CN110109180B - Amplitude logarithm display method and system for azimuthal acoustic well cementation quality well logging - Google Patents
Amplitude logarithm display method and system for azimuthal acoustic well cementation quality well logging Download PDFInfo
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Abstract
The invention provides an amplitude logarithm display method and system for azimuthal acoustic well cementation quality well logging, which comprises the following steps: obtaining effective waveform data of different directions of the same source distance of each effective depth point of the azimuthal acoustic well cementation quality logging; respectively calculating and generating a head wave amplitude value, a logarithm value of an amplitude mean value and a head wave amplitude maximum value of each channel of waveform data by utilizing a head wave windowing; calculating and generating an imaging color code modulation amplitude of each effective waveform data corresponding to each effective depth point according to a logarithmic value of a head wave amplitude mean value, a head wave amplitude maximum value and a head wave amplitude value of each azimuth corresponding to each effective depth point; and carrying out logging imaging display according to the imaging color code modulation amplitude of each effective waveform data and a preset color code. The method can fully present the amplitude difference of the head wave amplitude of the azimuth acoustic logging in the depth direction and the circumferential direction, more intuitively display the position of the channeling groove, and is more effective particularly when the head wave amplitude values in different azimuths have certain difference but the numerical value is generally smaller.
Description
Technical Field
The invention relates to the technical field of geophysical exploration of petroleum and natural gas, in particular to an amplitude logarithm display method and system for azimuthal acoustic wave well cementation quality well logging.
Background
The evaluation of the well cementation quality depends on the difference of the sound wave response amplitude from a casing-cement interface and a cement-stratum interface, and is a very important link in the development of an oil field, and the determination of the channeling direction is the difficulty of the evaluation of the well cementation quality.
The well cementation quality evaluation well logging techniques that are widely used at present are acoustic amplitude logging (CBL) and Variable Density Logging (VDL). Because the CBL/VDL uses a transducer which vibrates symmetrically, the measurement result has no azimuth detection capability. A sector cement bond tester (SBT) adopts 12 ultrasonic transducers on 6 polar plates to evaluate the cement bond quality, the detector can only evaluate the bond quality of an interface I but the azimuth resolution reaches 60 degrees, and variable density logging is still used for evaluating the bond quality of an interface II.
In the prior art, the schlumberger company develops a new generation of Isolation Scanner for well cementation quality, and the instrument simultaneously applies the reflection and refraction principles of ultrasonic waves and improves the evaluation accuracy of the well cementation quality of light cement. The processing of the measured data is relatively complex due to the mechanical rotation means involved. The underground instrument adopts a dipole sound source, so that the detection capability of the through-casing stratum can be effectively improved, but the underground instrument is not suitable for being used in cement cementing quality evaluation.
The georgia et al put forward a novel underground sound wave transmitting transducer in 2006, researches the radiation directivity of a phased arc array sound wave radiator and the sound fields radiated in a barefoot well and a sleeve well, and research results show that: the phased arc array acoustic radiator has the advantages that the traditional monopole sound source cannot compare with the traditional monopole sound source in the aspect of azimuth characteristics, and the novel sound source with the azimuth radiation characteristics can be applied to a cased well to bring innovation of the azimuth logging technology in the cased well. Therefore, according to the requirements of field application, the technical inspiration of further applying the phased arc array radiator to the azimuth cementing quality logging instrument is obtained. However, the radiation characteristics of the completely new phased arc array acoustic radiator are obviously different from those of the conventional monopole and dipole sound sources, so that the method for processing and displaying the logging data of the conventional sound source cannot be directly used during related data processing, and the position of the operation by change cannot be accurately determined.
Therefore, how to provide an imaging display method suitable for the directional acoustic wave well cementation quality logging information based on the phased arc array acoustic radiator so as to determine the position of the channeling operation is a technical problem to be solved urgently, especially when the first wave amplitude value of the waveform has a certain difference but the amplitude value is generally small.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides an amplitude logarithmic display method and an amplitude logarithmic display system for azimuthal sound wave well cementation quality well logging, which can fully display the difference between a plurality of waveforms with the same fixed source distance at the same depth point in different azimuths, and can solve the problem that very small amplitude values are annihilated when the waveforms with different depths are displayed longitudinally, so that the display effect is more obvious when the same color scale and the same measuring range are adopted, and the channeling can be distinguished more intuitively and clearly by combining a head wave amplitude average value curve, thereby having the beneficial effect of determining the position of the channeling more intuitively and accurately, particularly when the head wave amplitude values of the waveforms in different azimuths have certain difference but the amplitude values are generally smaller.
In order to achieve the purpose, the invention provides an amplitude logarithm display method of azimuthal acoustic well cementation quality logging, which comprises the following steps:
acquiring effective depth points of azimuth acoustic well cementation quality well logging and effective waveform data of different azimuths of the same source distance corresponding to each effective depth point;
according to the effective waveform data corresponding to each effective depth point, respectively calculating and generating a head wave amplitude value of the effective waveform data corresponding to each effective depth point, a logarithm value of a head wave amplitude mean value of each effective depth point and a head wave amplitude maximum value by utilizing a head wave windowing;
calculating and generating an imaging color code modulation amplitude of each effective waveform data corresponding to each effective depth point according to a logarithm value of the head wave amplitude mean value corresponding to each effective depth point, the head wave amplitude maximum value and a head wave amplitude value of each effective waveform data;
and carrying out logging imaging display according to the imaging color code modulation amplitude of each effective waveform data and a preset color code.
The invention also provides an amplitude logarithm display system for the azimuthal acoustic well cementation quality well logging, which comprises the following components:
the acquisition unit is used for acquiring effective depth points of the azimuthal acoustic well cementation quality well logging and effective waveform data of different azimuths of the same source distance corresponding to each effective depth point;
a windowing unit, configured to respectively calculate and generate a head wave amplitude value of each effective waveform data corresponding to each effective depth point, a logarithm value of a head wave amplitude mean value of each effective depth point, and a head wave amplitude maximum value by using a head wave windowing according to each effective waveform data corresponding to each effective depth point;
a calculating unit, configured to calculate and generate an imaging color scale modulation amplitude of each effective waveform data corresponding to each effective depth point according to a logarithmic value of the head wave amplitude mean value, the head wave amplitude maximum value, and a head wave amplitude value of each effective waveform data corresponding to each effective depth point;
and the imaging unit is used for carrying out logging imaging according to the imaging color code modulation amplitude of each effective waveform data and a preset color code.
The invention provides an amplitude logarithm display method and system for azimuthal acoustic well cementation quality well logging, which comprises the following steps: acquiring effective depth points of azimuth acoustic well cementation quality well logging and effective waveform data of different azimuths of the same source distance corresponding to each effective depth point; respectively calculating and generating a head wave amplitude value of each effective waveform data corresponding to each effective depth point, a logarithm value of a head wave amplitude mean value of each effective depth point and a head wave amplitude maximum value by utilizing head wave windowing according to each effective waveform data corresponding to each effective depth point; calculating and generating an imaging color code modulation amplitude of each effective waveform data corresponding to each effective depth point according to a logarithm value of the head wave amplitude mean value corresponding to each effective depth point, the head wave amplitude maximum value and a head wave amplitude value of each effective waveform data; and carrying out logging imaging display according to the imaging color code modulation amplitude of each effective waveform data and a preset color code. The method and the device can fully present the amplitude difference of the head wave amplitude of the azimuth acoustic logging in the depth direction and the circumferential direction, have the beneficial effect of determining the position of the drilling operation more intuitively and accurately, and are particularly more effective when the head wave amplitude values of the waveforms in different azimuths have certain difference but the amplitude values are generally smaller.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an amplitude log display method of azimuthal acoustic cementing quality log of the present application;
FIG. 2 is a flow chart of an amplitude log display method of azimuthal acoustic cementing quality log in an embodiment of the present application;
FIG. 3 is a graph of amplitude linearity for a set of data of the prior art;
FIG. 4 is a graph showing log amplitude of a set of data in an embodiment of the present application;
FIG. 5 is a prior art amplitude linear imaging plot;
FIG. 6 is a magnitude log imaging plot in an embodiment of the present application;
FIG. 7 is a schematic diagram of an amplitude log display system of an azimuthal acoustic cementing quality log of the present application;
fig. 8 is a schematic structural diagram of an acquisition unit in an embodiment of the present application;
fig. 9 is a schematic structural diagram of a computing unit in an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As used herein, the terms "first," "second," … …, etc. do not denote any order or order, nor are they used to limit the invention, but rather are used to distinguish one element from another element or operation described by the same technical terms.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
As used herein, "and/or" includes any and all combinations of the described items.
Aiming at the defects in the prior art, the invention provides an amplitude logarithm display method for azimuthal acoustic wave well cementation quality well logging, the flow chart of which is shown in figure 1, and the method comprises the following steps:
s101: and obtaining effective depth points of the azimuth acoustic well cementation quality well logging and effective waveform data of different azimuths of the same source distance corresponding to each effective depth point.
S102: and respectively calculating and generating a head wave amplitude value of each effective waveform data corresponding to each effective depth point, a logarithm value of a head wave amplitude mean value of each effective depth point and a head wave amplitude maximum value by utilizing head wave windowing according to each effective waveform data corresponding to each effective depth point.
S103: and calculating to generate an imaging color code modulation amplitude of each effective waveform data corresponding to each effective depth point according to the logarithm value of the head wave amplitude mean value corresponding to each effective depth point, the head wave amplitude maximum value and the head wave amplitude value of each effective waveform data.
S104: and carrying out logging imaging display according to the imaging color code modulation amplitude of each effective waveform data and a preset color code.
As can be seen from the process shown in fig. 1, according to the obtained effective waveform data corresponding to each effective depth point, the method calculates and generates a head wave amplitude value of each effective waveform data corresponding to each effective depth point, a logarithm value of a head wave amplitude mean value of each effective depth point, and a head wave amplitude maximum value by using a head wave windowing; calculating and generating an imaging color code modulation amplitude of each effective waveform data corresponding to each effective depth point according to the logarithm value of the head wave amplitude mean value corresponding to each effective depth point, the head wave amplitude maximum value and the head wave amplitude value of each effective waveform data; and finally, carrying out logging imaging according to the imaging color code modulation amplitude of each effective waveform data and a preset color code. The difference between the longitudinal first wave amplitude can be well reflected by the difference between the circumferential first wave amplitudes, the display effect is more obvious under the conditions that the same color scale and the same measuring range are adopted, and the fleeing operation can be more visually and clearly distinguished by combining the first wave amplitude average value curve, so that the beneficial effect of more visually and accurately determining the fleeing operation position is achieved, and the difference is more effective when the first wave amplitude values of the waveforms in different directions have certain difference but the amplitude values are generally smaller.
In order to make the present invention better understood by those skilled in the art, a more detailed embodiment is listed below, as shown in fig. 2, an embodiment of the present invention provides a magnitude log display method for azimuthal acoustic cementing quality log, the method comprising the following steps:
s201: and obtaining effective depth points of the azimuth acoustic well cementation quality well logging and effective waveform data of different azimuths of the same source distance corresponding to each effective depth point.
Wherein, a plurality of transducers which are uniformly arranged along the circumferential direction are arranged in the azimuth acoustic wave well cementation quality logging.
In specific implementation, each effective waveform data corresponding to each effective depth point is specifically 8 waveform data of 8 different directions of the same source distance and different directions corresponding to each effective depth point.
The specific execution of step S201 includes the following steps:
s301: and acquiring initial depth points of the azimuth acoustic well cementation quality well logging and initial waveform data of different azimuths of the same source distance corresponding to each effective depth point.
S302: and initializing each initial depth point to generate each effective depth point.
S303: initializing each initial waveform data corresponding to each effective depth point to generate each effective waveform data corresponding to each effective depth point.
Wherein the initializing comprises: denoising and/or de-gaining, etc., which should not be construed as a limitation in the present application.
S202: and respectively calculating and generating a head wave amplitude value of each effective waveform data corresponding to each effective depth point, a logarithm value of a head wave amplitude mean value of each effective depth point and a head wave amplitude maximum value by utilizing head wave windowing according to each effective waveform data corresponding to each effective depth point.
S203: and calculating to generate an imaging color code modulation amplitude of each effective waveform data corresponding to each effective depth point according to the logarithm value of the head wave amplitude mean value corresponding to each effective depth point, the head wave amplitude maximum value and the head wave amplitude value of each effective waveform data.
The specific execution of step S203 includes the following steps:
s401: and acquiring a preset amplitude weighting coefficient corresponding to each effective depth point.
S402: and logarithm is taken on the head wave amplitude mean value corresponding to each effective depth point to generate an amplitude logarithm value of each effective depth point.
In specific implementation, in this embodiment, the head wave amplitude mean y corresponding to the serial number of each effective depth point1And the amplitude logarithm value y corresponding to the serial number of each effective depth point2As shown in table 1. Wherein, y2＝log(y1)。
TABLE 1
| Number of significant depth points | Mean value y of head wave amplitude1 | Amplitude logarithm y2＝log(y1) |
| 1 | 1 | 0.00 |
| 2 | 3 | 0.48 |
| 3 | 10 | 1.00 |
| 4 | 24 | 1.38 |
| 5 | 100 | 2.00 |
| 6 | 320 | 2.51 |
| 7 | 1000 | 3.00 |
| 8 | 1346 | 3.13 |
| 9 | 78 | 1.89 |
| 10 | 1980 | 3.30 |
| 11 | 45 | 1.65 |
| 12 | 4020 | 3.60 |
| 13 | 10000 | 4.00 |
| 14 | 11040 | 4.04 |
| 15 | 100000 | 5.00 |
S403: and respectively quoting the head wave amplitude values corresponding to the effective depth points and the head wave amplitude maximum values corresponding to the effective depth points to generate amplitude ratios of the effective waveform data corresponding to the effective depth points.
S404: and generating the imaging color code modulation amplitude of each effective waveform data corresponding to each effective depth point according to the product of the preset amplitude weighting coefficient, the amplitude logarithm value and the amplitude ratio of each effective waveform data of each effective depth point. In specific implementation, the formula for calculating the modulation amplitude of the imaging color scale of each effective waveform data corresponding to each effective depth point is shown in formula (1):
the method comprises the steps of obtaining a first effective waveform data corresponding to each effective depth point, obtaining an imaging color code modulation amplitude value of the ith effective waveform data corresponding to each effective depth point, obtaining a preset amplitude weighting coefficient corresponding to each effective depth point by using the AmpILog (i), obtaining an average value of head wave amplitudes of all directions corresponding to each effective depth point by using the AmpMax (Max) (i)), obtaining a head wave amplitude maximum value corresponding to each effective depth point by using the AmpMax (amp (i)), obtaining head wave amplitude values of the ith effective waveform data of different directions corresponding to each effective depth point by using the AmpILog (i), and obtaining a.
S204: and carrying out logging imaging display according to the imaging color code modulation amplitude, the preset color code and the preset range of each effective waveform data.
Fig. 3 is a graph showing the amplitude linearity of the prior art, and fig. 4 is a graph showing the amplitude logarithm in the present embodiment. As can be seen by comparing fig. 3 and 4, the logarithmic magnitude display employed in the present application can adequately demonstrate the differences between different effective waveform data by different colors. Therefore, when the amplitude logarithm display method of the azimuthal acoustic wave well cementation quality well logging is applied to well cementation quality well logging imaging display, different cementation states can be faithfully displayed, and misjudgment is avoided.
Fig. 5 is a graph showing the amplitude linearity of the prior art, and fig. 6 is a graph showing the amplitude logarithm of the present application. As shown in fig. 5, the first track, the second track, the third track and the fourth track are sequentially from left to right, where the first track is a depth segment of an effective depth point of 3-10 meters, the second track is a linear display graph of a head wave amplitude of the prior art, the third track is a linear normalization display graph of a head wave amplitude of the prior art, normalization is performed by using formula (2), and the fourth track is a head wave amplitude distribution graph (AMP) of 8 directions of the present application and a head wave amplitude mean value (AMPAVG, AMP average) of each effective depth point. As shown in fig. 6, the 1 st track, the 2 nd track and the 3 rd track are sequentially from left to right, where the 1 st track is 3-10 meters of a depth section of an effective depth point, the 2 nd track is amplitude logarithmic display of head wave amplitude of the present application, the 3 rd track is a head wave amplitude distribution diagram (AMP) of 8 orientations of the present application, a head wave amplitude mean value (AMPAVG, AMP average) of each effective depth point, and head wave amplitude values and head wave amplitude mean value AMPAVG curves of 8 waveforms of 8 different orientations of 3-10 meters of the depth section of the current effective depth point can be clearly distinguished through the 3 rd track in fig. 6. As can be seen from comparison between fig. 5 and fig. 6, the normalized imaging graph of the head wave amplitude linear display method in the prior art cannot reflect the difference of the head wave amplitude values between different depths and different orientations. By adopting the log display of the head wave amplitude of the amplitude log display method for the azimuth acoustic well cementation quality well logging, the difference between the head wave amplitude values received by receivers in different azimuths at the same effective depth point is reflected by calculating the magnitude of the relative value between the head wave amplitude value of 8 waveforms of each effective depth point and the maximum value of the head wave amplitude.
The method comprises the steps of performing linear display on head wave amplitude (AMPMAPI), performing linear normalization display on head wave amplitude (AMPMAPINOM), performing logarithmic display on head wave amplitude (AMPMAPLOG), performing head wave amplitude distribution graph (AMP) in 8 directions, and performing head wave amplitude mean value (AMPAVG, AMP average) of each effective depth point.
In the linear normalization display method in the prior art, the calculation method shown in formula (2) is adopted to normalize and image the head wave amplitude:
AmpINom(i)＝Amp(i)/AmpMax (2)
when the first wave amplitude values amp (i) of 8-channel waveforms at different azimuths of a certain depth point are relatively close, amp (i) is relatively close to the value of AmpMax, and amp (i)/AmpMax is very close to 1, so that the amplitude difference between the 8-channel waveforms cannot be presented.
By adopting the amplitude logarithmic display method for the azimuthal acoustic well cementation quality well logging, disclosed by the invention, the magnitude of the relative value between the head wave amplitude value and the head wave amplitude maximum value of 8 waveforms in different directions of the same effective depth point is calculated, and the relative value is multiplied by the logarithmic value of the head wave amplitude average value of the 8 waveforms in different directions, after the waveform data of each effective depth point is processed, the imaging display is carried out by adopting the same color scale and the same measuring range, so that the obvious advantage is achieved, the imaging graph fully displays the mutual difference of the 8 waveforms in the same depth point in different directions, and meanwhile, the problem that the very small amplitude value is annihilated during the amplitude linear imaging longitudinal display in the prior art can be solved. According to the invention, through the amplitude logarithmic display method of the azimuthal acoustic well cementation quality well logging, the display effect of the difference between the head wave amplitudes of longitudinally different effective depth points is more obvious, the difference between a large amplitude and a small amplitude is fully displayed, and the method has the beneficial effects that the difference between the circumferential head wave amplitudes can be reflected, the difference between the longitudinal head wave amplitudes can also be well reflected, and meanwhile, the channeling operation position can be more intuitively and clearly determined by combining with the head wave amplitude average value curve.
Based on the same application concept as the amplitude logarithm display method of the azimuthal acoustic wave well cementation quality well logging, the invention also provides an amplitude logarithm display system of the azimuthal acoustic wave well cementation quality well logging, which is described in the following embodiment. The principle of solving the problems of the amplitude logarithm display system of the azimuth acoustic wave well cementation quality well logging is similar to the amplitude logarithm display method of the azimuth acoustic wave well cementation quality well logging, so the implementation of the amplitude logarithm imaging system of the azimuth acoustic wave well cementation quality well logging can refer to the implementation of the amplitude logarithm display method of the azimuth acoustic wave well cementation quality well logging, and repeated parts are not repeated.
FIG. 7 is a schematic structural diagram of an amplitude log display system for azimuthal acoustic cementing quality logging according to an embodiment of the present application. As shown in fig. 7, the log-amplitude display system for azimuthal acoustic cementing quality log comprises: an acquisition unit 101, a windowing unit 102, a calculation unit 103, and an imaging unit 104.
The acquiring unit 101 is configured to acquire effective depth points of the azimuthal acoustic cementing quality well logging and effective waveform data of different azimuths of the same source distance corresponding to each effective depth point.
And a windowing unit 102, configured to respectively calculate and generate a head wave amplitude value of each effective waveform data corresponding to each effective depth point, a logarithm value of a head wave amplitude mean value of each effective depth point, and a head wave amplitude maximum value by using head wave windowing according to each effective waveform data corresponding to each effective depth point.
And the calculating unit 103 is configured to calculate and generate an imaging color scale modulation amplitude of each effective waveform data corresponding to each effective depth point according to the logarithm value of the head wave amplitude mean value corresponding to each effective depth point, the head wave amplitude maximum value, and the head wave amplitude value of each effective waveform data.
And the imaging unit 104 is configured to perform logging imaging display according to the imaging color scale modulation amplitude of each effective waveform data and a preset color scale.
In one embodiment, as shown in fig. 8, the obtaining unit 101 includes: an acquisition module 201, a first initialization module 202 and a second initialization module 203.
The acquiring module 201 is configured to acquire initial depth points of the azimuthal acoustic cementing quality well logging and initial waveform data of different azimuths of the same source distance corresponding to each effective depth point.
The first initialization module 202 is configured to initialize each initial depth point to generate each valid depth point.
The second initialization module 203 is configured to initialize each initial waveform data corresponding to each effective depth point to generate each effective waveform data corresponding to each effective depth point.
Wherein the initializing comprises: denoising and/or de-gaining.
In one embodiment, as shown in fig. 9, the calculation unit 103 includes: a coefficient acquisition module 301, a logarithm taking module 302, a quotient module 303 and a product making module 304.
A coefficient obtaining module 301, configured to obtain a preset amplitude weighting coefficient corresponding to each effective depth point.
And a logarithm taking module 302, configured to take a logarithm of the head wave amplitude mean value corresponding to each effective depth point to generate an amplitude logarithm value of each effective depth point.
The quotient module 303 is configured to quotient the head wave amplitude values corresponding to each effective depth point and the head wave amplitude maximum values corresponding to each effective depth point respectively to generate an amplitude ratio of each effective waveform data corresponding to each effective depth point.
And a product making module 304, configured to generate an imaging color scale modulation amplitude of each effective waveform data corresponding to each effective depth point according to a product of the preset amplitude weighting coefficient, the amplitude logarithm value, and the amplitude ratio of each effective waveform data of each effective depth point.
The invention provides an amplitude logarithm display method and system for azimuthal acoustic well cementation quality well logging, which comprises the following steps: obtaining effective depth points of the azimuth acoustic well cementation quality well logging and effective waveform data of different azimuths of the same source distance corresponding to each effective depth point; according to each effective waveform data corresponding to each effective depth point, respectively calculating and generating a head wave amplitude value of each effective waveform data corresponding to each effective depth point, a logarithm value of a head wave amplitude mean value of each effective depth point and a head wave amplitude maximum value by utilizing head wave windowing; calculating and generating an imaging color code modulation amplitude of each effective waveform data corresponding to each effective depth point according to a logarithmic value of a head wave amplitude mean value corresponding to each effective depth point, a head wave amplitude maximum value and a head wave amplitude value of each effective waveform data; and carrying out logging imaging display according to the imaging color code modulation amplitude of each effective waveform data and a preset color code. According to the invention, through the amplitude logarithmic display method of the azimuthal acoustic well cementation quality well logging, the display effect of the difference between the head wave amplitudes of longitudinal different effective depth points is more obvious, the difference between a large amplitude and a small amplitude is fully displayed, the method has the beneficial effects that the difference between the circumferential head wave amplitudes can be reflected, the difference between the longitudinal head wave amplitudes can also be well reflected, meanwhile, the channeling position can be more intuitively and clearly determined by combining a head wave amplitude average value curve, and the method is more effective especially when the head wave amplitude values of waveforms in different azimuths have certain difference but the amplitude values are generally smaller.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The principle and the implementation mode of the invention are explained by applying specific embodiments in the invention, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (8)
1. An amplitude logarithm display method for azimuthal acoustic well cementation quality well logging is characterized by comprising the following steps:
acquiring effective depth points of azimuth acoustic well cementation quality well logging and effective waveform data of different azimuths of the same source distance corresponding to each effective depth point;
according to the effective waveform data corresponding to each effective depth point, respectively calculating and generating a head wave amplitude value of the effective waveform data corresponding to each effective depth point, a logarithm value of a head wave amplitude mean value of each effective depth point and a head wave amplitude maximum value by utilizing a head wave windowing;
calculating and generating an imaging color code modulation amplitude of each effective waveform data corresponding to each effective depth point according to a logarithm value of the head wave amplitude mean value corresponding to each effective depth point, the head wave amplitude maximum value and a head wave amplitude value of each effective waveform data;
carrying out logging imaging display according to the imaging color code modulation amplitude of each effective waveform data and a preset color code;
the generating of the imaging color scale modulation amplitude of each effective waveform data corresponding to each effective depth point according to the logarithm value of the head wave amplitude mean value, the head wave amplitude maximum value and the head wave amplitude value of each effective waveform data corresponding to each effective depth point by calculation includes:
acquiring a preset amplitude weighting coefficient corresponding to each effective depth point;
taking the logarithm of the head wave amplitude mean value corresponding to each effective depth point to generate an amplitude logarithm value of each effective depth point;
respectively making quotient of each head wave amplitude value corresponding to each effective depth point and the head wave amplitude maximum value corresponding to each effective depth point to generate an amplitude ratio of each effective waveform data corresponding to each effective depth point;
and generating an imaging color code modulation amplitude value of each effective waveform data corresponding to each effective depth point according to the product of the preset amplitude weighting coefficient, the amplitude logarithm value and the amplitude ratio of each effective waveform data of each effective depth point.
2. The amplitude log display method of the azimuthal acoustic wave well cementation quality log according to claim 1, wherein the obtaining of effective depth points of the azimuthal acoustic wave well cementation quality log and effective waveform data of different directions of a same source distance corresponding to each effective depth point comprises:
acquiring initial depth points of the azimuthal acoustic well cementation quality well logging and initial waveform data of different azimuths of the same source distance corresponding to each effective depth point;
initializing each initial depth point to generate each effective depth point;
initializing each initial waveform data corresponding to each effective depth point to generate each effective waveform data corresponding to each effective depth point;
wherein the initializing comprises: denoising and/or de-gaining.
3. The amplitude logarithm display method of azimuthal acoustic wave well cementation quality logging according to claim 1, wherein an imaging color scale modulation amplitude calculation formula of each effective waveform data corresponding to each effective depth point is as follows:
the ampilog (i) is an imaging color scale modulation amplitude of ith effective waveform data corresponding to each effective depth point, a is a preset amplitude weighting coefficient corresponding to each effective depth point, AmpAvg is an average value of head wave amplitudes of each azimuth corresponding to each effective depth point, AmpMax (Max (i)) is a head wave amplitude maximum value corresponding to each effective depth point, amp (i) is a head wave amplitude value of ith effective waveform data of each azimuth corresponding to each effective depth point, and i is a positive integer greater than or equal to 1.
4. The amplitude logarithm display method of the azimuthal acoustic wave well cementation quality log according to any one of claims 1 to 3, wherein each effective waveform data corresponding to each effective depth point is specifically 8 waveform data of different directions of the same source distance corresponding to each effective depth point.
5. The log-amplitude display method of the azimuthal acoustic wave cementing quality log according to claim 1, wherein a plurality of receiving transducers uniformly arranged along a circumference are arranged in the azimuthal acoustic wave cementing quality log.
6. An amplitude log display system of azimuthal acoustic cementing quality log, comprising:
the acquisition unit is used for acquiring effective depth points of the azimuthal acoustic well cementation quality well logging and effective waveform data of different azimuths of the same source distance corresponding to each effective depth point;
a windowing unit, configured to respectively calculate and generate a head wave amplitude value of each effective waveform data corresponding to each effective depth point, a logarithm value of a head wave amplitude mean value of each effective depth point, and a head wave amplitude maximum value by using a head wave windowing according to each effective waveform data corresponding to each effective depth point;
a calculating unit, configured to calculate and generate an imaging color scale modulation amplitude of each effective waveform data corresponding to each effective depth point according to a logarithmic value of the head wave amplitude mean value, the head wave amplitude maximum value, and a head wave amplitude value of each effective waveform data corresponding to each effective depth point;
the imaging unit is used for carrying out logging imaging display according to the imaging color code modulation amplitude of each effective waveform data and a preset color code;
the calculation unit includes:
the coefficient acquisition module is used for acquiring a preset amplitude weighting coefficient corresponding to each effective depth point;
a logarithm taking module, configured to take a logarithm of the head wave amplitude mean value corresponding to each effective depth point to generate an amplitude logarithm value of each effective depth point;
the quotient module is used for respectively making quotient of each head wave amplitude value corresponding to each effective depth point and the head wave amplitude maximum value corresponding to each effective depth point to generate an amplitude ratio of each effective waveform data corresponding to each effective depth point;
and the product making module is used for generating an imaging color code modulation amplitude of each effective waveform data corresponding to each effective depth point according to the product of the preset amplitude weighting coefficient, the amplitude logarithm value and the amplitude ratio of each effective waveform data of each effective depth point.
7. The amplitude log display system of the azimuthal acoustic cementing quality log of claim 6, wherein the acquisition unit comprises:
the acquisition module is used for acquiring initial depth points of the azimuthal acoustic well cementation quality well logging and initial waveform data of different azimuths of the same source distance corresponding to each effective depth point;
the first initialization module is used for initializing each initial depth point to generate each effective depth point; and
a second initialization module, configured to initialize each of the initial waveform data corresponding to each of the effective depth points to generate each of the effective waveform data corresponding to each of the effective depth points;
wherein the initializing comprises: denoising and/or de-gaining.
8. The amplitude log display system for azimuthal acoustic wave well cementation quality logging according to claim 6 or 7, wherein each effective waveform data corresponding to each effective depth point is 8 waveform data of different azimuths of the same source distance corresponding to each effective depth point.
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