CN106121628A - A kind of modified model 2228 litho-density tool with the source of exemption - Google Patents
A kind of modified model 2228 litho-density tool with the source of exemption Download PDFInfo
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- CN106121628A CN106121628A CN201610754737.1A CN201610754737A CN106121628A CN 106121628 A CN106121628 A CN 106121628A CN 201610754737 A CN201610754737 A CN 201610754737A CN 106121628 A CN106121628 A CN 106121628A
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- source
- exemption
- detector
- litho
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
- E21B47/017—Protecting measuring instruments
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Measurement Of Radiation (AREA)
Abstract
The invention discloses a kind of modified model 2228 litho-density tool with the source of exemption, including long spacing detector and short spaced detector, it is equipped with crystal and photomultiplier tube inside the sheath assembly of long and short spacing detector, being provided with spring between crystal and sheath assembly top, the sheath assembly of long spacing detector and the sheath assembly lateral surface of short spaced detector at next-door neighbour's crystal are respectively provided with exemption source.Monitor caesium source by increasing the exemption of 0.25 micromicrocurie to long spacing detector and short spaced detector, accomplish that instrument uses process to radioactive source uncontrolled, it is ensured that radiological hazard reduces to minimum, can accomplish long and short spacing detector working stability and technically reliable.
Description
Technical field
The present invention relates to petroleum exploration logging technical field, a kind of modified model 2228 lithology with the source of exemption is close
Degree logging instrument.
Background technology
2228 litho-density tools are one of radioactive series loggers, are widely used in petroleum works well logging
In.As it is shown in figure 1,2228 litho-density tools include long space, two detectors of short space, long and short spacing detector
Sheath assembly 2 is internal is equipped with crystal 3 and photomultiplier tube 4.According to technical device feature, for reaching automatic steady peak effect,
Long spacing detector sheath assembly 2 top (crystal 3 one end) is equipped with radioactivity 137 caesium source (the steady peak monitoring of 0.8-1.2 micromicrocurie
Source 6), short spaced detector is without monitoring source.Owing to monitoring source, steady peak 6 is contained in long spacing detector top, in order to ensure crystal with
Photomultiplier tube can coincide good and receive effective gamma ray, is provided with bullet between crystal 3 and sheath assembly top
Spring 5, makes have a certain distance between crystal 3 and steady monitoring source, peak 6, in order to ensure receiving intensity, and the radiation in monitoring source, steady peak 6
Intensity wants big.Owing to instrument self is with radioactivity 137 caesium source, in use by country's A class regulatory limits, in external labor
Business its safety of logging well is restricted, according to safety measure requirement, instrument keeping in repair, deposit, transportation of logging well all must be filled out
Writing radioactive source corresponding security protection list, it is loaded down with trivial details that it fills in process.Again owing to short space is without caesium source, its short space of temperature influence
Detector output amplitude is understood variation with temperature and is changed, and also have impact on instrument logging quality.Meanwhile, at maintenance device long space
During detector, by monitor 137 caesium sources from probe crystal front end lay down carry out Check and Maintenance after install again, and check and
When dismounting crystal and photomultiplier tube or when keeping in repair detector probe circuit, close contact is also wanted to monitor 137 caesium sources to the person
Health is under some influence.
Radioactivity 137 caesium source in existing 2228 litho-density tool detectors there is problems of can not be 137 caesiums
The energy of source radiation is reduced to minimum (controllable amounts), thus increases employee's safe formality of labor service outside, radiates human contact
There is certain potential safety hazard factor in property source, also has influence on the maintenance speed of instrument.
It is mainly manifested in following aspect:
1, instrument self has monitoring 137 caesium sources, and the well logging safety management of labor service outside is impacted.
2, indoor maintenance device, contact monitoring 137 caesium sources, human injury is had certain impact.
3, short space is without monitoring 137 caesium sources, is affected by well temperature, and detector output amplitude is unstable, and affects survey
Well quality.
Summary of the invention
The technical problem to be solved is to provide a kind of modified model 2228 litho-density log with the source of exemption
Instrument, it is to avoid many unfavorable factors that in the past detector caesium source was brought in use and potential safety hazard.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: a kind of modified model with the source of exemption
2228 litho-density tools, including long spacing detector and short spaced detector, in the sheath assembly of long and short spacing detector
Portion is equipped with crystal and photomultiplier tube, is provided with spring between crystal and sheath assembly top, at the long space of next-door neighbour's crystal
The sheath assembly of detector and the sheath assembly lateral surface of short spaced detector are respectively provided with exemption source.
Described exemption source is the exemption caesium source equipped with 0.25 micromicrocurie.
Described exemption source is that circular thin layer exempts source.
A diameter of 10.0mm in described exemption source, thickness is 0.2mm.
The invention has the beneficial effects as follows: by providing to 2228 litho-density tools utilizing exemption source, one is inspection-free to be looked into
Exemption monitoring radioactive source, long and short spacing detector can accurately receive exemption source radiation energy, accomplish long and short spacing
Double-channel stable peak performance is accurate, and technology application is reliable, uses process safety effective, can effectively guarantee to utilize the instrument exempting monitoring source
Its serviceability and the raising of safety index.Avoid many unfavorable factors and safety that conventional detector caesium source brings in use
Hidden danger.
Accompanying drawing explanation
Fig. 1 is the structural representation of 2228 litho-density tool long spacing detectors of prior art.
Fig. 2 is the present invention structural representation with the modified model 2228 litho-density tool long spacing detector in the source of exemption
Figure.
Fig. 3 for the present invention with exempt source modified model 2228 litho-density tool workflow diagram.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail:
Modified model 2228 litho-density tool with the source of exemption of the present invention, it is exempted source and detects with long and short spacing
Relevant art, operation principle between device are identical with prior art, are referred to prior art, so no longer describing, this
The bright difference with prior art is that the energy in the monitoring caesium source changing the 2228 long and short spacing detectors of litho-density tool is big
The little installation site with monitoring caesium source.
As in figure 2 it is shown, modified model 2228 litho-density tool with the source of exemption of the present invention, detect including long space
Device and short spaced detector, the sheath assembly 2 of long and short spacing detector is internal is equipped with crystal 3 and photomultiplier tube 4, crystal 3
And sheath assembly 2 is provided with spring 5 between top, the sheath assembly 2 of long spacing detector and short space at next-door neighbour's crystal 3 are visited
The sheath assembly lateral surface surveying device is respectively provided with exemption source 1.
Described exemption source 1 is the exemption caesium source equipped with 0.25 micromicrocurie.
Described exemption source 1 is that circular thin layer exempts source.
The a diameter of 10.0mm of diameter in described exemption source 1, thickness is 0.2mm.
The present invention is on the basis of traditional logging technique, by being respectively adopted to long spacing detector, short spaced detector
The exemption caesium source of 0.25 micromicrocurie, can monitor stability and the reliability of the work of long and short spacing detector.By to 2228 lithology
Densilog instrument provides a kind of inspection-free exemption radioactive source looked into, and its putting position is reasonable, and detector can accurately receive exemption
The energy of source radiation, accomplishes that two pass (long space and short space) steady peak performance is accurate, and technology application is reliable, uses process safety to have
Effect, can effectively guarantee that the raising of the safety index of monitoring source serviceability exempted by instrument.Conventional detector radioactive source is avoided to make
Many unfavorable factors that used time brings and potential safety hazard.
The most just do as a example by 2228 litho-density tools (with the long spacing detector in the source of exemption) overall work process
To introduce:
With the long spacing detector in the source of exemption, 2228 litho-density tools include that crystal, photomultiplier tube, sheath are total
Become, meanwhile, connect with the long spacing detector exempting monitoring source and amplify and place with long spacing detector circuit, long space signal
Reason circuit, long space pulse amplitude analysis circuit, analysis of spectrum circuit, control circuit, communicating circuit, communication interface (I/O) circuit,
High-tension circuits etc., with 2228 litho-density tool work process and the technical performance detection bag of the source of exemption long spacing detector
Include following steps (as shown in Figure 3):
1. first check for whether long spacing detector assembly (crystal, photomultiplier tube, sheath assembly) fastens；
2. observe whether exemption source is close to the center of detector assembly side, the namely circular shell center of aluminum
Place, now, the source of exemption can be that crystal provides gamma energy that can be certain；
3. after crystal receives gamma ray and is converted to photon, then voltage uprating step by step is carried out by photomultiplier tube
After, the negative spike signal of output；
4. Hyblid Buffer Amplifier is carried out through amplifier spike negative to long spacing detector (crystal and photomultiplier tube) output
And shaping pulse；
5. the pulse signal after shaping is supplied to pulse amplitude analysis plate (PHA), by signal amplitude is classified,
Then the counting of each energy in certain time is passed to panel, i.e. the analogue signal conversion to long spacing detector buffering
Become the digital quantity being directly proportional to pulse amplitude；
6. send spectralyzer to store this digital quantity signal, then deliver to I/O process after carrying out Manchester code coding,
Deliver to ground；
7. panel is controlled data input signal, and plane system just may know that driving signal by microcontroller in this wise
Size, the high pressure being added on photomultiplier tube are how many, the electric current of high pressure consumption, be added to the voltage of high voltage power supply, so that long
Spacing high voltage power supply is adjusted, forms pulse signal peak and measures.Ground system shows now stochastic gain, makes exemption monitor caesium
Source (137Cs) corresponds to steady peak energy on 225 ± 5 roads.
8. check that exempting steady peak, caesium source correspondence energy is on 225 ± 5 roads.
9. the long spacing detector steady peak process in band exemption source terminates.
10. if the steady peak energy in long spacing detector exemption caesium source is not on 225 ± 5 roads, can control according to ground order
Interface is automatically adjusted gain size, it is ensured that the steady peak energy of long spacing detector is on 225 ± 5 roads.
2228 litho-density tool work process and described above with exemption monitoring source short spaced detector are one
Cause, be no longer described.
The method of the present invention, advantage is when 2228 litho-density tools using exemption source, and its monitoring source is for exempting
Source, reaches to be reduced to exempt source radiation activity 0.25 micromicrocurie by 1 micromicrocurie to the radioactivity 137 caesium source radiation activity on former detector, adopts
Can use in any place with 2228 litho-density tools in the source of exemption, its safety ensures without filling in associated safety
Books etc., use process safety effective, it is to avoid many unfavorable factors that radioactive source brings when using and many potential safety hazard.
Detector exempts the reasonable placement of source position, it is ensured that detector can accurately receive the energy of exemption source radiation, accomplishes long and short
Spacing detector steady peak performance accurate, technically reliable.
In June, 2016, repair worker-house at logging instrument, to the 2228 litho-density tool overall technology performances utilizing exemption source
Detect.Being combined by 2228 litho-density tool+3514 simulation box+5721 ground systems, ground system shows long and short
The numerical value such as spacing detector running voltage, high pressure, gain, spectral peak road, line voltage distribution, pole plate electric current meet technology requirement, observation
Steady correspondence road, peak is all on 225 ± 5CH, and testing result shows that the 2228 litho-density tool technical performances using exemption source are good
Good, automatic spectrum stabilization can be reached by Gain tuning.
Table 1 uses the 2228 litho-density tool detection tables of data in exemption source
Table 2 uses the 2228 litho-density tool dual intensity spectrums in exemption source to process Data Detection table
| Detection parameter | LS measured value | Technical scope | |
| Long spacing detector energy road | cspk | 226.00 | 225±5CH |
| Long spacing detector high pressure | zgn | 1236.00 | 0.0-2000V |
| Long space gain | lsgnecho | 2411.00 | 0—4096 |
| Detection parameter | SS measured value | Technical scope | |
| Short spaced detector energy road | cspks | 223.00 | 225±5CH |
| Short spaced detector high pressure | zgns | 1232.00 | 0-2000V |
| Short space gain | ssgnecho | 2383.00 | 0—4096 |
According to above-mentioned work process and automatic spectrum stabilization processing step, strict operating process, shown by detection data result,
Using the 2228 litho-density tool detection data in exemption source accurately and reliably, long and short spacing detector technical performance is good, logical
Cross ground and automatically adjust gain, it is possible to reach spectral peak correspondence energy all on 225 ± 5CH, show the present invention with exemption source
Modified model 2228 litho-density tool, service behaviour is good, has good automatic spectrum stabilization effect.
In sum, present disclosure is not limited in the above embodiments, and the knowledgeable people in same area can
Can propose other embodiment within technological guidance's thought of the present invention easily, but this embodiment is included in this
Within the scope of bright.
Claims (4)
1., with modified model 2228 litho-density tool in the source of exemption, detect including long spacing detector and short space
Device, the sheath assembly (2) of long and short spacing detector is internal is equipped with crystal (3) and photomultiplier tube (4), crystal (3) and sheath
Spring (5) it is provided with, it is characterised in that at the sheath assembly of the long spacing detector of next-door neighbour's crystal (3) between assembly (2) top
And sheath assembly (2) lateral surface of short spaced detector is respectively provided with exemption source (1) (2).
Modified model 2228 litho-density tool with the source of exemption the most according to claim 1, it is characterised in that described
Exemption source (1) is the exemption caesium source equipped with 0.25 micromicrocurie.
Modified model 2228 litho-density tool with the source of exemption the most according to claim 1 and 2, it is characterised in that
Described exemption source (1) is that circular thin layer exempts source.
Modified model 2228 litho-density tool with the source of exemption the most according to claim 3, it is characterised in that described
A diameter of 10.0mm in exemption source (1), thickness is 0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610754737.1A CN106121628B (en) | 2016-08-29 | 2016-08-29 | 2228 lithologic density logging instrument with exemption source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610754737.1A CN106121628B (en) | 2016-08-29 | 2016-08-29 | 2228 lithologic density logging instrument with exemption source |
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| Publication Number | Publication Date |
|---|---|
| CN106121628A true CN106121628A (en) | 2016-11-16 |
| CN106121628B CN106121628B (en) | 2023-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119871A (en) * | 2018-10-31 | 2020-05-08 | 中石化石油工程技术服务有限公司 | Measuring device for measuring formation density value and measuring method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111119871A (en) * | 2018-10-31 | 2020-05-08 | 中石化石油工程技术服务有限公司 | Measuring device for measuring formation density value and measuring method thereof |
| CN111119871B (en) * | 2018-10-31 | 2023-12-26 | 中国石油化工集团有限公司 | Measuring device and measuring method for measuring stratum density value |
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| CN106121628B (en) | 2023-07-21 |
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Effective date of registration: 20200117 Address after: 100120 Beijing Xicheng District six laying Kang Applicant after: CHINA NATIONAL PETROLEUM Corp. Applicant after: CHINA PETROLEUM LOGGING Co.,Ltd. Address before: 300457 No. 106, Huang Hai Road, Tianjin Binhai New Area Development Zone, Bohai Drilling Engineering Co., Ltd. Applicant before: CNPC Bohai Drilling Engineering Co.,Ltd. |
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