Well cementation quality evaluation method and device based on sound wave amplitude and electronic equipment

Abstract

The invention discloses a well cementation quality evaluation method and device based on sound wave amplitude and electronic equipment. The method comprises the following steps: determining a target casing wave amplitude and a target stratum wave amplitude corresponding to a to-be-evaluated rock sample based on a sound wave signal transmitted in the to-be-evaluated rock sample, and determining a target cementation degree of the to-be-evaluated rock sample based on the target casing wave amplitude, the target stratum wave amplitude and a pre-constructed cementation degree-sound wave amplitude function; wherein the cementation degree-sound wave amplitude function is used for indicating a corresponding relation between the cementation degree and the sound wave amplitude of the rock sample to be evaluated; and determining the well cementation quality of the to-be-evaluated rock sample according to the target cementation degree. The technical problem that the well cementation quality cannot be quantitatively evaluated in the prior art is solved, and quantitative evaluation of the well cementation quality through the sound wave amplitude is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of cementing quality evaluation, and in particular to a cementing quality evaluation method, device and electronic equipment based on acoustic wave amplitude. Background Art

[0002] With the vigorous development of tight oil and gas reservoir exploration and development, the number of oil wells has increased greatly. Although the acoustic amplitude is used for evaluation after cementing, the existing evaluation methods are mostly based on the change of acoustic amplitude for semi-quantitative or qualitative evaluation, and there is no quantitative evaluation of the bonding degree between cement sheath and casing and formation, so it is difficult to quantitatively evaluate the cementing quality by measuring the acoustic amplitude.

[0003] During the cementing process, due to the complexity of the wellbore environment, it is difficult for the cementing fluid to completely bond with the casing and formation in some layers, and there are even some gaps in the cement sheath. Existing cementing quality evaluation methods are mostly focused on the evaluation of the first interface (casing and cement sheath) and the second interface (cement sheath and formation), and three qualitative conclusions of good, medium and poor are given. There is no indoor theoretical basis for the quantification of the bonding degree of the first and second interfaces, and the quantitative relationship between the change in the amplitude of the casing wave and the formation wave and the bonding area of ​​the first and second interfaces has not been established, and there is no indoor experimental device for cementing quality evaluation.

[0004] None of the existing patents have solved the problem of quantitative evaluation of the bonding area of ​​the first and second interfaces of indoor cementing. At present, there is no indoor evaluation method for cementing quality based on acoustic wave amplitude, and there is still a blank in the experimental device for studying cementing quality evaluation. The lack of this method and experimental device has greatly limited the quantitative evaluation and promotion of cementing quality acoustic wave amplitude. Summary of the invention

[0005] The invention provides a cementing quality evaluation method, device and electronic equipment based on acoustic wave amplitude, so as to realize quantitative evaluation of cementing quality through acoustic wave amplitude.

[0006] According to one aspect of the present invention, a cementing quality evaluation method based on acoustic wave amplitude is provided, comprising:

[0007] Determining a target casing wave amplitude and a target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagating in the rock sample to be evaluated;

[0008] Determine the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and a pre-constructed cementation degree-acoustic wave amplitude function; wherein the cementation degree-acoustic wave amplitude function is used to indicate the corresponding relationship between the cementation degree and the acoustic wave amplitude of the rock sample to be evaluated;

[0009] The cementing quality of the rock sample to be evaluated is determined according to the target cementation degree.

[0010] According to another aspect of the present invention, there is provided a cementing quality evaluation device based on acoustic wave amplitude, comprising:

[0011] An acoustic wave amplitude determination module, used to determine a target casing wave amplitude and a target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagated in the rock sample to be evaluated;

[0012] A cementation degree determination module is used to determine the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and a pre-constructed cementation degree-acoustic wave amplitude function; wherein the cementation degree-acoustic wave amplitude function is used to indicate the corresponding relationship between the cementation degree and the acoustic wave amplitude of the rock sample to be evaluated;

[0013] The cementing quality determination module is used to determine the cementing quality of the rock sample to be evaluated according to the target cementation degree.

[0014] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0015] at least one processor;

[0016] and a memory communicatively coupled to the at least one processor;

[0017] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the cementing quality evaluation method based on acoustic wave amplitude described in any embodiment of the present invention.

[0018] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the cementing quality evaluation method based on acoustic wave amplitude described in any embodiment of the present invention when executed.

[0019] The technical solution of the embodiment of the present invention determines the target casing wave amplitude and target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagated in the rock sample to be evaluated, and determines the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and the pre-constructed cementation degree-acoustic wave amplitude function; wherein the cementation degree-acoustic wave amplitude function is used to indicate the corresponding relationship between the cementation degree and the acoustic wave amplitude of the rock sample to be evaluated; and determines the cementing quality of the rock sample to be evaluated according to the target cementation degree. The technical problem that the cementing quality cannot be quantitatively evaluated in the prior art is solved, and the quantitative evaluation of the cementing quality through the acoustic wave amplitude is realized.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 is a flow chart of a cementing quality evaluation method based on acoustic wave amplitude provided according to Embodiment 1 of the present invention;

[0023] Figure 2 Schematic diagram of the cross section of rock samples simulating different degrees of cementation;

[0024] Figure 3 This is a schematic diagram of the indoor experimental device for cementing quality acoustic wave amplitude;

[0025] Figure 4 is a flow chart of a cementing quality evaluation method based on acoustic wave amplitude provided according to the second embodiment of the present invention;

[0026] Figure 5 The waveform diagram of the collected sound waves in the present invention;

[0027] Figure 6 It is a structural schematic diagram of a cementing quality evaluation device based on acoustic wave amplitude provided in the fourth embodiment of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of an electronic device provided according to Embodiment 5 of the present invention. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Embodiment 1

[0032] Figure 1 This is a flowchart of a cementing quality evaluation method based on acoustic wave amplitude according to the first embodiment of the present invention. This embodiment is applicable to the situation of evaluating cementing quality based on acoustic wave amplitude. The method can be performed by a cementing quality evaluation device based on acoustic wave amplitude. The device can be implemented in the form of hardware and / or software, and the device can be configured in an electronic device. Figure 1 As shown, the method includes:

[0033] S110. Determine a target casing wave amplitude and a target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagating in the rock sample to be evaluated.

[0034] In the embodiment of the present invention, the rock sample to be evaluated refers to a rock sample that needs to be evaluated for cementing quality. In this embodiment, the cementing quality of the wellbore in the rock sample to be evaluated is evaluated by evaluating the acoustic wave amplitude.

[0035] Specifically, drilling is performed on the rock sample to be evaluated, and corresponding acoustic wave signal transmitting and receiving devices are arranged in the casing, for example, an ultrasonic transmitting-receiving system, through which the acoustic wave signals propagating in the rock sample to be evaluated can be collected, and then the acoustic wave signals are processed to obtain the target casing wave amplitude and the target formation wave amplitude corresponding to the rock sample to be evaluated; the target casing wave and the target formation wave refer to the amplitudes of the acoustic waves propagating along the casing wall and along the formation, respectively.

[0036] S120: Determine the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude, and a pre-constructed cementation degree-acoustic wave amplitude function.

[0037] Among them, the cementation degree-acoustic wave function can be understood as a pre-established function used to express the relationship between the acoustic wave amplitude and the cementation degree. The target cementation degree refers to the cementation degree of the first interface and / or the second interface in the rock sample to be evaluated. The first interface is the cementation surface between the casing and the cementing fluid, and the second interface is the cementation surface between the cementing fluid and the well wall. Figure 2 , is a schematic diagram of the cross section of rock samples simulating different cementation degrees, 21 rock sample, 22 foam, 23 cement sheath, 24 casing, 25 wellbore fluid.

[0038] Specifically, after the target casing wave amplitude and the target formation wave amplitude are determined, the target casing wave amplitude and the target formation wave amplitude can be substituted into the cementation degree-acoustic wave amplitude function to obtain the target cementation degree of the rock sample to be evaluated.

[0039] On the basis of the above embodiment, before determining the target cementation degree of the rock sample to be evaluated, it also includes: emitting sound waves into the casings of the rock samples to be used with multiple different cementation degrees to determine the sound wave data corresponding to each of the rock samples to be used; determining the casing wave amplitude and formation wave amplitude corresponding to each of the rock samples to be used according to the sound wave data, and constructing the cementation degree-sound wave amplitude function based on the casing wave amplitude, formation wave amplitude and cementation degree corresponding to each of the rock samples to be used.

[0040] In this embodiment, before determining the degree of cementation of the rock sample to be evaluated, a cementation degree-acoustic wave amplitude function can be pre-constructed. The specific construction method can be: emit acoustic waves into the casing of the rock samples to be used with different degrees of cementation, and the rock samples to be used refer to large-scale dense natural rock samples collected from the field in advance; on this basis, determine the acoustic wave data corresponding to the rock samples to be used, that is, the acoustic wave data corresponding to different degrees of cementation, and process the acoustic wave data to obtain the casing wave amplitude and formation wave amplitude corresponding to the rock samples to be used. And, determine the cementation degree of the rock samples to be used with various degrees of cementation, and then construct a cementation degree-acoustic wave amplitude function, such as the corresponding functional relationship between different casing wave amplitudes and different degrees of cementation, or the corresponding functional relationship between different formation wave amplitudes and different degrees of cementation. On this basis, when it is necessary to determine the degree of cementation of the rock sample to be evaluated, directly substitute the target formation wave amplitude or target casing wave amplitude of the rock sample to be evaluated into the above function to obtain the target degree of cementation.

[0041] On the basis of the above technical solution, before emitting sound waves into the casings of the rock samples to be used with multiple different degrees of cementation, it also includes: for each of the rock samples to be used, drilling a wellbore of a preset size on the core of the rock sample to be used, and setting casing and cementing fluid in the wellbore; in the process of setting the casing and the cementing fluid, sticking foam on the contact surface between the cementing fluid and the casing, and sticking foam on the contact surface between the cementing fluid and the well wall; determining the degree of cementation of the rock sample to be used based on the sticking area of ​​the foam.

[0042] Among them, the preset size refers to the pre-set borehole size, for example, the preset size is 1 inch, 3 inches, 5 inches, etc.; collect large-scale dense natural rock samples as the rock samples to be used, drill a borehole on the core to be used, set casing and cementing fluid in the borehole, and paste foam on the contact surface of the casing and the cementing fluid during the setting process, and paste foam on the contact surface of the cementing fluid and the well wall, and simulate the cementation characteristics of the first interface and the second interface in the rock sample to be used by pasting foam. Among them, the pasting area of ​​the foam in the first interface and the second interface can be set to 50%, 75% and 100%, etc., and the degree of cementation of the rock sample to be used can be determined based on the pasting area of ​​the foam. In this embodiment, the cementation characteristics are simulated by pasting foam.

[0043] For example, a large-scale dense natural rock sample is collected from the field, cut into 90cm×30cm×30cm in length, width and height, and three small boreholes are drilled on the natural core with 1-inch, 3-inch and 5-inch drill bits. Foam is pasted on the drilled well wall and the outer wall of the casing to simulate the cementing characteristics of the first and second interfaces. According to the size of the drilled wellbore, the casing is placed, and cementing fluid is filled between the casing and the core. After being placed at high temperature for a period of time, the cement ring is bonded to the casing and the core wall. Based on this, the preparation of rock samples with different degrees of cementation to be used is completed.

[0044] Based on the above embodiments, the emission and reception of acoustic waves, and the determination of the formation wave amplitude and the casing wave amplitude are introduced: Figure 3, is a schematic diagram of an indoor experimental device for acoustic wave amplitude of cementing quality, 301—computer, 302—acoustic wave control panel, 303—acoustic wave signal transmission line (cable), 304—water tank, 305—rock sample, 306—second interface, 307—cement ring, 308—acoustic wave transmitting probe, 309—first interface, 310—casing, 311—first receiving probe, 312—second receiving probe, 313—traction rod, 314—transmission guide rail, 315—positioning push rod; in this embodiment, a single-transmitter-double-receiver indoor acoustic wave acquisition device is prepared, which has a stepper motor control system and a motor data USB input control system, and has an intelligent test instrument. Prepare an experimental water tank with a size of 200cm×80cm×80cm, place the prepared rock sample in the water tank, and place the ultrasonic transmitting-receiving system of the acoustic wave collection device in the rock sample wellbore. The ultrasonic transmitting-receiving system is connected to the inner and outer sliding rods and the computer, thus forming an indoor experimental device for cementing quality acoustic wave amplitude. By pulling the inner and outer sliding rods to change the distance between the transmitting vibration source and the receiving vibrator, the source distance of the transducer test can be changed at any point in the same wellbore, and the change of the position of the acoustic longitudinal wave waveform and the transverse wave waveform can be automatically collected by the computer.

[0045] On the basis of the above-mentioned embodiment, after obtaining the acoustic wave data, the collected acoustic wave data is preprocessed including filtering, gain removal, equalization and channel extraction, and the slowness time correlation method is used to calculate the longitudinal wave velocity, and the fast median filtering method is used to extract the reflected wave. The upgoing wave and the downgoing wave are separated by Laden transform, and the migration method used is considered. If the pre-stack migration is used, no superposition is performed here first. If the post-stack migration is used, superposition is performed after the dynamic correction. Select an appropriate migration method, migrate the wave field after the dynamic correction, and then obtain the casing wave amplitude and the formation wave amplitude based on this.

[0046] On the basis of the above embodiments, the bonding degree-acoustic wave amplitude function is constructed based on the casing wave amplitude, formation wave amplitude and bonding degree corresponding to each of the rock samples to be used, including: determining the relative value of the casing wave amplitude corresponding to the rock sample to be used based on the casing wave amplitude of the rock sample to be used and the casing wave amplitude of the free casing; determining the first interface bonding degree-casing wave amplitude function based on the relative value of the casing wave amplitude and the first interface bonding area of ​​the rock sample to be used; wherein the first interface bonding area is the bonding area between the casing and the cementing fluid in the rock sample to be used.

[0047] Among them, free casing can be understood as the rock sample to be used that is not filled with cementing fluid and adhesive foam, and the casing wave amplitude value refers to the ratio between the casing wave amplitude of the rock sample to be used and the casing wave amplitude of the free casing; the first interface bonding area is the bonding area between the cementing fluid and the casing in the rock sample to be used, which can be determined by the area ratio of the adhesive foam; the first interface bonding degree-casing wave amplitude function refers to the function used to determine the bonding degree between the cementing fluid and the casing in the rock sample to be used.

[0048] Specifically, a functional relationship may be constructed based on the relative value of the casing wave amplitude and the first interface cementation area of ​​the rock sample to be used, that is, the first interface cementation degree-formation wave amplitude function.

[0049] On the basis of the above-mentioned embodiment, the cementation degree-acoustic wave amplitude function is constructed based on the casing wave amplitude, formation wave amplitude and cementation degree corresponding to each of the rock samples to be used, including: determining the relative value of the formation wave amplitude corresponding to the rock sample to be used based on the formation wave amplitude of the rock sample to be used and the formation wave amplitude of the free casing; determining the second interface cementation degree-formation wave amplitude function based on the relative value of the formation wave amplitude and the second interface cementation area of ​​the rock sample to be used;

[0050] Among them, the free casing can be understood as the rock sample to be used that is not filled with cementing fluid and adhesive foam, the formation amplitude value refers to the ratio between the formation amplitude of the rock sample to be used and the formation amplitude of the free casing; the second interface bonding area is the bonding area between the cementing fluid and the well wall in the rock sample to be used, which can be determined by the area ratio of the adhesive foam; the second interface bonding degree-formation amplitude function refers to the function used to determine the bonding degree between the cementing fluid and the well wall in the rock sample to be used.

[0051] Specifically, a functional relationship can be constructed based on the relative value of the formation amplitude and the second interface cementation area of ​​the rock sample to be used, that is, the second interface cementation degree-formation amplitude function.

[0052] On the basis of the above embodiment, the target degree of cementation of the rock sample to be evaluated is determined based on the target casing wave amplitude, the target formation wave amplitude and the cementation degree-acoustic wave amplitude function, including: determining the target casing wave amplitude relative value of the rock sample to be evaluated based on the target casing wave amplitude of the rock sample to be evaluated, substituting the target casing wave amplitude relative value into the first interface cementation degree-casing wave amplitude function to determine the target degree of cementation of the rock sample to be evaluated.

[0053] In practical applications, when it is necessary to determine the target cementation degree of the rock sample to be evaluated, such as the cementation degree of the first interface of the rock sample to be evaluated, the relative value of the target casing wave amplitude of the rock sample to be evaluated can be determined, and substituted into the first interface cementation degree-acoustic wave amplitude function to obtain the cementation degree of the first interface.

[0054] On the basis of the above embodiment, the target degree of cementation of the rock sample to be evaluated is determined based on the target casing amplitude, the target formation amplitude and the cementation degree-acoustic wave amplitude function, including: determining the relative value of the target formation amplitude of the rock sample to be evaluated based on the target formation amplitude of the rock sample to be evaluated, substituting the relative value of the target formation amplitude into the second interface cementation degree-formation amplitude function to determine the target degree of cementation of the rock sample to be evaluated.

[0055] In practical applications, when it is necessary to determine the target cementation degree of the rock sample to be evaluated, such as the cementation degree of the second interface of the rock sample to be evaluated, the relative value of the target formation wave amplitude of the rock sample to be evaluated can be determined, and substituted into the second interface cementation degree-acoustic wave amplitude function to obtain the cementation degree of the second interface.

[0056] S130: Determine the cementing quality of the rock sample to be evaluated according to the target cementation degree.

[0057] It is understandable that the degree of cementation is an important criterion for measuring cementing quality. The better the degree of cementation, the better the corresponding cementing quality. Therefore, the cementing quality of the rock sample to be evaluated can be determined by the specific value of the degree of cementation.

[0058] The technical solution of the embodiment of the present invention determines the target casing wave amplitude and target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagated in the rock sample to be evaluated, and determines the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and the pre-constructed cementation degree-acoustic wave amplitude function; wherein the cementation degree-acoustic wave amplitude function is used to indicate the corresponding relationship between the cementation degree and the acoustic wave amplitude of the rock sample to be evaluated; and determines the cementing quality of the rock sample to be evaluated according to the target cementation degree. The technical problem that the cementing quality cannot be quantitatively evaluated in the prior art is solved, and the quantitative evaluation of the cementing quality through the acoustic wave amplitude is realized.

[0059] Embodiment 2

[0060] Figure 4 This is a flowchart of a cementing quality evaluation method based on acoustic wave amplitude according to the second embodiment of the present invention. This embodiment is a preferred embodiment of the above embodiment. The specific implementation method can refer to the technical solution of this embodiment. Among them, the technical terms that are the same or corresponding to the above embodiment are not repeated here. Figure 4As shown, the method includes:

[0061] Step 1: Preparation of rock samples simulating different degrees of cementation

[0062] Large-scale dense natural rock samples were collected from the field, cut into 90cm×30cm×30cm, and three small boreholes were drilled on the natural core using 1-inch, 3-inch, and 5-inch drill bits. Foam was pasted on the drilled well wall and the outer wall of the casing to simulate the bonding characteristics of the first and second interfaces. According to the size of the drilled wellbore, the casing was placed, and cementing fluid was filled between the casing and the core. After being placed at high temperature for a period of time, the cement ring was bonded to the casing and the core wall. Based on this, the preparation of rock samples with different bonding degrees was completed.

[0063] Step 2: Indoor cementing quality evaluation acoustic wave test

[0064] A single-transmitter-double-receiver indoor acoustic wave acquisition device was prepared. The device had a stepper motor control system and a motor data USB input control system, and was equipped with an intelligent test instrument. A 200cm×80cm×80cm experimental water tank was prepared, and the prepared rock sample was placed in the water tank. The ultrasonic transmitting-receiving system of the acoustic wave acquisition device was placed in the rock sample wellbore. The ultrasonic transmitting-receiving system was connected to the inner and outer sliding rods and the computer, thus forming an indoor experimental device for cementing quality acoustic wave amplitude. By pulling the inner and outer sliding rods to change the distance between the transmitting vibration source and the receiving vibrator, the source distance of the transducer test can be changed at any point in the same wellbore, and the changes in the positions of the acoustic longitudinal wave waveform and the transverse wave waveform can be automatically collected by the computer.

[0065] Step 3: Acoustic wave experiment test data processing

[0066] After preprocessing the collected acoustic wave data, including filtering, gain removal, equalization, and channel extraction, the slowness time correlation method is used to calculate the longitudinal wave velocity, and the fast median filter method is used to extract the reflection wave. The Laden transform is used to separate the upgoing and downgoing waves. Considering the migration method used, if the pre-stack migration is used, no stacking is done here first. If the post-stack migration is used, stacking is done after the dynamic correction. Select the appropriate migration method and migrate the wave field after the dynamic correction. Figure 5 It is the waveform diagram of the sound waves collected in the present invention.

[0067] Step 4: Establish cementing quality evaluation standards

[0068] Import the full waveform of the acoustic first wave amplitude and compare it with the recorded data under the free casing condition. Through the targeted design of 9 groups of rock samples under cross working conditions with the cementation ratio of the first interface of 50%, 75% and 100%, and the cementation ratio of the second interface of 50%, 75%, and 100%, a quantitative evaluation chart of the acoustic amplitude and cementing quality is statistically formed based on the above evaluation method. The evaluation index of the first and second interfaces is constructed by using the ratio of the amplitude value of the cement cementation curve of the target well section to the amplitude value of the cement cementation curve of the free casing (the well section with pure drilling fluid outside the casing).

[0069] The relative amplitude of the casing wave is

[0070]

[0071] Where: CBL c is the relative value of the casing wave amplitude, %; AMP c AMP is the casing wave amplitude, dB; fc is the acoustic wave amplitude of the free casing, dB.

[0072] The relative amplitude of the formation wave is

[0073]

[0074] Where: CBL f is the relative value of the formation wave amplitude, %; AMP f is the formation wave amplitude, dB.

[0075] Casing wave evaluation interface index I:

[0076] C1=0.0071×CBL c 1.083 (3)

[0077] Where: C1 is the index value of the first interface, dimensionless.

[0078] Formation wave evaluation interface index II:

[0079] C2=0.0059×CBL f 1.127 (4)

[0080] Where: C2 is the index value of the second interface, dimensionless.

[0081] Combining the acoustic amplitude cementing quality test results with field practice, the quantitative evaluation standards for cementing quality at interfaces Ⅰ and Ⅱ are given as shown in Table 1. Table 1 is a table of cementing quality evaluation standards

[0082] Table 1

[0083] The bonding area of ​​the interface Ⅰ and Ⅱ First interface evaluation index Second interface evaluation index ≥90％ <![CDATA[C1≥0.93]]> <![CDATA[C2≥0.94]]> 75％～90％ <![CDATA[0.76≤C1<0.93]]> <![CDATA[0.77≤C2<0.94]]> 60％～75％ <![CDATA[0.6≤C1<0.76]]> <![CDATA[0.6≤C2<0.77]]> 60％＞ <![CDATA[0.6>C1]]> <![CDATA[0.6>C2]]>

[0084] Step 5: Conduct indoor evaluation of cementing quality.

[0085] According to the calculation method and evaluation criteria in step 4, the first and second interfaces of cementing can be quantitatively evaluated.

[0086] The technical solution of the embodiment of the present invention determines the target casing wave amplitude and target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagated in the rock sample to be evaluated, and determines the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and the pre-constructed cementation degree-acoustic wave amplitude function; wherein the cementation degree-acoustic wave amplitude function is used to indicate the corresponding relationship between the cementation degree and the acoustic wave amplitude of the rock sample to be evaluated; and determines the cementing quality of the rock sample to be evaluated according to the target cementation degree. The technical problem that the cementing quality cannot be quantitatively evaluated in the prior art is solved, and the quantitative evaluation of the cementing quality through the acoustic wave amplitude is realized.

[0087] Embodiment 3

[0088] Embodiment 3 of the present invention provides a cementing quality evaluation method based on acoustic wave amplitude. This embodiment is another preferred embodiment of the above embodiment. Its specific implementation method can refer to the technical solution of this embodiment. Among them, the technical terms that are the same or corresponding to the above embodiment are not repeated here. The steps include:

[0089] Step 1: Preparation of rock samples simulating different cementation degrees: refer to Figure 2 , collect large-scale dense sandstone samples from the field, cut them into 90cm×30cm×30cm, and use 1-inch, 3-inch, and 5-inch drill bits to drill three small boreholes on the natural core. Paste foam on the drilled well wall and the outer wall of the casing to simulate the bonding characteristics of the first and second interfaces. According to the size of the drilled wellbore, place the casing, fill the cementing fluid between the casing and the core, and after being placed at high temperature for a period of time, the cement ring will be bonded with the casing and the core wall.

[0090] In the process of preparing rock samples with different cementation degrees, to simulate the first interface cementation degree, foam was pasted on the casing according to the area percentage of 0%, 25%, and 50%, and to simulate the second interface cementation degree, foam was pasted on the core wall according to the area percentage of 0%, 25%, and 50%. In this way, the preparation of rock samples with different cementation degrees was completed.

[0091] Step 2: Indoor cementing quality evaluation acoustic wave test: refer to Figure 3, prepare a single-transmitter-double-receiver indoor acoustic wave collection device, which has a stepper motor control system and a motor data USB input control system, and is equipped with intelligent testing instruments. Prepare a 200cm×80cm×80cm experimental water tank, place the prepared rock sample in the water tank, and place the ultrasonic transmitting-receiving system of the acoustic wave collection device in the rock sample wellbore. The ultrasonic transmitting-receiving system is connected to the inner and outer sliding rods and the computer, thus forming an indoor experimental device for cementing quality acoustic wave amplitude.

[0092] Reference Figure 3 By pulling the inner and outer sliding rods, the distance between the transmitting vibration source and the receiving vibrator can be changed, so that the source distance of the transducer test can be changed at any point in the same wellbore, and the changes in the positions of the acoustic longitudinal wave waveform and the transverse wave waveform can be automatically collected by the computer.

[0093] Step 3, acoustic wave experimental test data processing: After pre-processing the collected acoustic wave data including filtering, gain removal, equalization and channel extraction, the slow time correlation method is used to calculate the longitudinal wave velocity, and the fast median filter method is used to extract the reflected wave. The Laden transform is used to separate the upgoing and downgoing waves. Considering the migration method used, if the pre-stack migration is used, no stacking is done here first. If the post-stack migration is used, stacking is done after the dynamic correction. Select an appropriate migration method and migrate the wave field after the dynamic correction.

[0094] Step 4: Establish cementing quality evaluation standards: Import the full waveform of the first wave amplitude of the acoustic wave, compare and calibrate it with the recorded data under the free casing condition, and establish a quantitative evaluation system for cementing quality. Use the ratio of the amplitude value of the cement bonding curve of the target well section to the amplitude value of the cement bonding curve of the free casing (the well section with pure drilling fluid outside the casing) to construct the evaluation index of the first and second interfaces.

[0095] The relative amplitude of the casing wave is

[0096]

[0097] Where: CBL c is the relative value of the casing wave amplitude, %; AMP c AMP is the casing wave amplitude, dB; fc is the acoustic wave amplitude of the free casing, dB.

[0098] The relative amplitude of the formation wave is

[0099]

[0100] Where: CBL f is the relative value of formation wave amplitude, %; AMP f is the formation wave amplitude, dB.

[0101] Casing wave evaluation interface index I:

[0102] C1=0.0071×CBL c 1.083 (7)

[0103] Where: C1 is the index value of the first interface, dimensionless.

[0104] Formation wave evaluation interface index II:

[0105] C2=0.0059×CBL f 1.127 (8)

[0106] Where: C2 is the index value of the second interface, dimensionless.

[0107] Combining the acoustic amplitude cementing quality test results with field practice, the quantitative evaluation standards for cementing quality at interfaces Ⅰ and Ⅱ are given as shown in Table 1. Table 2 shows the cementing quality evaluation standards

[0108] Table 2

[0109]

[0110]

[0111] Step 5: Conduct indoor evaluation of cementing quality: Use the casing wave and formation wave obtained in step 3, and the acoustic wave amplitude calculation model described in equations (5) and (6) in step 4 to calculate the casing amplitude AMP w , the amplitude of the formation wave AMP c , and then calculate the interface index values ​​C2 and C2 of the first and second interfaces according to formulas (7) and (8). On this basis, according to the evaluation criteria shown in Table 1 in step five, the first and second interfaces can be quantitatively evaluated.

[0112] In order to test the applicability of the method and device, 35% of the area percentage of foam was pasted on the casing (the actual bonding area was 65%), and 20% of the area percentage of foam was pasted on the core wall (the actual bonding area was 80%), which were used to evaluate the bonding degree of the first and second interfaces respectively. According to the collected acoustic wave data, the amplitude of the casing wave was 63dB, the amplitude of the formation wave was 77dB, and the evaluation index value of the first interface was 0.631, the evaluation index value of the second interface was 0.789, the evaluation of the bonding area of ​​the first interface was 60% to 75%, and the evaluation of the bonding area of ​​the second interface was 75% to 90%, while the actual bonding area of ​​the first interface was 65%, and the actual bonding area of ​​the second interface was 80%, and the evaluation results were completely consistent with the actual results.

[0113] The present invention is the first to propose a cementing quality indoor evaluation method and device based on acoustic wave amplitude for cementing quality evaluation. It can effectively prepare rock samples with different cementation degrees, and then measure the acoustic wave amplitude when the cementation degrees of the first and second interfaces are known, and thereby construct a quantitative evaluation standard for different cementation areas and acoustic wave amplitude values, and then use the acoustic wave amplitude value to evaluate the cementing quality, thereby further improving the accuracy of the cementing quality acoustic wave amplitude evaluation. The rock samples and cementing quality acoustic wave experimental device in this method are closely prepared in combination with the actual site, and acoustic wave acquisition equipment and schemes are developed for the quantitative evaluation of the fixed first and second interfaces. Therefore, the indoor evaluation method and device for cementing quality based on acoustic wave amplitude described in the present invention have good prospects for promotion and application and value.

[0114] The technical solution of the embodiment of the present invention determines the target casing wave amplitude and target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagated in the rock sample to be evaluated, and determines the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and the pre-constructed cementation degree-acoustic wave amplitude function; wherein the cementation degree-acoustic wave amplitude function is used to indicate the corresponding relationship between the cementation degree and the acoustic wave amplitude of the rock sample to be evaluated; and determines the cementing quality of the rock sample to be evaluated according to the target cementation degree. The technical problem that the cementing quality cannot be quantitatively evaluated in the prior art is solved, and the quantitative evaluation of the cementing quality through the acoustic wave amplitude is realized.

[0115] Embodiment 4

[0116] Figure 6 Schematic diagram of the structure of a cementing quality evaluation device based on acoustic wave amplitude provided by the fourth embodiment of the present invention. Figure 6 As shown, the device comprises:

[0117] The acoustic wave amplitude determination module 310 is used to determine the target casing wave amplitude and the target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagated in the rock sample to be evaluated;

[0118] The cementation degree determination module 320 is used to determine the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and a pre-constructed cementation degree-acoustic wave amplitude function; wherein the cementation degree-acoustic wave amplitude function is used to indicate the corresponding relationship between the cementation degree and the acoustic wave amplitude of the rock sample to be evaluated;

[0119] The cementing quality determination module 330 is used to determine the cementing quality of the rock sample to be evaluated according to the target cementation degree.

[0120] The technical solution of the embodiment of the present invention determines the target casing wave amplitude and target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagated in the rock sample to be evaluated, and determines the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and the pre-constructed cementation degree-acoustic wave amplitude function; wherein the cementation degree-acoustic wave amplitude function is used to indicate the corresponding relationship between the cementation degree and the acoustic wave amplitude of the rock sample to be evaluated; and determines the cementing quality of the rock sample to be evaluated according to the target cementation degree. The technical problem that the cementing quality cannot be quantitatively evaluated in the prior art is solved, and the quantitative evaluation of the cementing quality through the acoustic wave amplitude is realized.

[0121] Optionally, the cementing quality evaluation device based on acoustic wave amplitude further includes: a function construction module, wherein the function construction module includes:

[0122] An acoustic wave data acquisition module is used to emit acoustic waves into the casings of various rock samples with different cementation degrees to be used, so as to determine the acoustic wave data corresponding to each of the rock samples to be used; wherein the cementation degree is the cementation degree between the casing and the cementing fluid or between the well wall and the cementing fluid in the rock sample to be used;

[0123] The cementation degree-acoustic wave amplitude function establishment module is used to determine the casing wave amplitude and formation wave amplitude corresponding to each of the rock samples to be used according to the acoustic wave data, and to construct the cementation degree-acoustic wave amplitude function based on the casing wave amplitude, formation wave amplitude and cementation degree corresponding to each of the rock samples to be used.

[0124] Optionally, the function building module further includes:

[0125] A drilling module, for drilling a wellbore of a preset size on the core of each of the rock samples to be used, and setting a casing and cementing fluid in the wellbore;

[0126] A pasting module, used for pasting foam on the contact surface between the cementing fluid and the casing, and pasting foam on the contact surface between the cementing fluid and the well wall during the process of setting the casing and the cementing fluid;

[0127] A determination module is used to determine the bonding degree of the rock sample to be used based on the bonding area of ​​the foam.

[0128] Optionally, the bonding degree-acoustic wave amplitude function establishment module includes:

[0129] A first relative value determination module, configured to determine a relative value of a casing wave amplitude corresponding to the rock sample to be used based on the casing wave amplitude of the rock sample to be used and the casing wave amplitude of the free casing;

[0130] A first function establishment module is used to determine the first interface cementation degree-casing wave amplitude function based on the casing wave amplitude relative value and the first interface cementation area of ​​the rock sample to be used;

[0131] Wherein, the first interface bonding area is the bonding area between the casing and the cementing fluid in the rock sample to be used.

[0132] Optionally, the bonding degree determination module 320 includes:

[0133] The first substitution module is used to determine the target casing wave amplitude relative value of the rock sample to be evaluated based on the target casing wave amplitude of the rock sample to be evaluated, substitute the target casing wave amplitude relative value into the first interface cementation degree-casing wave amplitude function, and determine the target cementation degree of the rock sample to be evaluated.

[0134] Optionally, the bonding degree-sound wave amplitude function establishment module includes:

[0135] A second relative value determination module is used to determine the formation amplitude relative value corresponding to the rock sample to be used based on the formation amplitude of the rock sample to be used and the formation amplitude of the free casing;

[0136] The second function establishment module is used to determine the second interface cementation degree-formation amplitude function based on the relative value of the formation amplitude and the second interface cementation area of ​​the rock sample to be used;

[0137] Wherein, the second interface bonding area is the bonding area between the cementing fluid and the well wall in the rock sample to be used.

[0138] Optionally, the bonding degree determination module 320 includes:

[0139] The second substitution module is used to determine the relative value of the target formation amplitude of the rock sample to be evaluated based on the target formation amplitude of the rock sample to be evaluated, substitute the relative value of the target formation amplitude into the second interface cementation degree-formation amplitude function, and determine the target cementation degree of the rock sample to be evaluated.

[0140] The cementing quality evaluation device based on acoustic wave amplitude provided in the embodiment of the present invention can execute the cementing quality evaluation method based on acoustic wave amplitude provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0141] Embodiment 5

[0142] Figure 7is a schematic diagram of the structure of an electronic device provided according to Embodiment 5 of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0143] like Figure 7 As shown, the electronic device 50 includes at least one processor 51, and a memory connected to the at least one processor 51 in communication, such as a read-only memory (ROM) 52, a random access memory (RAM) 53, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 51 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 52 or the computer program loaded from the storage unit 58 to the random access memory (RAM) 53. In the RAM 53, various programs and data required for the operation of the electronic device 50 can also be stored. The processor 51, the ROM 52, and the RAM 53 are connected to each other via a bus 54. An input / output (I / O) interface 55 is also connected to the bus 54.

[0144] A number of components in the electronic device 50 are connected to the I / O interface 55, including: an input unit 56, such as a keyboard, a mouse, etc.; an output unit 57, such as various types of displays, speakers, etc.; a storage unit 58, such as a disk, an optical disk, etc.; and a communication unit 59, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 59 allows the electronic device 50 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0145] The processor 51 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 51 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 51 executes the various methods and processes described above, such as the cementing quality evaluation method based on acoustic wave amplitude.

[0146] In some embodiments, the cementing quality evaluation method based on acoustic wave amplitude can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 58. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 50 via the ROM 52 and / or the communication unit 59. When the computer program is loaded into the RAM 53 and executed by the processor 51, one or more steps of the cementing quality evaluation method based on acoustic wave amplitude described above can be performed. Alternatively, in other embodiments, the processor 51 can be configured to execute the cementing quality evaluation method based on acoustic wave amplitude in any other appropriate manner (for example, by means of firmware).

[0147] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0148] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0149] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0150] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0151] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0152] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0153] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0154] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cementing quality evaluation method based on acoustic wave amplitude, characterized in that: include: Determining a target casing wave amplitude and a target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagating in the rock sample to be evaluated; Determine the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and a pre-constructed cementation degree-acoustic wave amplitude function; wherein the cementation degree-acoustic wave amplitude function is used to indicate the corresponding relationship between the cementation degree and the acoustic wave amplitude of the rock sample to be evaluated; The cementing quality of the rock sample to be evaluated is determined according to the target cementation degree.

2. The method according to claim 1, characterized in that Before determining the target cementation degree of the rock sample to be evaluated, the method further includes: Transmitting sound waves into the casings of various rock samples with different cementation degrees to be used, so as to determine the sound wave data corresponding to each of the rock samples to be used; wherein the cementation degree is the cementation degree between the casing and the cementing fluid or between the well wall and the cementing fluid in the rock samples to be used; The casing wave amplitude and formation wave amplitude corresponding to each of the rock samples to be used are determined according to the acoustic wave data, and the cementation degree-acoustic wave amplitude function is constructed based on the casing wave amplitude, formation wave amplitude and cementation degree corresponding to each of the rock samples to be used.

3. The method according to claim 2, characterized in that Before transmitting the acoustic waves into the casings of the rock samples with different cementation degrees to be used, the method further comprises: For each of the rock samples to be used, a wellbore of a preset size is drilled on the core of the rock sample to be used, and a casing and cementing fluid are arranged in the wellbore; During the process of setting the casing and the cementing fluid, the contact surface between the cementing fluid and the casing is adhered with foam, and the contact surface between the cementing fluid and the well wall is adhered with foam; The bonding degree of the rock sample to be used is determined based on the adhesion area of ​​the foam.

4. The method according to claim 2, characterized in that: The determining, according to the acoustic wave data, the casing wave amplitude and the formation wave amplitude corresponding to each of the rock samples to be used comprises: The sound wave data is processed in a preset manner to obtain a full waveform of the first wave amplitude corresponding to the sound wave data; The casing wave amplitude and the formation wave amplitude corresponding to the rock sample to be used are determined based on the first wave amplitude full waveform.

5. The method according to claim 4, characterized in that The method of constructing a cementation degree-acoustic wave amplitude function based on the casing wave amplitude, formation wave amplitude and cementation degree corresponding to each of the rock samples to be used includes: Determining a relative value of the casing wave amplitude corresponding to the rock sample to be used based on the casing wave amplitude of the rock sample to be used and the casing wave amplitude of the free casing; Determine the first interface cementation degree-casing wave amplitude function based on the casing wave amplitude relative value and the first interface cementation area of ​​the rock sample to be used; Wherein, the first interface bonding area is the bonding area between the casing and the cementing fluid in the rock sample to be used.

6. The method according to claim 5, characterized in that The step of determining the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and the cementation degree-sound wave amplitude function comprises: Based on the target casing wave amplitude of the rock sample to be evaluated, the relative value of the target casing wave amplitude of the rock sample to be evaluated is determined, and the relative value of the target casing wave amplitude is substituted into the first interface cementation degree-casing wave amplitude function to determine the target cementation degree of the rock sample to be evaluated.

7. The method according to claim 4, characterized in that The method of constructing a cementation degree-acoustic wave amplitude function based on the casing wave amplitude, formation wave amplitude and cementation degree corresponding to each of the rock samples to be used includes: Determining a relative value of the formation amplitude corresponding to the rock sample to be used based on the formation amplitude of the rock sample to be used and the formation amplitude of the free casing; Determining the function of the degree of cementation of the second interface-formation amplitude based on the relative value of the formation amplitude and the second interface cementation area of ​​the rock sample to be used; Wherein, the second interface bonding area is the bonding area between the cementing fluid and the well wall in the rock sample to be used.

8. The method according to claim 7, characterized in that The step of determining the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and the cementation degree-sound wave amplitude function comprises: Based on the target formation amplitude of the rock sample to be evaluated, a relative value of the target formation amplitude of the rock sample to be evaluated is determined, and the relative value of the target formation amplitude is substituted into the second interface cementation degree-formation amplitude function to determine the target cementation degree of the rock sample to be evaluated.

9. A cementing quality evaluation device based on acoustic wave amplitude, characterized in that: include: An acoustic wave amplitude determination module, used to determine a target casing wave amplitude and a target formation wave amplitude corresponding to the rock sample to be evaluated based on the acoustic wave signal propagated in the rock sample to be evaluated; A cementation degree determination module is used to determine the target cementation degree of the rock sample to be evaluated based on the target casing wave amplitude, the target formation wave amplitude and a pre-constructed cementation degree-acoustic wave amplitude function; wherein the cementation degree-acoustic wave amplitude function is used to indicate the corresponding relationship between the cementation degree and the acoustic wave amplitude of the rock sample to be evaluated; The cementing quality determination module is used to determine the cementing quality of the rock sample to be evaluated according to the target cementation degree.

10. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the cementing quality evaluation method based on acoustic wave amplitude as described in any one of claims 1-8.

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