CN103953337B - A kind of NMR logging instrument probe - Google Patents
A kind of NMR logging instrument probe Download PDFInfo
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- CN103953337B CN103953337B CN201410209924.2A CN201410209924A CN103953337B CN 103953337 B CN103953337 B CN 103953337B CN 201410209924 A CN201410209924 A CN 201410209924A CN 103953337 B CN103953337 B CN 103953337B
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- magnetic
- permanent magnet
- magnetic pole
- magnetic core
- logging instrument
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Abstract
The invention discloses a kind of NMR logging instrument probe, it is fixed on NMR logging instrument, including permanent magnet and antenna；Permanent magnet is flat-cut column structure, and antenna symmetry is arranged on the both sides of the non-circular arc portion of permanent magnet, the magnetic sheet for extending magnetic pole is fixed with the arc-shaped edges of permanent magnet.The present invention can log well in wellbore multidimensional, increase effectively the investigation depth on stratum corresponding to arc-shaped edges.
Description
Technical field
The invention belongs to oil well logging device field, logging instrument probe is related generally to, more particularly to a kind of nuclear magnetic resonance
Logging instrument probe.
Background technology
Nuclear magnetic resonance log utilizes the liquid that hydrogen atom is rich in formation pore（Oil, water）And gas（Natural gas）Middle hydrogen
The NMR signal that core is produced after being excited, by well log interpretation, available for quantitatively determining effecive porosity, free fluid
The parameters such as porosity, the viscosity and wettability for fettering water pore volume, pore-size distribution, permeability and crude oil.
The probe designs of current nuclear magnetic resonance log are mainly based upon " Inside-out " thought, Schlumberger companies
CMR wall-attaching type schemes, the material improvement of the MAIL series probes of Numar companies and the structure optimization of probe, and MRX
With the eccentric probe of MREx series.Its difference is：" Inside-out " at least uses two parts permanent magnet, respectively to two pieces forever
Magnet axially reversely magnetize, and optimal annular detection region is obtained by the adjustment to axially placed permanent magnet spacing,
Permanent magnet is used for the magnetostatic field B for producing nuclear magnetic resonance0, placed between two cylindricality permanent magnets for producing RF magnetic field B1Day
Line, antenna includes coil and magnetic core, and coil is generally the improvement of solenoid structure, magnetic core be soft magnetic materials its be from more
Soft magnetic ferrite or magnet steel, thus in one magnetostatic field B of wellbore formation0With RF magnetic field B1Strict orthogonal, and B0Size
Uniform near-ring shape search coverage.On the stratum of different depth, B0It is of different sizes, that is, form gradient magnetic, can pass through change
Radiofrequency signal obtains the annular detection region on different depth stratum.Due to the limited length of instrument, the search coverage of the program compared with
Small, logging speed is also slower.CMR wall-attaching types probe is using three pieces of rectangular permanent magnet radial magnetizings, the parallel homopolarity of three pieces of permanent magnets
Place, only lay antenna in the side of permanent magnet pole, so only facing antenna side in the earth formation produces RF magnetic field, form nearly circle
The search coverage of cylinder.CMR probes only produce uniform magnetostatic field in a zonule in a direction, and search coverage is small,
Single-frequency measurement can only be carried out.MAIL series probes lay day using cylindrical structure permanent magnet radial magnetizing at cylindrical outer surface
Line, B is realized in radial section0With B1Strict orthogonal.Magnetic core, the stability of RF magnetic field are not placed in the antenna of MRIL probes
Bad, radio-frequency power is high.
The content of the invention
Goal of the invention：
The present invention relates to a kind of NMR logging instrument probe, its object is to by the structure design to magnet of popping one's head in and
The position of sound production of radio-frequency coil, can produce gradient fields in underground, obtain far and near different search coverage.
Technical scheme：
A kind of NMR logging instrument probe, is fixed on NMR logging instrument, it is characterised in that：Including permanent magnet and
Antenna；Permanent magnet is flat-cut column structure, and antenna symmetry is arranged on the both sides of the non-circular arc portion of permanent magnet, in the circle of permanent magnet
Arc side is fixed with the magnetic sheet for extending magnetic pole.
Permanent magnet is bonded by the magnetic pole of 10-20 block flat-cut column structures and formed, and the total length after bonding is 200cm, magnetic pole
It is made of sintered NdFeB or samarium-cobalt material, the cross section of magnetic pole is the center section of two symmetrical strings of circle, and section is formed
Symmetrical arc；Laid in the outside of magnetic pole circular arc with it with high cylindrical shell magnetic sheet monomer, be close to permanent magnet magnetic pole circular arc
Side is placed, and magnetic sheet monomer thickness is 10mm, and overall bonded by 10-20 block magnetic sheets monomer of magnetic sheet forms, the quantity of quantity and magnetic pole
It is consistent.
The cross section of magnetic pole is that a radius is 60-70mm circular, and distance is 90-100mm between the string of two symmetrical strings.
The flat-cut side that antenna is close to permanent magnet is set, including magnetic core and radio-frequency coil, and magnetic core is close to permanent magnet, radio-frequency coil
Around the home on magnetic core；Magnetic core uses soft magnetic ferrite, and is stacked forms piecewise.
Two side planes that magnetic core is close to permanent magnet are placed centrally, and magnetic core is by 40-50 block of the sectional dimension for 60mm × 20mm
Magnetic core lamination is stacked to be formed, and its overall length is identical with permanent magnet.
Advantage and effect：
This NMR logging instrument probe of the present invention, with advantages below and beneficial effect：
（1）Logged well using center on Page, permanent magnet is used as using the higher sintered NdFeB of magnetic energy product or samarium-cobalt material
Material, the magnetic sheet for extending magnetic pole effect is fixed with the arc-shaped edges of permanent magnet；
（2）Antenna makes full use of the remaining space of magnet to produce RF magnetic field, and the lamination of antenna core is used to reduce
The eddy-current loss that RF magnetic field is produced；
（3）Probe produces gradient magnetic in the stratum of wellbore, realizes to many of wellbore stratum different depth
Dimension well logging, the investigation depth on stratum corresponding to increase magnet arc-shaped edges.
Brief description of the drawings：
Fig. 1 is type NMR logging instrument probe front view placed in the middle of the invention, is half sectional view；
Fig. 2 is type NMR logging instrument probe structure top view placed in the middle of the invention；
Fig. 3 is type NMR logging instrument antenna core partial view placed in the middle of the invention；
Fig. 4 is to improve the radial section half sectional view popped one's head in after antenna structure.
Description of reference numerals：
1st, magnetic pole；2nd, magnetic core；3rd, radio-frequency coil；4th, magnetic sheet monomer；5th, magnetic core lamination；2-1, the first magnetic core；2-2, second
Magnetic core；2-3, the 3rd magnetic core.
Embodiment：
The present invention is described further with specific embodiment below in conjunction with the accompanying drawings：
The present invention relates to a kind of NMR logging instrument probe, permanent magnet uses sintered neodymium iron boron material or samarium-cobalt material,
Magnet is flat-cut column structure, along two circular arc opposite side radial magnetizings, the corresponding search coverage of two arc-shaped edges can be pushed away far, that is, increased
Investigation depth in this direction, can be achieved measurement placed in the middle.The flat-cut side that antenna is close to permanent magnet is placed, and its magnetic core is close to permanent magnetism
Body is placed, the coiling saddle coil on magnetic core.Magnetic core uses soft magnetic ferrite, and is stacked forms piecewise.In permanent magnet magnetic
Pole arc-shaped edges place fan-shaped shelly magnet, using magnetic steel material or amorphous magnetic material.
NMR logging instrument probe of the present invention, is fixed on NMR logging instrument, including permanent magnet and day
Line；Permanent magnet is flat-cut column structure, and antenna symmetry is arranged on the both sides of the non-circular arc portion of permanent magnet, in the circular arc of permanent magnet
While being fixed with the magnetic sheet for extending magnetic pole.
Permanent magnet is bonded by the magnetic pole 1 of 10-20 block flat-cut column structures and formed, and the total length after bonding is 200cm, magnetic pole
1 is made of sintered NdFeB or samarium-cobalt material, and the cross section of magnetic pole 1 is the center section of two symmetrical strings of circle, section shape
Into symmetrical arc；Laid in the outside of the circular arc of magnetic pole 1 with it with high cylindrical shell magnetic sheet monomer 4, be close to permanent magnet magnetic pole
Arc-shaped edges are placed, and magnetic sheet monomer thickness is 10mm, and overall bonded by 10-20 block magnetic sheets monomer of magnetic sheet forms, quantity and magnetic pole
Quantity is consistent（The main magnet for producing magnetostatic field is stacked viscous by 10-20 blocks magnetic pole and the magnetic sheet monomer consistent with its quantity
Knot is formed）；Magnetic sheet monomer uses magnetic steel material or amorphous magnetic material.
The cross section of magnetic pole 1 is the part in the middle of symmetrical string, and circular radius is 60-70mm, the string spacing of two symmetrical strings
From for 90-100mm, two circular arc opposite side are respectively N poles and S poles.
The flat-cut side that antenna is close to permanent magnet is set, including magnetic core 2 and radio-frequency coil 3, and magnetic core 2 is close to permanent magnet, radio frequency
Coil 3 is around the home on magnetic core 2（Radio-frequency coil 3 on the wire wrap being adapted with its shape and is fixed on magnetic core 2 around the home）；Magnetic
Core 2 uses soft magnetic ferrite, and is stacked forms piecewise.
Antenna is close to magnet and is placed centrally, i.e. magnetic core 2 is close to two side planes of permanent magnet and is placed centrally, and magnetic core 2 is grown
200cm, is stacked for 60mm × 20mm 40-50 block magnetic cores lamination 5 by sectional dimension and formed, its overall length is identical with permanent magnet.
The present invention can log well in wellbore multidimensional.Increase the investigation depth on stratum corresponding to arc-shaped edges.
Embodiment 1:
As shown in figure 1, center type permanent magnet of nuclear magnetic resonance logging instrument probe is using 10 pieces of sectional dimensions are identical, volume phase
Deng bonding and form to the magnetic pole of edge direction radial magnetizing along circular arc, total length is 200cm, and magnetic pole uses sintered neodymium iron boron material
It is made, the cross section of magnetic pole is the center section of two symmetrical strings of circle, and section forms symmetrical arc.The outer surface of magnetic pole is formed
Symmetrical curved surface and plane, are magnetized, two curved surface directions of magnetic pole are respectively N poles and S along the direction parallel with plane
Pole, forms fan-shaped gradient magnetic, and increase the investigation depth on stratum corresponding to arc in wellbore.A diameter of 140mm of magnetic pole,
The distance between two strings are 100mm, see Fig. 2.
As shown in figure 1, the antenna of type NMR logging instrument probe placed in the middle is made up of magnetic core 2 and radio-frequency coil 3, magnetic core
Formed by the stacked bonding of 40 blocks of magnetic core laminations 5, see Fig. 3.Its purpose is to reduce the eddy-current loss produced by radio-frequency current, penetrate
Frequency coil winding is on coil housing.
As shown in figure 1, magnetic sheet is posted at the permanent magnet arc magnetic pole two ends of type NMR logging instrument probe placed in the middle, magnetic sheet is
Bonded and formed by 10 magnetic sheet monomers 4 of specification identical, then bonded again with permanent magnet magnetic pole, its effect is that uniform permanent magnet exists
The magnetic field that is produced in stratum simultaneously pushes away search coverage far.
Embodiment 2:
Substantially the same manner as Example 1, except that antenna is gradient antenna, one end size for pressing close to permanent magnet is larger,
One end size away from permanent magnet is smaller, sees Fig. 4.The radial dimension for the magnetic core that the present embodiment is used for：First magnetic core 2-1 is
80mm × 8mm, the second magnetic core 2-2 are 70mm × 8mm, and the 3rd magnetic core 2-3 is 60mm × 5mm, axially still square as shown in Figure 3
Formula lamination.
Claims (3)
1. a kind of NMR logging instrument probe, is fixed on NMR logging instrument, it is characterised in that：Including permanent magnet and day
Line；Permanent magnet is flat-cut column structure, and along two circular arc opposite side radial magnetizings, antenna symmetry is arranged on the non-circular arc portion of permanent magnet
Both sides, be fixed with the magnetic sheet for extending magnetic pole in the arc-shaped edges of permanent magnet；Permanent magnet is by 10-20 block flat-cut column structures
Magnetic pole（1）Bonding is formed, and the total length after bonding is 200cm, magnetic pole（1）It is made of sintered NdFeB or samarium-cobalt material, magnetic
Post（1）Cross section for circle two symmetrical strings center section, section forms symmetrical arc；In magnetic pole（1）The outside of circular arc
Lay with it with high cylindrical shell magnetic sheet monomer（4）, it is close to the placement of permanent magnet magnetic pole arc-shaped edges, magnetic sheet monomer thickness is
10mm, overall bonded by 10-20 block magnetic sheets monomer of magnetic sheet is formed, and the quantity of quantity and magnetic pole is consistent；Magnetic pole（1）It is transversal
Face is that a radius is 60-70mm circular, and distance is 90-100mm between the string of two symmetrical strings.
2. NMR logging instrument probe according to claim 1, it is characterised in that：Antenna is close to the flat-cut side of permanent magnet
Set, including magnetic core（2）And radio-frequency coil（3）, magnetic core（2）It is close to permanent magnet, radio-frequency coil（3）Around the home in magnetic core（2）On；Magnetic
Core（2）Using soft magnetic ferrite, and piecewise be stacked form.
3. NMR logging instrument probe according to claim 2, it is characterised in that：Magnetic core（2）It is close to the two of permanent magnet
Side plane is placed centrally, magnetic core（2）By the 40-50 block magnetic core laminations that sectional dimension is 60mm × 20mm（5）Stacked to form, its is total
Length is identical with permanent magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209924.2A CN103953337B (en) | 2014-05-19 | 2014-05-19 | A kind of NMR logging instrument probe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410209924.2A CN103953337B (en) | 2014-05-19 | 2014-05-19 | A kind of NMR logging instrument probe |
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| CN103953337A CN103953337A (en) | 2014-07-30 |
| CN103953337B true CN103953337B (en) | 2017-08-11 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105201498B (en) * | 2015-09-23 | 2018-03-09 | 中国石油大学(北京) | Nuclear magnetic resonance downhole fluid analysis instrument |
| CN108802836B (en) * | 2018-05-28 | 2020-03-24 | 中石化石油工程技术服务有限公司 | Nuclear magnetic resonance device and logging instrument thereof |
| CN111810134B (en) * | 2019-12-26 | 2024-03-26 | 北京默凯斯威能源技术有限公司 | Probe magnet device of petroleum nuclear magnetic resonance logging instrument |
| CN113161101B (en) * | 2020-01-20 | 2023-11-28 | 中国石油天然气股份有限公司 | Permanent magnet for nuclear magnetic resonance logging instrument |
| CN111472766A (en) * | 2020-05-06 | 2020-07-31 | 中国石油天然气集团有限公司 | Magnet of downhole nuclear magnetic resonance logging instrument |
| CN111827995B (en) * | 2020-07-31 | 2023-07-25 | 中国石油天然气集团有限公司 | Nuclear magnetic resonance-based calculation method for permeability of overpressure conglomerate reservoir |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2192615Y (en) * | 1994-05-24 | 1995-03-22 | 苗世玉 | Magnetic water apparatus |
| CN1691412A (en) * | 2004-04-27 | 2005-11-02 | Nec东金株式会社 | Coil antenna |
| US7164266B2 (en) * | 2003-03-07 | 2007-01-16 | Precision Energy Services, Inc. | Nuclear magnetic resonance tool with conductive and non-conductive magnet assembly |
| CN101097799A (en) * | 2006-06-30 | 2008-01-02 | 中国石油天然气集团公司 | Permanent magnet for NMR logging instrument probe |
| CN101294493A (en) * | 2007-04-29 | 2008-10-29 | 中国石油天然气集团公司 | Center type permanent magnet of nuclear magnetic resonance logging instrument probe |
| CN201546719U (en) * | 2009-11-11 | 2010-08-11 | 中国海洋石油总公司 | Focusing nuclear magnetic resonance eccentric well-logging probe |
| CN203867568U (en) * | 2014-05-19 | 2014-10-08 | 沈阳工业大学 | Nuclear magnetic resonance well logger probe |
-
2014
- 2014-05-19 CN CN201410209924.2A patent/CN103953337B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2192615Y (en) * | 1994-05-24 | 1995-03-22 | 苗世玉 | Magnetic water apparatus |
| US7164266B2 (en) * | 2003-03-07 | 2007-01-16 | Precision Energy Services, Inc. | Nuclear magnetic resonance tool with conductive and non-conductive magnet assembly |
| CN1691412A (en) * | 2004-04-27 | 2005-11-02 | Nec东金株式会社 | Coil antenna |
| CN101097799A (en) * | 2006-06-30 | 2008-01-02 | 中国石油天然气集团公司 | Permanent magnet for NMR logging instrument probe |
| CN101294493A (en) * | 2007-04-29 | 2008-10-29 | 中国石油天然气集团公司 | Center type permanent magnet of nuclear magnetic resonance logging instrument probe |
| CN201546719U (en) * | 2009-11-11 | 2010-08-11 | 中国海洋石油总公司 | Focusing nuclear magnetic resonance eccentric well-logging probe |
| CN203867568U (en) * | 2014-05-19 | 2014-10-08 | 沈阳工业大学 | Nuclear magnetic resonance well logger probe |
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