CN206035475U - C/Hratio pulsed neutron multi -parameter logging instrument - Google Patents
C/Hratio pulsed neutron multi -parameter logging instrument Download PDFInfo
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- CN206035475U CN206035475U CN201621021778.1U CN201621021778U CN206035475U CN 206035475 U CN206035475 U CN 206035475U CN 201621021778 U CN201621021778 U CN 201621021778U CN 206035475 U CN206035475 U CN 206035475U
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Abstract
The utility model belongs to oil instrument and meter field especially relates to a C/Hratio pulsed neutron multi -parameter logging instrument. Including outer pillar and set gradually outside in the pillar and tight volution, detector, neutron generator and neutron generator drive control unit, the neutron generator drive control unit is connected with neutron generator, neutron generator includes seal outer tube and sets gradually neutron tube, voltage -doubling circuit and the he3 pipe in seal outer tube, neutron tube and voltage -multiplying circuit connection, the detector is including setting gradually gamma detector and the hot neutron detector in the thermos. The utility model overcomes neutron generator fault rate height, neutron yield monitoring that current homemade pulsed neutron instrument exists are inaccurate, the not good defect of two gamma detector results of use.
Description
Technical field
This utility model belongs to oil instrument field, more particularly to a kind of well logging of C/Hratio pulsed neutron multiparameter
Instrument.
Background technology
In petroleum exploration and development, the monitoring of downhole in reservoir characteristic can determine that oil reservoir, provide remaining oil saturation, water logging journey
Degree, oil-water interfaces, formation porosity, formation lithology and constituent content parameter, be oil field development tap the latent power, oil formation improvement, distinguish oil
Water termination, determine water logging grade, stratum element analysis etc. provide foundation.Based on the radioactive logging technology of pulsed neutron, it is mesh
It is front for reservoir performance monitors such as remaining oil saturations, the preferable means of accuracy of measurement.
Due to the application of new technique, external impulse neutron logging tool develops progressively towards synthesization, digitized direction, tool
Contain much information, the features such as measurement parameter is more, certainty of measurement is high.But the logger introduced is expensive, limited amount, together
When neutron generator import be restricted, the import of neutron generator and to reprocess the cycle long, it is impossible to meet In Oil Field Exploration And Development
The needs of middle monitoring reservoir saturation.
In recent years, domestic each oil instrument producer also released one after another production domesticization impulse neutron logging tool.But state
Produce instrument generally existing and neutron generator fault rate height, the unstable problem of yield.Domestic equipment is to adopt TTLC simultaneously
The value indirect monitoring neutron yield of (carbon aggregate number), thus cause neutron yield it is unstable when can not make tune in time
It is whole, affect well logging accuracy；In addition, domestic equipment is using double gamma-ray probes, one is used for measurement stratum information, and one is used for surveying
Amount wellbore information, goes to eliminate impact of the well to formation information using the wellbore information for obtaining.Although the method is possible in theory,
But affected away from, elimination algorithm by probe energy resolution, source in actual use, practical effect is very poor, it is basic to rise not
To what effect.
The content of the invention
Technical problem to be solved in the utility model is to provide a kind of C/Hratio pulsed neutron multi-parameter logger, to
Overcome neutron generator fault rate height, the neutron yield monitoring of existing domestic pulsed neutron instrument presence inaccurate, double gamma detections
The not good defect of device using effect.
For solving above-mentioned technical problem, the technical scheme adopted by this utility model is：There is provided in a kind of C/Hratio pulse
Sub- multi-parameter logger, which is characterized in that：Including outer protection tube and simultaneously tight volution, the detection that are successively set in outer protection tube
Device, neutron generator and neutron generator drive control unit, above-mentioned neutron generator drive control unit and neutron generator
Connection；
Above-mentioned neutron generator include sealed outer pipe and the neutron tube being successively set in sealed outer pipe, voltage-multiplying circuit and
He3Pipe, above-mentioned neutron tube, voltage-multiplying circuit are mounted in inside sealed outer pipe, and above-mentioned neutron tube and voltage-multiplying circuit connect；
Above-mentioned detector includes gamma detector and the thermal-neutron detector being successively set in thermos flask；
Shield is provided between above-mentioned detector and neutron generator, and outer protection tube one end is connected with head harness by top connection
Connect, the other end is provided with tail and blocks up.
Above-mentioned voltage-multiplying circuit is mounted on voltage-multiplying circuit skeleton, and voltage-multiplying circuit skeleton is located inside sealed outer pipe.
Some strata imide membranes are wound outside above-mentioned neutron tube.
Sulfur hexafluoride gas are filled with above-mentioned sealed outer pipe.
Above-mentioned gamma detector and thermal-neutron detector share a set of pre-amplification circuit.
The beneficial effects of the utility model are：
This utility model provides a kind of radioactive logging instrument based on pulsed neutron, using neutron generator to stratum
Transmitting high energy pulse neutron, detects derivative gamma ray spectroscopy (inelastic spectrum, capture that neutron is interacted with stratum element
Spectrum), the analysis and process of modal data is carried out through ground numerical control system, have very much so as to obtain geological structure element relative amount etc.
The well-log information of value, provides technology number for calculating the oil field geologic such as oil-water ratio relation, residual oil saturation analysis in stratum
According to by parsing the data that measurement is obtained, the corresponding DP technology measure of formulation reaches the mesh that oilfield producing well increases production and improves productivity
's.
Specifically, this utility model has the advantage that：
1st, this utility model adopts special double detector, and with good energy resolution, linearity error is little, heat stability
Good, anti-electromagnetic interference capability is strong, disturbs insensitive to neutron；Instrument can measure gamma spectra, time spectrum and thermal neutron simultaneously
Life-span.
2nd, He is added in this utility model neutron generator3Pipe, for being directly monitored by the stability of neutron yield, is easy to
In time neutron yield is adjusted, it is ensured that the reliability of logging data quality.
Description of the drawings
Fig. 1 is this utility model structural representation；
In figure：In 11. halter, 12. top connection 13. 15. detector of tight 14. electronic circuit of volution, 16. shield 17.
Stifled 110. tails of 18. neutron generator drive control unit of electronic generator, 19. outer protection tube tail are blocked up；
Fig. 2 is neutron generator schematic diagram；
In figure：21. sealed outer pipe, 22. neutron tube, 23. voltage-multiplying circuit skeleton, 24. voltage-multiplying circuit 25.He3Pipe；
Fig. 3 is detector schematic diagram；
In figure：31.He335. Magnet clamp of pipe 32. damping spring, 33. pre-amplification circuit, 34. bleeder circuit, 36. photoelectricity
37. thermos flask of multiplier tube, 38. scintillation crystal.
Specific embodiment
Neutron is produced from neutron tube, and nuclear reaction occurs with stratum element, on different time, produces the gamma of various energy
Ray, can go out the time spectrum and energy spectrum of various non-ballistic-capture gamma rays by Annual distribution or energy distribution measurement.Analysis
The energy of measured gamma ray with count the power spectrum of composition i.e. can definitely element contained by layer type and quantity.
Based on as above theory, this utility model provides a kind of C/Hratio pulsed neutron multi-parameter logger referring to Fig. 1, should
Instrument includes head harness 11, top connection 12, and tight volution 13, electronic circuit 14, detector 15, shield 16, neutron generator
17th, neutron generator drive control unit 18, outer protection tube 19, tail stifled 110.
Below, accompanying drawing will be combined to be described in detail this utility model：
1st, the design and realization of neutron generator
Referring to Fig. 2, neutron generator provides controllable neutron source for instrument, is one of core component of whole instrument.Neutron
Generator includes sealed outer pipe 21, neutron tube 22, voltage-multiplying circuit skeleton 23, voltage-multiplying circuit 24, He3Pipe 25；He3Pipe 25 loads again
One end of pressure skeleton 23, voltage-multiplying circuit 24 is fixed on the voltage-multiplying circuit skeleton 23 that teflon rod is processed into, and and neutron
22 target voltage of pipe is connected.After neutron tube 22 is connected with voltage-multiplying circuit 24, insulation processing is carried out with Kapton, then filled
Enter 21 in sealed outer pipe.Sealed outer pipe 21 is carried out into evacuation process, sulfur hexafluoride gas are finally injected.
2nd, the design and realization of detector
Referring to Fig. 3, detector is primarily used to receive gamma ray and the quilt ground inspired by neutron in stratum
Thermal neutron after layer slowing down.Detector includes thermos flask 37, gamma detector and thermal-neutron detector.In order to avoid well logging
Impact of the middle pit shaft high temperature to detector, gamma and neutron detector are loaded in thermos flask 37.
Wherein gamma detector includes photomultiplier tube 36, and Magnet clamp 35, scintillation crystal 38, bleeder circuit 34 are preposition
Amplifying circuit 33；Thermal-neutron detector includes He3Pipe 31, pre-amplification circuit 33；Photomultiplier tube 36 loads Magnet clamp 35
It is interior, the impact of stratum magnetic field and the sleeve pipe that is magnetized to photomultiplier tube 36 can be prevented；In order to reduce bottom hole temperature (BHT) to detector
Impact, photomultiplier tube 36, scintillation crystal 38, bleeder circuit 34, pre-amplification circuit 33 load in thermos flask.
Measurement process of the present utility model is：
Instrument is turned on the power after ground connects, and checks communication, it is all normal after start decentralization.Instrument lowering velocity is not
More than 3000m/h.After instrument transfers to target zone, depth correction is carried out.Logging operation personnel are soft by ground-based computer observing and controlling
Part, carries out parameter configuration to downhole instrument and starts neutron generator starting well logging.Downhole instrument is by instrument state and obtains
Gamma-spectrometric data is sent to ground numerical control system by logging cable and is shown and processed.
Claims (6)
1. a kind of C/Hratio pulsed neutron multi-parameter logger, it is characterised in that：Protected including outer protection tube and setting gradually outside
In pipe and tight volution, detector, neutron generator and neutron generator drive control unit, the neutron generator drive control
Unit processed is connected with neutron generator；
The neutron generator includes sealed outer pipe and the neutron tube being successively set in sealed outer pipe, voltage-multiplying circuit and He3
Pipe, the neutron tube and voltage-multiplying circuit connection；
The detector includes gamma detector and the thermal-neutron detector being successively set in thermos flask.
2. a kind of C/Hratio pulsed neutron multi-parameter logger according to claim 1, it is characterised in that：The detector
Shield is provided with and neutron generator between, and outer protection tube one end is connected with head harness by top connection, and the other end is provided with tail
It is stifled.
3. a kind of C/Hratio pulsed neutron multi-parameter logger according to claim 1 and 2, it is characterised in that：Described times
Volt circuit is mounted on voltage-multiplying circuit skeleton, and voltage-multiplying circuit skeleton is located inside sealed outer pipe.
4. a kind of C/Hratio pulsed neutron multi-parameter logger according to claim 3, it is characterised in that：The neutron tube
It is outer to wind some strata imide membranes.
5. a kind of C/Hratio pulsed neutron multi-parameter logger according to claim 3, it is characterised in that：Outside the sealing
Sulfur hexafluoride gas are filled with pipe.
6. a kind of C/Hratio pulsed neutron multi-parameter logger according to claim 3, it is characterised in that：The gamma is visited
Survey device and thermal-neutron detector shares a set of pre-amplification circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621021778.1U CN206035475U (en) | 2016-08-30 | 2016-08-30 | C/Hratio pulsed neutron multi -parameter logging instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621021778.1U CN206035475U (en) | 2016-08-30 | 2016-08-30 | C/Hratio pulsed neutron multi -parameter logging instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206035475U true CN206035475U (en) | 2017-03-22 |
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ID=58301807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621021778.1U Active CN206035475U (en) | 2016-08-30 | 2016-08-30 | C/Hratio pulsed neutron multi -parameter logging instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206035475U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333638A (en) * | 2018-04-18 | 2018-07-27 | 四川久天测控技术有限公司 | A kind of minor diameter C/Hratio saturation degree downhole instrument and logging instrument system |
| CN108825219A (en) * | 2018-05-25 | 2018-11-16 | 东华理工大学 | The uranium ore log calibration parameter of fusion naturalγ-rayenergyspectrum and neutron time spectrum seeks method |
-
2016
- 2016-08-30 CN CN201621021778.1U patent/CN206035475U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108333638A (en) * | 2018-04-18 | 2018-07-27 | 四川久天测控技术有限公司 | A kind of minor diameter C/Hratio saturation degree downhole instrument and logging instrument system |
| CN108825219A (en) * | 2018-05-25 | 2018-11-16 | 东华理工大学 | The uranium ore log calibration parameter of fusion naturalγ-rayenergyspectrum and neutron time spectrum seeks method |
| CN108825219B (en) * | 2018-05-25 | 2021-08-10 | 东华理工大学 | Uranium mine logging scale parameter solving method fusing natural gamma energy spectrum and neutron time spectrum |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |