CN207218652U - The computing device of Pump Impulse Noise fundamental frequency in well logging - Google Patents
The computing device of Pump Impulse Noise fundamental frequency in well logging Download PDFInfo
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- CN207218652U CN207218652U CN201721031020.0U CN201721031020U CN207218652U CN 207218652 U CN207218652 U CN 207218652U CN 201721031020 U CN201721031020 U CN 201721031020U CN 207218652 U CN207218652 U CN 207218652U
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Abstract
The utility model provides the computing device of Pump Impulse Noise fundamental frequency in well logging, its device includes pressure sensor, pump rush sensor, data processing equipment, impulse generator and inserting tube, pump rush sensor is arranged on the slush pump of drilling facilities, pressure sensor is arranged on the hydraulic fill pipeline of well head, and impulse generator and inserting tube are respectively positioned in the drill string of drilling facilities；Inserting tube detects the measurement signal in drilling process and it is encoded, measurement signal after coding is converted to pressure pulse signal by impulse generator, pressure pulse signal is transferred to pressure sensor along the hydraulic fill pipeline of drilling facilities, pressure sensor is input to data processing equipment after pressure pulse signal is gathered into electric signal, and data processing equipment is handled electric signal and calculates Pump Impulse Noise fundamental frequency.The utility model calculates Pump Impulse Noise fundamental frequency, is easy to the characteristic of follow-up study Pump Impulse Noise and eliminates the interference of Pump Impulse Noise signal, avoids distorted signals.
Description
Technical field
Logging while drilling technology is the utility model is related to, the calculating dress of Pump Impulse Noise fundamental frequency specially in well logging
Put.
Background technology
Wireless drilling well logging is a kind of current logging mode most widely used in the world, its can while drilling well,
The series of parameters such as geologic parameter, well track parameter are obtained in real time, and are depicted as various types of logs, in next step
Work is prepared.
Fig. 1 illustrates the operation in conventional drilling facility, as follows：Using one or more slush pumps 12 by mud 10
Extracted out from mud pit 11, slush pump used is typically Piston Reciprocating Pump.Mud 10 reaches drill string 14 by mud line 13,
After drill string 14 reaches drill bit 15, earth's surface 31 is returned to by the annular space 16 between drilling rod and open hole wall 29.After returning to earth's surface 31,
Mud returns to mud pit 11 by pipeline 17, and rock drilling cuttings or the precipitation of other chips are completed in mud pit, so far completes one
Secondary circulation, restart next circulation.
One bottom pressure pulse equipment 18 is integrated in drill string to be obtained with transmitting in drilling process by measuring instrument 19
Data-signal.Bottom pressure pulse equipment 18 is a valve or reducing hole, can be produced by adjusting mud speed rate
Pressure pulse.Underground equipment passes through the data-signal control pressure pulsing unit valve or variable of coding to data signals
Aperture hole size, so as to produce the pressure pulse for carrying measurement data in slurry liquid.Arrow 21,22 and 23 illustrates underground
The route of transmission of the caused pulse signal under the conditions of conventional well of signalling arrangement 18.Slush pump 12 is same in mud line 13
Pressure pulse can be produced, this is identified in figure by arrow 24,25,26 and 26A, and wherein 26A equally identifies mud in annular space 16
In flowing.
In order to realize the correct explanation of bottom pressure pulse, it should which the frequency that Pump Impulse Noise is calculated by some way is special
Property, and then according to the interference of the frequency characteristic of Pump Impulse Noise elimination Pump Impulse Noise signal.
The content of the invention
In order to solve the problems of prior art, the utility model provides Pump Impulse Noise fundamental frequency in well logging
Computing device, be easy to follow-up study Pump Impulse Noise characteristic and eliminate Pump Impulse Noise signal interference, avoid distorted signals.
The computing device of Pump Impulse Noise fundamental frequency in the utility model well logging, including pressure sensor, pump impulse pass
Sensor, data processing equipment, impulse generator and inserting tube, pump rush sensor are arranged on the slush pump of drilling facilities, and pressure passes
Sensor is arranged on the hydraulic fill pipeline of well head, and impulse generator and inserting tube are respectively positioned in the drill string of drilling facilities, and data processing is set
Back-up is not connected with pump rush sensor, pressure sensor, and inserting tube is connected with impulse generator；Survey in inserting tube detection drilling process
Signal is measured, and measurement signal is encoded, the measurement signal after coding is converted to pressure pulse signal by impulse generator, pressure
Hydraulic fill pipeline of the power pulse signal along drilling facilities is transferred to pressure sensor, and pressure sensor gathers pressure pulse signal
Data processing equipment is input to after into electric signal, data processing equipment is handled electric signal and calculates Pump Impulse Noise fundamental wave
Frequency.
Preferably, the data processing equipment includes capture card and decoder module, and capture card is carried out to the electric signal of input
A/D is changed, and then exports to decoder module, data are decoded by decoder module.
Preferably, the data processing equipment carries out low-pass filtering treatment to electric signal.
Compared with prior art, the utility model has the advantages that：Principle is produced according to Pump Impulse Noise, used
Mud pumping cylinder number, the relation between piston stroke frequency (piston stroke number/per minute), calculate Pump Impulse Noise fundamental wave frequency
Rate, it is easy to the characteristic of follow-up study Pump Impulse Noise and eliminates the interference of Pump Impulse Noise signal, avoid distorted signals.
Brief description of the drawings
Fig. 1 is the operation schematic diagram in conventional drilling facility；
Fig. 2 is the structured flowchart of the utility model computing device；
Fig. 3 is primary signal time-domain diagram；
Fig. 4 is primary signal frequency domain figure；
Fig. 5 is pump stroke signal time-domain diagram.
Embodiment
The utility model is further described below in conjunction with embodiment and accompanying drawing, but embodiment of the present utility model
Not limited to this.
The utility model sets the computing device 30 of Pump Impulse Noise fundamental frequency in Fig. 1；Such as Fig. 2, computing device 30 wraps
Pressure sensor 32, pump rush sensor 34, data processing equipment 36, impulse generator and inserting tube are included, pump rush sensor 34 is set
On the slush pump 12 of drilling facilities, pressure sensor is arranged on the mud line of well head, impulse generator and the equal position of inserting tube
In the drill string of drilling facilities.Measurement signal in inserting tube detection drilling process, and measurement signal is encoded, pulse generation
Measurement signal after coding is converted to pressure pulse signal by device, and pressure pulse signal is transferred to pressure sensing along hydraulic fill pipeline
Device, pressure sensor gather pressure pulse signal into after electric signal, are input to data processing equipment；Data processing equipment can be with
Using computer or processor, including capture card and decoder module, capture card carries out A/D conversions to the electric signal of input, then
Output is decoded to decoder module by decoder module to data.Data processing equipment carries out LPF etc. to electric signal
Reason, and calculate Pump Impulse Noise fundamental frequency.
The generation of measurement signal in drilling process, transmission and receive process are as follows：Wireless drilling logging system passes through
Inserting tube gathers required measurement signal, then these measurement signals are encoded according to coding rule, afterwards impulse generator (arteries and veins
Rush device) produce corresponding pulse signal；These are contained the pulse signal transmission of well logging information to well head, well head by hydraulic fill pipeline again
Pressure sensor pressure signal is converted to electric signal, and be transmitted to capture card, after capture card carries out analog-to-digital conversion to electric signal,
Decoded and follow-up calculating.The signal transmitted by hydraulic fill pipeline not only includes the useful logging signal transmitted, also
Including pressure pulse (i.e. Pump Impulse Noise) caused by slush pump compression mud, and pressure wave caused by other various plant equipment
Moving noise and random noise etc., these noises are referred to as ambient noise.Drilling well signal is disturbed by ambient noise, increases error code
Rate, influence the accuracy of data decoding.Generally, due to which Pump Impulse Noise and the frequency of signal approach, both blend together,
Easily signal is interfered when eliminating Pump Impulse Noise, causes distorted signals.
The utility model produces principle, used mud pumping cylinder number, (the piston punching of piston stroke frequency according to Pump Impulse Noise
Journey number/per minute) between relation, calculate Pump Impulse Noise fundamental frequency；Computational methods comprise the following steps：
1st, ambient noise is filtered with FIR low pass filter, wherein, the FIR low pass filter arrange parameter
Including filter type, sample frequency, stopband and band connection frequency, ripple factor；
2nd, according to the generation principle (pressure pulse caused by slush pump compression mud) of Pump Impulse Noise, and Pump Impulse Noise frequency
Rate is with using the relation of slush pump pump number, single cylinder piston stroke frequency (piston stroke number/per minute) to calculate Pump Impulse Noise
Fundamental frequency, the formula of use is as follows：
Fn=SPM*n/60
Wherein, Fn is the fundamental frequency of Pump Impulse Noise, and SPM is single cylinder piston stroke frequency (single cylinder piston stroke number/every
Minute), n is cylinder number, when using twin cylinder pump, n=2；When using three cylinder pump, n=3.
3rd, single cylinder piston stroke frequency is measured by the pump rush sensor 34 shown in Fig. 1, data processing equipment is according to step 2
The formula is solved, and obtains the fundamental frequency of Pump Impulse Noise.Pump rush sensor is substantially a two-wire system proximity switch
Formula sensor, there is a hertz oscilltor in sensor internal, when metal object (piston) is remote, oscillator starting of oscillation, vibration
Device power consumption is more, sensor internal Schmidt circuit output low level；When metal object (piston) is close, oscillator vibration subtracts
Weak not even starting of oscillation, oscillator power consumption is few, sensor internal Schmidt circuit output high level.The utility model senses pump impulse
Device 34 is arranged on the shield of slush pump, and single cylinder piston stroke frequency can be measured according to the frequency of sensor output level.
4th, single cylinder piston stroke frequency not often measures a value, data processing equipment by pump rush sensor in step 2
With regard to updating once, but use and often measure the method for several pulses renewal once, the more new formula of single cylinder piston stroke frequency
It is as follows：
Wherein, FavgRepresent the single cylinder piston stroke frequency being calculated, Fold.avgRepresent a single cylinder being calculated
Piston stroke frequency, FnewThe single cylinder piston stroke frequency this time measured by pump rush sensor is represented, α was represented per α pulse week
Phase updates once, and α span is 1~9.Single cylinder piston stroke frequency is calculated by average weighted mode, α values
Bigger, renewal is slower, and the weight shared by old frequency values is big, and α values are smaller, and renewal is faster, and the weight that old frequency values account for is got over
It is small.α value generally takes α=9.
The primary signal collected is as shown in figure 3, carried out Fourier transformation, and gained spectrogram is as shown in figure 4, by scheming
4 is visible, in 2.5~3Hz frequency range, two larger pulses of amplitude be present, in 0~1Hz frequency ranges there is also
The larger pulse of two amplitudes, Fig. 5 are the pump stroke signal collected in 30 seconds, as shown in Figure 5 the stroke frequency of used slush pump
Rate is 59 (SPM), and used slush pump is three cylinder pump.According to above-mentioned steps, the frequency that can be calculated Pump Impulse Noise is about
3Hz, it is real Pump Impulse Noise that thus can confirm the 3Hz pulses shown in primary signal frequency domain figure.
As described above, it can preferably realize the utility model.
Claims (5)
1. the computing device of Pump Impulse Noise fundamental frequency in well logging, it is characterised in that sensed including pressure sensor, pump impulse
Device, data processing equipment, impulse generator and inserting tube, pump rush sensor are arranged on the slush pump of drilling facilities, pressure sensing
Device is arranged on the hydraulic fill pipeline of well head, and impulse generator and inserting tube are respectively positioned in the drill string of drilling facilities, data processing equipment
It is connected respectively with pump rush sensor, pressure sensor, inserting tube is connected with impulse generator；Measurement in inserting tube detection drilling process
Signal, and measurement signal is encoded, the measurement signal after coding is converted to pressure pulse signal, pressure by impulse generator
Hydraulic fill pipeline of the pulse signal along drilling facilities is transferred to pressure sensor, pressure sensor by pressure pulse signal gather into
Data processing equipment is input to after electric signal, data processing equipment is handled electric signal and calculates Pump Impulse Noise fundamental wave frequency
Rate.
2. the computing device of Pump Impulse Noise fundamental frequency in well logging according to claim 1, it is characterised in that described
Data processing equipment includes capture card and decoder module, and capture card carries out A/D conversions to the electric signal of input, then output to solution
Data are decoded by code module by decoder module.
3. the computing device of Pump Impulse Noise fundamental frequency in well logging according to claim 1, it is characterised in that described
Data processing equipment is computer or processor.
4. the computing device of Pump Impulse Noise fundamental frequency in well logging according to claim 1, it is characterised in that described
Data processing equipment carries out low-pass filtering treatment to electric signal.
5. the computing device of Pump Impulse Noise fundamental frequency in well logging according to claim 1, it is characterised in that described
Pump rush sensor is arranged on the shield of slush pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721031020.0U CN207218652U (en) | 2017-08-17 | 2017-08-17 | The computing device of Pump Impulse Noise fundamental frequency in well logging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721031020.0U CN207218652U (en) | 2017-08-17 | 2017-08-17 | The computing device of Pump Impulse Noise fundamental frequency in well logging |
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| Publication Number | Publication Date |
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| CN207218652U true CN207218652U (en) | 2018-04-10 |
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| CN201721031020.0U Active CN207218652U (en) | 2017-08-17 | 2017-08-17 | The computing device of Pump Impulse Noise fundamental frequency in well logging |
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2017
- 2017-08-17 CN CN201721031020.0U patent/CN207218652U/en active Active
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