuit (4) respectively by radio frequency coaxial-cable (3) with terminal, described high-frequency phase difference detecting circuit (4) is connected with moisture content counting circuit (5), described moisture content counting circuit (5) is connected with computer (7) by data transmission system (6).
2. one according to claim 1 is based on Coplanar stripline method downhole crude detecting device for moisture content, it is characterized in that: described Coplanar stripline (2.2) comprises dielectric substrate (2.21), described dielectric substrate (2.21) is provided with the center conductor band (2.22) being raised in dielectric substrate (2.21), described center conductor band (2.22) both sides are provided with the conductor plate (2.23) that be raised in dielectric substrate (2.21) parallel with center conductor band (2.22), spacing is provided with between described center conductor band (2.22) and conductor plate (2.23).
3. one according to claim 1 is based on Coplanar stripline method downhole crude detecting device for moisture content, it is characterized in that: the rectangle copper clad plate (2.1) of described sensor (2) is provided with signal connection end mouth (2.3), the top of described Coplanar stripline (2.2) is connected with radio frequency coaxial-cable (3) respectively by signal connection end mouth (2.3) with terminal.
4. one according to claim 3 is based on Coplanar stripline method downhole crude detecting device for moisture content, it is characterized in that: be provided with sealed waterproof device (2.4) outside the signal connection end mouth (2.3) that described microstrip transmission line (2.2) is connected with radio frequency coaxial-cable (3).
5. one according to claim 1 is based on Coplanar stripline method downhole crude detecting device for moisture content, it is characterized in that: described tool housing (1) is cylindrical titanium steel steel pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420382415.5U CN204113283U (en) | 2014-07-10 | 2014-07-10 | A kind of based on Coplanar stripline method downhole crude detecting device for moisture content |
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| CN201420382415.5U CN204113283U (en) | 2014-07-10 | 2014-07-10 | A kind of based on Coplanar stripline method downhole crude detecting device for moisture content |
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| CN204113283U true CN204113283U (en) | 2015-01-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141491A (en) * | 2014-07-10 | 2014-11-12 | 长江大学 | Underground crude oil water content detection device based on coplanar microstrip transmission line method |
| CN111042796A (en) * | 2018-10-12 | 2020-04-21 | 中国石油化工股份有限公司 | Oil well through-ring air separation laminar flow measuring device |
-
2014
- 2014-07-10 CN CN201420382415.5U patent/CN204113283U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141491A (en) * | 2014-07-10 | 2014-11-12 | 长江大学 | Underground crude oil water content detection device based on coplanar microstrip transmission line method |
| CN104141491B (en) * | 2014-07-10 | 2017-04-05 | 长江大学 | It is a kind of to be based on Coplanar stripline method downhole crude detecting device for moisture content |
| CN111042796A (en) * | 2018-10-12 | 2020-04-21 | 中国石油化工股份有限公司 | Oil well through-ring air separation laminar flow measuring device |
| CN111042796B (en) * | 2018-10-12 | 2023-07-11 | 中国石油化工股份有限公司 | Oil well annular space passing layered flow measuring device |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150121 Effective date of abandoning: 20170405 |