CN105275465B - Nuclear magnetic resonance logging system - Google Patents
Nuclear magnetic resonance logging system Download PDFInfo
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- CN105275465B CN105275465B CN201510613620.7A CN201510613620A CN105275465B CN 105275465 B CN105275465 B CN 105275465B CN 201510613620 A CN201510613620 A CN 201510613620A CN 105275465 B CN105275465 B CN 105275465B
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Abstract
The present invention provides a kind of nuclear magnetic resonance logging system, including：Mud tube, controller, controllable pump, spectrometer, radio receiving transmitting module, detection pipe and detection device；The mud tube is for extracting down-hole drilling fluids, and underground is stretched into one end of the mud tube, and the other end is connected with drilling fluid pot；One end of the detection pipe is connected with the mud tube, and the outlet of the other end and the controllable pump, the import of the controllable pump is connected with the mud tube；The detection device is arranged in the detection pipe, the detection device is connected with the spectrometer；The spectrometer and the controllable pump are communicated by the radio receiving transmitting module with the controller.Nuclear magnetic resonance logging system provided by the invention, realize the remote control of real-time detection and the drilling fluid detection of drilling fluid, the defects of wire communication wiring is complicated and failure is difficult to search trouble point is overcome, enhances the adaptability and stability of nuclear magnetic resonance logging system.
Description
Technical field
The present invention relates to nuclear magnetic resonance technique field more particularly to a kind of nuclear magnetic resonance logging systems.
Background technology
Drilling fluid is the blood of oil drilling, in addition to having cleaning shaft bottom, cutting carring, lubrication drill bit, being evenly laminated
Power is transmitted outside a series of functions of ensureing drilling safety and carry out such as hydraulic power, even more finds underground oil and gas, description formation lithology
With the important information carrier of evaluation reservoir property.Therefore, property of drilling fluid is detected and describes during petroleum drilling control with non-
Normal consequence.
In order to detect the performance of drilling fluid, drilling fluid sample can be acquired, and in the lab in well head in drilling process
It is detected using nuclear magnetic resonance technique, the oil content of drilling fluid can be measured, reflects corresponding formation information.
It is in place of the deficiencies in the prior art, needs to bring collected drilling fluid in laboratory into and be detected, step
Cumbersome, real-time is poor, less efficient, and cannot find the problem in drilling process in time, for example, when there is a large amount of oil gas to mix
It is possible that well kick or blowout, damage equipment and staff when entering drilling fluid.
Invention content
The present invention provides a kind of nuclear magnetic resonance logging system, to solve in the prior art to the detection efficiency of drilling fluid compared with
Low, the technical issues of real-time is poor.
The present invention provides a kind of nuclear magnetic resonance logging system, including：Mud tube, controller, controllable pump, spectrometer, wireless receipts
Send out module, detection pipe and detection device；
For the mud tube for extracting down-hole drilling fluids, underground, the other end and drilling fluid are stretched into one end of the mud tube
Pond is connected；
One end of the detection pipe is connected with the mud tube, the outlet of the other end and the controllable pump, it is described can
The import of control pump is connected with the mud tube；
The detection device is arranged in the detection pipe, the detection device is connected with the spectrometer；
The spectrometer and the controllable pump are communicated by the radio receiving transmitting module with the controller；
Wherein, the controller is used to send open command to the controllable pump, and control command is sent to the spectrometer, and
Receive the testing result that the spectrometer is sent；
The controllable pump is used for the drilling well in the mud tube after the open command for receiving the controller transmission
Liquid is drawn into the detection pipe；
The spectrometer is used to after the control command for receiving the controller transmission send to the detection device to encourage
Signal, and receive the detection signal that the detection device is returned according to the pumping signal, according to the detection signal generation inspection
It surveys result and is sent to the controller.
Further, the detection device includes antenna and toroidal magnet, and the toroidal magnet is set in the detection pipe
On, the antenna is arranged between the magnet and the detection pipe.
Further, the nuclear magnetic resonance logging system, further includes：The leadage circuit in parallel with the antenna；
The leadage circuit includes the metal-oxide-semiconductor and resistance of series connection, and the input terminal of the metal-oxide-semiconductor is electrically connected with the spectrometer.
Further, for the magnetizing direction of the magnet to be axial, the antenna is solenoid antenna.
Further, the nuclear magnetic resonance logging system, further includes：The flow sensor being arranged in the detection pipe；
The flow sensor is electrically connected with the spectrometer, for the flow information detected to be sent to the spectrometer.
Further, the nuclear magnetic resonance logging system, further includes：The temperature sensor being arranged in the detection pipe；
The temperature sensor is electrically connected with the spectrometer, for the temperature information detected to be sent to the spectrometer.
Further, the spectrometer includes control process circuit and power amplification circuit；
It is communicated between the control process circuit and the controller by radio receiving transmitting module realization；
The input terminal of the power amplification circuit is electrically connected with the control process circuit, output terminal by first switch with
The antenna electrical connection.
Further, the spectrometer further includes pre-amplification circuit；
The output terminal of the pre-amplification circuit is electrically connected with the control process circuit, input terminal by second switch with
The antenna electrical connection.
Nuclear magnetic resonance logging system provided by the invention, including the detection pipe connected with mud tube, the import of controllable pump with
Mud tube connects, and outlet is connected with detection pipe, and the drilling fluid in mud tube can be drawn into detection pipe, is arranged in detection pipe
There is detection device, detection device can detect the NMR signal generated in drilling fluid, and be sent to spectrometer, and spectrometer will be analyzed
Obtained testing result is sent to controller, realizes the real-time detection of drilling fluid, and step is simple, and efficiency is higher, and can and
The problem in Shi Faxian drilling process, avoids the occurrence of drilling failure.In addition, controller passes through radio receiving transmitting module and spectrum
Instrument, controllable pump communicate, and realize remote control, overcome wire communication wiring complexity and failure is difficult to search event
The defects of barrier point, enhances the adaptability and stability of nuclear magnetic resonance logging system.
Description of the drawings
Fig. 1 is the structure diagram of nuclear magnetic resonance logging system provided in an embodiment of the present invention；
Fig. 2 is the structure diagram of isocon in nuclear magnetic resonance logging system provided in an embodiment of the present invention；
Fig. 3 is the structure diagram of detection device in nuclear magnetic resonance logging system provided in an embodiment of the present invention；
Fig. 4 is the work flow diagram of nuclear magnetic resonance logging system provided in an embodiment of the present invention；
Fig. 5 is the connection diagram of leadage circuit and antenna in nuclear magnetic resonance logging system provided in an embodiment of the present invention；
Fig. 6 is the structure diagram of spectrometer in nuclear magnetic resonance logging system provided in an embodiment of the present invention.
Reference numeral：
1- mud tube 11- drilling fluid 2- controller 3- controllable pumps
4- spectrometer 41- control process circuit 42- power amplification circuit 43- first switches
44- pre-amplification circuit 45- second switch 5- radio receiving transmitting module 6- detection pipes
7- detection device 71- toroidal magnet 8- isocon 81- first ports
82- second port 83- third port 9- connecting tube 10- leadage circuits
101-MOS pipe 102- resistance 103- antennas
Specific embodiment
Purpose, technical scheme and advantage to make the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without creative efforts shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of nuclear magnetic resonance logging system.Fig. 1 is nuclear magnetic resonance provided in an embodiment of the present invention
The structure diagram of logging system.As shown in Figure 1, the nuclear magnetic resonance logging system in the present embodiment, can include：Mud tube 1,
Controller 2, controllable pump 3, spectrometer 4, radio receiving transmitting module 5, detection pipe 6 and detection device 7；
For mud tube 1 for extracting down-hole drilling fluids 11, underground, the other end and drilling fluid pot phase are stretched into one end of mud tube 1
Even；
One end of detection pipe 6 is connected with mud tube 1, the outlet of the other end and controllable pump 3, the import of controllable pump 3 with
Mud tube 1 connects；
Detection device 7 is arranged in detection pipe 6, detection device 7 is connected with spectrometer 4；
Spectrometer 4 and controllable pump 3 are communicated by radio receiving transmitting module 5 with controller 2；
Wherein, controller 2 is used to send open command to controllable pump 3, and control command is sent, and receive spectrometer 4 to spectrometer 4
The testing result of transmission；
Controllable pump 3 is used to be drawn into the drilling fluid 11 in mud tube 1 after the open command for receiving the transmission of controller 2
In detection pipe 6；
Spectrometer 4 is used to send pumping signal to detection device 7, and connect after the control command for receiving the transmission of controller 2
The detection signal that examined device 7 is returned according to pumping signal is sent to controller 2 according to detection signal generation testing result.
Specifically, it can be accomplished in several ways and connect between the mud tube 1 in the present embodiment and detection pipe 6, for example,
It is connected between mud tube 1 and detection pipe 6 by isocon 8.Fig. 2 is nuclear magnetic resonance logging system provided in an embodiment of the present invention
The structure diagram of middle isocon 8.As depicted in figs. 1 and 2, mud tube 1 can be divided into multistage pipeline, and there are three the tools of isocon 8
Port, first port 81 can be connect with a segment pipe of mud tube 1, and second port 82 and another segment pipe of mud tube 1 connect
It connects, third port 83 is connect with detection pipe 6, thereby realizes the connection of detection pipe 6 and mud tube 1.Alternatively, mud tube 1 with
Detection pipe 6 can be an integral molding structure, and be directly realized by connection.
The import of controllable pump 3 is also connected with mud tube 1, and specifically, the import of controllable pump 3 can pass through one section of connecting tube 9
It is connected with mud tube 1, can be connected between mud tube 1 and connecting tube 9 by isocon 8 or mud tube 1 and connecting tube 9 can
To be an integral molding structure, it is directly realized by connection.The outlet of controllable pump 3 is connected with detection pipe 6, in this way, when controllable pump 3 is opened
When, the drilling fluid 11 in mud tube 1 can be drawn into detection pipe 6, the drilling fluid 11 flowed out from detection pipe 6 can enter mud
It starches in pipe 1, so as to flow into drilling fluid pot.
Detection device 7 is set in detection pipe 6, for carrying out magnetic resonance detection to the drilling fluid 11 in detection pipe 6.Inspection
Antenna and magnet can be included by surveying device 7, the structure of antenna and magnet can there are many, as long as nuclear magnetic resonance condition can be met i.e.
It can.The operation principle of detection device 7 is described in detail using magnet as toroidal magnet, antenna are solenoid antenna in the present embodiment,
The principle of other types of magnet and antenna is similar, is repeated no more in the present embodiment.
Fig. 3 is the structure diagram of detection device 7 in nuclear magnetic resonance logging system provided in an embodiment of the present invention.Such as Fig. 3
Shown, magnet in the present embodiment can be toroidal magnet 71, and antenna can be solenoid antenna (not shown), annular magnetic
Body 71 is set in detection pipe 6, and antenna is arranged between magnet and detection pipe 6.The magnetizing direction of toroidal magnet 71 can be week
To magnetizing, N, S in Fig. 3 represent the N poles of magnet and S poles, and the magnetostatic field direction that toroidal magnet 71 generates can polarize drilling fluid
Spin Hydrogen Proton in 11 when solenoid antenna is powered, can be generated for the RF magnetic field of switching spin Hydrogen Proton, solenoid
Antenna stops after being powered, and RF magnetic field disappears, and spin Hydrogen Proton starts that precession occurs along magnetostatic field, so as to generate nuclear magnetic resonance
Inductive signal by detecting nuclear magnetic resonance inductive signal, can analyze strata condition.
Detection device 7 is electrically connected with spectrometer 4, the nuclear magnetic resonance inductive signal detected can be sent to spectrometer 4, spectrometer
The 4 detection signals that can be sent to detection device 7 are analyzed, and the testing result that analysis is obtained passes through radio receiving transmitting module
5 are sent to controller 2.Controller 2 can be arranged far from the position of well head, and staff is facilitated to operate.Controller 2 in addition to
Other than spectrometer 4 is communicated, can also be communicated by radio receiving transmitting module 5 with controllable pump 3, control controllable pump 3 open or
It closes.
Corresponding software can be provided in controller 2, to realize the communication with controllable pump 3 and spectrometer 4, and can be right
The testing result received is handled, further, it is also possible to set the user interface being connected with controller 2, Yong Hujiao
Mutual interface facilitates user to send out control instruction, and check testing result.
Fig. 4 is the work flow diagram of nuclear magnetic resonance logging system provided in an embodiment of the present invention.As shown in figure 4, this implementation
The workflow of nuclear magnetic resonance logging system, can specifically include in example：
Step 101, controller 2 send open command by radio receiving transmitting module 5 to controllable pump 3, so that controllable pump 3 is beaten
It opens, the drilling fluid 11 in mud tube 1 is flowed into detection pipe 6.
After a period of time, controller 2 can control controllable pump 3 close or by controllable pump 3 after a certain time from
It is dynamic to close.After controllable pump 3 is closed, the drilling fluid 11 in detection pipe 6 is static, no longer flows.
Step 102, controller 2 send control command by radio receiving transmitting module 5 to spectrometer 4.
Step 103, spectrometer 4 send pumping signal according to the control command to detection device 7.
Specifically, spectrometer 4 can be electrically connected with the antenna in detection device 7, when spectrometer 4 sends pumping signal to antenna
Afterwards, antenna can generate RF magnetic field, the spin Hydrogen Proton in switching drilling fluid 11.
Step 104, detection device 7 return to detection signal to spectrometer 4.
After spectrometer 4 stops sending pumping signal, RF magnetic field disappears, and spin Hydrogen Proton generates nuclear magnetic resonance sensing letter
Number, antenna can be sent to spectrometer 4 after receiving nuclear magnetic resonance inductive signal.
Testing result is sent to controller 2 by step 105, spectrometer 4 according to the detection signal generation testing result.
Specifically, spectrometer 4 can obtain relevantly according to the oil content of detection signal analysis drilling fluid 11 received
Layer information, and it is sent to controller 2；The detection signal received can also be sent after digital-to-analogue conversion as testing result
To controller 2, testing result is analyzed by controller 2, obtains related formation information.
Nuclear magnetic resonance logging system provided in this embodiment, including the detection pipe 6 connected with mud tube 1, controllable pump 3 into
Mouth is connected with mud tube 1, and outlet is connected with detection pipe 6, and the drilling fluid 11 in mud tube 1 can be drawn into detection pipe 6, is examined
Detection device 7 is arranged in test tube 6, detection device 7 can detect the NMR signal generated in drilling fluid 11, and be sent to
The testing result that analysis obtains is sent to controller 2 by spectrometer 4, spectrometer 4, realizes the real-time detection of drilling fluid 11, step letter
Single, efficiency is higher, and can find the problem in drilling process in time, avoids the occurrence of drilling failure.In addition, controller 2
It is communicated by radio receiving transmitting module 5 with spectrometer 4, controllable pump 3, realizes remote control, it is multiple to overcome wire communication wiring
Miscellaneous and the defects of being difficult to search trouble point of breaking down, enhances the adaptability and stability of nuclear magnetic resonance logging system.
On the basis of the technical solution provided in above-described embodiment, it is preferred that nuclear magnetic resonance logging system can also wrap
It includes：The leadage circuit 10 in parallel with antenna.
Fig. 5 is that leadage circuit 10 and the connection of antenna 103 are shown in nuclear magnetic resonance logging system provided in an embodiment of the present invention
It is intended to.As shown in figure 5, leadage circuit 10 includes the metal-oxide-semiconductor 101 of series connection and resistance 102, the input terminal V of metal-oxide-semiconductor 101inWith spectrometer
4 electrical connections, by changing VinSize can change the on off state of metal-oxide-semiconductor 101.In spectrometer 4 excitation letter is sent to antenna 103
Number when, metal-oxide-semiconductor 101 is off state, and antenna 103 can generate RF magnetic field；Swash when spectrometer 4 stops sending to antenna 103
After encouraging signal, metal-oxide-semiconductor 101 can be opened, the energy stored in antenna of releasing by resistance 102 is prevented because of antenna free damping
Overlong time and flood NMR signal.
On the basis of the technical solution provided in above-described embodiment, it is preferred that nuclear magnetic resonance logging system can also wrap
It includes：The flow sensor being arranged in detection pipe 6；Flow sensor is electrically connected with spectrometer 4, for the flow information that will be detected
It is sent to spectrometer 4.
Nuclear magnetic resonance logging system provided in this embodiment after one-time detection is completed to drilling fluid 11, can be spaced
A period of time is again detected the drilling fluid 11 of now thereof in mud tube 1, therefore, it is desirable to controllable pump 3 is reopened, it will
New drilling fluid 11 in mud tube 1 is drawn into detection pipe 6, while the old drilling fluid 11 in detection pipe 6 is sent to mud
It pipe 1 and then is discharged into drilling fluid pot.
Flow sensor is provided in detection pipe 6, is capable of 11 flow of drilling fluid of detection stream pipe 6 after testing, works as drilling well
When the flow of liquid 11 reaches predetermined threshold value, illustrate that the drilling fluid 11 in detection pipe 6 has all been replaced into new drilling fluid 11, this
When can close controllable pump 3, the drilling fluid 11 in detection pipe 6 is detected, can avoid drilling fluid 11 do not replace just close
Close that controllable pump 3 causes the detection to current drilling fluid inaccurate or drilling fluid 11 has replaced and has also been unlocked controllable pump 3 and causes
It economizes on resources, reduce efficiency.
On the basis of the technical solution provided in above-described embodiment, it is preferred that nuclear magnetic resonance logging system can also wrap
It includes：The temperature sensor being arranged in detection pipe 6；Temperature sensor is electrically connected with spectrometer 4, for the temperature information that will be detected
It is sent to spectrometer 4.
Temperature communication breath is sent to spectrometer 4, spectrometer 4 can be made in the detection signal that analysis and detection device 7 returns, together
Shi Jianli detects signal and the correspondence of 11 temperature of drilling fluid, reflects the information of current drilling fluid 11 to a deeper level.
Above-described embodiment provide technical solution on the basis of, it is preferred that spectrometer 4 include control process circuit 41,
Power amplification circuit 42 and pre-amplification circuit 44.
Fig. 6 is the structure diagram of spectrometer 4 in nuclear magnetic resonance logging system provided in an embodiment of the present invention.As shown in fig. 6,
The input terminal of power amplification circuit 42 is electrically connected with control process circuit 41, and output terminal is electrically connected by first switch 43 with antenna
It connects；The output terminal of pre-amplification circuit 44 is electrically connected with control process circuit 41, and input terminal passes through second switch 45 and antenna electric
Connection.
It is communicated between control process circuit 41 and controller 2 by the realization of radio receiving transmitting module 5.Control process circuit 41 has
Body can be made of programmable chip FPGA and DSP, and wherein FPGA can will be received from controller 2 as control circuit
Control command is sent to power amplification circuit 42 and pre-amplification circuit 44, and DSP can put the past big as processing circuit
Amplified detection signal that circuit 44 receives is further to be handled.
Power amplification circuit 42 can be made of three-stage amplifier, and amplifying circuit is mainly made of metal-oxide-semiconductor, every grade of amplification
By transformer coupled between circuit, the pulse train that can be provided to control process circuit 41 is amplified, and swashing generation
The antenna that signal is sent in detection device 7 is encouraged, also there is the output impedance to match with antenna impedance.
Pre-amplification circuit 44 can be made of second amplifying circuit, be capable of the detection signal of reception antenna transmission, and right
The detection signal amplification about 60dB of microvolt grade, makes the electric signal that can be identified by control processing circuit 41, preposition amplification
Circuit 44 can be placed in shielding box to obstruct external interference.
First switch 43 and second switch 45 are switched on or off being controlled by control process circuit 41, when first switch 43
Open, second switch 45 turn off when, control process circuit 41 can by power amplification circuit 42 to detection device 7 send encourage
Signal, when first switch 43 turns off, second switch 45 is opened, control process circuit 41 can be connect by pre-amplification circuit 44
It receives detection device 7 and sends detection signal.First switch 43 and second switch 45 can play buffer action, prevent antenna with it is preposition
Amplifying circuit 44 is influenced when being connected by the noise from power amplification circuit 42.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe is described in detail the present invention with reference to foregoing embodiments, it will be understood by those of ordinary skill in the art that：Its according to
Can so modify to the technical solution recorded in foregoing embodiments either to which part or all technical features into
Row equivalent replacement；And these modifications or replacement, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (5)
1. a kind of nuclear magnetic resonance logging system, which is characterized in that including：Mud tube, controller, controllable pump, spectrometer, wireless receiving and dispatching
Module, detection pipe and detection device；
For the mud tube for extracting down-hole drilling fluids, underground, the other end and drilling fluid pot phase are stretched into one end of the mud tube
Even；
One end of the detection pipe is connected with the mud tube, the outlet of the other end and the controllable pump, the controllable pump
Import connected with the mud tube；
The detection device is arranged in the detection pipe, the detection device is connected with the spectrometer；
The spectrometer and the controllable pump are communicated by the radio receiving transmitting module with the controller；
Wherein, the controller is used to send open command to the controllable pump, and control command is sent, and receive to the spectrometer
The testing result that the spectrometer is sent；
The controllable pump is used to take out the drilling fluid in the mud tube after the open command for receiving the controller transmission
It gets in the detection pipe；
The spectrometer is used to send pumping signal to the detection device after the control command for receiving the controller transmission,
And receive the detection signal that the detection device is returned according to the pumping signal, according to the detection signal generation testing result
It is sent to the controller；
The detection device includes antenna and toroidal magnet, and the toroidal magnet is set in the detection pipe, and the antenna is set
It puts between the magnet and the detection pipe；
It further includes：The leadage circuit in parallel with the antenna；
The leadage circuit includes the metal-oxide-semiconductor and resistance of series connection, and the input terminal of the metal-oxide-semiconductor is electrically connected with the spectrometer；
Flow sensor is additionally provided in the detection pipe；
The flow sensor is electrically connected with the spectrometer, for the flow information detected to be sent to the spectrometer；
When the flow of the drilling fluid reaches predetermined threshold value, the controllable pump is closed, to the drilling well in the detection pipe
Liquid is detected.
2. nuclear magnetic resonance logging system according to claim 1, which is characterized in that the magnetizing direction of the magnet is axis
To the antenna is solenoid antenna.
3. nuclear magnetic resonance logging system according to claim 1, which is characterized in that further include：It is arranged on the detection pipe
In temperature sensor；
The temperature sensor is electrically connected with the spectrometer, for the temperature information detected to be sent to the spectrometer.
4. nuclear magnetic resonance logging system according to claim 1, which is characterized in that the spectrometer includes control process circuit
And power amplification circuit；
It is communicated between the control process circuit and the controller by radio receiving transmitting module realization；
The input terminal of the power amplification circuit is electrically connected with the control process circuit, output terminal by first switch with it is described
Antenna is electrically connected.
5. nuclear magnetic resonance logging system according to claim 4, which is characterized in that the spectrometer further includes preposition amplification electricity
Road；
The output terminal of the pre-amplification circuit is electrically connected with the control process circuit, input terminal by second switch with it is described
Antenna is electrically connected.
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| CN105275465B true CN105275465B (en) | 2018-06-19 |
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| WO1998057030A1 (en) * | 1997-06-09 | 1998-12-17 | Baker Hughes Incorporated | Control and monitoring system for chemical treatment of an oilfield well |
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| CN102608145B (en) * | 2012-03-14 | 2015-02-04 | 中国石油大学(北京) | Nuclear magnetic resonance analyzer and slide table thereof |
| CN105207665B (en) * | 2015-09-23 | 2017-11-14 | 中国石油大学(北京) | Metal-oxide-semiconductor drive-type isolates leadage circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998057030A1 (en) * | 1997-06-09 | 1998-12-17 | Baker Hughes Incorporated | Control and monitoring system for chemical treatment of an oilfield well |
| CN201184199Y (en) * | 2008-03-11 | 2009-01-21 | 大港油田集团有限责任公司 | Petroleum engineering drilling fluid electric conductivity wireless sensing device |
| CN101832129A (en) * | 2009-03-10 | 2010-09-15 | 北京环鼎科技有限责任公司 | Downhole manual radioactive reservoir fluid analyzer |
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| CN105275465A (en) | 2016-01-27 |
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