CN201288549Y - Digital focus array induction well measurement instrument - Google Patents
Digital focus array induction well measurement instrument Download PDFInfo
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- CN201288549Y CN201288549Y CNU200820222483XU CN200820222483U CN201288549Y CN 201288549 Y CN201288549 Y CN 201288549Y CN U200820222483X U CNU200820222483X U CN U200820222483XU CN 200820222483 U CN200820222483 U CN 200820222483U CN 201288549 Y CN201288549 Y CN 201288549Y
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- standard shaft
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Abstract
The utility model relates to a digital focusing array induction log tool which comprises a data collection control unit, a coil array unit and a pressure balancing unit. The data collection control unit is connected with the coil array unit through a low noise amplifier unit. The coil array unit comprises a ceramic standard shaft which is sleeved with a radiation coil and receiving coil array sequentially from the lower part to the upper part. The upper end of ceramic standard shaft is connected with the low noise amplifier unit. The ceramic standard shaft and the low noise amplifier unit are packed in an insulating casing. The lower end of insulating casing is connected with a pressure balancing unit which comprises a casing. The casing is provided with a through hole and is installed with a corrugated pipe, a central bracket and an end cap. The induction log tool adopts a structural design of high efficiency ceramic coil array and has the advantages of increased whole efficiency of coil array, reduced device length and alleviated device weight. The log tool according to the utility model can operate in the down-well environment with temperature of 175 DEG C and pressure of 120 MPa.
Description
Technical field
The utility model belongs to the oil well logging field, relates to a kind of logging instrument, especially a kind of digital focus array induction logging tool.
Background technology
The digital focus array induction logging tool is a kind of digitized novel resistivity measurement instrument, is one of logger of using in the well logging engineering.
In the prior art, mainly there is following shortcoming in China oil field at the analogue inductive logging instrument of usefulness: the instrument dynamic range is low; Logging efficiency is not high; Longitudinal frame is low; Can not use the variation characteristic of iamge description formation resistivity intuitively.
Domestic part oil field mainly is a product of introducing companies such as external Atlas, Halliburton at the array induction log tool of usefulness, because these products are U.S.'s developments before and after the nineties in last century, integrated level is low, and price is expensive, and maintenance is used inconvenient.At home, also in development experiments, technical scheme has nothing in common with each other similar technology, for example the patent No. is that 200420088068.1 signal acquisition circuit is many dsp chips structure, and coil is the bilateral structure of 17 coils, and piston cylinder operator is adopted in pressure balance, instrument is oversize, uses maintenance inconvenient.
The utility model content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, a kind of efficient height, short novel induction log tool of length that can satisfy oil field prospecting well logging demand is provided, this logging instrument is operated in 175 ℃, the subsurface environment of 120MPa, can Formation Resistivity Measurement information, determine the concrete depth location of oil-gas Layer, be convenient to reservoir exploitation in the down-hole.
The purpose of this utility model solves by the following technical programs:
This digital focus array induction logging tool, the low-noise amplifier that comprises the data acquisition control unit, is electrically connected with the data acquisition control unit, with the coil array unit and the pressure compensation unit that is connected with the coil array unit of low-noise amplifier electrical connection, it is characterized in that: described data acquisition control unit is a digital signal processing core with a slice dsp chip, and described dsp chip is connected with A/D modular converter, power supply/temperature observation circuit, DTB transmission unit, CPLD chip, DI/DO data imput output circuit and countdown circuit respectively; Described A/D modular converter receives from the analog signal of low-noise amplifier and is converted into data signal and sends dsp chip to, wherein the automatic gain setting of A/D modular converter is controlled by DI/DO data imput output circuit, the sampling rate of A/D modular converter is by the CPLD chip controls, described power supply/temperature observation circuit is connected with dsp chip through the SPI interface, described DTB transmission unit has the DTB interface and can carry out sequential and level conversion with the DTB bus, described countdown circuit comprises excitation signal generator, it receives the enable signal from dsp chip, and the analog multichannel switch of described excitation signal generator is by the CPLD chip controls.
Above-mentioned dsp chip is ADSP2185.
Above-mentioned A/D modular converter is 24 A/D converters.
Above-mentioned coil array unit includes a ceramic standard shaft, described ceramic standard shaft is arranged with transmitting coil and receiving coil array from bottom to top successively, described ceramic standard shaft upper end is connected with low-noise amplifier, described ceramic standard shaft and low-noise amplifier are wrapped in the insulation crust, described insulation crust is provided with oil-through hole, described insulation crust lower end is connected with pressure compensation unit, and described pressure compensation unit includes shell, is provided with bellows, center bearing bracket and tail cap in the described shell.
Above-mentioned receiving coil array is made up of at least ten Ceramic Composite coils, and it is arranged and be sheathed on respectively on the periphery wall of described ceramic standard shaft with single-side structural, and the axial distance between each Ceramic Composite coil of described receiving coil array is 1.6～4.8mm.
Bellows in the above-mentioned pressure compensation unit is a rubber bellows, described bellows is located at through the lock ring silk braid and is formed an oil storage cavity body on the center bearing bracket, the longitudinal balance oil-through hole of described oil storage cavity body in being opened in center bearing bracket communicates with oil-through hole on the described coil array unit (11), described center bearing bracket is nested in the shell, described shell is vertically to offer through hole on cylindrical shape and its wall, and described tail cap is installed on the lower end of described shell.
The beneficial effects of the utility model are as follows:
Digital focus induction log tool of the present utility model adopts two-frequency operation, enlarged the measurement dynamic range of instrument, in order to realize well logging and scale real-time signal acquisition, the appropriate cable transmission requirement reduces signal transmission rate, and downhole instrument adopts 1 novel dsp chip technology, carry out digital signal acquiring and filtering, fast operation is convenient to realize the processing of discrete fourier transform DFT digital filtering and phase sensitive detection, the packed data transmission quantity.The data acquisition control unit is the complete circuit instrument system that a signal condition, control in real time, data acquisition and data are treated to one.
Description of drawings
Fig. 1 is a general structure block diagram of the present utility model;
Fig. 2 is the structural representation of coil array of the present utility model unit 10;
Fig. 3 is pressure compensation unit 11 structural representations of the present utility model.
Wherein: 1 is the data acquisition control unit; 2 is the A/D modular converter; 3 is power supply/temperature observation circuit; 4 is dsp chip; 5 is the DTB transmission unit; 6 is the CPLD chip; 7 is DI/DO data imput output circuits; 8 is countdown circuit; 9 is low-noise amplifier; 10 is the coil array unit; 11 is pressure compensation unit; 12～22 are the Ceramic Composite coil; 23 is transmitting coil; 24 is ceramic standard shaft; 25 is oil-through hole; 26 is insulation crust; 27 is shell; 28 is center bearing bracket; 29 is the lock ring silk; 30 is the tail cap; 31 is the balance oil-through hole; 32 is through hole; 33 are the oil storage cavity body; 34 is bellows.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:
Referring to Fig. 1 is general structure block diagram of the present utility model, comprise data acquisition control unit 1, the low-noise amplifier 9 that is electrically connected with data acquisition control unit 1, coil array unit 10 and the pressure compensation unit 11 that is connected with coil array unit 10 with low-noise amplifier 9 electrical connections, wherein data acquisition control unit 1 is a digital signal processing core with a slice dsp chip 4, described dsp chip can adopt the DSP chip ADSP2185 of AD company, and described dsp chip 4 is connected with A/D modular converter 2 respectively, power supply/temperature observation circuit 3, DTB transmission unit 5, CPLD chip 6, DI/DO data imput output circuit 7 and countdown circuit 8; Described A/D modular converter 2 receives from the analog signal of low-noise amplifier 9 and is converted into data signal and sends dsp chip 4 to, wherein the automatic gain setting of A/D modular converter 2 is by 7 controls of DI/DO data imput output circuit, the sampling rate of A/D modular converter 2 is by 6 controls of CPLD chip, described power supply/temperature observation circuit 3 is connected with dsp chip 4 through the SPI interface, described DTB transmission unit 5 has the DTB interface and can carry out sequential and level conversion with the DTB bus, described countdown circuit 8 comprises excitation signal generator, it receives the enable signal from dsp chip 4, and the analog multichannel switch of described excitation signal generator is by 6 controls of CPLD chip.
Following each module of specifically introducing the utility model composition data acquisition control unit 1 according to Fig. 1:
Dsp chip 4: be digital signal processing core, described dsp chip can adopt the DSP chip ADSP2185 of AD company
ADC in the A/D modular converter 2:24 position A/D modular converter 2 is a digital to analog converter, divides four road synchronized samplings, and sampling rate is 500KHz, by CPLD module 6 control sampling rates; AGC is an automatic gain control amplifier, and in 24 A/D modular converters 2, automatic gain is set to take advantage of 1 to take advantage of 20 two grades, by 7 controls of DI/DO data imput output circuit; Chip as A/D modular converter 2 is the A/D conversion chip AD7738 of AD company.
Power supply/temperature observation circuit 3: be 12 AD conversions of six passages, be connected with dsp chip 4 to have the function of monitoring instrument supply voltage and interior 4 the different local temperature of circuit tube by the SPI interface.
DTB transmission unit 5: the DTB interface on it is connected with the DTB bus, finishes sequential and level conversion with the DTB bus, wherein IRQ1 be the order clock, FI is the down order data; IRQ0 be data clock, FO is a upstream data.UCLK is for upwards transmitting data clock, and there is switch control inside, realizes the serial transmission sequential of daisy chain.
CPLD chip 6: it has formed CPLD sequential/logical block, the sampling time sequence of control ADC and the sequential/logic that transmits.It is the sampling enabling signal that is produced ADC by inner frequency dividing circuit and pulse shaping circuit, and FL0 is a sampling/stop control signal.This unit is controlled the sequential/logic of trapezoidal wave excitation signal generator simultaneously, and the frequency of pumping signal is controlled by SXLK1, and its internal counter and logic circuit produce the excitation signal waveforms that needs, and the CPLD chip can adopt EPM70128.
DI/DO data imput output circuit 7: be the digital quantity input/output module, it satisfies ADC gain control and instrument works in well logging, the pattern at quarter, interior quarter is provided with function outward.
Countdown circuit 8: it comprises excitation signal generator, excitation signal generator inside is eight to select an analog multichannel switch, FL1 is an enable signal, by the state of CPLD chip 6 control excitation signal generator switches, connects the pumping signal that four resistance pressure-dividing networks produce three level staircase waveforms.
Fig. 2 is the structure diagram of coil array of the present utility model unit 10, coil array unit 10 includes a ceramic standard shaft 24, pottery standard shaft 24 is arranged with transmitting coil 23 and receiving coil array from bottom to top successively, described receiving coil array is made up of 11 Ceramic Composite coils 12～22, coil array unit 10 is a single-side structural, be that a side that receiving coil is displayed in transmitting coil 23 is arranged and Ceramic Composite coil 12～22 and transmitting coil 23 are set on the periphery wall of ceramic standard shaft 24 respectively, and transmitting coil 23 and 11 Ceramic Composite coils 12～22 distribute according to certain spacing, the axial distance of its each coil is 1.6～4.8mm, so that the directly coupling signal fine adjustment.Described ceramic standard shaft 24 upper ends are connected with low-noise amplifier 9, described ceramic standard shaft 24 and low-noise amplifier 9 are wrapped in the insulation crust 26, nested installation forms an airtight cavity thereby pottery standard shaft 24 and insulation crust 26 two ends cooperatively interact, pottery standard shaft 24 is in the airtight cavity of insulation crust 26, the end installation end of pottery standard shaft 24 covers and is provided with oil-through hole 25, the oil storage cavity body 33 of it and pressure compensation unit 11 is connected, and described insulation crust 26 is high-intensity polymer composite insulation crust.
Followingly specifically introduce transmitting coil 23 of the present utility model and receiving coil array according to Fig. 2:
As shown in FIG., the receiving coil array is made of 11 Ceramic Composite coils 12～22 that are wound on the ceramic standard shaft 24, wherein each receiving array is connected in series by adjacent two counter disturbing of receiving coil, one of them is main receiving coil, another is auxilliary receiving coil, each compound coil is made up of the main receiving coil of current array and the auxilliary receiving coil of following an array, the enamel-covered wire of two receiving coils is disturbed to instead, auxilliary receiving coil and transmitting coil distance are near, main receiving coil and transmitting coil distance are used to offset straight coupling component.Each coil and ceramic standard shaft 24 coiled helicitic textures, line is apart between 1.6mm-4.8mm, and coefficient of thermal expansion is little, the temperature stability height, the directly coupling signal fine setting is convenient.Resolution ratio and investigation depth are by the spacing control of main receiving coil and transmitting coil, and spacing is short more, and longitudinal frame is high more, and investigation depth is shallow more, otherwise spacing is long, and then investigation depth is dark, but resolution ratio is low.After the signal of each array received is handled through low-noise amplifier 9 and data acquisition control unit 1, pass to ground system by DTB transmission unit 5 after, again through the synthetic formation resistivity information that obtains of handling of software.
Fig. 3 is the structure diagram of pressure compensation unit 11 of the present utility model, pressure compensation unit 11 includes shell 27, be provided with bellows 34 in the shell 27, center bearing bracket 28 and tail cap 30, bellows 34 is a rubber bellows, it is a truncated cone-shaped, height is between 400-800mm, end face diameter and bottom surface diameter are respectively between Φ 30-45mm and Φ 60-85mm, described bellows is sheathed on through lock ring silk 29 and forms an oil storage cavity body 33 on the center bearing bracket 28, center bearing bracket 28 as shown in FIG., it is the big and little cylinder of middle part diameter of two ends diameter, if bellows 34 is longer, a round platform can also be set in the centre position fix screwed pipe, and at the round platform axis at middle part to also being processed with oil through so that the cavity of round platform both sides is communicated with; The longitudinal balance oil-through hole 31 of described oil storage cavity body 33 in being opened in center bearing bracket 28 communicates with described oil-through hole 25, described center bearing bracket 28 is nested in the shell 27, shell 31 encases center bearing bracket 28 and bellows 34, and described shell 27 is for vertically offering the through hole 32 that a plurality of diameters are 6～18mm on cylindrical shape and its wall; Tail cap 30 is installed on the lower end of shell 27 and center bearing bracket 28, can dismantle, and carries out the oiling operation in the bellows 34 with convenient giving.
Above pressure compensation unit 11 is filled with silicone oil earlier, and is made bellows 34 and coil array internal pressure balance before work in oil storage cavity body 33.Instrument is when underground work, because it is logical that balance sysmte shell 27 has in aperture 32 and the well mud liquid phase, under the pressure effect of mud liquid, by bellows 34 and balance oil-through hole 31 hydraulic oil in the oil storage cavity body 33 is delivered to coil array inside, thereby the external and internal pressure that guarantees coil array insulation crust 26 keeps balance, and coil array insulation crust 26 is not damaged by pressure break.
The utility model adopts up-to-date 1 dsp chip and CPLD technical design, and 12 Ceramic Composite coils constitute coil arrays, and pressure balance is a bellows structure, and only 7.66 meters of instrument length overalls have overcome the deficiencies in the prior art effectively.This kind induction log tool adopts the structure design of high-efficiency ceramic coil array array, improves the coil array whole efficiency, has shortened tool length, has alleviated instruments weight, uses operation very convenient.Compare with domestic and international prior art, the technology formation of this utility model has character of innovation.
Preferred various chip models of described in conjunction with the accompanying drawings above the utility model or circuit module; not as restriction to aforementioned utility model purpose and appended claims content and scope; any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done all still belong to the utility model technology and rights protection category.
Claims (6)
1. digital focus array induction logging tool, comprise data acquisition control unit (1), the low-noise amplifier (9) that is electrically connected with data acquisition control unit (1), coil array unit (10) and the pressure compensation unit (11) that is connected with coil array unit (10) with low-noise amplifier (9) electrical connection, it is characterized in that: described data acquisition control unit (1) is a digital signal processing core with a slice dsp chip (4), and described dsp chip (4) is connected with A/D modular converter (2) respectively, power supply/temperature observation circuit (3), DTB transmission unit (5), CPLD chip (6), DI/DO data imput output circuit (7) and countdown circuit (8); Described A/D modular converter (2) receives from the analog signal of low-noise amplifier (9) and is converted into data signal and sends dsp chip (4) to, wherein the automatic gain setting of A/D modular converter (2) is controlled by DI/DO data imput output circuit (7), the sampling rate of A/D modular converter (2) is controlled by CPLD chip (6), described power supply/temperature observation circuit (3) is connected with dsp chip (4) through the SPI interface, described DTB transmission unit (5) has the DTB interface and can carry out sequential and level conversion with the DTB bus, described countdown circuit (8) comprises excitation signal generator, it receives the enable signal from dsp chip (4), and the analog multichannel switch of described excitation signal generator is controlled by CPLD chip (6).
2. digital focus array induction logging tool according to claim 1 is characterized in that: described dsp chip (4) is ADSP2185.
3. digital focus array induction logging tool according to claim 1 is characterized in that: described A/D modular converter (2) is 24 A/D converters.
4. digital focus array induction logging tool according to claim 1, it is characterized in that: described coil array unit (10) includes a ceramic standard shaft (24), described ceramic standard shaft (24) is arranged with transmitting coil (23) and receiving coil array from bottom to top successively, described ceramic standard shaft (24) upper end is connected with low-noise amplifier (9), described ceramic standard shaft (24) and low-noise amplifier (9) are wrapped in the insulation crust (26), pottery standard shaft (24) with insulation crust (26) thus two ends make the airtight cavity of insulation crust (26) formation one through the nested installation of end cap is installed, the installation end of described ceramic standard shaft (24) bottom covers and is provided with oil-through hole (25), and described insulation crust (26) lower end is connected with pressure compensation unit (11).
5. digital focus array induction logging tool according to claim 4, it is characterized in that: described receiving coil array is made up of at least ten Ceramic Composite coils (12～22), it is arranged and is sheathed on respectively on the periphery wall of described ceramic standard shaft (24) with single-side structural, and the axial distance between each Ceramic Composite coil of described receiving coil array is 1.6～4.8mm.
6. digital focus array induction logging tool according to claim 1, it is characterized in that: described pressure compensation unit (11) includes shell (27), be provided with bellows (34) in the described shell (27), center bearing bracket (28) and tail cap (30), bellows (34) is a rubber bellows, described bellows (34) is sheathed on center bearing bracket (28) through lock ring silk (29) and goes up formation one oil storage cavity body (33), the longitudinal balance oil-through hole (31) of described oil storage cavity body (33) in being opened in center bearing bracket (28) communicates with oil-through hole (25) on the described coil array unit (11), described center bearing bracket (28) is nested in the shell (27), described shell (27) is for vertically offering through hole (32) on cylindrical shape and its wall, and described tail cap (30) is installed on the lower end of described shell (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820222483XU CN201288549Y (en) | 2008-11-17 | 2008-11-17 | Digital focus array induction well measurement instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820222483XU CN201288549Y (en) | 2008-11-17 | 2008-11-17 | Digital focus array induction well measurement instrument |
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| CN201288549Y true CN201288549Y (en) | 2009-08-12 |
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| CNU200820222483XU Expired - Fee Related CN201288549Y (en) | 2008-11-17 | 2008-11-17 | Digital focus array induction well measurement instrument |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242627A (en) * | 2010-05-12 | 2011-11-16 | 中国石油天然气集团公司 | Inductive probe for inducing array structure of coils |
| CN103670367A (en) * | 2012-09-07 | 2014-03-26 | 中国石油天然气集团公司 | Detection performance testing device of array sensing well detection instrument |
| CN104481525A (en) * | 2014-11-28 | 2015-04-01 | 中国石油天然气集团公司 | Quick-measurement array induction logging system and method |
| CN107256316A (en) * | 2017-06-21 | 2017-10-17 | 山东大学 | A kind of electromagnetic logging inversion method based on the lower artificial intelligence of high speed forward modeling result training |
| CN110410067A (en) * | 2019-08-02 | 2019-11-05 | 中国石油天然气集团有限公司 | A kind of induction field logging instrument |
| CN113640899A (en) * | 2021-07-27 | 2021-11-12 | 西安理工大学 | Telescopic remote transmission integration rain gauge |
-
2008
- 2008-11-17 CN CNU200820222483XU patent/CN201288549Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242627A (en) * | 2010-05-12 | 2011-11-16 | 中国石油天然气集团公司 | Inductive probe for inducing array structure of coils |
| CN103670367A (en) * | 2012-09-07 | 2014-03-26 | 中国石油天然气集团公司 | Detection performance testing device of array sensing well detection instrument |
| CN103670367B (en) * | 2012-09-07 | 2016-08-03 | 中国石油天然气集团公司 | A kind of array induction logging instrument detection performance test device |
| CN104481525A (en) * | 2014-11-28 | 2015-04-01 | 中国石油天然气集团公司 | Quick-measurement array induction logging system and method |
| CN104481525B (en) * | 2014-11-28 | 2017-06-06 | 中国石油天然气集团公司 | A kind of fast survey array induction logging system and its logging method |
| CN107256316A (en) * | 2017-06-21 | 2017-10-17 | 山东大学 | A kind of electromagnetic logging inversion method based on the lower artificial intelligence of high speed forward modeling result training |
| CN107256316B (en) * | 2017-06-21 | 2020-12-18 | 山东大学 | Artificial intelligence electromagnetic logging inversion method based on high-speed forward result training |
| CN110410067A (en) * | 2019-08-02 | 2019-11-05 | 中国石油天然气集团有限公司 | A kind of induction field logging instrument |
| CN110410067B (en) * | 2019-08-02 | 2022-08-02 | 中国石油天然气集团有限公司 | Induction electric field logging instrument |
| CN113640899A (en) * | 2021-07-27 | 2021-11-12 | 西安理工大学 | Telescopic remote transmission integration rain gauge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 Termination date: 20161117 |