CN110031553B - Casing damage monitoring system and method - Google Patents
Casing damage monitoring system and method Download PDFInfo
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- CN110031553B CN110031553B CN201910417700.3A CN201910417700A CN110031553B CN 110031553 B CN110031553 B CN 110031553B CN 201910417700 A CN201910417700 A CN 201910417700A CN 110031553 B CN110031553 B CN 110031553B
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Abstract
The application provides a casing damage monitoring system and method, which send out a plurality of sound wave signals through a sound wave monitoring assembly and receive sound wave reflection signals in a preset time period. Then, the sound wave reflected signal is processed through the sound wave control terminal, and the processed sound wave reflected signal is sent to the processing terminal. The processing terminal calculates corresponding longitudinal wave speed according to the time information of the sound wave reflection signals, obtains longitudinal wave speed change modes in a preset time period, obtains corresponding relations between different longitudinal wave speed change modes and different strain levels according to a pre-stored relation curve between the longitudinal wave speed and the strain magnitude, obtains the strain levels corresponding to the longitudinal wave speed change modes in the preset time period according to the corresponding relations, and obtains the damage level of the sleeve to be tested. Therefore, the casing does not need to be directly detected, the problem of influencing the mining benefit is avoided, the strain level is determined by utilizing the longitudinal wave speed change mode, and the result error caused by different rock characteristics is avoided.
Description
Technical Field
The invention relates to the technical field of monitoring, in particular to a casing damage monitoring system and method.
Background
The existence of high steep structure geology and high ground stress often causes stratum slippage, easily causes damage to oil and gas well pipelines in the stratum, and the damage of a sleeve pipe influences the normal production of the oil and gas well. In the oil and gas production process, the casing pipe needs to be detected regularly, when the casing pipe is detected, the oil and gas well needs to be stopped, and a logging instrument is put in for detection to judge whether the casing pipe is damaged. The traditional detection mode needs to consume the production time of the oil and gas well, has relatively high detection cost, and is not beneficial to improving the economic benefit of the oil and gas well.
Disclosure of Invention
It is therefore an object of the present invention to provide a casing damage monitoring system and method to improve the above-mentioned problems.
The embodiment of the application provides a casing damage monitoring system, which comprises a processing terminal, a sound wave control terminal and a sound wave monitoring assembly, wherein the sound wave control terminal is respectively connected with the processing terminal and the sound wave monitoring assembly;
the sound wave monitoring assembly is used for sending a plurality of sound wave signals to the rock layer and sending each sound wave reflection signal received in a preset time period to the sound wave control terminal;
the sound wave control terminal is used for processing the received sound wave reflection signals and sending the processed sound wave reflection signals to the processing terminal;
the processing terminal is used for calculating to obtain the longitudinal wave velocity corresponding to each sound wave reflection signal according to the time information of each sound wave reflection signal and obtaining the longitudinal wave velocity change mode in the preset time period according to the longitudinal wave velocity of each sound wave reflection signal in the preset time period;
the processing terminal is further used for obtaining corresponding relations between different longitudinal wave velocity change modes and different strain levels according to a pre-stored relation curve between the longitudinal wave velocity and the strain magnitude, obtaining the strain level corresponding to the longitudinal wave velocity change mode in the preset time period according to the corresponding relations, and obtaining the damage level of the casing pipe to be tested according to the strain level.
Another embodiment of the present application provides a casing damage monitoring method, is applied to casing damage monitoring system, casing damage monitoring system is including handling terminal, sound wave control terminal and sound wave monitoring components, sound wave control terminal respectively with handle terminal with sound wave monitoring components connects, sound wave monitoring components sets up at the sheathed tube outer wall that awaits measuring, the casing that awaits measuring is installed in the rock stratum, monitoring method includes:
the sound wave monitoring assembly sends a plurality of sound wave signals to the rock layer and sends each sound wave reflection signal received in a preset time period to the sound wave control terminal;
the sound wave control terminal processes the received sound wave reflection signals and sends the processed sound wave reflection signals to the processing terminal;
the processing terminal calculates and obtains the longitudinal wave velocity corresponding to each sound wave reflection signal according to the time information of each sound wave reflection signal, and obtains the longitudinal wave velocity change mode in the preset time period according to the longitudinal wave velocity of each sound wave reflection signal in the preset time period;
and the processing terminal obtains the corresponding relation between different longitudinal wave speed change modes and different strain levels according to a pre-stored relation curve between the longitudinal wave speed and the strain magnitude, obtains the strain level corresponding to the longitudinal wave speed change mode in the preset time period according to the corresponding relation, and obtains the damage level of the sleeve to be tested according to the strain level.
According to the casing damage monitoring system and method provided by the embodiment of the application, the sound wave monitoring assembly sends out a plurality of sound wave signals and receives sound wave reflection signals within a preset time period. Then, the sound wave reflected signal is processed through the sound wave control terminal, and the processed sound wave reflected signal is sent to the processing terminal. And the processing terminal calculates the corresponding longitudinal wave speed according to the time information of the sound wave reflection signal and obtains a longitudinal wave speed change mode in a preset time period. And the processing terminal obtains the corresponding relation between different longitudinal wave speed change modes and different strain levels according to a pre-stored relation curve between the longitudinal wave speed and the strain magnitude, and obtains the strain level corresponding to the longitudinal wave speed change mode in a preset time period according to the corresponding relation, so that the damage level of the sleeve to be tested is obtained. Therefore, the casing does not need to be directly detected, the problem of influencing the mining benefit is avoided, the strain level is determined by utilizing the longitudinal wave speed change mode, and the result error caused by different rock characteristics is avoided.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a cannula injury monitoring system according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a sleeve and an acoustic wave monitoring assembly according to an embodiment of the present application.
Fig. 3 is a structural diagram of an acoustic wave monitoring assembly according to an embodiment of the present application.
Fig. 4 is a graph illustrating the relationship between the velocity of longitudinal wave and the magnitude of strain according to an embodiment of the present disclosure.
Fig. 5 is a flowchart of a casing damage monitoring method according to an embodiment of the present application.
Fig. 6 is a flowchart of the substeps of step S110 in fig. 5.
Icon: 1-a cannula damage monitoring system; 10-casing pipe to be tested; 20-processing the terminal; 30-an acoustic wave control terminal; 40-an acoustic wave monitoring assembly; 401-a transmitting transducer; 402-a first receiving transducer; 403-a second receiving transducer; 404-a sound insulator; 50-cable.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
The mode that detects the casing damage and adopt among the prior art generally is directly detecting the casing, and this kind of detection mode then needs the oil gas well shut down to drop test equipment and detect in the casing, influence the exploitation benefit. The inventor researches and discovers that the change of the wave velocity of the sound wave passing through the rock during the compression deformation process of the rock can better reflect the strain condition of the rock, for example, the rock reaches the ultimate strength when the sound wave velocity reaches the peak value, and the rock is about to be damaged. The rock damages the oil and gas well casing in the rock in the deformation process, so the strain condition of the rock can reflect the damage condition of the oil and gas well casing. Therefore, the damage condition of the casing can be obtained by monitoring the strain condition of the rock.
Based on the discovery, this application provides a casing pipe loss monitoring scheme, sends the sound wave signal to the rock stratum through setting up the sound wave monitoring subassembly to confirm the longitudinal wave speed of sound wave signal in the rock stratum according to sound wave reflection signal, and obtain the longitudinal wave speed change mode in a period of time. And determining the strain level of the rock according to the longitudinal wave velocity change mode, thereby determining the damage level of the casing. So, through detecting the lithosphere, and then confirm the damage condition of sheathed tube, need not to stop producing the oil gas well, do not influence the exploitation benefit.
Referring to fig. 1, an embodiment of the present application provides a casing damage monitoring system 1 for monitoring damage of a casing 10 to be tested, where the casing damage monitoring system 1 includes a processing terminal 20, an acoustic wave control terminal 30, and an acoustic wave monitoring assembly 40. The sound wave control terminal 30 is connected to the processing terminal 20 and the sound wave monitoring component 40, wherein the sound wave control terminal 30 and the processing terminal 20 can be connected by a data line or wirelessly through a wireless communication module, and the embodiment is not limited thereto. The connection between the acoustic wave control terminal 30 and the acoustic wave monitoring assembly 40 may be via a cable 50.
In this embodiment, the processing terminal 20 may be a terminal device having data and image processing functions, such as a personal digital assistant, a tablet computer, a personal computer, a notebook computer, and the like. The acoustic wave control terminal 30 may be an acoustic wave sensor, and may be a resistance conversion type acoustic wave sensor, an electrostatic conversion type acoustic wave sensor, an electromagnetic conversion type acoustic wave sensor, or the like, and the specific type is not limited.
Referring to fig. 2, the acoustic wave monitoring assembly 40 is disposed on the outer wall of the casing 10 to be tested, and the casing 10 to be tested is installed in the rock layer. Wherein the acoustic wave monitoring assembly 40 may comprise a plurality of sets, each set of acoustic wave monitoring assembly 40 comprising a plurality. The multiple groups of sound wave monitoring assemblies 40 are respectively arranged on the outer walls of the casing pipe 10 to be tested in rock layers with different depths, and the multiple sound wave monitoring assemblies 40 in each group of sound wave monitoring assemblies 40 are respectively arranged on the outer walls of the casing pipe 10 to be tested in different directions. Thus, different parts of the casing 10 to be tested can be respectively subjected to damage detection.
During specific implementation, a casing can be placed into a well bore in which well switching is completed, the sound wave monitoring assemblies 40 are arranged on the outer wall of the casing at intervals of certain depth, and one sound wave monitoring assembly 40 can be arranged on the outer wall of the casing at intervals of 90 degrees at the same depth, so that 4 sound wave monitoring assemblies 40 at the same depth can cover monitoring of a rock stratum at 360 degrees around the well.
In this embodiment, the acoustic monitoring assembly 40 is configured to emit a plurality of acoustic signals into the rock formation in which the casing 10 is to be tested. Some of the plurality of acoustic signals emitted by the acoustic monitoring assembly 40 will be reflected back to the acoustic monitoring assembly 40 after passing through the rock strata. The acoustic wave monitoring assembly 40 transmits each acoustic wave reflection signal received within a preset time period to the acoustic wave control terminal 30.
The sound wave control terminal 30 may process the sound wave reflection signal after receiving the sound wave reflection signal. The acoustic wave control terminal 30 is mainly used to convert an acoustic wave reflection signal, which is a vibration signal, into an acoustic wave reflection signal, which is an electrical signal. And transmits the respective acoustic wave reflection signals after the conversion processing to the processing terminal 20.
After receiving each sound wave reflection signal, the processing terminal 20 calculates a longitudinal wave velocity corresponding to each sound wave reflection signal according to the time information of each sound wave reflection signal, and obtains a longitudinal wave velocity variation pattern in the preset time period according to the longitudinal wave velocity of each sound wave reflection signal in the preset time period. The processing terminal 20 is further configured to obtain corresponding relationships between different longitudinal wave velocity variation patterns and different strain levels according to a pre-stored relationship curve between the longitudinal wave velocity and the strain magnitude. And obtaining a strain grade corresponding to the longitudinal wave velocity change mode in the preset time period according to the corresponding relation, and obtaining the damage grade of the casing 10 to be tested according to the strain grade.
In this embodiment, the correspondence between the longitudinal wave velocity change pattern and the strain level is obtained by previously drawing a relationship curve between the longitudinal wave velocity and the strain magnitude. When damage detection is carried out, the longitudinal wave speed of the sound wave in the rock is detected through the sound wave monitoring assembly 40, so that the longitudinal wave speed change mode of the rock to be detected is determined, the strain grade of the rock to be detected is obtained, and the damage grade of the casing pipe 10 to be detected installed in the rock to be detected is further obtained. The scheme does not need to directly detect the casing, so that the benefit of oil and gas exploitation cannot be influenced. And the strain level is determined through the longitudinal wave change mode, so that the problem of detection result errors caused by different properties of rocks is solved.
In this embodiment, before the monitoring is formally performed, a test is required to obtain a relationship curve between the velocity of the longitudinal wave and the magnitude of the strain. Optionally, the casing damage monitoring system 1 further comprises an acoustic testing assembly and a strain gauge. Firstly, seismic data, well logging data and the like can be utilized to mark off a high-gradient/high-stress stratum, and underground sampling is carried out on the stratum to prepare a rock sample required by an experiment as a test rock. The stress of different magnitudes is generated on the tested rock by the strain device, and then the sound wave testing component sends out a testing sound wave signal when the tested rock is in different stress magnitudes, and sends the received testing sound wave reflection signal to the sound wave control terminal 30. The acoustic wave control terminal 30 processes the received test acoustic wave reflection signal and transmits the processed test acoustic wave reflection signal to the processing terminal 20.
The processing terminal 20 obtains the longitudinal wave velocity corresponding to the test acoustic wave reflection signal according to the time information of the test acoustic wave reflection signal. Different stress magnitudes of the tested rock correspond to different strain magnitudes, and the processing terminal 20 can obtain a relation curve between the longitudinal wave velocity and the strain magnitude according to the longitudinal wave velocity under different stress magnitudes and the strain magnitudes corresponding to different stress magnitudes.
Referring to fig. 3, in the present embodiment, the acoustic wave monitoring assembly 40 includes a transmitting transducer 401, a first receiving transducer 402 and a second receiving transducer 403, wherein the first receiving transducer 402 is disposed between the transmitting transducer 401 and the second receiving transducer 403, and the first receiving transducer 402 and the second receiving transducer 403 are disposed at intervals.
When the damage of the casing 10 to be tested is formally monitored, the transmitting transducer 401 is configured to send out a plurality of sound wave signals to a rock layer where the casing 10 to be tested is located, the first receiving transducer 402 and the second receiving transducer 403 are configured to receive sound wave reflection signals, and the first receiving transducer 402 and the second receiving transducer 403 respectively send the received sound wave reflection signals in a preset time period to the sound wave control terminal 30.
Optionally, the acoustic wave monitoring assembly 40 further comprises an acoustic insulator 404, the acoustic insulator 404 is disposed between the transmitting transducer 401 and the first receiving transducer 402 for isolating acoustic wave interference between the transmitting transducer 401, the first receiving transducer 402 and the second receiving transducer 403.
As can be seen from the above, the processing terminal 20 can obtain the corresponding relationship between different longitudinal wave velocity variation patterns and different strain levels according to the pre-stored relationship curve between the longitudinal wave velocity and the strain magnitude. For example, when the relationship between the velocity of the longitudinal wave and the magnitude of strain obtained by the test is a thicker curve as shown in fig. 4, in section a of the curve in fig. 4, the velocity of the longitudinal wave exhibits a rapid rise phase, which corresponds to the rock compaction phase. As the stress loading continues, the rate of rise of the longitudinal wave velocity decreases, as in section b of the curve. The stress at which the rock is subjected is about half the ultimate strength at this stage, which corresponds to the creation and initiation of propagation of new cracks in the rock. When the velocity of the longitudinal wave reaches the peak point, as shown in section c of fig. 4, the stress of the rock at this stage is about 80% of the ultimate strength, and the fracture in the rock at this stage is unstably propagated and penetrated. When there is an inflection point of the drop in the velocity of the longitudinal wave, i.e. segment d in fig. 4, at which the rock reaches ultimate strength, i.e. failure is imminent.
Based on the above analysis, the processing terminal 20 may obtain a corresponding relationship between different longitudinal wave velocity variation patterns and different strain levels according to the obtained relationship curve between the longitudinal wave velocity and the strain magnitude, for example, when the longitudinal wave velocity is in an ascending state and the ascending amplitude is greater than a preset threshold, it may be determined that the strain level is at a first level; when the longitudinal wave speed is in an ascending state and the ascending amplitude is smaller than a preset threshold value, determining that the strain is equal to a second level; determining the strain level as a third level when the longitudinal wave velocity is in a substantially constant state; when the velocity of the longitudinal wave is in a descending state, the strain level can be determined to be at a fourth level. Wherein, from the first grade, the strain degree of the second grade, the third grade and the fourth grade is gradually increased.
When the acoustic detection is performed on the rock layer at the periphery of the casing 10 to be detected, after the processing terminal 20 receives each acoustic reflection signal in a preset time period, the longitudinal wave speed corresponding to each acoustic reflection signal can be calculated in the following manner:
in this embodiment, the processing terminal 20 is pre-stored with the separation distance between the first receiving transducer 402 and the second receiving transducer 403. For each acoustic reflection signal, the processing terminal 20 may obtain a first point in time when the first receiving transducer 402 receives the acoustic reflection signal and a second point in time when the second receiving transducer 403 receives the acoustic reflection signal. A first time difference value is obtained according to the sending time point of the acoustic wave signal corresponding to the acoustic wave reflection signal and the first time point of the acoustic wave reflection signal received by the first receiving transducer 402. A second time difference value is obtained according to the sending time point of the acoustic wave signal corresponding to the acoustic wave reflection signal and the second time point of the acoustic wave reflection signal received by the second receiving transducer 403.
The processing terminal 20 may calculate the longitudinal wave velocity of the reflected acoustic wave signal according to the obtained first time difference value, the second time difference value and the separation distance between the first receiving transducer 402 and the second receiving transducer 403. Specifically, the longitudinal wave velocity can be calculated according to the following formula:
wherein, VpRepresenting the velocity of longitudinal waves, L representing the separation distance between the first receiving transducer 402 and the second receiving transducer 403, t1Representing said first time difference value, t2Representing the second time difference value.
Wherein, a cement ring layer is further included between the casing 10 to be tested and the rock layer, and the separation distance L between the first receiving transducer 402 and the second receiving transducer 403 can be determined in advance according to the longitudinal wave velocity of the acoustic signal in the tested rock and the longitudinal wave velocity of the tested cement layer, which can be obtained by testing indoors in advance. After the longitudinal wave velocities of the two are obtained, the separation distance L can be specifically determined by the following formula:
wherein, VGround pRepresenting the longitudinal wave velocity, V, of an acoustic signal in the test rockRing pThe longitudinal wave velocity of the acoustic wave signal in the test cement layer is shown, and d represents the thickness of the test cement layer.
The longitudinal wave velocity corresponding to each sound wave reflection signal received in the preset time period is obtained through calculation in the above mode, and thus, the longitudinal wave velocity change mode in the preset time period can be obtained.
As can be seen from the above, the processing terminal 20 may obtain the corresponding relationship between different longitudinal wave velocity variation patterns and different strain levels, and after obtaining the longitudinal wave velocity variation pattern within the preset time period, may obtain the strain level corresponding to the longitudinal wave velocity variation pattern within the preset time period according to the obtained corresponding relationship.
Through the above manner, the strain level of the rock stratum outside the casing pipe 10 to be tested can be obtained, and the strain of the rock stratum outside the casing pipe 10 to be tested directly affects the damage degree of the casing pipe 10 to be tested. In this embodiment, the processing terminal 20 is pre-stored with the corresponding relationship between different strain levels of the rock and different damage levels of the casing.
After obtaining the strain level of the rock layer outside the casing 10 to be measured, the processing terminal 20 may obtain the damage level of the casing 10 to be measured, which corresponds to the measured strain level of the rock layer, according to the pre-stored correspondence between different strain levels of the rock and different damage levels of the casing. It should be understood that when the strain level of the rock strata indicates a greater strain level of the rock strata, the more damaged the casing 10 to be tested is, and vice versa, the less damaged the casing 10 to be tested is, accordingly.
In this embodiment, on one hand, the damage of the casing 10 to be detected is detected by detecting the strain condition of the rock layer at the periphery of the casing 10 to be detected so as to obtain the damage condition of the casing 10 to be detected, so that the defect that the mining benefit is affected by stopping production and dropping a detection instrument into the casing for detection can be avoided. On the other hand, the rock is tested in advance to obtain the relation curves of different longitudinal wave velocities and different strain magnitudes, and then the corresponding relation between the longitudinal wave velocity change pattern and the strain grade is obtained, so that during formal monitoring, the corresponding strain grade can be obtained according to the obtained longitudinal wave velocity change pattern in the preset time period, and then the damage grade of the casing 10 to be tested is obtained. Therefore, the strain level is judged by adopting the change mode, and the defect that different rocks bring errors to the result due to the difference of different characteristics on the specific strain size can be avoided.
Referring to fig. 5, another embodiment of the present application further provides a casing damage monitoring method, where the casing damage monitoring method is applied to the casing damage monitoring system 1, the casing damage monitoring system 1 includes a processing terminal 20, a sound wave control terminal 30 and a sound wave monitoring component 40, the sound wave control terminal 30 is connected to the processing terminal 20 and the sound wave monitoring component 40, the sound wave monitoring component 40 is disposed on an outer wall of the casing 10 to be detected, the casing 10 to be detected is installed in a rock formation, and the following detailed steps of the monitoring method are as follows:
in step S110, the acoustic monitoring assembly 40 sends out a plurality of acoustic signals to the rock layer, and sends each acoustic reflection signal received within a preset time period to the acoustic control terminal 30.
In step S120, the sound wave control terminal 30 processes each received sound wave reflection signal, and sends each processed sound wave reflection signal to the processing terminal 20.
In step S130, the processing terminal 20 calculates a longitudinal wave velocity corresponding to each acoustic wave reflection signal according to the time information of each acoustic wave reflection signal, and obtains a longitudinal wave velocity variation pattern in the preset time period according to the longitudinal wave velocity of each acoustic wave reflection signal in the preset time period.
In step S140, the processing terminal 20 obtains a corresponding relationship between different longitudinal wave velocity change patterns and different strain levels according to a pre-stored relationship curve between the longitudinal wave velocity and the strain magnitude, obtains a strain level corresponding to the longitudinal wave velocity change pattern in the preset time period according to the corresponding relationship, and obtains the damage level of the casing 10 to be tested according to the strain level.
Optionally, the acoustic wave monitoring assembly 40 includes a transmitting transducer 401, a first receiving transducer 402 and a second receiving transducer 403, the first receiving transducer 402 is disposed between the transmitting transducer 401 and the second receiving transducer 403, and the first receiving transducer 402 and the second receiving transducer 403 are disposed at intervals.
Referring to fig. 6, the step of sending a plurality of acoustic signals to the rock layer by the acoustic monitoring assembly 40 and sending each acoustic reflection signal received within a preset time period to the acoustic control terminal 30 may be specifically implemented by the following sub-steps:
in step S111, the transmitting transducer 401 sends out a plurality of acoustic signals to the rock layer.
In step S112, the first receiving transducer 402 and the second receiving transducer 403 receive the reflected sound wave signals, and send the reflected sound wave signals received within a preset time period to the sound wave control terminal 30.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the method described above may refer to the corresponding process in the foregoing system, and will not be described in too much detail herein.
In summary, the embodiment of the present application provides a casing damage monitoring system 1 and a method, which send out a plurality of acoustic signals through the acoustic monitoring component 40, and receive acoustic reflection signals within a preset time period. Then, the acoustic wave reflected signal is processed by the acoustic wave control terminal 30, and the processed acoustic wave reflected signal is transmitted to the processing terminal 20. The processing terminal 20 calculates the corresponding longitudinal wave velocity according to the time information of the acoustic wave reflection signal, and obtains a longitudinal wave velocity change pattern in a preset time period. The processing terminal 20 obtains the corresponding relationship between different longitudinal wave velocity change modes and different strain levels according to the pre-stored relationship curve between the longitudinal wave velocity and the strain magnitude, and obtains the strain level corresponding to the longitudinal wave velocity change mode in the preset time period according to the corresponding relationship, thereby obtaining the damage level of the casing 10 to be tested. Therefore, the casing does not need to be directly detected, the problem of influencing the mining benefit is avoided, the strain level is determined by utilizing the longitudinal wave speed change mode, and the result error caused by different rock characteristics is avoided.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The casing damage monitoring system is characterized by comprising a processing terminal, a sound wave control terminal and a sound wave monitoring assembly, wherein the sound wave control terminal is respectively connected with the processing terminal and the sound wave monitoring assembly, the sound wave monitoring assembly is arranged on the outer wall of a casing to be detected, and the casing to be detected is arranged in a rock stratum;
the sound wave monitoring assembly is used for sending a plurality of sound wave signals to the rock layer and sending each sound wave reflection signal received in a preset time period to the sound wave control terminal;
the sound wave control terminal is used for processing the received sound wave reflection signals and sending the processed sound wave reflection signals to the processing terminal;
the processing terminal is used for calculating to obtain the longitudinal wave velocity corresponding to each sound wave reflection signal according to the time information of each sound wave reflection signal and obtaining the longitudinal wave velocity change mode in the preset time period according to the longitudinal wave velocity of each sound wave reflection signal in the preset time period;
the processing terminal is further used for obtaining corresponding relations between different longitudinal wave velocity change modes and different strain levels according to a pre-stored relation curve between the longitudinal wave velocity and the strain magnitude, obtaining the strain level corresponding to the longitudinal wave velocity change mode in the preset time period according to the corresponding relations, and obtaining the damage level of the casing pipe to be tested according to the strain level.
2. The cannula damage monitoring system of claim 1, wherein the acoustic monitoring assembly comprises a transmitting transducer, a first receiving transducer, and a second receiving transducer, the first receiving transducer disposed between the transmitting transducer and the second receiving transducer, the first receiving transducer and the second receiving transducer disposed in spaced apart relation;
the transmitting transducer is used for transmitting a plurality of sound wave signals to the rock layer;
the first receiving transducer and the second receiving transducer are used for receiving sound wave reflection signals and sending the sound wave reflection signals received in a preset time period to the sound wave control terminal.
3. The casing damage monitoring system of claim 2, wherein the processing terminal is configured to calculate a longitudinal wave velocity corresponding to each of the acoustic reflection signals by:
for each sound wave reflection signal, obtaining a first time point when the first receiving transducer receives the sound wave reflection signal and a second time point when the second receiving transducer receives the sound wave reflection signal;
obtaining a first time difference value according to the sending time point of the sound wave signal corresponding to the sound wave reflection signal and the first time point, and obtaining a second time difference value according to the sending time point and the second time point;
and calculating the longitudinal wave velocity of the sound wave reflection signal according to the first time difference value, the second time difference value and the spacing distance between the first receiving transducer and the second receiving transducer.
4. The cannula damage monitoring system of claim 3, wherein the longitudinal velocity of the reflected acoustic signal is calculated from the first time difference value, the second time difference value, and the separation distance according to the following formula:
wherein, VpRepresenting the velocity of longitudinal waves, L representing the separation distance between the first receiving transducer and the second receiving transducer, t1Representing said first time difference value, t2Representing the second time difference value.
5. The casing damage monitoring system of claim 2, wherein the acoustic monitoring assembly further comprises an acoustic insulator disposed between the transmitting transducer and the first receiving transducer for isolating acoustic interference between the transmitting transducer, the first receiving transducer, and the second receiving transducer.
6. The casing damage monitoring system according to any one of claims 1 to 5, wherein the acoustic wave monitoring assemblies comprise a plurality of sets, each set of acoustic wave monitoring assembly comprises a plurality of sets, the plurality of sets of acoustic wave monitoring assemblies are respectively arranged on the outer walls of the casing to be tested in rock layers with different depths, and the plurality of acoustic wave monitoring assemblies in each set of acoustic wave monitoring assemblies are respectively arranged on the outer walls of the casing to be tested in different directions.
7. The cannula damage monitoring system of any of claims 1-5, further comprising a sonic testing assembly and a strain device;
the strain device is used for generating stresses with different sizes on the tested rock;
the sound wave testing component is used for sending out a testing sound wave signal when the testing rock is under different stress magnitudes, and sending a received testing sound wave reflection signal to the sound wave control terminal;
the sound wave control terminal is used for processing the received test sound wave reflection signal and sending the processed sound wave reflection signal to the processing terminal;
and the processing terminal is used for obtaining the longitudinal wave speed corresponding to the test sound wave reflection signal according to the time information of the test sound wave reflection signal and obtaining a relation curve between the longitudinal wave speed and the strain magnitude according to the longitudinal wave speed under different stress magnitudes and the strain magnitude corresponding to different stress magnitudes.
8. The casing damage monitoring system of claim 7, wherein the processing terminal has pre-stored therein a correspondence between different strain levels of the rock and different damage levels of the casing;
the processing terminal is used for obtaining the damage grade of the casing pipe to be detected corresponding to the monitored strain grade in the preset time period according to the corresponding relation between the different pre-stored strain grades and the different damage grades.
9. The utility model provides a sleeve pipe damage monitoring method which characterized in that is applied to sleeve pipe damage monitoring system, sleeve pipe damage monitoring system includes processing terminal, sound wave control terminal and sound wave monitoring subassembly, sound wave control terminal respectively with processing terminal with the sound wave monitoring subassembly is connected, the sound wave monitoring subassembly sets up at the sheathed tube outer wall that awaits measuring, the sleeve pipe that awaits measuring is installed in the rock stratum, monitoring method includes:
the sound wave monitoring assembly sends a plurality of sound wave signals to the rock layer and sends each sound wave reflection signal received in a preset time period to the sound wave control terminal;
the sound wave control terminal processes the received sound wave reflection signals and sends the processed sound wave reflection signals to the processing terminal;
the processing terminal calculates and obtains the longitudinal wave velocity corresponding to each sound wave reflection signal according to the time information of each sound wave reflection signal, and obtains the longitudinal wave velocity change mode in the preset time period according to the longitudinal wave velocity of each sound wave reflection signal in the preset time period;
and the processing terminal obtains the corresponding relation between different longitudinal wave speed change modes and different strain levels according to a pre-stored relation curve between the longitudinal wave speed and the strain magnitude, obtains the strain level corresponding to the longitudinal wave speed change mode in the preset time period according to the corresponding relation, and obtains the damage level of the sleeve to be tested according to the strain level.
10. The cannula damage monitoring method of claim 9, wherein the acoustic monitoring assembly comprises a transmitting transducer, a first receiving transducer and a second receiving transducer, the first receiving transducer being disposed between the transmitting transducer and the second receiving transducer, the first receiving transducer and the second receiving transducer being spaced apart;
the sound wave monitoring assembly sends a plurality of sound wave signals to the rock layer and sends each sound wave reflection signal received in a preset time period to the sound wave control terminal, and the sound wave monitoring assembly comprises the following steps:
the transmitting transducer emits a plurality of acoustic signals to the rock layer;
the first receiving transducer and the second receiving transducer receive sound wave reflection signals and send the sound wave reflection signals received in a preset time period to the sound wave control terminal.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103140773A (en) * | 2010-09-29 | 2013-06-05 | 雪佛龙美国公司 | Device and method for imaging of non-linear and linear properties of formations surrounding a borehole |
| CN104295290A (en) * | 2009-05-27 | 2015-01-21 | 光学感应器控股有限公司 | Fracture monitoring |
| CN106199712A (en) * | 2016-06-29 | 2016-12-07 | 中国石油天然气集团公司 | A kind of method and device determining pressure break casing deformation region |
| CN109563736A (en) * | 2016-06-01 | 2019-04-02 | 斯伦贝谢技术有限公司 | The estimation of horizontal stress and nonlinear constant in the anisotropic formation of interlayer carbonate horizon in such as organic shale reservoir |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104295290A (en) * | 2009-05-27 | 2015-01-21 | 光学感应器控股有限公司 | Fracture monitoring |
| CN103140773A (en) * | 2010-09-29 | 2013-06-05 | 雪佛龙美国公司 | Device and method for imaging of non-linear and linear properties of formations surrounding a borehole |
| CN109563736A (en) * | 2016-06-01 | 2019-04-02 | 斯伦贝谢技术有限公司 | The estimation of horizontal stress and nonlinear constant in the anisotropic formation of interlayer carbonate horizon in such as organic shale reservoir |
| CN106199712A (en) * | 2016-06-29 | 2016-12-07 | 中国石油天然气集团公司 | A kind of method and device determining pressure break casing deformation region |
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