CN106842327B - The method for obtaining the orientation constructed by well - Google Patents
The method for obtaining the orientation constructed by well Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/40—Seismology; Seismic or acoustic prospecting or detecting specially adapted for well-logging
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
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Abstract
The present invention provides a kind of method in acquisition well orientation that side constructs.The method in the orientation constructed by acquisition well of the invention includes: corresponding first sound wave of each acoustic receiver obtained on each test surfaces；It is filtered using stratum longitudinal wave FIR filter the first sound wave corresponding to each acoustic receiver, obtains the corresponding stratum longitudinal wave of each first sound wave；The stratum longitudinal wave of the stratum longitudinal wave of direct wave in the corresponding stratum longitudinal wave of each first sound wave and back wave is subjected to related coefficient calculating, obtains corresponding time when correlation function takes maximum, then using the corresponding time as back wave；Acquisition is located at the summation of the corresponding back wave of corresponding first sound wave of each acoustic receiver in same orientation then；According to the orientation of the corresponding back wave of different direction summation then and the 1st acoustic receiver, the orientation constructed by well is obtained.The method in the orientation constructed by acquisition well of the invention can be used for during continuous logging, accurate to the measurement in the orientation constructed by well.
Description
Technical field
The present invention relates to logging technique more particularly to a kind of methods for obtaining the orientation constructed by well.
Background technique
Construction and well wellbore relative bearing relationship by well can be determined according to the orientation constructed by well, construction and oil by well
Well shaft relative bearing relationship combination catoptric imaging can be obtained and construct occurrence information by well, construction and well wellbore opposite side by well
Position relationship can also determine that construction is in the spatial of well wellbore by well, be transformed for later period petroleum reservoir provide engineering construction according to
According to therefore, the orientation for obtaining construction by well has great importance.Wherein, construction refers to the geology around well wellbore by well
Construction, such as tomography, reservoir and crack etc..
Acquisition methods to the orientation constructed by well at present mainly have the remote detection imaging method of orthogonal dipole, are based on three-component
Remote detection method and BARS (Borehole acoustic reflection survey) method of sensor.Wherein, orthogonal
The remote detection imaging method of dipole is using cross-dipole directional transmissions and receives, and passes through double Cosine mappings and shear wave radiation, reception sound
Field relationship obtains the occurrence information such as inclination angle, tendency and trend for constructing by well, but is determining that the orientation of construction and pit shaft is closed by well
When being, is limited by the combination of Acoustic measuring instrument acoustic receiver, there are 180 ° of uncertainties in construction orientation；It is based on
The remote detection method of three component sensor eliminates construction by well by the joint inversion to back wave horizontal component and vertical component
Orientation it is uncertain, but be limited by three component sensor itself limitation, it is difficult to be applied to continuous logging process；BARS method benefit
It is compared with different direction receiver backward energy size, can determine and construct orientation by well, but in practical applications, reflection
Wave energy is influenced vulnerable to a variety of uncertainties, the measurement result inaccuracy in the orientation constructed by well.
Summary of the invention
The present invention provides a kind of method in acquisition well orientation that side constructs, to overcome the orientation constructed by well in the prior art
Measurement result inaccuracy technical problem.
The present invention provides a kind of method in acquisition well orientation that side constructs, and is applied to array acoustic imaging logging instrument, described
Array acoustic imaging logging instrument includes pinger and multiple acoustic receivers, and each source is away from including position on corresponding test surfaces
In the 1st acoustic receiver, the 2nd acoustic receiver to N acoustic receiver of different direction, the 1st sound wave on same test surfaces
Receiver to N acoustic receiver according to being evenly arranged on the same circumference clockwise, and corresponding n-th sound wave of each test surfaces
Receiver is located at the same orientation, n=1,2 ... N, which comprises
Obtain corresponding first sound wave of each acoustic receiver on each test surfaces, wherein the first sound wave is acoustic receiver
The signal of received sound wave；
It is filtered, is obtained each using stratum longitudinal wave FIR filter first sound wave corresponding to each acoustic receiver
The corresponding stratum longitudinal wave of first sound wave；
By the stratum longitudinal wave of the stratum longitudinal wave of the direct wave in the corresponding stratum longitudinal wave of each first sound wave and back wave
Related coefficient calculating is carried out, obtains corresponding time when correlation function takes maximum, then using the time as back wave, often
The corresponding back wave of a first sound wave is then；
Acquisition is located at the summation of the corresponding back wave of corresponding first sound wave of each acoustic receiver in same orientation then, often
The summation of the corresponding back wave in a orientation then；
According to the orientation of the corresponding back wave of different direction summation then and the 1st acoustic receiver, obtain by well
The orientation of construction.
Method as described above, using stratum longitudinal wave FIR filter first sound corresponding to each acoustic receiver
Wave is filtered, before obtaining the corresponding stratum longitudinal wave of each first sound wave, the method also includes:
For each test surfaces, the wave-shape amplitude of corresponding first sound wave of acoustic receiver each on same test surfaces is carried out
Weighted average, obtains the second sound wave；Wherein, the second sound wave includes stratum longitudinal wave；
The slowness of stratum longitudinal wave is obtained according to the second sound wave on all test surfaces using slowness time coherence；
Frequency dispersion figure, the second sound wave packet are obtained according to the second sound wave on all test surfaces using frequency dispersion separation method
Each mode wave contained is distributed at the different location on the frequency dispersion figure, and the ordinate of the frequency dispersion figure is slowness, and abscissa is
Frequency；
According to the slowness of the stratum longitudinal wave and the frequency dispersion figure, the target frequency of stratum longitudinal wave is determined；
According to the target frequency, stratum longitudinal wave FIR filter is obtained.
Method as described above, it is described to be connect according to the summation of the corresponding back wave of different direction then with the 1st sound wave
The orientation for receiving device obtains the orientation constructed by well, comprising:
The corresponding back wave of the first sound wave that acoustic receiver in all directions receives is arrived according to sequence from small to large
When summation be ranked up；
Construction by the well is determined according to the orientation of the sequence of the summation of each back wave then and the 1st acoustic receiver
Orientation.
Method as described above, same test surfaces include 4 or 6 acoustic receivers；
The sequence and the orientation of the 1st acoustic receiver of the summation according to each back wave then determine construction by well
Orientation includes:
If the summation of each back wave then is all different, and the difference of the summation of the back wave of sequence first and second then
Not within the scope of preset difference value, the corresponding orientation of summation of each back wave of the sequence first then is the i-th acoustic receiver
Orientation, according to the orientation of first receiver obtain the i-th acoustic receiver orientation, by i-th acoustic receiver
Orientation is as the orientation constructed by the well；
If the summation of each back wave then is all different, and the difference of the summation of the back wave of sequence first and second then
Within the scope of preset difference value, the corresponding orientation of summation of each back wave of the sequence first then is the i-th acoustic receiver
Orientation, the corresponding orientation of summation of each back wave of the sequence second then is the orientation of jth acoustic receiver, according to described
The orientation of first receiver determines the orientation of i-th acoustic receiver and jth acoustic receiver middle position, will be described
The orientation in middle position is as the orientation constructed by the well；
Wherein, 1≤i≤N, 1≤j≤N, i, j are positive integer.
Method as described above, same test surfaces include 8 acoustic receivers；
The sequence and the orientation of the 1st acoustic receiver of the summation according to each back wave then determine construction by well
Orientation includes:
If the summation of each back wave then is all different, the corresponding side of summation of each back wave of the sequence first then
Position is the orientation of the i-th acoustic receiver, the orientation of the i-th acoustic receiver is obtained according to the orientation of first receiver, by i-th
The orientation of acoustic receiver is as the orientation constructed by the well.
Method as described above, in sequence and the 1st acoustic receiver of the summation according to each back wave then
Orientation determine the orientation constructed by well after, the method also includes:
The trend constructed by the well is obtained, the trend constructed by the well refers to construction and the positive north by the well
To angle counterclockwise.
Method as described above is indulged on the stratum by the direct wave in the corresponding stratum longitudinal wave of each first sound wave
The stratum longitudinal wave of wave and back wave carries out related coefficient calculating, obtains when correlation function takes maximum before the corresponding time, also
Include:
The stratum for separating the direct wave in the corresponding stratum longitudinal wave of each first sound wave using the method for wave field separation is vertical
The stratum longitudinal wave of wave and back wave.
Method as described above, the corresponding sound source of the pinger are the undirected radiation sound source of single-stage.
The method in the orientation constructed by acquisition well of the invention includes: that each acoustic receiver obtained on each test surfaces corresponds to
The first sound wave；Wherein, the first sound wave is the signal of the received sound wave of acoustic receiver；Using stratum longitudinal wave FIR filter pair
Corresponding first sound wave of each acoustic receiver is filtered, and obtains the corresponding stratum longitudinal wave of each first sound wave；By each described first
The stratum longitudinal wave of direct wave in the corresponding stratum longitudinal wave of sound wave and the stratum longitudinal wave of back wave carry out related coefficient calculating, obtain
Correlation function corresponding time when taking maximum, when correlation function is taken maximum the corresponding time as back wave then, often
The corresponding back wave of a first sound wave is then；Corresponding first sound wave of each acoustic receiver obtained positioned at same orientation is corresponding
Back wave summation then, the summation of the corresponding back wave in each orientation then；According to the corresponding back wave of different direction
The orientation of summation and the 1st acoustic receiver then, obtains the orientation constructed by well.Of the invention obtains the orientation constructed by well
Method can be used for during continuous logging, it is accurate to the measurement in the orientation constructed by well.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow chart one of the method in the orientation constructed by acquisition well provided by the invention；
Fig. 2 is the schematic diagram of a scenario in the orientation constructed by measurement well provided by the invention；
Fig. 3 is the acoustic receiver schematic diagram one on a test surfaces provided by the invention；
Fig. 4 is the acoustic receiver schematic diagram two on a test surfaces provided by the invention；
Fig. 5 is that construction orientation determines schematic diagram one by well provided by the invention；
Fig. 6 is that construction orientation determines schematic diagram two by well provided by the invention；
Fig. 7 is that construction orientation determines schematic diagram three by well provided by the invention；
Fig. 8 is the schematic diagram for obtaining the trend constructed by well；
Fig. 9 is the flowchart 2 of the method in the orientation constructed by acquisition well provided by the invention；
Figure 10 is the schematic diagram of corresponding second sound wave of each test surfaces provided by the invention；
Figure 11 m- slowness correlation figure when being provided by the invention；
Figure 12 is frequency dispersion figure provided by the invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A 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
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
By continuously acquiring the orientation constructed by well, the space exhibition constructed by available well in different depth of stratum
Cloth provides engineering construction foundation for the transformation of later period petroleum reservoir, therefore, obtains the orientation constructed by well and has great importance.
The present invention provide it is a kind of can consecutive variations fathom in the method for measuring the orientation constructed by the well at different depth, to obtain
The spatial constructed by well.The method in the orientation constructed by acquisition well of the invention is described in detail below.
Fig. 1 is the flow chart one of the method in the orientation constructed by acquisition well provided by the invention, as shown in Figure 1, this implementation
Example method may include:
Step S101, corresponding first sound wave of each acoustic receiver on each test surfaces is obtained；Wherein, the first sound wave is sound
The signal of the received sound wave of wave receiver；
Step S102, it is filtered, is obtained using stratum longitudinal wave FIR filter the first sound wave corresponding to each acoustic receiver
To the corresponding stratum longitudinal wave of each first sound wave；
Step S103, by the stratum longitudinal wave of the direct wave in the corresponding stratum longitudinal wave of each first sound wave and back wave
Stratum longitudinal wave carries out related coefficient calculating, obtains corresponding time when correlation function takes maximum, using the time as reflecting
Then, the corresponding back wave of each first sound wave is then for wave；
Step S104, acquisition is located at the corresponding back wave of corresponding first sound wave of each acoustic receiver in same orientation then
Summation, the summation of the corresponding back wave in each orientation then；
Step S105, the summation and the orientation of the 1st acoustic receiver according to the corresponding back wave of different direction then, obtains
The orientation constructed by well.
Specifically, Fig. 2 is the schematic diagram of a scenario in the orientation constructed by measurement well provided by the invention, and Fig. 3 mentions for the present invention
The acoustic receiver schematic diagram one on a test surfaces supplied, Fig. 4 are the acoustic receiver on a test surfaces provided by the invention
Device schematic diagram two.Referring to fig. 2~4, the measuring device that the present embodiment uses for array acoustic imaging logging instrument 21, array acoustic at
As logging instrument 21 includes pinger 22 and multiple acoustic receivers 23, each source is away from a corresponding test surfaces, and source is away from referring to
The distance between acoustic receiver and pinger；Each source includes the 1st sound for being located at different direction on test surfaces away from corresponding to
Wave receiver, the 2nd acoustic receiver to N acoustic receiver, the 1st acoustic receiver to N sound wave connects on same test surfaces
Device is received according to being evenly arranged on the same circumference clockwise, and corresponding n-th acoustic receiver of each test surfaces be located at it is same
Orientation, n=1,2 ... N.There is N=4 acoustic receiver, the folder between each receiver on a test surfaces shown in Fig. 3
Angle is 90 °, and R1, R2, R3, R4 in figure respectively represent the 1st acoustic receiver, the 2nd acoustic receiver, the 3rd acoustic receiver, the
4 acoustic receivers；There is N=8 acoustic receiver, the angle between each receiver is on a test surfaces shown in Fig. 4
45 °, R1, R2, R3, R4, R5, R6, R7, R8 in figure respectively represent the 1st acoustic receiver, the 2nd acoustic receiver, the 3rd sound wave
Receiver, the 4th acoustic receiver, the 5th acoustic receiver, the 6th acoustic receiver, the 7th acoustic receiver, the 8th acoustic receiver.
Wherein, the corresponding sound source of pinger is the undirected radiation sound source of single-stage.
Referring to Fig. 3, first direction is positive north orientation.Orientation refers to the 1st acoustic receiver, the 2nd acoustic receiver to the 4th sound
Wave receiver composition circle the center of circle be angle vertex, the straight line formed using the point N on the center of circle and first direction as the one side at angle,
Using the straight line that the central point in the center of circle and acoustic receiver forms as the another side at angle, obtained angle clockwise, such as ∠ NOM,
Such as ∠ NOP.If existing without the center of circle, the choosing method on the vertex at angle are as follows: in the straight line and object where in a first direction
The first direction of the intersection point of straight line where heart point takes a point, and in a first direction on the straight line at place, this point is this point
For the vertex at angle, using the straight line where first direction as the one side at angle, using the central point straight line of vertex and object as the another of angle
Side, obtained angle clockwise are the orientation of the object.
The inside of well wellbore 25 is arranged in array acoustic imaging logging instrument 21, can move up and down, in different depths
Construction by degree measurement well, realizes continuous logging, to can determine the distribution of construction spatially by a well.As shown in Figure 2
Construction 24, can measure well on different 26 depth directions of stratum by gradually moving down array acoustic imaging logging instrument by well
The orientation of side construction, determine construction 24 by well spatially be distributed as location A to B location.
The received sound wave of each acoustic receiver on each test surfaces is sampled, each acoustic receiver corresponding first is obtained
Sound wave, wherein the first sound wave is the signal of the received sound wave of each acoustic receiver；
After obtaining corresponding first sound wave of each acoustic receiver, using stratum longitudinal wave FIR filter to each acoustic receiver
Corresponding first sound wave is filtered, and obtains the corresponding stratum longitudinal wave of each first sound wave.Wherein, there is direct wave in the first sound wave
And back wave, the direct wave in the first sound wave are the direct-path signal in the received sound wave of acoustic receiver, in the first sound wave
Back wave is the reflection wave signal in the received sound wave of acoustic receiver；Direct wave is the sound wave of sonic generator transmitting without anti-
The wave penetrated, back wave are wave of the sound wave of sonic generator transmitting by reflection.Each received sound wave of acoustic receiver has more
Kind mode wave, stratum longitudinal wave are the wave signal for the one mode for including in the first sound wave, again include direct wave in the longitudinal wave of stratum
The stratum longitudinal wave of stratum longitudinal wave and back wave.Stratum longitudinal wave FIR filter only allows stratum longitudinal wave to pass through, remaining wave signal quilt
It filters, therefore, the first sound wave is filtered using stratum longitudinal wave FIR filter, available each first sound wave is correspondingly
Layer longitudinal wave.
The stratum longitudinal wave of the stratum longitudinal wave of direct wave in the corresponding stratum longitudinal wave of each first sound wave and back wave is carried out
Related coefficient calculates, and obtains corresponding time when correlation function takes maximum, corresponding time when correlation function is taken maximum
Then as back wave, each first sound wave corresponds to a back wave then.Back wave is then the time that back wave reaches, than
Such as, the time that back wave reaches can be 5s, 7s etc..Wherein, two train waves are subjected to related coefficient calculating, obtain correlation function
Corresponding time when taking maximum is method mature in the prior art, does not repeat in the present embodiment.
By the stratum longitudinal wave of the stratum longitudinal wave of the direct wave in the corresponding stratum longitudinal wave of each first sound wave and back wave into
Correlation series calculate, and obtain when correlation function takes maximum before the corresponding time, further include step " using wave field separation
Method separates the stratum longitudinal wave of the direct wave in the corresponding stratum longitudinal wave of each first sound wave and the stratum longitudinal wave of back wave ", wherein
The method of wave field separation is method in the prior art, is referred to the side in Chinese invention patent CN201510680914.1
Method repeats no more in the present embodiment.
Acquisition is located at the summation of the corresponding back wave of corresponding first sound wave of each acoustic receiver in same orientation then；Than
Such as, array acoustic imaging logging instrument includes 8 test surfaces (place is provided with acoustic receiver in 8 sources), and each orientation is corresponding
The summation of one back wave then, each test surfaces are provided with 4 acoustic receivers, then have 4 different orientation, i.e., 4
There is acoustic receiver in a orientation, there are 8 acoustic receivers in each orientation, then by 8 sound waves in each orientation
The corresponding back wave of corresponding first sound wave of receiver is then added, and obtains 4 back waves then summation.
Then according to the corresponding back wave of corresponding first sound wave of the acoustic receiver summation and the 1st then of different direction
The orientation of acoustic receiver obtains the orientation constructed by well.Back wave is then influenced relative to reflected energy by extraneous factor
It is smaller, it is accurate to the measurement in the orientation constructed by well.
Wherein, according to the corresponding back wave of corresponding first sound wave of the acoustic receiver of different direction summation then and the
The orientation of 1 acoustic receiver obtains the orientation constructed by well, specifically includes: according to sequence from small to large to sound in all directions
The summation of the corresponding back wave of corresponding first sound wave of wave receiver then is ranked up；According to the summation of each back wave then
Sequence and the orientation of the 1st acoustic receiver determine the orientation constructed by well.
Wherein, if same test surfaces include 4 or 6 acoustic receivers, according to the sequence of the summation of each back wave then
With the orientation of the 1st acoustic receiver, if determining, the orientation constructed by well includes: that the summation of each back wave then is all different, and
Not within the scope of preset difference value, the first each back wave of sorting arrives the difference of the back wave summation then of sequence first and second
When the corresponding orientation of summation be the i-th acoustic receiver orientation, according to the orientation of the first receiver obtain the i-th acoustic receiver
Orientation, using the orientation of the i-th acoustic receiver as the orientation constructed by well；If the summation of each back wave then is all different,
And the difference of the back wave summation then of sequence first and second is within the scope of preset difference value, the first each back wave of sorting arrives
When the corresponding orientation of summation be the i-th acoustic receiver orientation, sort second each back wave corresponding side of summation then
Position is the orientation of jth acoustic receiver, determines the i-th acoustic receiver and jth acoustic receiver according to the orientation of the first receiver
The orientation in middle position, using the orientation in middle position as the orientation constructed by well；Wherein, 1≤i≤N, 1≤j≤N, i, j are equal
For positive integer.
Specifically, if in the depth bounds that array acoustic imaging logging instrument is currently located at, without being constructed by well, then respectively
The back wave in orientation then should be identical；If having by well in the depth bounds that array acoustic imaging logging instrument is currently located at
Construction, then should first be received by the wave of construction reflection by well, the locating corresponding back wave in orientation of construction then should by well
It is minimum.
Fig. 5 is that construction orientation determines that schematic diagram one, Fig. 6 are construction side by well provided by the invention by well provided by the invention
Position determines that schematic diagram two, Fig. 7 are that construction orientation determines schematic diagram three by well provided by the invention.
Referring to Fig. 5, R1, R2, R3, R4 in figure respectively represent the 1st acoustic receiver, the 2nd acoustic receiver, the 3rd sound wave
Receiver, the 4th acoustic receiver, the orientation of thick dashed line meaning are the orientation of construction 24 by well；Situation shown in fig. 5 are as follows: if
The summation of each back wave then is all different, and the difference of the summation of the back wave of sequence first and second then is not default poor
It is worth in range, by taking same test surfaces include 4 acoustic receivers as an example, each orientation corresponding back wave then sequence of summation
Form is Ta< Tb< Tc< Td, then by TaThe orientation of the acoustic receiver in corresponding orientation is as the orientation constructed by well；If TaIt is right
The acoustic receiver in the orientation answered is the 3rd acoustic receiver, then obtains the 3rd acoustic receiver according to the orientation θ of the 1st acoustic receiver
The orientation of device is+90 ° of θ × 2；Even TaThe acoustic receiver in corresponding orientation is the i-th acoustic receiver, then according to the 1st sound wave
The orientation that the orientation θ of receiver obtains the i-th acoustic receiver is+90 ° of θ × (i-1).Wherein, preset difference value range can basis
Specific measurement process determines.
Referring to Fig. 6~7, R1, R2, R3, R4 in figure respectively represent the 1st acoustic receiver, the 2nd acoustic receiver, the 3rd sound
Wave receiver, the 4th acoustic receiver, the orientation of thick dashed line meaning are the orientation constructed by well；Situation shown in fig. 6 are as follows: if
The summation of each back wave then is all different, and the difference of the summation of the back wave of sequence first and second then is in preset difference value
In range, by taking same test surfaces include 4 acoustic receivers as an example, the shape of the corresponding back wave in each orientation then sequence of summation
Formula is Ta≈Tb< Tc< TdOr Ta≈Tb< Tc≈Td, the form of other back waves then sequence of summation is not present；Sequence
The corresponding orientation of summation of first each back wave then is the orientation of the 1st acoustic receiver, and the second each back wave of sorting arrives
When the corresponding orientation of summation be the 4th acoustic receiver orientation, the 1st acoustic receiver is determined according to the orientation of the first receiver
Orientation with the 4th acoustic receiver middle position is 315 ° of+θ, and the 1st acoustic receiver and the 4th acoustic receiver middle position are such as
In Fig. 6 shown in thick dashed line；If the corresponding orientation of summation of each back wave of sequence first then is the side of the 2nd acoustic receiver
Position, sort second each back wave corresponding orientation of summation then be the 3rd acoustic receiver orientation, according to the first receiver
The orientation of θ determines 135 ° of the orientation+θ in the 2nd acoustic receiver and the 3rd acoustic receiver middle position, the 2nd acoustic receiver and
3 acoustic receiver middle positions are as shown in thick dashed line in Fig. 7.
Herein it should be noted that no matter there are 4 acoustic receivers or 6 acoustic receivers on a test surfaces,
Each back wave corresponding orientation of summation then there is no sequence first is the orientation of the i-th acoustic receiver, sorts second
The case where corresponding orientation of the summation of each back wave then is the orientation of the i-th+2 acoustic receiver.
If same source is away from including 8 acoustic receivers, according to the sequence of the summation of each back wave then and the 1st acoustic receiver
The orientation of device, if determining, the orientation constructed by well includes: that the summation of each back wave then is all different, sort first each reflection
The corresponding acoustic receiver of the summation of wave then is the i-th acoustic receiver, obtains the i-th sound wave according to the orientation of the first receiver and connects
The orientation for receiving device, using the orientation of the i-th acoustic receiver as the orientation constructed by well.
Wherein, in the method in the orientation constructed by above-mentioned acquisition well, the method for the orientation θ of the 1st acoustic receiver of acquisition are as follows:
It is adopted as the acquisition of three parameter inclinometers in open hole well, is obtained in cased well for fibre optic gyroscope.
After the orientation for having obtained constructing by well, it can determine that the relative position by pit shaft and well between construction is closed
System.
Determined according to the orientation of the sequence of the summation of each back wave then and the 1st acoustic receiver the orientation that constructs by well it
It is further comprising the steps of afterwards: to obtain the trend constructed by well, the trend constructed by well refers to construction and direct north by the well
Angle counterclockwise.
Wherein, the trend constructed by well is the occurrence information constructed by well.Fig. 8 is the signal for obtaining the trend constructed by well
Figure.Construction, O by well are represented referring to Fig. 8, XY1It is formed for the 1st acoustic receiver to the 4th acoustic receiver on a certain test surfaces
The round center of circle, the orientation constructed by well are the orientation of the 2nd receiver, cross the central point of the 2nd receiver to constructing by well
First side makees vertical line, and intersection point is denoted as G, crosses G point and makees N1O1Parallel lines N2G, ∠ N2GY is the trend constructed by well.∠
N1O1+ 90 ° of G=θ, ∠ O1GN2=180 ° of-∠ N1O1G=90 ° of-θ, ∠ N2GY=90 ° of-∠ O1GN2=θ.By the well in other orientation
The method of the trend of construction is obtained according to above-mentioned method.
The method that the orientation constructed by well is obtained in the present embodiment includes: each acoustic receiver pair obtained on each test surfaces
The first sound wave answered；Wherein, the first sound wave is the signal of the received sound wave of acoustic receiver；Using stratum longitudinal wave FIR filter
The first sound wave corresponding to each acoustic receiver is filtered, and obtains the corresponding stratum longitudinal wave of each first sound wave；By each described
The stratum longitudinal wave of direct wave in the corresponding stratum longitudinal wave of one sound wave and the stratum longitudinal wave of back wave carry out related coefficient calculating, obtain
Corresponding time when taking maximum to correlation function, then using the time as back wave, each first sound wave are one corresponding
The back wave is then；It obtains and is located at corresponding first sound wave of each acoustic receiver corresponding back wave in same orientation then
Summation, the summation of the corresponding back wave in each orientation then；According to the summation and the 1st of the corresponding back wave of different direction then
The orientation of acoustic receiver obtains the orientation constructed by well.The method in the orientation constructed by the acquisition well of the present embodiment can be used
It is accurate to the measurement in the orientation constructed by well during continuous logging.
Specific embodiment is used below, and the technical solution of embodiment of the method shown in Fig. 1 is described in detail.
Fig. 9 is the flowchart 2 of the method in the orientation constructed by acquisition well provided by the invention, and the method for the present embodiment is
It " is being filtered using stratum longitudinal wave FIR filter the first sound wave received to each acoustic receiver, is obtaining each first sound wave pair
It carries out before the stratum longitudinal wave answered ", for the process for obtaining stratum longitudinal wave FIR filter, as shown in figure 9, the side of the present embodiment
Method may include:
Step S201, each test surfaces are directed to, the first sound wave that acoustic receiver each on same test surfaces is corresponded to
Wave-shape amplitude is weighted and averaged, and obtains the second sound wave；Wherein, the second sound wave includes stratum longitudinal wave；
Step S202, stratum longitudinal wave is obtained according to the second sound wave on all test surfaces using slowness time coherence
Slowness；
Step S203, a frequency dispersion figure is obtained according to the second sound wave on all test surfaces using frequency dispersion separation method,
Each mode wave that second sound wave includes is distributed at the different location on frequency dispersion figure, and the ordinate of frequency dispersion figure is slowness, abscissa
For frequency；
Step S204, according to the slowness of stratum longitudinal wave and frequency dispersion figure, the target frequency of stratum longitudinal wave is determined；
Step S205, according to target frequency, stratum longitudinal wave FIR filter is obtained.
Specifically, Figure 10 is the schematic diagram of corresponding second sound wave of each test surfaces provided by the invention；Figure 11 is the present invention
The when m- slowness correlation figure of offer；Figure 12 is frequency dispersion figure provided by the invention.
Referring to Figure 10~12, for each test surfaces, the first sound that acoustic receiver each on same test surfaces is corresponded to
The wave-shape amplitude of wave is weighted and averaged to obtain the second sound wave, that is to say, that if having 8 test surfaces, just has 8 rising tones
Wave.The property of second sound wave is identical as the property of the first sound wave in above-described embodiment, is direct wave at the location of C in Figure 10
It is through formation shear at stratum longitudinal wave, the position D, at the position E is through fluid-bed boundary Stoneley wave；Each mode
Back wave energy it is opposite smaller with the direct wave of each mode, be not easy to find out in Figure 10.However, being the ground of direct wave
The stratum longitudinal wave of layer longitudinal wave or back wave, the properties such as slowness and frequency are all consistent.
The slowness of stratum longitudinal wave is obtained according to 8 the second sound waves using slowness time coherence, such as the position F in Figure 11
Place；
Frequency dispersion figure is obtained according to 8 the second sound waves using frequency dispersion separation method, as shown in figure 12, the vertical seat of frequency dispersion figure
It is designated as slowness, abscissa is frequency；Each mode wave that second sound wave includes is distributed at the different location on frequency dispersion figure, and 101 are
Fluid-position of the bed boundary Stoneley wave on frequency dispersion figure, 102 be position of the formation shear on frequency dispersion figure, and 103 be stratum
Position of the longitudinal wave on frequency dispersion figure.
According to the position of the slowness (about 35~60us/ft) and stratum longitudinal wave of obtained stratum longitudinal wave on frequency dispersion figure, really
Determine the target frequency of stratum longitudinal wave, target frequency is about 18~30KHz.
According to target frequency, stratum longitudinal wave FIR filter is designed, the first sound wave is handled by stratum longitudinal wave FIR filter
Afterwards, only can retain corresponding stratum longitudinal wave, other mode waves under target frequency to be filtered out.
Obtain stratum longitudinal wave FIR filter, so that it may in application method shown in Fig. 1, obtain the orientation constructed by well.
The present embodiment provides technological means by obtaining stratum longitudinal wave FIR filter, to obtain the orientation constructed by well.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.
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 present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (8)
1. a kind of method for obtaining the orientation constructed by well, which is characterized in that be applied to array acoustic imaging logging instrument, the battle array
Column acoustic imaging logging instrument includes pinger and multiple acoustic receivers, and each source is away from including being located on corresponding test surfaces
The 1st acoustic receiver, the 2nd acoustic receiver to N acoustic receiver of different direction, the 1st sound wave connects on same test surfaces
Device is received to N acoustic receiver according to being evenly arranged on the same circumference clockwise, and corresponding n-th sound wave of each test surfaces connects
It receives device and is located at the same orientation, n=1,2 ... N, which comprises
Obtain corresponding first sound wave of each acoustic receiver on each test surfaces, wherein the first sound wave is acoustic receiver reception
Sound wave signal；
It is filtered, is obtained each described using stratum longitudinal wave FIR filter first sound wave corresponding to each acoustic receiver
The corresponding stratum longitudinal wave of first sound wave；
The stratum longitudinal wave of the stratum longitudinal wave of direct wave in the corresponding stratum longitudinal wave of each first sound wave and back wave is carried out
Related coefficient calculates, and obtains corresponding time when correlation function takes maximum, then using the time as back wave, Mei Ge
The corresponding back wave of one sound wave is then；
Acquisition is located at the summation of the corresponding back wave of corresponding first sound wave of each acoustic receiver in same orientation then, Mei Gefang
The summation of the corresponding back wave in position then；
According to the orientation of the corresponding back wave of different direction summation then and the 1st acoustic receiver, construction by well is obtained
Orientation.
2. the method according to claim 1, wherein in use stratum longitudinal wave FIR filter to each acoustic receiver
Corresponding first sound wave of device is filtered, and before obtaining the corresponding stratum longitudinal wave of each first sound wave, the method is also
Include:
For each test surfaces, the wave-shape amplitude of corresponding first sound wave of acoustic receiver each on same test surfaces is weighted
It is average, obtain the second sound wave；Wherein, the second sound wave includes stratum longitudinal wave；
The slowness of stratum longitudinal wave is obtained according to the second sound wave on all test surfaces using slowness time coherence；
Frequency dispersion figure is obtained according to the second sound wave on all test surfaces using frequency dispersion separation method, second sound wave includes
Each mode wave is distributed at the different location on the frequency dispersion figure, and the ordinate of the frequency dispersion figure is slowness, and abscissa is frequency；
According to the slowness of the stratum longitudinal wave and the frequency dispersion figure, the target frequency of stratum longitudinal wave is determined；
According to the target frequency, stratum longitudinal wave FIR filter is obtained.
3. the method according to claim 1, wherein described according to the corresponding back wave of different direction then total
With the orientation with the 1st acoustic receiver, the orientation constructed by well is obtained, comprising:
The corresponding back wave of the first sound wave that receives according to sequence from small to large to acoustic receiver in all directions is then
Summation is ranked up；
The side constructed by the well is determined according to the orientation of the sequence of the summation of each back wave then and the 1st acoustic receiver
Position.
4. according to the method described in claim 3, it is characterized in that, same test surfaces include 4 or 6 acoustic receivers
Device；
The sequence and the orientation of the 1st acoustic receiver of the summation according to each back wave then determine the orientation constructed by well
Include:
If the summation of each back wave then is all different, and the difference of the summation of the back wave of sequence first and second then does not exist
Within the scope of preset difference value, the corresponding orientation of summation of each back wave of the sequence first then is the side of the i-th acoustic receiver
Position, according to the orientation of the first receiver obtain the i-th acoustic receiver orientation, using the orientation of i-th acoustic receiver as
The orientation constructed by the well；
If the summation of each back wave then is all different, and the difference of the summation of the back wave of sequence first and second then is pre-
If in difference range, the corresponding orientation of summation of each back wave of the sequence first then is the orientation of the i-th acoustic receiver,
The corresponding orientation of summation of each back wave of the sequence second then is the orientation of jth acoustic receiver, according to described first
The orientation of receiver determines the orientation of i-th acoustic receiver and jth acoustic receiver middle position, by the centre
The orientation of position is as the orientation constructed by the well；
Wherein, 1≤i≤N, 1≤j≤N, i, j are positive integer.
5. according to the method described in claim 4, it is characterized in that, same test surfaces include 8 acoustic receivers；
The sequence and the orientation of the 1st acoustic receiver of the summation according to each back wave then determine the orientation constructed by well
Include:
If the summation of each back wave then is all different, the corresponding orientation of summation of each back wave of the sequence first then is
The orientation of i-th acoustic receiver obtains the orientation of the i-th acoustic receiver according to the orientation of first receiver, by the i-th sound wave
The orientation of receiver is as the orientation constructed by the well.
6. the method according to claim 3 or 4, which is characterized in that in the suitable of the summation according to each back wave then
After sequence and the orientation of the 1st acoustic receiver determine the orientation constructed by well, the method also includes:
The trend constructed by the well is obtained, the trend constructed by the well refers to the inverse time of construction and direct north by the well
Needle angle.
7. the method according to claim 1, wherein described by the corresponding stratum longitudinal wave of each first sound wave
In the stratum longitudinal wave of direct wave and the stratum longitudinal wave of back wave carry out related coefficient calculating, when obtaining correlation function and taking maximum
Before the corresponding time, further includes:
Using the method for wave field separation separate the direct wave in the corresponding stratum longitudinal wave of each first sound wave stratum longitudinal wave and
The stratum longitudinal wave of back wave.
8. the method according to claim 1, wherein the corresponding sound source of the pinger is the undirected spoke of single-stage
Penetrate sound source.
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