CN206957689U - Logging instrument - Google Patents
Logging instrument Download PDFInfo
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- CN206957689U CN206957689U CN201720622987.XU CN201720622987U CN206957689U CN 206957689 U CN206957689 U CN 206957689U CN 201720622987 U CN201720622987 U CN 201720622987U CN 206957689 U CN206957689 U CN 206957689U
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- perforate
- logging instrument
- receiving
- hood
- gamma ray
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Abstract
This application provides a kind of logging instrument, including：The body of rod, two receiving transducers being arranged on the body of rod, between two receiving transducers between be separated with pre-determined distance, any one described receiving transducer includes：Receiving body, it is used to receive gamma ray signal；Hood for protecting rider, it is set in outside the receiving body, it is used to block gamma ray；Perforate, it is arranged on the hood for protecting rider and is correspondingly arranged with the receiving body, the perforate is used to penetrate for gamma ray, so that gamma ray imports the receiving body.The application embodiment provides a kind of logging instrument that can improve radioactive logging precision.
Description
Technical field
The application is related to oil field radioactive logging field, more particularly to a kind of logging instrument.
Background technology
Radioisotope log is to study and observe oil well technology shape by the use of artificial radioisotope as tracer
Condition and the dynamic logging method of oil-extracting and water-injecting.During construction, solution or solid that into well, injection is activated by radio isotope hang
Float, and be pressed into pipe outer tunnel or enter stratum or filter product on the stratum near perforation road, using survey during this
Well instrument is logged well.
The receiving transducer of gamma eye of the prior art is mainly using sodium iodide crystal, the main work(of crystal
Can receive the gamma ray of radio isotope release and gamma ray is converted into by electric signal by photoelectric effect.Existing skill
Receiving transducer includes support column and is arranged at the sodium iodide crystal of the support column end in art, and the sodium iodide crystal is along support column
Bearing of trend extension, so as to when receiving transducer is located at and logged well in oil well, the sodium iodide crystal can be received using it as ball
The gamma ray of radioactive substance release in the range of the spheric region of the heart.
What spherical active area can cause receiving transducer reception is the ray summation of all radioactive sources near probe, when
When fluid tracer flows through probe nearby, the radioactivity form for reception of popping one's head in is consistent, and simply amplitude is varied from, and can not be carved
Trace details.Simultaneously as except radio isotope can discharge gamma ray in well wellbore, it is some to be present in oil reservoir
Element such as uranium can also discharge gamma ray, will be because of connecing so as to the receiving transducer of gamma eye of the prior art
Receive the gamma ray that these elements being present in oil reservoir are discharged and produced interference signal, cause log to be largely
Smooth, to details underaction.Logging Software is not easy to identify when identifying and contrasting the curve of different probe measurements, so as to make
It is low into well logging resolution ratio.
Utility model content
The purpose of the application embodiment is to provide a kind of logging instrument that can improve radioactive logging precision.
To achieve the above object, this application provides following technical scheme.A kind of logging instrument, including：The body of rod, it is arranged on
Two receiving transducers on the body of rod, between two receiving transducers between be separated with pre-determined distance, any one described receives is visited
Head includes：Receiving body, it is used to receive gamma ray signal；Hood for protecting rider, it is set in outside the receiving body, it is used to block gamma
Ray；Perforate, it is arranged on the hood for protecting rider and is correspondingly arranged with the receiving body, the perforate is used to wear for gamma ray
Enter, so that gamma ray imports the receiving body.
As a preferred embodiment, the thickness of the hood for protecting rider is 1cm.
As a preferred embodiment, the material of the hood for protecting rider is lead.
As a preferred embodiment, the receiving body is oppositely arranged with the perforate.
As a preferred embodiment, the perforate is located at the medium position of the hood for protecting rider.
As a preferred embodiment, the perforate is circumferentially annularly set.
As a preferred embodiment, it is covered with lucite in the perforate.
As a preferred embodiment, the scope of the aperture widths is 1 centimetre to 2 centimetres.
As a preferred embodiment, the pre-determined distance is 30 centimetres, 50 centimetres or 80 centimetres.
As a preferred embodiment, the receiving body is sodium iodide crystal.
Technical scheme more than, when logging instrument, which is located at, is logged well in oil well, the receiving transducer on the logging instrument
The ray being generally aligned in the same plane with perforate is only received, remaining cover that is then blocked blocks, so as to add the details of log, and
The increase of details is beneficial to increase measurement accuracy, and radioactive logging precision can be improved so as to which the application embodiment provides one kind
Logging instrument.
Brief description of the drawings
Accompanying drawing described here is only used for task of explanation, and is not intended in any way to limit model disclosed in the present application
Enclose.In addition, shape and proportional sizes of each part in figure etc. are only schematical, the understanding to the application is used to help, and
It is not the specific shape and proportional sizes for limiting each part of the application.Those skilled in the art, can under teachings of the present application
To select various possible shapes and proportional sizes to implement the application as the case may be.In the accompanying drawings：
Fig. 1 is the structural representation of the logging instrument of the application embodiment；
Fig. 2 is the curve of output of upper receiving transducer in the prior art；
Fig. 3 is the curve of output for descending receiving transducer in the prior art；
Fig. 4 is the curve of output of receiving transducer in the application embodiment；
Fig. 5 is the curve of output of receiving transducer under the application embodiment；
Fig. 6 is the structural representation of the application embodiment receiving transducer.
Embodiment
Below in conjunction with the accompanying drawing in the application embodiment, the technical scheme in the application embodiment is carried out clear
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the application, rather than whole realities
Apply mode.Based on the embodiment in the application, those of ordinary skill in the art institute under the premise of creative work is not made
The every other embodiment obtained, belong to the scope of the application protection.
It should be noted that when an element is considered as " coupling " another element, it can be directly coupled to
Another element may be simultaneously present centering elements.
Unless otherwise defined, all of technologies and scientific terms used here by the article and the technical field of the application is belonged to
The implication that technical staff is generally understood that is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.
As shown in figure 1, for according to the better embodiment of the application first.Referring to Fig. 1, what present embodiment was provided
A kind of logging instrument, including：The body of rod 50, two receiving transducers being arranged on the body of rod 50, between two receiving transducers
Between be separated with pre-determined distance, any one described receiving transducer includes：Receiving body 13, it is used to receive gamma ray signal；Hood for protecting rider
11, it is set in outside the acceptor 13, it is used to block gamma ray signal；Receiving body 13, it is arranged at the hood for protecting rider 11
Interior, it can receive optical signal；Perforate 15, it is arranged on the hood for protecting rider 11, and the perforate 15 is used to penetrate for light.
In the present embodiment, the receiving transducer on the logging instrument only receives the ray being generally aligned in the same plane with perforate 15,
Remaining cover 11 that is then blocked blocks, so during well logging, the logging instrument described in the application embodiment is relative to of the prior art
Logging instrument can increase the details of log, and the increase of details is beneficial to increase measurement accuracy.
As shown in figure 1, in the present embodiment, the body of rod 50 can be lowered into oil well by external tool.The logging instrument
Receiving transducer is two, specifically, for upper receiving transducer 19 and lower receiving transducer 21.It is spaced between two receiving transducers predetermined
Distance.The selection of the pre-determined distance determines that flow is bigger, and pre-determined distance is longer according to different well logging scopes.Further,
The pre-determined distance is 30 centimetres, 50 centimetres or 80 centimetres.
As shown in Figure 1, Figure 2, Figure 3 shows, abscissa represents the time wherein in Fig. 2, Fig. 3, and ordinate represents the strong of gamma ray
Degree.When with radioactive isotope 17 on this receiving transducer 19 and during lower receiving transducer 21, upper receiving transducer 19 and under
Receiving transducer 21 can produce the curve of output 23 and 25 of different frequency with the difference of the intensity of gamma ray.Assuming that flowing through
When upper receiving transducer 19 and lower receiving transducer 21, the activity of tracer is without too big change, then upper receiving transducer 19
There should be good similitude on curve of output with lower receiving transducer 21, we approx think the output of two sensors
Curve is identical, and simply wherein signal delay regular hour, this time delay can be calculated with algorithm known all the way
Out, because the spacing of upper receiving transducer 19 and lower receiving transducer 21 is certain, so as to calculate the movement of tracer
Speed.Because the sectional area of fluid velocity profile is known, so as to calculate the flow of fluid.As shown in Figure 4, Figure 5, wherein
Abscissa represents the time, and ordinate represents the intensity of gamma ray.It can be seen that the curve of output described in the application embodiment
27th, 29 curves of output 23 more of the prior art, 25 details enhance.
Referring to Fig. 6, in the present embodiment, hood for protecting rider 11 is generally tubular, so as to the interior energy of hood for protecting rider 11 of the tubular
House receiving body 13.Receiving body 13 is arranged in hood for protecting rider 11, specifically, the volume of the hood for protecting rider 11 of the tubular, can be with
The volume of receiving body 13 is equal, so as to which hood for protecting rider 11 is wrapped on the outer wall of receiving body 13 or more than receiving body 13
Volume, so as to which the hood for protecting rider 11 can accommodate receiving body 13, as a preferred embodiment, the appearance of the hood for protecting rider 11 of the tubular
Product is equal with the volume of receiving body 13, so as to reduce the external diameter of receiving transducer.Certainly, the shape of the hood for protecting rider 11 is not limited to
This, can also be that other shapes are for example spherical, this application be not construed as limiting.
In the present embodiment, perforate 15 is set on hood for protecting rider 11, so as to which gamma ray can be entered by the perforate 15
In hood for protecting rider 11, received with the receiving body 13 being blocked in cover 11.Further, the scope of the aperture widths is 1 centimetre to 2 lis
Rice.
In the present embodiment, when the volume of hood for protecting rider 11 is more than the volume of receiving body 13, the receiving body 13 can be
It is oppositely arranged positioned at the both sides of perforate 15 or with perforate 15.When receiving body 13 is located at the both sides of perforate 15, gamma is penetrated
Line is entered in hood for protecting rider 11 by perforate 15, is then finally received again by reflecting, reflecting by receiving body 13；When receiving body 13
When being oppositely arranged with perforate 15, gamma ray can directly be received by perforate 15 by receiving body 13, without in hood for protecting rider
Receiving body 13 is entered back into through superrefraction, reflection in 11, so as to which detection of the receiving body 13 to gamma ray is effectively ensured.
In the present embodiment, perforate 15 is located at the medium position of receiving body 13, right so as to which receiving body 13 is effectively ensured
The detection of gamma ray.
In the present embodiment, perforate 15 is circumferentially annular in shape is set, smaller so as to avoid working as perforate 15, and isotope position
In the phase of perforate 15 back to side when, the gamma ray cover 11 that is blocked blocks, so as to which the gamma detected less than isotope release is penetrated
The situation of line.
In the present embodiment, lucite is covered with perforate 15, on the one hand can guarantee that gamma ray can pass through perforate
15, it on the other hand can prevent the debris of outside from entering from perforate 15 in hood for protecting rider 11, block receiving body 13, it is right to influence receiving body 13
The reception of gamma ray.
In a specific embodiment, in order to effectively shut out the light, the thickness of the hood for protecting rider 11 is thicker, occlusion effect
Better.Further, the thickness of the hood for protecting rider 11 is not less than 1 centimetre.But when 11 thickness increase of hood for protecting rider, accordingly, this connects
Receiving the external diameter of probe will increase；In view of the limitation of downhole instrument size, in order to increase the thickness of hood for protecting rider 11, the iodine of use
It is as far as possible small to change sodium crystal volume.
In the present embodiment, in order to effectively block the gamma ray of isotope release, and cost is reduced, hood for protecting rider 11
Material for lead, certainly, the material not limited to this of the hood for protecting rider 11, other materials, such as silver, gold are can also be, to this
The application is not construed as limiting, as long as the function of the application can be realized.
In the present embodiment, receiving body 13 is sodium iodide crystal, so as to which the receiving body 13 can receive isotope release
Gamma ray is simultaneously converted into electric signal by gamma ray by photoelectric effect.
It should be noted that in the description of the present application, term " first ", " second " etc. are only used for describing purpose and difference
Similar object, between the two and sequencing is not present, can not be interpreted as indicating or implying relative importance.In addition,
In the description of the present application, unless otherwise indicated, " multiple " are meant that two or more.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
State, many embodiments and many applications outside the example provided all will be aobvious and easy for a person skilled in the art
See.Therefore, the scope of this teaching should not determine with reference to foregoing description, but should with reference to preceding claims and this
The four corner of the equivalent that a little claims are possessed determines.It is for comprehensive purpose, all articles and special with reference to including
The disclosure of profit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as applicant the theme is not thought of as it is disclosed
Apply for a part for theme.
Claims (10)
- A kind of 1. logging instrument, it is characterised in that including：The body of rod, two receiving transducers being arranged on the body of rod, described in two Pre-determined distance is separated between receiving transducer,Any one described receiving transducer includes：Receiving body, it is used to receive gamma ray signal；Hood for protecting rider, it is set in outside the receiving body, it is used to block gamma ray；Perforate, it is arranged on the hood for protecting rider and is correspondingly arranged with the receiving body, the perforate is used to penetrate for gamma ray, So that gamma ray imports the receiving body.
- 2. logging instrument according to claim 1, it is characterised in that：The thickness of the hood for protecting rider is not less than 1cm.
- 3. logging instrument according to claim 1, it is characterised in that：The material of the hood for protecting rider is lead.
- 4. logging instrument according to claim 1, it is characterised in that：The receiving body is set with the perforate face.
- 5. logging instrument according to claim 1, it is characterised in that：The perforate is located at the medium position of the receiving body.
- 6. logging instrument according to claim 1, it is characterised in that：The perforate is circumferentially annularly set.
- 7. logging instrument according to claim 1, it is characterised in that：Lucite is covered with the perforate.
- 8. logging instrument according to claim 1, it is characterised in that：The scope of the aperture widths is 1 centimetre to 2 centimetres.
- 9. logging instrument according to claim 1, it is characterised in that：The pre-determined distance is 30 centimetres, 50 centimetres or 80 Centimetre.
- 10. logging instrument according to claim 1, it is characterised in that：The receiving body is sodium iodide crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720622987.XU CN206957689U (en) | 2017-05-31 | 2017-05-31 | Logging instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720622987.XU CN206957689U (en) | 2017-05-31 | 2017-05-31 | Logging instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206957689U true CN206957689U (en) | 2018-02-02 |
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ID=61379625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720622987.XU Active CN206957689U (en) | 2017-05-31 | 2017-05-31 | Logging instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714752A (en) * | 2018-06-26 | 2020-01-21 | 中国石油天然气股份有限公司 | Method and device for monitoring seepage channels of communicated well group |
-
2017
- 2017-05-31 CN CN201720622987.XU patent/CN206957689U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714752A (en) * | 2018-06-26 | 2020-01-21 | 中国石油天然气股份有限公司 | Method and device for monitoring seepage channels of communicated well group |
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