CN110454154A - A kind of correction wellbore bias is to the method and device of orientation effect of signals - Google Patents
A kind of correction wellbore bias is to the method and device of orientation effect of signals Download PDFInfo
- Publication number
- CN110454154A CN110454154A CN201910777451.9A CN201910777451A CN110454154A CN 110454154 A CN110454154 A CN 110454154A CN 201910777451 A CN201910777451 A CN 201910777451A CN 110454154 A CN110454154 A CN 110454154A
- Authority
- CN
- China
- Prior art keywords
- signal
- orientation
- wellbore
- antenna
- axial
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
Abstract
The invention discloses a kind of correction wellbore bias to the method and device of orientation effect of signals, the described method includes: in the wellbore threedimensional model on uniform stratum, acquisition axially receives the corresponding axial signal of antenna, the corresponding first orientation signal of first orientation receiving antenna and the corresponding second orientation signal of second orientation receiving antenna；The multinomial of signal relation is indicated based on the axial signal, first orientation signal and the building of second orientation signal；The received axial measured signal of antenna is axially received according in multinomial and the wellbore, is obtained to the eccentric corrected correction coefficient of wellbore；Borehole wall reflection signal is eliminated when eccentric in the wellbore to the instrument during actual measurement according to correction coefficient, obtains the third bearing signal of characterization stratigraphic boundary distance.The present invention has comprehensively considered the influence factor of formation conductivity when eliminating wellbore Influence from Eccentric, more thorough to the inhibition of wellbore Influence from Eccentric, and stratigraphic boundary distance can finally be determined more accurately.
Description
Technical field
The present invention relates to petroleum, technical field of geological exploration more particularly to a kind of correction wellbore bias to bearing signal shadow
Loud method and device.
Background technique
It is used at present with bore orientation electromagnetic wave resistivity instrument mainly include transmitting antenna and receiving antenna, using mirror image
Method is analyzed.Letter when instrument is located at uniform stratum, due to emitting the orthogonality with receiving coil, in orientation receiving coil
Number be 0.When instrument is located in stratified formations, receiving coil can receive the reflection signal from stratigraphic boundary.But work as instrument
When device is eccentric in the wellbore, the electromagnetic wave of different directions borehole wall reflection can not be offset because unequal, be made in orientation receiving coil
The response for receiving wellbore bias is added on the reflection signal from stratigraphic boundary of our care, interferes us to stratum
The judgement on boundary.
Existing settling mode is that the influence using fixed correction coefficient to wellbore bias is corrected, i.e., existing scheme is recognized
For close, distant place position receiving antenna signal than between reception and transmission range there are fixed relationships, and by the fixed relationship to well
The eccentric influence generated of eye is modified.But discovery is using the fixed correction coefficient to the shadow of wellbore bias in practical applications
It rings calibration result to be extremely limited, is appointed using this method large effect so is generated to the judgement of stratigraphic boundary after calibration.
Summary of the invention
In view of the above problems, the invention proposes a kind of correction wellbore bias to the method and device of orientation effect of signals,
The corrected parameter of acquisition is to obtain after having comprehensively considered the distance of stratigraphic boundary and the formation conductivity of bed boundary two sides
Parameter can carry out more accurately amendment to the influence that wellbore bias generates.
In a first aspect, the application is provided the following technical solutions by an embodiment:
A method of correction wellbore bias is to orientation effect of signals, which comprises
In the wellbore threedimensional model on uniform stratum, acquisition axially receives the corresponding axial signal of antenna, and first orientation connects
Receive the corresponding first orientation signal of antenna and the corresponding second orientation signal of second orientation receiving antenna；Wherein, the axial direction
Receiving antenna, the first orientation receiving antenna and the second orientation receiving antenna are with brill orientation electromagnetic wave resistivity
The antenna of device；Signal relation is indicated based on the axial signal, the first orientation signal and second orientation signal building
Multinomial；Wherein, signal ratio of the signal relation between the first orientation signal and the second orientation signal
With the relationship of the axial signal；It is received axial real that antenna is axially received according in the multinomial and the wellbore
Signal is surveyed, is obtained to the eccentric corrected correction coefficient of wellbore；Existed according to the correction coefficient to the instrument during actual measurement
Borehole wall reflection signal is eliminated when eccentric in wellbore, obtains the third bearing signal of characterization stratigraphic boundary distance.
Preferably, the acquisition axially receives the corresponding axial signal of antenna, first orientation receiving antenna corresponding first
Bearing signal and the corresponding second orientation signal of second orientation receiving antenna, comprising:
Obtain the parameter information of the wellbore；Information based on the parameter constructs the wellbore threedimensional model；Based on described
Wellbore threedimensional model carries out numerical simulation, obtains the axial signal, the first orientation signal and the second orientation signal.
Preferably, the multinomial are as follows:Wherein, aiIt is polynomial
Coefficient, i value arrive n, V for 0zzFor the axial signal under uniform stratum, Vzx1For the first orientation signal under uniform stratum, Vzx2For
Second orientation signal under uniform stratum.
Preferably, described that the received axial actual measurement of antenna is axially received according in the multinomial and the wellbore
Signal is obtained to the eccentric corrected correction coefficient of wellbore, comprising:
Based on the axial signal, the first orientation signal and the second orientation signal, the multinomial is carried out
Data fitting, determines the polynomial multinomial coefficient；According to the axial direction in the multinomial coefficient and the wellbore
The received axial measured signal of receiving antenna, obtains to the eccentric corrected correction coefficient of wellbore.
Preferably, the borehole wall is reflected when described eccentric in the wellbore to the instrument during actual measurement according to the correction coefficient
Signal is eliminated, and the third bearing signal of characterization stratigraphic boundary distance is obtained, comprising:
Based on V 'zx=V 'zx1-AV′zx2, obtain the third bearing signal of characterization stratigraphic boundary distance；Wherein, V'zxIt is
Three-bearing signal, V'zx1For the first orientation measured signal that first orientation receiving antenna measures under actual condition, V'zx2
For the second orientation measured signal that second orientation receiving antenna measures under actual condition, A is correction coefficient.
Second aspect, based on the same inventive concept, the application are provided the following technical solutions by an embodiment:
To the device of orientation effect of signals, described device includes: for a kind of correction wellbore bias
Analog parameter obtains module, in the wellbore threedimensional model on uniform stratum, it is corresponding that acquisition axially receives antenna
Axial signal, the corresponding first orientation signal of first orientation receiving antenna and second orientation receiving antenna corresponding second
Bearing signal；Wherein, axially receiving antenna, first orientation receiving antenna and second orientation receiving antenna is with brill orientation electromagnetism
The antenna of wave resistivity instrument；Signal relation constructs module, for based on the axial signal, the first orientation signal and institute
Stating the building of second orientation signal indicates the multinomial of signal relation；Wherein, the signal relation be the first orientation signal with
The relationship of signal ratio and the axial signal between the second orientation signal；Correction coefficient obtains module, is used for basis
The received axial measured signal of antenna is axially received described in the multinomial and the wellbore, obtains and wellbore bias is carried out
The correction coefficient of correction；Correction module, for it is eccentric in the wellbore to the instrument during actual measurement according to the correction coefficient when
Borehole wall reflection signal is eliminated, the third bearing signal of characterization stratigraphic boundary distance is obtained.
Preferably, the analog parameter obtains module, is also used to:
Obtain the parameter information of the wellbore；Information based on the parameter constructs the wellbore threedimensional model；Based on described
Wellbore threedimensional model carries out numerical simulation, obtains the axial signal, the first orientation signal and the second orientation signal.
Preferably, the correction coefficient obtains module, is specifically used for:
Based on the axial signal, the first orientation signal and the second orientation signal, the multinomial is carried out
Data fitting, determines the polynomial multinomial coefficient；According to the axial direction in the multinomial coefficient and the wellbore
The received axial measured signal of receiving antenna, obtains to the eccentric corrected correction coefficient of wellbore.
Preferably, the correction module, is specifically used for:
Based on V 'zx=V 'zx1-AV′zx2, obtain the third bearing signal of characterization stratigraphic boundary distance；Wherein, V'zxIt is
Three-bearing signal, V'zx1For the first orientation measured signal that first orientation receiving antenna measures under actual condition, V'zx2
For the second orientation measured signal that second orientation receiving antenna measures under actual condition, A is correction coefficient.
The third aspect, based on the same inventive concept, the application are provided the following technical solutions by an embodiment:
A kind of computer readable storage medium, is stored thereon with computer program, realization when which is executed by processor
The step of any one of first aspect the method.
The embodiment of the present invention provides a kind of correction wellbore bias to the method for orientation effect of signals, and this method passes through in numerical value
Influence of the formation conductivity to correction parameter is introduced in the case where simulation, and axially receives the corresponding axial direction of antenna in use
Receive signal influences brought by formation conductivity to characterize；Further, by constructing about first orientation signal and second
The multinomial of relationship between signal ratio between bearing signal and axial signal confirms correction coefficient, the school obtained with this
Positive coefficient is to consider formation conductivity to influence correction coefficient；Finally, can be by the correction coefficient to the wellbore during actual measurement
The borehole wall reflection signal eliminated, so that it may obtain characterization stratigraphic boundary distance third bearing signal, the third bearing signal
It is more accurate, it is smaller by wellbore Influence from Eccentric.To sum up, the present invention has comprehensively considered stratum conductance when eliminating wellbore Influence from Eccentric
The influence factor of rate, it is more thorough to the inhibition of wellbore Influence from Eccentric, stratigraphic boundary distance can finally be determined more accurately.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 shows a kind of correction wellbore bias of first embodiment of the invention offer to the method for orientation effect of signals
Flow chart；
Fig. 2 shows in first embodiment of the invention with boring orientation electromagnetic wave resistivity instrument antenna structure and signal transmitting and receiving
Schematic illustration；
Fig. 3 shows in first embodiment of the invention axial receiving antenna in wellbore threedimensional model under the conditions of different parameters
Phase response；
Fig. 4 is shown using Simulation the method for the present invention in different environments, solid part signal and void after correction
Contrast schematic diagram before and after portion's signal correction；
Fig. 5 is shown using the existing bearing calibration of Simulation in different environments, the solid part signal after correction and
The contrast schematic diagram of imaginary signals correction front and back；
Fig. 6 shows a kind of correction wellbore bias of second embodiment of the invention offer to the device of orientation effect of signals
Functional block diagram.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
Influence of the formation conductivity to calibration result is not accounted in the correction of existing wellbore eccentricity effect, however,
By a large amount of Three dimensional finite difference method, to instrument, eccentric situation carries out modeling Simulation in the wellbore, finds existing fixation
The bearing calibration of coefficient cannot meet the wellbore eccentric correction of different models simultaneously.Mud is found by a large amount of comparative experiments analysis
Influence of the slurry resistivity to calibration result is limited, and in addition different formation conductivities can generate obvious shadow to calibration result
It rings.And existing fixed correction coefficient does not consider the influence of formation conductivity.Therefore in the present invention relative to existing
For technology, influence of the formation conductivity to wellbore eccentric correction has been comprehensively considered, and finally determine correction coefficient.
Different ground environments corresponds to different formation conductivities, in the present embodiment, can be by acquisition with brill orientation
Electromagnetic wave resistivity instrument axially receives antenna received signal to reflect formation conductivity.Further instruction please refers to
Following embodiments.
First embodiment
Referring to Fig. 1, providing a kind of method for correcting wellbore bias to orientation effect of signals, the side in the present embodiment
Method includes:
Step S10: in the wellbore threedimensional model on uniform stratum, acquisition axially receives the corresponding axial signal of antenna, the
The corresponding first orientation signal of one orientation receiving antenna and the corresponding second orientation signal of second orientation receiving antenna；Wherein,
Antenna, the first orientation receiving antenna and the second orientation receiving antenna of axially receiving is with brill orientation electromagnetic wave
The antenna of resistivity instrument；
Step S20: letter is indicated based on the axial signal, the first orientation signal and second orientation signal building
The multinomial of number relationship；Wherein, letter of the signal relation between the first orientation signal and the second orientation signal
The relationship of number ratio and the axial signal；
Step S30: the received axial actual measurement of antenna is axially received according in the multinomial and the wellbore and is believed
Number, it obtains to the eccentric corrected correction coefficient of wellbore；
Step S40: the borehole wall is reflected when eccentric in the wellbore to the instrument during actual measurement according to the correction coefficient and is believed
It number is eliminated, obtains the third bearing signal of characterization stratigraphic boundary distance.
In step slo, antenna is axially received, is had in first orientation receiving antenna and second orientation receiving antenna
There is receiving coil.
Each each signal received is the reflected signal of the borehole wall by wellbore in uniform stratum, is not present
The signal of stratigraphic boundary reflection, therefore can targetedly be eliminated.Specifically, the corresponding axial signal of antenna is axially received,
The corresponding first orientation signal of first orientation receiving antenna and the corresponding second orientation signal of second orientation receiving antenna.Please
Referring to Fig.2, Fig. 2 is with brill orientation electromagnetic wave resistivity instrument antenna structure and signal transmitting and receiving schematic illustration, wherein T1For hair
Penetrate antenna, Rz1To axially receive antenna, Rx1、Rx2For orientation receiving antenna.
The basic functional principle of orientation electromagnetic wave instrument can be used image method and be analyzed, when instrument is located at uniform stratum
When, due to the orthogonality of transmitting and receiving coil, orientation receiving coil (first orientation receiving antenna, second orientation receive all over the world,
Signal in similarly hereinafter) is 0；When instrument is located in stratified formations, receiving coil can receive the letter of the reflection from stratigraphic boundary
Number.But can also be generated in orientation receiving coil when due to instrument bias be not 0 signal, due in uniform stratum, no
With the signal for considering stratigraphic boundary reflection, it is only necessary to be eliminated to the borehole wall reflection signal of wellbore, i.e., on uniform stratum
Signal in rhumb line circle not for 0 is eliminated when middle.
In step slo, the building of wellbore threedimensional model includes the following steps:
Step S11: the parameter information of the wellbore is obtained.Specifically, providing the parameter of two wellbores in the present embodiment
Examples of information, specially model 1 and model 2:
1. three-dimensional modeling model parameter of table
| Model parameter | Model 1 | Model 2 |
| Drill collar radius | 0.085725m | 0.085725m |
| Wellbore radius | 0.12m | 0.12m |
| Long transmitting-receiving away from | 1.8288m | 1.8288m |
| It is short transmitting-receiving away from | 1.27m | 1.27m |
| Frequency | 400kHz | 400kHz |
| Transmitting coil the number of turns | 1 | 1 |
| Receiving coil the number of turns | 1 | 1 |
| Transmitting coil electric current | 1A | 1A |
| Mud resistivity | 100Ω·m | 1Ω·m |
| Formation conductivity | 1Ω·m | 100Ω·m |
| Eccentricity | 0.01m、0.03m | 0.01m、0.03m |
Step S12: information based on the parameter constructs the wellbore threedimensional model.
Step S13: carrying out numerical simulation based on the wellbore threedimensional model, obtains the axial signal, the first party
Position signal and the second orientation signal.
In step s 13, the mode of numerical simulation can are as follows: finite difference method；In addition, can also be FInite Element, limited
The existing methods such as volumetric method also repeat no more with no restriction.
Step S20: letter is indicated based on the axial signal, the first orientation signal and second orientation signal building
The multinomial of number relationship；Wherein, letter of the signal relation between the first orientation signal and the second orientation signal
The relationship of number ratio and the axial signal.
In step S20, sunykatuib analysis is carried out to axial signal, can learn response and the stratum electricity of conventional axial coil
Conductance is directly related and eccentric with wellbore and mud conductivity is substantially unrelated, as shown in figure 3, Fig. 3, which is shown, axially receives antenna
Phase response in wellbore threedimensional model under the conditions of different parameters.Meanwhile the long and short ratio received and dispatched and responded away from signal is investigatedV is responded with coil is axially receivedzzRelationship, wherein Vzx1For the first orientation receiving antenna under uniform stratum corresponding
One bearing signal, Vzx2For the corresponding second orientation signal of second orientation receiving antenna under uniform stratum, VzzFor under uniform stratum
Axial signal.The reflection that the reason of influencing in view of wellbore bias on orientation antenna response is electromagnetic wave on the borehole wall, and it is electric
The reflection of magnetic wave depends mainly on the size of the stratum media of interface two sides.It is known that the single-shot list of axial antenna receives phase tool
There is most shallow investigation depth, can most reflect the formation conductivity near the borehole wall, therefore is used in the present embodiment and axially receive coil sound
Answer VzzSignal as characterization formation conductivity.
Further, multinomial can be constructed in the present embodiment receives and dispatches the ratio responded away from signal so that determination is long and shortWith
Axially receive coil response VzzBetween relationship, quadratic polynomial, cubic polynomial, four can be used in multinomial in the present embodiment
Order polynomial etc., polynomial number and item number are with no restriction namely multinomial can are as follows:Wherein, aiFor polynomial coefficient, i value arrives n, V for 0zzFor equably
Axial signal under layer, Vzx1For the first orientation signal under uniform stratum, Vzx2For the second orientation signal under uniform stratum.
It can specifically be attempted according to actual working conditions to confirm effect.It is carried out by taking quadratic polynomial as an example in the present embodiment detailed
It is thin to illustrate, specific as follows:
Wherein, a, b, c are polynomial coefficient, VzzFor the axial direction under uniform stratum
Signal, Vzx1For the first orientation signal under uniform stratum, Vzx2For the second orientation signal under uniform stratum.Pass throughCan indicate formation conductivity withBetween relationship, it is seen that pass through VzzAmendment to wellbore bias
Introduce the influence of formation conductivity.
Step S30: the received axial actual measurement of antenna is axially received according in the multinomial and the wellbore and is believed
Number, it obtains to the eccentric corrected correction coefficient of wellbore.
In step s 30, specific implementation includes the following steps:
Step S31: based on the axial signal, the first orientation signal and the second orientation signal, to described more
Item formula carries out data fitting, determines the polynomial multinomial coefficient.Wherein, the axial signal, first orientation letter
It number can be obtained by the numerical simulation in the wellbore threedimensional model on uniform stratum with the second orientation signal.It is quasi- to carry out data
Least square method can be used when conjunction, finally can determine polynomial each coefficient, as determine quadratic polynomial in coefficient a, b,
c。
Step S32: it is received axial real that antenna is axially received according in the multinomial coefficient and the wellbore
Signal is surveyed, is obtained to the eccentric corrected correction coefficient of wellbore.Wherein, with above-mentioned For
Example, correction coefficientWherein A is correction coefficient.
Step S40: the borehole wall is reflected when eccentric in the wellbore to the instrument during actual measurement according to the correction coefficient and is believed
It number is eliminated, obtains the third bearing signal of characterization stratigraphic boundary distance.
In step s 40, due to having determined that correction coefficient, and the borehole wall of wellbore can be reflected by correction coefficient
Signal (borehole wall reflection signal can not complete cancel themselves) is eliminated, final to obtain third bearing signal.That is, in actual brill
V ' can be based on during well measurementszx=V 'zx1-AV′zx2, obtain the third bearing signal of characterization stratigraphic boundary distance.Wherein, A is
Correction coefficient, V'zxFor third bearing signal, it can be used for characterizing the distance between wellbore and stratigraphic boundary, V'zx1For first orientation
The first orientation measured signal that receiving antenna measures under actual condition, V'zx2It is second orientation receiving antenna in practical work
The second orientation measured signal measured under condition.The third bearing signal V ' finally obtainedzxTo combine formation conductivity pair
The bearing signal obtained after the eccentric influence correction of wellbore, can more accurately react the distance of stratigraphic boundary.
Simplation verification is carried out in stratified formations to method provided in this embodiment to building model 3, model 3 is water
Horizontal well model.
2 model of table, 3 parameter
At model 3, response of the instrument in eccentric wellbore is as shown in Figure 4.Mud resistivity R is used hereinm=
1000 Ω m, the correction coefficient that uniform stratum calculates are corrected.From in Fig. 4 it will be seen that under conditions of model 3, warp
The bearing signal for crossing the different eccentricities corrected using this method is essentially coincided, wherein before the real part that (a) is bearing signal corrects
With contrast schematic diagram after correction, (b) for bearing signal imaginary part correction before and correction after contrast schematic diagram；Fig. 5, for using existing
The comparison diagram of the rectification effect of technology, wherein (d) being with contrast schematic diagram after correction before (c) being corrected for the real part of bearing signal
The imaginary part of bearing signal corrects contrast schematic diagram after preceding and correction.It can be seen that the above numerical simulation result demonstrates side in the present embodiment
Validity of the method to wellbore eccentric correction.
The embodiment of the present invention provides a kind of correction wellbore bias to the method for orientation effect of signals, and this method passes through in numerical value
Influence of the formation conductivity to correction parameter is introduced in the case where simulation, and axially receives the corresponding axial direction of antenna in use
Receive signal influences brought by formation conductivity to characterize；Further, by constructing about first orientation signal and second
The multinomial of relationship between signal ratio between bearing signal and axial signal confirms correction coefficient, the school obtained with this
Positive coefficient is to consider formation conductivity to influence correction coefficient；Finally, can be by the correction coefficient to the wellbore during actual measurement
The borehole wall reflection signal eliminated, so that it may obtain characterization stratigraphic boundary distance third bearing signal, the third bearing signal
It is more accurate, it is smaller by wellbore Influence from Eccentric.To sum up, the present invention has comprehensively considered stratum conductance when eliminating wellbore Influence from Eccentric
The influence factor of rate, it is more thorough to the inhibition of wellbore Influence from Eccentric, stratigraphic boundary distance can finally be determined more accurately.
Second embodiment
Fig. 6 is please referred to, based on the same inventive concept, provides a kind of correction wellbore bias in the present embodiment to bearing signal
The device 300 of influence, described device 300 include:
Analog parameter obtains module 301, in the wellbore threedimensional model on uniform stratum, acquisition to axially receive antenna pair
The axial signal answered, the corresponding first orientation signal of first orientation receiving antenna and second orientation receiving antenna corresponding
Two bearing signals；It is wherein, described that axially receive antenna, the first orientation receiving antenna and the second orientation receiving antenna equal
For with the antenna for boring orientation electromagnetic wave resistivity instrument；
Signal relation constructs module 302, for based on the axial signal, the first orientation signal and the second party
Position signal building indicates the multinomial of signal relation；Wherein, the signal relation is the first orientation signal and described second
The relationship of signal ratio and the axial signal between bearing signal；
Correction coefficient obtains module 303, for axially receiving antenna according in the multinomial and the wellbore
Received axial direction measured signal is obtained to the eccentric corrected correction coefficient of wellbore；
Correction module 304, for it is eccentric in the wellbore to the instrument during actual measurement according to the correction coefficient when to well
Wall reflection signal is eliminated, and the third bearing signal of characterization stratigraphic boundary distance is obtained.
As an alternative embodiment, the analog parameter obtains module 301, it is also used to:
Obtain the parameter information of the wellbore；Information based on the parameter constructs the wellbore threedimensional model；Based on described
Wellbore threedimensional model carries out numerical simulation, obtains the axial signal, the first orientation signal and the second orientation signal.
As an alternative embodiment, the multinomial are as follows:Its
In, aiFor polynomial coefficient, i value arrives n, V for 0zzFor the axial signal under uniform stratum, Vzx1For under uniform stratum
One bearing signal, Vzx2For the second orientation signal under uniform stratum.
As an alternative embodiment, the correction coefficient obtains module 303, it is specifically used for:
Based on the axial signal, the first orientation signal and the second orientation signal, the multinomial is carried out
Data fitting, determines the polynomial multinomial coefficient；According to the axial direction in the multinomial coefficient and the wellbore
The received axial measured signal of receiving antenna, obtains to the eccentric corrected correction coefficient of wellbore.
As an alternative embodiment, the correction module 304, is specifically used for:
Based on V 'zx=V 'zx1-AV′zx2, obtain the third bearing signal of characterization stratigraphic boundary distance；Wherein, V'zxIt is
Three-bearing signal, V'zx1For the first orientation measured signal that first orientation receiving antenna measures under actual condition, V'zx2
For the second orientation measured signal that second orientation receiving antenna measures under actual condition, A is correction coefficient.
It should be noted that a kind of correction wellbore bias provided by the embodiment of the present invention is to the 300 of orientation effect of signals,
The technical effect that it implements and generates is identical with preceding method embodiment, and to briefly describe, Installation practice part is not mentioned
And place, it can refer to corresponding contents in preceding method embodiment.
It should be noted that in user terminal provided by the embodiment of the present invention, the specific implementation of above-mentioned each step and
The technical effect of generation is identical with preceding method embodiment, and to briefly describe, the present embodiment does not refer to that place can refer to aforementioned side
Corresponding contents in method embodiment.
3rd embodiment
A kind of computer readable storage medium is also provided in the present embodiment, is stored thereon with computer program, the program
Following step is realized when being executed by processor:
In the wellbore threedimensional model on uniform stratum, acquisition axially receives the corresponding axial signal of antenna, and first orientation connects
Receive the corresponding first orientation signal of antenna and the corresponding second orientation signal of second orientation receiving antenna；Wherein, it axially receives
Antenna, first orientation receiving antenna and second orientation receiving antenna are with the antenna for boring orientation electromagnetic wave resistivity instrument；Base
The multinomial of signal relation is indicated in the axial signal, the first orientation signal and second orientation signal building；Its
In, signal ratio of the signal relation between the first orientation signal and the second orientation signal and the axial letter
Number relationship；The received axial measured signal of antenna is axially received according in the multinomial and the wellbore, is obtained
To the eccentric corrected correction coefficient of wellbore；When eccentric in the wellbore to the instrument during actual measurement according to the correction coefficient
Borehole wall reflection signal is eliminated, the third bearing signal of characterization stratigraphic boundary distance is obtained.
If the integrated functional module of device provided by the invention is realized in the form of software function module and as independence
Product when selling or using, can store in a computer readable storage medium.Based on this understanding, of the invention
Realize above-described embodiment method in all or part of the process, can also be instructed by computer program relevant hardware come
It completes, the computer program can be stored in a computer readable storage medium, which holds by processor
When row, it can be achieved that the step of above-mentioned each embodiment of the method.Wherein, the computer program includes computer program code, institute
Stating computer program code can be source code form, object identification code form, executable file or certain intermediate forms etc..It is described
Computer-readable medium may include: any entity or device, recording medium, U that can carry the computer program code
Disk, mobile hard disk, magnetic disk, CD, computer storage, read-only memory (ROM, Read-Only Memory), arbitrary access
Memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It needs
It is bright, the content that the computer-readable medium includes can according in jurisdiction make laws and patent practice requirement into
Row increase and decrease appropriate, such as do not include electric load according to legislation and patent practice, computer-readable medium in certain jurisdictions
Wave signal and telecommunication signal.
Algorithm and display are not inherently related to any particular computer, virtual system, or other device provided herein.
Various general-purpose systems can also be used together with teachings based herein.As described above, it constructs required by this kind of system
Structure be obvious.In addition, the present invention is also not directed to any particular programming language.It should be understood that can use various
Programming language realizes summary of the invention described herein, and the description done above to language-specific is to disclose this hair
Bright preferred forms.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, structure is not been shown in detail
And technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of the various inventive aspects, In
Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
Shield the present invention claims features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, inventive aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as a separate embodiment of the present invention.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Member or component are combined into a module or unit or component, and furthermore they can be divided into multiple submodule or subelement or
Sub-component.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.
In addition, it will be appreciated by those of skill in the art that although some embodiments in this include institute in other embodiments
Including certain features rather than other feature, but the combination of the feature of different embodiment means in the scope of the present invention
Within and form different embodiments.For example, in the following claims, embodiment claimed it is any it
One can in any combination mode come using.
Various component embodiments of the invention can be implemented in hardware, or to run on one or more processors
Software module realize, or be implemented in a combination thereof.It will be understood by those of skill in the art that can be used in practice
Microprocessor or digital signal processor (DSP) realize gateway according to an embodiment of the present invention, proxy server, in system
Some or all components some or all functions.The present invention is also implemented as executing side as described herein
Some or all device or device programs (for example, computer program and computer program product) of method.It is such
It realizes that program of the invention can store on a computer-readable medium, or can have the shape of one or more signal
Formula.Such signal can be downloaded from an internet website to obtain, and perhaps be provided on the carrier signal or with any other shape
Formula provides.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and ability
Field technique personnel can be designed alternative embodiment without departing from the scope of the appended claims.In the claims,
Any reference symbol between parentheses should not be configured to limitations on claims.Word "comprising" does not exclude the presence of not
Element or step listed in the claims.Word "a" or "an" located in front of the element does not exclude the presence of multiple such
Element.The present invention can be by means of including the hardware of several different elements and being come by means of properly programmed computer real
It is existing.In the unit claims listing several devices, several in these devices can be through the same hardware branch
To embody.The use of word first, second, and third does not indicate any sequence.These words can be explained and be run after fame
Claim.
Claims (10)
1. a kind of correction wellbore bias is to the method for orientation effect of signals, which is characterized in that the described method includes:
In the wellbore threedimensional model on uniform stratum, acquisition axially receives the corresponding axial signal of antenna, and first orientation receives day
The corresponding first orientation signal of line and the corresponding second orientation signal of second orientation receiving antenna；Wherein, described to axially receive
Antenna, the first orientation receiving antenna and the second orientation receiving antenna are with brill orientation electromagnetic wave resistivity instrument
Antenna；
The multinomial of expression signal relation is constructed based on the axial signal, the first orientation signal and the second orientation signal
Formula；Wherein, signal ratio of the signal relation between the first orientation signal and the second orientation signal with it is described
The relationship of axial signal；
The received axial measured signal of antenna is axially received according in the multinomial and the wellbore, is obtained to wellbore
Eccentric corrected correction coefficient；
Borehole wall reflection signal is eliminated when eccentric in the wellbore to the instrument during actual measurement according to the correction coefficient, is obtained
The third bearing signal of stratigraphic boundary distance must be characterized.
2. the method according to claim 1, wherein the acquisition axially receives the corresponding axial signal of antenna,
The corresponding first orientation signal of first orientation receiving antenna and the corresponding second orientation signal of second orientation receiving antenna, packet
It includes:
Obtain the parameter information of the wellbore；
Information based on the parameter constructs the wellbore threedimensional model；
Numerical simulation is carried out based on the wellbore threedimensional model, obtains the axial signal, the first orientation signal and described
Second orientation signal.
3. the method according to claim 1, wherein the multinomial are as follows: Wherein, aiFor polynomial coefficient, i value arrives n, V for 0zzFor the axial signal under uniform stratum,
Vzx1For the first orientation signal under uniform stratum, Vzx2For the second orientation signal under uniform stratum.
4. the method according to claim 1, wherein described according in the multinomial and the wellbore
The received axial measured signal of antenna is axially received, is obtained to the eccentric corrected correction coefficient of wellbore, comprising:
Based on the axial signal, the first orientation signal and the second orientation signal, data are carried out to the multinomial
Fitting, determines the polynomial multinomial coefficient；
The received axial measured signal of antenna, acquisition pair are axially received according in the multinomial coefficient and the wellbore
The eccentric corrected correction coefficient of wellbore.
5. the method according to claim 1, wherein it is described according to the correction coefficient to the instrument during actual measurement
Borehole wall reflection signal is eliminated when device is eccentric in the wellbore, obtains the third bearing signal of characterization stratigraphic boundary distance, packet
It includes:
Based on V 'zx=V 'zx1-AV′zx2, obtain the third bearing signal of characterization stratigraphic boundary distance；Wherein, V'zxFor the third
Bearing signal, V'zx1For the first orientation measured signal that first orientation receiving antenna measures under actual condition, V'zx2For
The second orientation measured signal that second orientation receiving antenna measures under actual condition, A are correction coefficient.
6. a kind of correction wellbore bias is to the device of orientation effect of signals, which is characterized in that described device includes:
Analog parameter obtains module, in the wellbore threedimensional model on uniform stratum, acquisition to axially receive the corresponding axis of antenna
To signal, the corresponding first orientation signal of first orientation receiving antenna and the corresponding second orientation of second orientation receiving antenna
Signal；Wherein, it is electric with orientation electromagnetic wave is bored for axially receiving antenna, first orientation receiving antenna and second orientation receiving antenna
The antenna of resistance rate instrument；
Signal relation constructs module, for based on the axial signal, the first orientation signal and the second orientation signal
Building indicates the multinomial of signal relation；Wherein, the signal relation is that the first orientation signal and the second orientation are believed
The relationship of signal ratio and the axial signal between number；
Correction coefficient obtains module, for axially receiving the received axis of antenna according in the multinomial and the wellbore
To measured signal, obtain to the eccentric corrected correction coefficient of wellbore；
Correction module, for it is eccentric in the wellbore to the instrument during actual measurement according to the correction coefficient when borehole wall reflected believe
It number is eliminated, obtains the third bearing signal of characterization stratigraphic boundary distance.
7. device according to claim 6, which is characterized in that the analog parameter obtains module, is also used to:
Obtain the parameter information of the wellbore；
Information based on the parameter constructs the wellbore threedimensional model；
Numerical simulation is carried out based on the wellbore threedimensional model, obtains the axial signal, the first orientation signal and described
Second orientation signal.
8. device according to claim 6, which is characterized in that the correction coefficient obtains module, is specifically used for:
Based on the axial signal, the first orientation signal and the second orientation signal, data are carried out to the multinomial
Fitting, determines the polynomial multinomial coefficient；
The received axial measured signal of antenna, acquisition pair are axially received according in the multinomial coefficient and the wellbore
The eccentric corrected correction coefficient of wellbore.
9. device according to claim 6, which is characterized in that the correction module is specifically used for:
Based on V 'zx=V 'zx1-AV′zx2, obtain the third bearing signal of characterization stratigraphic boundary distance；Wherein, V'zxFor third orientation
Signal, V'zx1For the first orientation measured signal that first orientation receiving antenna measures under actual condition, V'zx2It is second
The second orientation measured signal that orientation receiving antenna measures under actual condition, A are correction coefficient.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is by processor
The step of any one of claim 1-5 the method is realized when execution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910777451.9A CN110454154B (en) | 2019-08-22 | 2019-08-22 | Method and device for correcting influence of borehole eccentricity on azimuth signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910777451.9A CN110454154B (en) | 2019-08-22 | 2019-08-22 | Method and device for correcting influence of borehole eccentricity on azimuth signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110454154A true CN110454154A (en) | 2019-11-15 |
| CN110454154B CN110454154B (en) | 2020-08-25 |
Family
ID=68488460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910777451.9A Active CN110454154B (en) | 2019-08-22 | 2019-08-22 | Method and device for correcting influence of borehole eccentricity on azimuth signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110454154B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619099A (en) * | 2003-10-15 | 2005-05-25 | 施卢默格海外有限公司 | Induction measurements with reduced borehole effects |
| CN1644875A (en) * | 2003-12-02 | 2005-07-27 | 施卢默格海外有限公司 | Apparatus and method for addressing borehole eccentricity effects |
| CN102493766A (en) * | 2011-11-30 | 2012-06-13 | 中国石油集团钻井工程技术研究院 | Borehole track control method and borehole track control system |
| WO2016108840A1 (en) * | 2014-12-30 | 2016-07-07 | Halliburton Energy Services, Inc. | Electromagnetic ranging with azimuthal electromagnetic logging tool |
| US20160369625A1 (en) * | 2015-06-22 | 2016-12-22 | Conocophillips Company | Crustal and disturbance field survey correction |
| CN108547611A (en) * | 2018-03-01 | 2018-09-18 | 杭州迅美科技有限公司 | Horizontal well complex environment is with brill electromagnetic wave resistivity logging rapid simulation method |
-
2019
- 2019-08-22 CN CN201910777451.9A patent/CN110454154B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619099A (en) * | 2003-10-15 | 2005-05-25 | 施卢默格海外有限公司 | Induction measurements with reduced borehole effects |
| CN1644875A (en) * | 2003-12-02 | 2005-07-27 | 施卢默格海外有限公司 | Apparatus and method for addressing borehole eccentricity effects |
| CN102493766A (en) * | 2011-11-30 | 2012-06-13 | 中国石油集团钻井工程技术研究院 | Borehole track control method and borehole track control system |
| WO2016108840A1 (en) * | 2014-12-30 | 2016-07-07 | Halliburton Energy Services, Inc. | Electromagnetic ranging with azimuthal electromagnetic logging tool |
| US20160369625A1 (en) * | 2015-06-22 | 2016-12-22 | Conocophillips Company | Crustal and disturbance field survey correction |
| CN108547611A (en) * | 2018-03-01 | 2018-09-18 | 杭州迅美科技有限公司 | Horizontal well complex environment is with brill electromagnetic wave resistivity logging rapid simulation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110454154B (en) | 2020-08-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2378669C2 (en) | Method of correcting well effect on data of three dimensional induction probes | |
| Callegary et al. | Vertical spatial sensitivity and exploration depth of low‐induction‐number electromagnetic‐induction instruments | |
| US7912648B2 (en) | Method and apparatus for imaging bed boundaries using azimuthal propagation resistivity measurements | |
| CA2488144C (en) | Method for determining sonde error for an induction or propagation tool with transverse or triaxial arrays | |
| GB2444800A (en) | Determining formation properties using the electromagnetic coupling tensor | |
| Pardo et al. | Sensitivity analysis for the appraisal of hydrofractures in horizontal wells with borehole resistivity measurements | |
| CA2423567C (en) | Method for 2d inversion of dual laterolog measurements | |
| US20100321023A1 (en) | Attenuation of electromagnetic signals passing through conductive material | |
| Dyatlov et al. | Efficient 2.5 D electromagnetic modeling using boundary integral equations | |
| AU2009311479B2 (en) | Systems and methods for computing and validating a variogram model | |
| BR112015012050A2 (en) | formation imaging with multipole antennas | |
| Grayver et al. | Three-dimensional magnetotelluric modelling in spherical Earth | |
| Pardo et al. | Simulation of multifrequency borehole resistivity measurements through metal casing using a goal-oriented hp finite-element method | |
| AU2012397812A1 (en) | Deep azimuthal system with multi-pole sensors | |
| WO2014098806A9 (en) | Methods and apparatus to acquire compensated signals for determination of formation parameters | |
| US10578764B2 (en) | Simultaneous error correction and inversion | |
| Nam et al. | Simulation of triaxial induction measurements in dipping, invaded, and anisotropic formations using a Fourier series expansion in a nonorthogonal system of coordinates and a self-adaptive hp finite-element method | |
| Gao et al. | Forward modelling of multi-component induction logging tools in layered anisotropic dipping formations | |
| WO2017048507A1 (en) | Method for estimating formation dip azimuth and eccentering azimuth | |
| CN110454154A (en) | A kind of correction wellbore bias is to the method and device of orientation effect of signals | |
| Li et al. | Electromagnetic propagation logging while drilling data acquisition method based on undersampling technology | |
| Li et al. | Calibration method of azimuth electromagnetic boundary detection logging while drilling based on air–seawater double-layer dielectric as reflection interface | |
| Qi et al. | Full waveform modeling of transient electromagnetic response based on temporal interpolation and convolution method | |
| AU2015406809A1 (en) | Data-driven focused inversions | |
| Parnow et al. | Improved linear inversion of low induction number electromagnetic data |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |