CN2122934U - High-frequency electromagnetic oscillating water-holding ratio instrument - Google Patents
High-frequency electromagnetic oscillating water-holding ratio instrument Download PDFInfo
- Publication number
- CN2122934U CN2122934U CN92223160U CN92223160U CN2122934U CN 2122934 U CN2122934 U CN 2122934U CN 92223160 U CN92223160 U CN 92223160U CN 92223160 U CN92223160 U CN 92223160U CN 2122934 U CN2122934 U CN 2122934U
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- CN
- China
- Prior art keywords
- retention rate
- water retention
- sensor
- water
- instrument
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model belongs to an oilfield logging instrument. The measurement of water retention rate in the test of an oil well is essential. The instrument of water retention rate in a capacitor type at home and abroad at prior has sensitivity decrease in the condition of high water bearing and response capability loss or very low sensitivity in the condition that the water retention rate is higher than 40%. The utility model adopts the electromagnetic wave of high frequency to measure the water retention rate and overcomes the influence of the electric conduction of stratum water to the instrument sensitivity. High sensitivity is also obtained in the condition that the water retention rate is higher than 40%. The measured water retention rate and the actual water retention rate are coincided.
Description
The utility model is a kind of oil well logging instrument, is used to measure liquid aqueous ratio, i.e. specific retention in the oil well.
At present, the instrument of measuring liquid specific retention in the oil well both at home and abroad mostly is the condenser type water holdup tool, and it is made up of sensor, circuit board, housing, joint.Sensor is a changes in capacitance with the change transitions of fluid to be measured specific retention, circuit part becomes the signal of telecommunication with the variation of sensor capacitance again, this signal is sent into ground recording system by cable, therefore by measuring the signal of water holdup tool output, can calculate the fluid to be measured specific retention.Under the existing water holdup tool situation that the liquid specific retention is high in well, sensitivity is very low.Expert and field technician generally believe: existing water holdup tool resolution capability under high aqueous conditions is low, and institute's survey data can only qualitatively be used; Be lower than 30% at the fluid to be measured specific retention, flow pattern is under the condition of emulsus, and recording curve can quantitatively use with reference to doing; When the fluid to be measured specific retention was higher than 40%, instrument lost resolution capability.Water holdup tool sensitivity under high aqueous conditions descends, and analysis brings very big difficulty to well-log information, makes accurately to calculate liquid specific retention in the well.Cause water holdup tool low reason of sensitivity under high aqueous conditions to be: what existing water holdup tool adopted is the method that sensor capacitance is participated in vibration directly.Just sensor capacitance is inserted oscillating circuit as a transfiguration device, with the height of sensor capacitance control generator output pulse signal frequency.Because be subjected to the restriction of oscillator stability, frequency of oscillation can not be selected De Taigao.When existing instrument was in the water, the oscillator output frequency was below 100KHz.Because frequency of oscillation is low, be difficult to overcome the influence of formation water conduction.Water holdup tool is by measuring transducer capacitance measurement specific retention, and sensor capacitance is by the liquid decision of internal and external electrode physical dimension, insulation sleeve size and material property and flow sensor.Because formation water has electric conductivity, the liquid of flow sensor is equivalent to the sensor external electrode has been extended to the insulation sleeve external surface under high aqueous conditions, therefore the sensor capacitance electric capacity of insulation sleeve correspondence just, it is almost irrelevant with the liquid property (or specific retention) of flow sensor.This has just caused water holdup tool to lose responding ability inevitably or sensitivity descends.
The purpose of this utility model is a kind of high sensitivity water holdup tool of design.Even measure highly when liquid, aqueous, also can keep good measurement effect.Be exactly to improve wave frequency specifically, overcome the low shortcoming of former water holdup tool frequency of oscillation, and then overcome the influence of formation water conduction.
The technical solution of the utility model is: the high-frequency generator of a 100KHz-20000MHz is set in the water holdup tool circuit, and the signal of high-frequency generator output has been added on the potential-divider network of being connected by fixed capacity and sensor capacitance; Sensor capacitance divides the pulse signal voltage to become DC voltage by wave detector, and this voltage is in order to the height of control voltage controlled oscillator output pulse signal frequency; The pulse signal of voltage controlled oscillator output is sent into cable core by driver.
In order to overcome the influence of formation water conduction, adopted high-frequency generator.High-frequency generator can be made of not gate, crystal and capacitance resistance ware.
Adopted wave detector for sensor capacitance being divided the pulse voltage signal become d. c. voltage signal, it is made up of diode, electric capacity and resistance.
In order to use single-core cable to measure specific retention, adopted voltage controlled oscillator.It is made up of amplifier, transistor and capacitance resistance ware.Certainly, using under the situation of multicore cable, also can be without voltage controlled oscillator, and adopt d. c. voltage signal output.
The utility model has improved the wave frequency of acquisition sensor electric capacity (or specific retention), thereby has overcome the influence of formation water conduction to instrumental sensitivity.Make water holdup tool under the fluid to be measured specific retention is condition more than 40%, have higher sensitivity equally, realized that the measurement specific retention is consistent with actual specific retention.
Description of drawings:
Fig. 1 is a high-frequency electromagnetic vibration water holdup tool generalized section.Each several part is not among the figure: electrode, 7-external electrode, 8-lower contact in 1-top connection, 2-housing, 3-circuit board, 4-sensor, 5-insulation sleeve, the 6-.
Fig. 2 is a high-frequency electromagnetic vibration water holdup tool circuit diagram.Each element is respectively among the figure: U
1-three terminal regulator, U
2-four nor gate, U
3-amplifier, Q
1～Q
6Transistor, VR
1～VR
3-voltage-stabiliser tube, P
1-potentiometer, Y
1-crystal, R
1～R
14-resistance, C
1～C
12-electric capacity.
Embodiment:
According to technique scheme, can make the high-frequency electromagnetic vibration water holdup tool that is used for annular space log, it is made up of top connection, housing, circuit board, sensor and lower contact.In the circuit, the high-frequency generator optional frequency is 3MHz.Be illustrated below in conjunction with accompanying drawing.
Make circuit board 3 according to circuit diagram shown in Figure 2, sensor 4, circuit board 3, housing 2, top connection 1, lower contact 8 are assembled by Fig. 1, and weld the lead-in wire of circuit board electrode to top connection and the sensor.Connect cable and ground recording system gets final product work.
When by ground system to instrument be provided with-during the voltage of 20 ± 2V, by transistor Q
1, Q
2With integrated package U
1Deng the DC voltage of the power circuit of forming at V+, V-two ends generation 10V, other parts are used in this voltage supply circuit.Nor gate U
2A and crystal Y
1On formed 3MHz oscillator, it is exported by U
2A, U
2C and U
2D has been added to capacitor C after driving
5On the potential-divider network of forming with sensor capacitance.CR
2, CR
3, C
6, C
7And R
6Formed wave detector, it divides the pulse signal voltage to change DC voltage into sensor.Amplifier U
3With transistor Q
3, Q
4, Q
5Formed voltage controlled oscillator.Potentiometer P
1Be used to regulate the height of voltage controlled oscillator output frequency.When instrument was in the air, output frequency should be 4KHz.From the pulse signal of voltage controlled oscillator output through Q
6Drive the back by capacitor C
11, C
12Be coupled to cable core E
1On.VR
3, CR
4, CR
5, R
14And R
8Formed temperature-compensation circuit.End points E1 stube cable core, E
2Connect tool housing, E
3Connect electrode in the sensor.
Claims (4)
1, a kind of water holdup tool, formed by sensor, circuit board, housing, joint, it is characterized in that: adopt high-frequency generator in the circuit, the high-frequency generator frequency is between 100KHz-20000MHz, the high-frequency generator output pulse signal has been added on the potential-divider network that is participated in by sensor capacitance, and sensor capacitance divides the pulse signal voltage to become DC voltage by wave detector.
2, water holdup tool as claimed in claim 1 is characterized in that: high-frequency generator is by not gate, and crystal and capacitance resistance ware are formed.
3, as claim 1,2 described water holdup tools, it is characterized in that: potential-divider network is composed in series by fixed capacity (resistance or inductance) and sensor capacitance.
4, as claim 1,2,3 described water holdup tools, it is characterized in that: wave detector is made up of diode, electric capacity and resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92223160U CN2122934U (en) | 1992-06-03 | 1992-06-03 | High-frequency electromagnetic oscillating water-holding ratio instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN92223160U CN2122934U (en) | 1992-06-03 | 1992-06-03 | High-frequency electromagnetic oscillating water-holding ratio instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2122934U true CN2122934U (en) | 1992-11-25 |
Family
ID=4965930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92223160U Granted CN2122934U (en) | 1992-06-03 | 1992-06-03 | High-frequency electromagnetic oscillating water-holding ratio instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2122934U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051156C (en) * | 1993-07-07 | 2000-04-05 | 石油大学 | Wave-guide measuring method for water-holding rate of oil well |
| CN101419182B (en) * | 2008-10-22 | 2012-07-25 | 王一鸣 | Soil moisture measurement sensor and measurement method thereof |
| CN103512601A (en) * | 2012-06-26 | 2014-01-15 | 克罗内分析学有限责任公司 | Measuring device for determining a process variable |
| CN103867183A (en) * | 2012-12-18 | 2014-06-18 | 中国石油化工股份有限公司 | Transient electromagnetic method through casing water exploration tester |
| CN106246174A (en) * | 2016-08-12 | 2016-12-21 | 中国石油天然气集团公司 | A kind of column specific retention detection probe based on electromagnetic wave |
-
1992
- 1992-06-03 CN CN92223160U patent/CN2122934U/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1051156C (en) * | 1993-07-07 | 2000-04-05 | 石油大学 | Wave-guide measuring method for water-holding rate of oil well |
| CN101419182B (en) * | 2008-10-22 | 2012-07-25 | 王一鸣 | Soil moisture measurement sensor and measurement method thereof |
| CN103512601A (en) * | 2012-06-26 | 2014-01-15 | 克罗内分析学有限责任公司 | Measuring device for determining a process variable |
| CN103867183A (en) * | 2012-12-18 | 2014-06-18 | 中国石油化工股份有限公司 | Transient electromagnetic method through casing water exploration tester |
| CN106246174A (en) * | 2016-08-12 | 2016-12-21 | 中国石油天然气集团公司 | A kind of column specific retention detection probe based on electromagnetic wave |
| CN106246174B (en) * | 2016-08-12 | 2019-06-11 | 中国石油天然气集团公司 | A kind of column specific retention detection probe based on electromagnetic wave |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |