CN2900786Y - Deuterium-deuterium controlable compensation neutron well logging instrument while drilling - Google Patents
Deuterium-deuterium controlable compensation neutron well logging instrument while drilling Download PDFInfo
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- CN2900786Y CN2900786Y CN 200620115987 CN200620115987U CN2900786Y CN 2900786 Y CN2900786 Y CN 2900786Y CN 200620115987 CN200620115987 CN 200620115987 CN 200620115987 U CN200620115987 U CN 200620115987U CN 2900786 Y CN2900786 Y CN 2900786Y
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- neutron
- deuterium
- generator
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- detector
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Abstract
The utility model provides a compensated neutron log while drilling for real-time measurement of the formation pore degree around the borehole. The drill collar is opened a U groove at the side and is provided from up to down two compression members of a reception module and a generation module. Two installing frameworks are respectively fixed on the two compression members. In the reception installing framework from up to down, a signal processing circuit module, a far neutronic detector, a far detector barrier, a proximity neutronic detector, and a proximity detector barrier are orderly equipped. In the generation installing framework from up to down, a generation controlling circuit, a heat abstractor, and a neutronic generator are equipped. With the D-D accelerator, the utility model has the advantage of reducing the radiation to people and the environment, the longer durability and higher sensibility. And the utility model is suitable for the geological guiding drilling.
Description
Technical field:
The utility model relates to a kind of wireless drilling measurer that is used for geosteering in the oil drilling industry.Specifically, the utility model relate to deuterium-deuterium alpha reaction accelerator neutron generator with boring compensated neutron porosity logging instrument.
Background technology:
In the petroleum industry geologic steering drilling, be used at drilling process with boring compensation neutron logger, real-time measuring well is the degree of porosity of exclosure layer near the eyes, thereby differentiates oil-gas Layer, calculates the oil productive capacity on stratum.Present known well logging during compensation neutron logger is used a neutron source, and putting two neutron detectors from neutron source different distance place, measure the ratio of two Detector count rate, because this ratio mainly reflects the hydrogen content on stratum, and hydrogen is contained in the fluid on stratum usually, so hydrogen content is relevant with formation porosity, calculate formation porosity thus.In the present known well logging during compensation neutron logger, neutron source adopts americium-beryllium neutron source or D-T accelerator neutron generator, does not adopt deuterium-deuterium alpha reaction accelerator neutron generator.
Use the compensated neutron porosity logging instrument of americium-beryllium neutron source to have following shortcoming:
Because the high energy particle that americium-beryllium neutron source utilizes the nuclear decay of radio isotope americium to emit removes to bombard target material beryllium nuclear, realize the nuclear reaction of given-ioff neutron, even can not produce strong radioactivity when therefore it does not move yet, though adopt multiple radioactive source screen protective device and measure, but the execute-in-place environmental limitations use of effective preventive means, usually be free-hand operation, be difficult to avoid operating personnel are caused health hazards.In addition, the as easy as rolling off a log radioactive sources lost that makes of well logging during complicated operations condition, and also the recovery of radioactive source is relatively more difficult, if in use, can't salvage because of the down-hole equipment bit freezing makes radioactive source fall into well, then radioactive source is understood the severe contamination stratum, even whole oil district is scrapped.
Use the compensated neutron porosity logging instrument of D-T accelerator neutron generator to have following shortcoming:
At first, the life-span of D-T accelerator neutron generator is shorter.The D-T accelerator neutron generator makes the charged particle deuteron accelerate to higher-energy by accelerator, and the triton of bombardment target material is realized the nuclear reaction of given-ioff neutron.Because contain more unstable radioactive nucleic tritium in its target, its natural decay product is an inert gas helium, the helium concentration in target that is produced along with the tritium decay increases can make D-T accelerator neutron generator air pressure inside increase.In addition, during work because the ion sputtering of the hot-spot of target, target surface and foreign ion cause easily that to the dilution of tritium concentration in the target neutron yield descends.And the target material of deuterium-deuterium alpha reaction accelerator neutron generator is a deuteron, does not then have this problem.
Secondly, according to compensated neutron porosity measurement principle, measurement sensitivity is relevant with the energy of employed neutron source, and the energy of neutron source is high more, and the degree of porosity sensitivity of apparatus measures is low more.The average energy of americium-beryllium neutron source is about 4～5MeV, and deuterium-deuterium alpha reaction accelerator neutron generator output energy is the fast neutron of 2.3MeV, and D-T accelerator neutron generator output energy is the fast neutron of 14MeV.Therefore, adopt the compensated neutron degree of porosity sensitivity of deuterium-deuterium alpha reaction accelerator neutron generator the highest, americium-beryllium neutron source the person take second place, and the D-T accelerator neutron generator is then the poorest.
In addition, though the D-T accelerator neutron generator can not produce strong radioactivity when not moving, but contain a large amount of unstable radioactive nucleic tritiums in its target, when it in the down-hole during because of unexpected the damage, can produce and the same radioactivity problem of americium-beryllium neutron source, cause the severe contamination on stratum.And the target material deuteron of deuterium-deuterium alpha reaction accelerator neutron generator is comparatively stable, does not have this problem.
The utility model content:
The purpose of this utility model is in order to provide a kind of with boring compensation neutron logger, be used at the real-time measuring well degree of porosity of exclosure layer near the eyes of drilling process, compared with prior art, overcome and used americium-beryllium neutron source, and the D-T accelerator neutron generator life-span is low and the problem of poor sensitivity the radiological hazard that human and environment brought.
Instrument described in the utility model comprises: drill collar, wire guide, the mud flow-guiding channel, the high pressure sealing cover plate, U-lag, fixed connector, receiver is installed skeleton, control processing circuit, neutron detector far away, the far detector shielding slab, nearly neutron detector, nearly probe shielding slab, receiver module resistance to compression tube, coupled connector, generator module resistance to compression tube, generator is installed skeleton, middle sub-controller, heat abstractor, accelerator for neutron production, sliding ring connector, nearly neutron signal processor, neutron signal processor far away, high voltage source, power-supply controller of electric, the ion gun controller, microprocessor, memory, modem, the bus driver for isolating.
Feature of the present utility model is: comprise a mud flow-guiding channel in the drill collar at least, have a U-lag in the drill collar side, receiver module resistance to compression tube and generator module resistance to compression tube are installed in U-lag from top to bottom, receiver is housed respectively in receiver module resistance to compression tube and the generator module resistance to compression tube skeleton and generator installation skeleton are installed, receiver is installed in the skeleton control processing circuit is installed from top to bottom, neutron detector far away, the far detector shielding slab, nearly neutron detector and nearly probe shielding slab, sub-controller during generator is installed and installed from top to bottom in the skeleton, heat abstractor and accelerator for neutron production, accelerator for neutron production is deuterium-deuterium alpha reaction accelerator neutron generator, receiver is installed by the skeleton upper end and generator installation skeleton lower end is connected with fixed connector respectively, fixed connector is fixed on the drill collar outer wall by the high pressure sealing cover plate, between receiver module resistance to compression tube and the generator module resistance to compression tube coupled connector is installed, coupled connector is fixed on the drill collar outer wall, control processing circuit comprises microprocessor and ion gun controller, middle sub-controller and ion gun controller and microprocessor, accelerator for neutron production connects.
Described in the utility modelly be with boring the beneficial effect that deuterium-the deuterium compensation neutron logger has, drill collar formula mounting structure with anti-vibration, anti-high-handed measures adapts to the abominable working environment in down-hole, adopt deuterium-deuterium alpha reaction accelerator neutron generator, reduced the radiological hazard that human and environment is brought, and have higher application life and sensitivity, be applicable to geologic steering drilling.
Below in conjunction with drawings and Examples the utility model is further specified.
Description of drawings:
Fig. 1 represents the axial section of " with boring deuterium-deuterium compensation neutron logger ";
Fig. 2 represents the radial section figure of " with boring deuterium-deuterium compensation neutron logger ";
Fig. 3 represents the signal processing flow block diagram of " with boring deuterium-deuterium compensation neutron logger ".
1, drill collar 2, wire guide 3, mud flow-guiding channel
4, high pressure sealing cover plate 5, U-lag 6, fixed connector
7, receiver is installed skeleton 8, control processing circuit 9, neutron detector far away
10, far detector shielding slab 11, nearly neutron detector 12, nearly probe shielding slab
13, receiver module resistance to compression tube 14, coupled connector 15, generator module resistance to compression tube
16, generator is installed skeleton 17, middle sub-controller 18, heat abstractor
19, accelerator for neutron production 20, sliding ring connector 21, nearly neutron signal processor
22, neutron signal processor 23 far away, high voltage source 24, power-supply controller of electric
25, ion gun controller 26, microprocessor 27, memory
28, modem 29, bus driver for isolating
The specific embodiment:
Now, the utility model is further described in conjunction with Figure of description 1,2 and 3.
Fig. 1 represents the axial section of instrument.For adapting to the abominable working environment in down-hole, instrument adopts drill collar formula mounting structure, and anti-vibration, anti-high-handed measures are arranged.Drill collar 1 is usually located at after drill bit or the deflecting tool as the installation skeleton of instrument and the part of down-hole equipment.The drill collar side has a U-lag 5, receiver module resistance to compression tube 13 and generator module resistance to compression tube 15 are installed in U-lag 5 from top to bottom, their wall thickness should satisfy the requirement of anti-down-hole slurry high pressure, columnar receiver is housed respectively in receiver module resistance to compression tube 13 and the generator module resistance to compression tube 15 skeleton 7 and generator installation skeleton 16 are installed.
Receiver is installed control processing circuit 8, neutron detector 9 far away, far detector shielding slab 10, nearly neutron detector 11 and nearly probe shielding slab 12 is installed in the skeleton 7 from top to bottom, internal voids fills up with glue, and receiver is installed skeleton 7 and is contained in the receiver module resistance to compression tube 13.Nearly neutron detector 11 and neutron detector far away 9 adopt helium-3 pipe, and the signal of its output calculates formation porosity information after handling through control processing circuit 8.Nearly probe shielding slab 12 and far detector shielding slab 10 are by containing boron material and the tungsten ferronickel is made, be installed in nearly neutron detector 11 and neutron detector 9 lower ends far away respectively, be used to shield the neutron that neutron source is directly incident on probe, make the variation sensitivity of probe formation porosity.
Receiver is installed by skeleton 7 upper ends and generator installation skeleton 16 lower ends are connected with fixed connector 6 respectively, high pressure sealing cover plate 4 is pressed in fixed connector 6 outsides, and be fixed on drill collar 1 outer wall, prevent that high-pressure slurry from entering fixed connector 6, causes instrument damage.
According to the compensated neutron measuring method, should keep suitable distance between neutron source and two neutron detectors, in the utility model, be installed with the coupled connector 14 of certain-length between receiver module resistance to compression tube 13 and generator module resistance to compression tube 15, another effect of coupled connector 14 is being electrically connected between generator part and the receiver part.
Screw thread root at drill collar 1 is inlaid with sliding ring connector 22, and has wire guide 2 to lead to U-lag 5, and wire guide 2 and sliding ring connector 22 are used for power supply and signal transmission.
Fig. 2 represents the radial section figure of instrument.Drill collar 1 comprises a mud flow-guiding channel 3 at least, and the water conservancy diversion drilling fluid is from ground to the drill bit.Mud flow-guiding channel 3 is a sprue in the upper and lower of drill collar 1, this runner center and drill collar 1 axial centre be not in same position, be divided into the less runner of two or more diameters in U-lag 5 positions, with the requirement of strength that satisfies apparatus structure and drilling engineering required the mud displacement requirement.As another kind of runner form, mud flow-guiding channel 3 also can only include a sprue in drill collar 1.
Fig. 3 represents the signal processing flow block diagram of instrument.Control processing circuit 8 comprises: nearly neutron signal processor 21, neutron signal processor 22 far away, high voltage source 23, power-supply controller of electric 24, ion gun controller 25, microprocessor 26, memory 27, modem 28 and bus driver for isolating 29.
Instrument is gone into the well before by the computer software setting, produce different control command sequential by the ground slush pump after perhaps instrument is gone into the well, enter specific mode of operation by instrumentation program under microprocessor 26 control wells, produce specific control sequential, sub-controller 17 in the supply, and the duty of switch control accelerator for neutron production 19 is measured if need, then make accelerator for neutron production 19 produce neutron, otherwise stop to produce neutron.In addition, in the instrument course of work, microprocessor 26 calculates thermal neutron flux according to the count value of nearly neutron detector 11 or neutron detector far away 9 output pulses, feed back to ion gun controller 25, the ion gun electric current of control accelerator for neutron production 19, realize the self adaptation regulation and control of neutron yield, make uncertainty of measurement reach requirement.
The duty of high voltage source 23 is controlled through power-supply controller of electric 24 by microprocessor 26, nearly neutron detector 11 of the high voltage supply of its output and neutron detector 9 far away.Nearly neutron detector 11 and neutron detector 9 far away change into the signal of telecommunication with the stratum neutron that receives, pass through nearly neutron signal processor 21 and neutron signal processor 22 far away respectively, deliver to microprocessor 26 after becoming the calibration pulse signal, paired pulses is counted, calculate the degree of porosity on stratum according to count value, and result of calculation is saved in the memory 27 by the data record format that designs, simultaneously according to the transmission needs, after the compression of calculated data coding, be modulated into the signal of specific format by modem 28, and after bus driver for isolating 29 drives, deliver to the MWD instrument by single core bus, control its mud-pressure-pulse telemetry system by MWD and send to ground together.
Claims (4)
1, a kind of with boring deuterium-deuterium controllable compensating neutron logging instrument, comprise: drill collar (1), mud flow-guiding channel (3), U-lag (5), receiver is installed skeleton (7), control processing circuit (8), neutron detector (9) far away, far detector shielding slab (10), nearly neutron detector (11), nearly probe shielding slab (12), receiver module resistance to compression tube (13), generator module resistance to compression tube (15), generator is installed skeleton (16), middle sub-controller (17), heat abstractor (18), accelerator for neutron production (19), it is characterized in that: comprise a mud flow-guiding channel (3) in the drill collar (1) at least, have a U-lag (5) in drill collar (1) side, receiver module resistance to compression tube (13) and generator module resistance to compression tube (15) are installed in U-lag (5) from top to bottom, receiver is housed respectively in receiver module resistance to compression tube (13) and the generator module resistance to compression tube (15) skeleton (7) and generator installation skeleton (16) are installed, receiver is installed in the skeleton (7) control processing circuit (8) is installed from top to bottom, neutron detector (9) far away, far detector shielding slab (10), sub-controller (17) during nearly neutron detector (11) and nearly probe shielding slab (12), generator are installed and installed from top to bottom in the skeleton (16), heat abstractor (18) and accelerator for neutron production (19).
2, according to claim 1 with boring deuterium-deuterium controllable compensating neutron logging instrument, it is characterized in that accelerator for neutron production (19) is deuterium-deuterium alpha reaction accelerator neutron generator.
3, according to claim 1 with boring deuterium-deuterium controllable compensating neutron logging instrument, it is characterized in that: receiver is installed by skeleton (7) upper end and generator installation skeleton (16) lower end is connected with fixed connector (6) respectively, fixed connector (6) is fixed on drill collar (1) outer wall by high pressure sealing cover plate (4), between receiver module resistance to compression tube (13) and the generator module resistance to compression tube (15) coupled connector (14) is installed, coupled connector (14) is fixed on drill collar (1) outer wall.
4, according to claim 1 with boring deuterium-deuterium controllable compensating neutron logging instrument, it is characterized in that: control processing circuit (8) comprises ion gun controller (25) and microprocessor (26), and middle sub-controller (17), ion gun controller (25) all are connected with microprocessor (26), accelerator for neutron production (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620115987 CN2900786Y (en) | 2006-05-24 | 2006-05-24 | Deuterium-deuterium controlable compensation neutron well logging instrument while drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620115987 CN2900786Y (en) | 2006-05-24 | 2006-05-24 | Deuterium-deuterium controlable compensation neutron well logging instrument while drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2900786Y true CN2900786Y (en) | 2007-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620115987 Expired - Lifetime CN2900786Y (en) | 2006-05-24 | 2006-05-24 | Deuterium-deuterium controlable compensation neutron well logging instrument while drilling |
Country Status (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101418685A (en) * | 2007-10-26 | 2009-04-29 | 普拉德研究及开发股份有限公司 | Neutron logging tool having source and target with deuterium-tritium gas admixture |
| CN100497885C (en) * | 2006-05-24 | 2009-06-10 | 中国石化集团胜利石油管理局钻井工艺研究院 | Deuterium-deuterium controllable compensating neutron well logging instrument during drilling |
| CN103527181A (en) * | 2012-07-05 | 2014-01-22 | 中国石油天然气集团公司 | Method and instrument for controllable source neutron logging during drilling |
| CN104500052A (en) * | 2014-11-27 | 2015-04-08 | 中国石油天然气集团公司 | Compensation density logging-while-drilling instrument |
| CN110056341A (en) * | 2018-01-18 | 2019-07-26 | 中石化石油工程技术服务有限公司 | One kind is with brill controllable source density logging device |
-
2006
- 2006-05-24 CN CN 200620115987 patent/CN2900786Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100497885C (en) * | 2006-05-24 | 2009-06-10 | 中国石化集团胜利石油管理局钻井工艺研究院 | Deuterium-deuterium controllable compensating neutron well logging instrument during drilling |
| CN101418685A (en) * | 2007-10-26 | 2009-04-29 | 普拉德研究及开发股份有限公司 | Neutron logging tool having source and target with deuterium-tritium gas admixture |
| CN101418685B (en) * | 2007-10-26 | 2013-12-04 | 普拉德研究及开发股份有限公司 | Neutron logging tool having source and target with deuterium-tritium gas admixture |
| CN103527181A (en) * | 2012-07-05 | 2014-01-22 | 中国石油天然气集团公司 | Method and instrument for controllable source neutron logging during drilling |
| CN104500052A (en) * | 2014-11-27 | 2015-04-08 | 中国石油天然气集团公司 | Compensation density logging-while-drilling instrument |
| CN110056341A (en) * | 2018-01-18 | 2019-07-26 | 中石化石油工程技术服务有限公司 | One kind is with brill controllable source density logging device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090610 |
|
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20090610 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |