CN201057044Y - Sliding plate of lithology density logger with variable structure parameter - Google Patents
Sliding plate of lithology density logger with variable structure parameter Download PDFInfo
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- CN201057044Y CN201057044Y CNU2007201491307U CN200720149130U CN201057044Y CN 201057044 Y CN201057044 Y CN 201057044Y CN U2007201491307 U CNU2007201491307 U CN U2007201491307U CN 200720149130 U CN200720149130 U CN 200720149130U CN 201057044 Y CN201057044 Y CN 201057044Y
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Abstract
The utility model relates to a litho-density logging tool slide plate with a varistructure parameter. The utility model is applied in a petroleum explored and developed nuclear logging instrument-a litho-density logging tool, a sleeve density logging tool and a measuring device used for a related method, an experiment and a study. The utility model is characterized in that a group of masking piece is arranged between a source room and a slide plate main body. Two ray access holes are arranged on the side wall of the slide plate main body, and the ray access holes are arranged on the outer side of a detector. The ray access hole at the lower part is provided with a lower collimated hole masking body sealing cap, an inclined through hole is arranged on a lower collimated hole masking body; the ray access hole at the upper part is provided with an upper collimated hole masking body sealing cap, and a direct through hole is arranged on an upper collimated hole masking body. The through hole is filled with light density material, such as epoxy resin. A fixed cover plate is arranged on the collimated hole masking body and on the outer side. The fixed cover plate fixes the lower collimated hole masking body and the upper collimated hole masking body on the slide plate main body. The utility model has the effect that the source-detector separation is adjusted through changing the thickness of the masking piece, and the utility model is suitable for the measurement of different stratums through changing the collimated hole.
Description
Technical field
The utility model relates to the petroleum well logging technology field, and particularly a kind of litho-density tool that adopts radioactive logging specifically is a kind of slide plate of litho-density tool.
Background technology
Along with the development of petroleum exploration and development, petroleum reservoir geological conditions complexity requires well-log information can reflect the stratum geological condition realistically, thereby also more and more higher to the requirement of logging technique.The data that radioactivity logging device records can satisfy the requirement of litho-density log substantially.But also there is the limitation problem in radioactivity logging device.Radioactivity logging device has different spacings, and the investigation depth on its corresponding stratum is different.After spacing is fixing, the stratum of corresponding certain density, its investigation depth is also just fixing.The instrument of certain spacing, corresponding certain investigation depth, also just corresponding certain simultaneously longitudinal frame.The radioactivity logging device of the spacing structure that has been fixed not is in all formation testings, all can obtain optimum efficiency.For example, measure, wish to obtain The better resolution, will select the little logging instrument of spacing for thin layer; With respect to thick-layer or low-density stratum (as the coal seam), can increase spacing and obtain bigger investigation depth; For the influence of needs elimination mud cake, adopt the length spacing compensated measurement mode of radioactivity logging device, different spacings, different short space collimating aperture structures, the effect difference of compensation.Under a kind of like this background, the slide plate of design varistructure parameter to adapt to the measurement needs of Different Strata, has more practical significance.
The development of radioactivity logging device is adopted theoretical and two kinds of methods of experiment.Because the radioactive logging instrument, what measuring process write down is random signal, compares with electrical method, acoustic logging method, can't use accurately analogue measurement of theoretical method fully at present.(mainly taking the computational methods of statistical sampling).Thereby also need many relatively experiments to study.Along with computer technology is used the Monte Carlo method for numerical simulation application of studying with nuclear logging, research has very big promotion to the radioactive logging instrument in recent years.But the theoretical means that need actual verification of calculating adopt the actual instrumentation checking.In addition, in the well logging process,, there is the influence of well and mud for the bore hole borehole measurement; In cased well, log well, have the influence of sleeve pipe and cement sheath.In order to overcome the influence of these unfavorable factors in the well logging process, need to adopt the probe of different spacings and different direction of collimation, survey information from the different depth stratum, by the combination of a large amount of metrical informations, eliminate the influence of above-mentioned unfavorable factor.
In addition, the structural parameters of radioactive logging instrument are all fixed, if want logging method is improved, just need the new instrument of development, present theoretical calculation method, can't make accurate calculating to radioactive logging instrument structure, need a kind of experimental prototype of flexible transformation parameter, the checking key parameter.
Summary of the invention
The purpose of this utility model provides a kind of litho-density tool slide plate of varistructure parameter, adopts the structure and parameter that changes slide plate, makes radioactivity logging device can adapt to Different Strata, improves logging effect; Be the theoretical apparatus structure design of determining of calculating simultaneously, a kind of effective means of experimental verification is provided.Overcome radioactivity logging device when carrying out the logging method test, can not adapt to the deficiency of multiple formation condition.
According to theory analysis, the principal element that influences radioactive nucleus logger well logging result has: the perforation hole shape of spacing, probe shield opening structure and radioactive source.So the utility model is taked following technical scheme: the litho-density tool slide plate of varistructure parameter, comprise radioactive source, chamber, source, slide plate main body and probe, the source is indoor radioactive source.The slide plate main body is cylindric, is fixed with down probe and last probe in the slide plate main body.It is characterized in that a set of shield sheet is arranged between chamber, source and slide plate main body.Have 2 rays to enter the hole in the slide plate main body wall, the bottom ray enters the outside of hole at following probe; The top ray enters the outside of hole at last probe.The bottom ray enters the hole collimation body shield capping down, and oblique through hole is arranged on the following collimation body shield; The top ray enters the hole to be had and goes up the capping of collimation body shield, on collimate on the body shield clear opening arranged.Under collimate the body shield and on the collimation body shield outside securing cover plate is arranged.Securing cover plate will collimate the body shield down and last collimation body shield is fixed on the slide plate main body.
The shielding sheet, collimate body shield and go up collimation body shield and adopt tungsten nickel to make down.
Described its thickness of shielding sheet is between the 5-40 millimeter.By changing the thickness of a plurality of shielding sheets, reach the distance of adjusting between radioactive source and following probe and the last probe.The spacing of realizing long and short probe changes.
Inclined hole on the described body of the collimation down shield is a through hole, and the center line angle of the center line in hole and following probe is between 30-90 °.The diameter in hole is between the 5-20 millimeter.
The described inclined hole of going up on the collimation body shield is a through hole, and the diameter in hole is between the 30-80 millimeter.
Fixed form between shielding sheet and the slide plate main body is a bolt.
Securing cover plate is fixed on the slide plate main body, by screw.
Chamber, source and slide plate main body are a kind of separable structures, and the combination of the shielding sheet of different-thickness is connected on the slide plate main body by set bolt, change spacing, as long as the combination of conversion different-thickness shielding sheet, the bolt of selecting length with it to be complementary is just passable.
Under to collimate body shield and last collimation body shield and slide plate main body be isolating construction, be fixed on the slide plate main body by securing cover plate, change shield as long as dismantles securing cover plate earlier, change shield after, with screw securing cover plate is fixed on the slide plate main body.
The beneficial effects of the utility model are: the litho-density tool slide plate of varistructure parameter, adopt varistructured slide plate design, and its spacing, the shield structure of length spacing all can change flexibly.At different oil field geologic features, select different spacings and collimating aperture shield for use, can reach the optimum measurement effect.As measurement, can select long spacing logging instrument slide plate at low-density area or coal seam.In addition, can realize that length spacing, probe collimate the variation combination of empty angle and a plurality of parameters of the empty angle of source outgoing.Use this slide plate,, carry out accommodation, make stratum measurement obtain optimum efficiency at multiple down-hole influence factor.The utility model slide plate provides effective verification tool for proof theory calculates.The isotope radioactive source that uses in this slide plate experiments of measuring is lower than the source strength that actual well logging is used, and can reduce the injury of experimentation to human body.
Description of drawings
Fig. 1 is the litho-density tool skateboard generalized section of varistructure parameter.
Among the figure, 1. radioactive source, 2. chamber, source, 3. the shielding sheet 4. descends the collimating aperture shield, 5. descends probe, 6. securing cover plate, 7. the slide plate main body 8. goes up probe, 9. goes up the collimating aperture shield, 10. screw, 11. bolts.
The specific embodiment
Embodiment 1: consult Fig. 1.The litho-density tool slide plate of the utility model varistructure parameter has radioactive source 1 in the chamber, source 2.Slide plate main body 7 is cylindric, and external diameter is 80 millimeters, and length is 1050 millimeters.Be fixed with short spaced detector 5 and long spacing detector 8 in the slide plate main body 7.It is 6 shielding sheet 3 that one group of quantity is arranged between chamber, source 2 and slide plate main body 7.The thickness difference of shielding sheet 3 adopts tungsten nickel to make.Shielding sheet 3 thickness from bottom to top is respectively 5 millimeters, 10 millimeters, 10 millimeters, 15 millimeters, 20 millimeters and 40 millimeters.Fixed form between shielding sheet 3 and the slide plate main body 7 is that bolt 11 is fixing.When need changing down probe 5 and last probe 8 spacings, can be according to determined spacing, increase the quantity of shielding sheet 3 or and different-thickness is shielded sheet 3 combine.Select for use the bolt 11 of respective length fixing again, just can realize the adjusting of spacing.The spacing of following probe 5 can be in the range of 50-160 millimeter; The spacing of last probe 8 can be in 250-400 millimeter range.Have 2 rays to enter the hole at slide plate main body 7 sidewalls, the bottom ray enters the outside of hole at following probe 5; The top ray enters the outside of hole at last probe 8.The bottom ray enters the hole collimation body shield 4 cappings down, and oblique through hole is arranged on the following collimation body shield 4, and the center line in hole is 30 ° with the center line angle of following probe 5, and the diameter in hole is 10 millimeters.Under collimate body shield 4 and last collimation body shield 9 and adopt tungsten nickels to make.Under collimate body shield 4 and on collimation body shield 9 outsides securing cover plate 6 is arranged.Securing cover plate 6 will collimate body shield 4 down and last collimation body shield 9 is fixed on the slide plate main body 7, adopts screw 10 fixing.If change the through hole that collimates body shield 4 and last collimation body shield 9 down, unload screw 10 and securing cover plate 6, change the following collimation body shield 4 and the last collimation body shield 9 of different-diameter through hole, adopt screw 10 that securing cover plate 6 is fixing then.
Claims (6)
1. the litho-density tool slide plate of a varistructure parameter, comprise radioactive source (1), chamber, source (2), slide plate main body (7) and probe (5,8), radioactive source (1) is arranged in the chamber, source (2), slide plate main body (7) is cylindric, be fixed with down probe (5) and last probe (8) in the slide plate main body (7), it is characterized in that: a set of shield sheet (3) is arranged between chamber, source (2) and slide plate main body (7), have 2 rays to enter the hole at slide plate main body (7) sidewall, the bottom ray enters the outside of hole at following probe (5); The top ray enters the outside of hole in last probe (8), and the bottom ray enters the hole collimation body shield (4) capping down, and oblique through hole is arranged on the following collimation body shield (4); The top ray enters the hole the capping of the collimation of going up body shield (9), on the last collimation body shield (9) clear opening is arranged, under collimate body shield (4) and last collimation body shield (9) outside securing cover plate (6) arranged, securing cover plate (6) will collimate body shield (4) down and last collimation body shield (9) is fixed on the slide plate main body (7).
2. the litho-density tool slide plate of varistructure parameter according to claim 1 is characterized in that: the shielding sheet (3), down collimate body shield (4) and last collimation body shield (9) employing tungsten nickel make.
3. the litho-density tool slide plate of varistructure parameter according to claim 1 is characterized in that: its thickness of described shielding sheet (3) is between the 5-40 millimeter.
4. according to the litho-density tool slide plate of claim 1 or 2 or 3 described varistructure parameters, it is characterized in that: the inclined hole on the described collimation body shield (4) down is a through hole, the center line angle of the center line in hole and following probe (5) is between 30-90 °, and the diameter in hole is between the 5-20 millimeter.
5. according to the litho-density tool slide plate of claim 1 or 2 or 3 described varistructure parameters, it is characterized in that: the described inclined hole of going up on the collimation body shield (9) is a through hole, and the diameter in hole is between the 30-80 millimeter.
6. according to the litho-density tool slide plate of claim 1 or 2 or 3 described varistructure parameters, it is characterized in that: the fixed form between shielding sheet (3) and the slide plate main body (7) is a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201491307U CN201057044Y (en) | 2007-05-15 | 2007-05-15 | Sliding plate of lithology density logger with variable structure parameter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201491307U CN201057044Y (en) | 2007-05-15 | 2007-05-15 | Sliding plate of lithology density logger with variable structure parameter |
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| Publication Number | Publication Date |
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| CN201057044Y true CN201057044Y (en) | 2008-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2007201491307U Expired - Lifetime CN201057044Y (en) | 2007-05-15 | 2007-05-15 | Sliding plate of lithology density logger with variable structure parameter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011582A (en) * | 2010-11-25 | 2011-04-13 | 中国石油化工股份有限公司 | Apparatus for testing rock drillability under stratum condition |
| CN102042005A (en) * | 2009-10-12 | 2011-05-04 | 西安威尔罗根能源科技有限公司 | Lithologic density probe fastening screw |
| CN102953689A (en) * | 2011-08-30 | 2013-03-06 | 中国石油化工股份有限公司 | Radioactive source bin and drill collar with same |
| CN109444972A (en) * | 2018-09-19 | 2019-03-08 | 中国石油大学(华东) | A kind of dual-energy x-ray measurement formation density log device and method |
-
2007
- 2007-05-15 CN CNU2007201491307U patent/CN201057044Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042005A (en) * | 2009-10-12 | 2011-05-04 | 西安威尔罗根能源科技有限公司 | Lithologic density probe fastening screw |
| CN102011582A (en) * | 2010-11-25 | 2011-04-13 | 中国石油化工股份有限公司 | Apparatus for testing rock drillability under stratum condition |
| CN102011582B (en) * | 2010-11-25 | 2013-05-08 | 中国石油化工股份有限公司 | Apparatus for testing rock drillability under stratum condition |
| CN102953689A (en) * | 2011-08-30 | 2013-03-06 | 中国石油化工股份有限公司 | Radioactive source bin and drill collar with same |
| CN102953689B (en) * | 2011-08-30 | 2014-12-10 | 中国石油化工股份有限公司 | Radioactive source bin and drill collar with same |
| CN109444972A (en) * | 2018-09-19 | 2019-03-08 | 中国石油大学(华东) | A kind of dual-energy x-ray measurement formation density log device and method |
| CN109444972B (en) * | 2018-09-19 | 2020-07-03 | 中国石油大学(华东) | Logging device and method for measuring formation density by dual-energy X-ray |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080507 |