Open hole well sound wave positioning measurement method and related equipment

Abstract

The invention discloses an open hole well sound wave positioning measurement method and related equipment. The method comprises the following steps: acquiring an initial distance range between a to-be-measured open hole well and a drilling well; determining a target frequency range of the sound wave signal based on the initial distance range, and injecting the sound wave signal into the stratum; collecting a reflection signal of the to-be-detected open hole well based on sound wave signal reflection; sequentially carrying out sound wave signal processing and sound wave imaging processing on the reflection signal to obtain an imaging result; and determining relative position information between the to-be-measured open hole well and the drilling well based on an imaging result. According to the method, accurate positioning of the to-be-detected open hole well is realized, accurate tracking and identification of the old well open hole section are improved, convenience is provided for construction of an underground gas storage, ultrasonic waves are used as a positioning basis, and the method has a wider application scene.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of downhole detection, and in particular to a bare hole acoustic positioning measurement method and related equipment. BACKGROUND

[0002] Gas storage can realize strategic reserve and seasonal peak shaving of natural gas resources, and is an important carrier to guarantee safe and efficient operation of national economy. At present, the construction of new gas storage in oilfield operation area is planned, and the specific positions of many bare old wells cannot be determined due to long-time non-management. When constructing underground gas storage, these bare old wells need to be accurately positioned and treated to eliminate safety hazards.

[0003] In view of such problems, a relatively mature magnetic guide technology has been formed in China. The magnetic guide tool is lowered into the drilling well, the alternating magnetic field signal of the target well is detected, and then the relative position of the two wells is determined by combining with the attitude measurement algorithm. However, the target well needs to have a casing or a magnetic sub as a magnetic beacon, which has certain limitations and is not suitable for bare hole positioning. SUMMARY

[0004] In order to solve the above problems, the embodiments of the present application provide a bare hole acoustic positioning measurement method, system and system, electronic equipment, computer readable storage medium and computer program product.

[0005] In a first aspect, in order to solve the above technical problems, the present application provides a bare hole acoustic positioning measurement method, comprising:

[0006] obtaining an initial distance range between a to-be-measured bare hole and a drilling well;

[0007] determining a target frequency range of an acoustic signal based on the initial distance range, and injecting the acoustic signal into the stratum;

[0008] collecting a reflection signal reflected by the to-be-measured bare hole based on the acoustic signal;

[0009] sequentially performing acoustic signal processing and acoustic imaging processing on the reflection signal to obtain an imaging result;

[0010] determining relative position information between the to-be-measured bare hole and the drilling well based on the imaging result.

[0011] Beneficial effects are:

[0012] In the technical scheme provided in the embodiments of the present application, the target frequency range of the acoustic wave signal is determined according to the initial distance range between the to-be-measured open hole and the drilling well, and the acoustic wave signal is injected into the stratum; the reflection signal reflected by the to-be-measured open hole based on the acoustic wave signal is collected; the collected reflection signal is sequentially subjected to acoustic wave signal processing and acoustic wave imaging processing to obtain imaging results; and the relative position information between the to-be-measured open hole and the drilling well is determined based on the imaging results. In this way, accurate positioning of the to-be-measured open hole is realized, the accurate tracking and identification of the open hole section of the old well are improved, the construction of the underground gas storage is facilitated, and the ultrasonic wave is used as the positioning basis, so that the magnetic beacon in the well is not needed, and the technical scheme has a wider application scenario.

[0013] In a second aspect, the present application provides an open hole acoustic positioning measurement system, comprising a controller, an acoustic wave emitting device, an acoustic wave collecting device and a data processing device, wherein the controller is connected with the acoustic wave emitting device, the acoustic wave collecting device and the data processing device, and is used for applying the open hole acoustic positioning measurement method as described above.

[0014] The acoustic wave emitting device and the acoustic wave collecting device are both arranged in the pressure-resistant cylinder of the drilling well, the controller controls the acoustic wave emitting device to emit the acoustic wave signal after determining the target frequency range of the acoustic wave signal based on the initial distance range between the to-be-measured open hole and the drilling well, and then the controller further controls the acoustic wave collecting device to receive the reflection signal reflected by the to-be-measured open hole based on the acoustic wave signal; the controller controls the data processing device to receive the reflection signal transmitted by the sensor combination, and sequentially obtains the imaging results through acoustic wave signal processing and acoustic wave imaging processing, and then determines the relative position information between the to-be-measured open hole and the drilling well.

[0015] In a third aspect, the present application further provides an electronic device, comprising one or more processors, and a storage device configured to store one or more programs, when the one or more programs are executed by the one or more processors, the electronic device is caused to implement the open hole acoustic positioning measurement method as described above.

[0016] In a fourth aspect, the present application further provides a computer readable storage medium, which stores computer readable instructions, when the computer readable instructions are executed by the processor of the computer, the computer is caused to execute the open hole acoustic positioning measurement method as described above.

[0017] In a fifth aspect, the present application also provides a computer program product or computer program, which comprises computer instructions stored in a computer readable storage medium. A processor of a computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the computer device executes the barehole acoustic positioning measurement method provided in the various optional embodiments described above.

[0018] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and are not restrictive of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application. It is readily apparent to one of ordinary skill in the art that the accompanying drawings only illustrate some embodiments of the present application, and other drawings can be obtained by one of ordinary skill in the art without any creative effort, based on the accompanying drawings. In the drawings:

[0020] Figure 1 is a flow chart of a barehole acoustic positioning measurement method according to an exemplary embodiment of the present application;

[0021] Figure 2 is a schematic diagram of an instrument coordinate system and a geodetic coordinate system according to an exemplary embodiment of the present application;

[0022] Figure 3 is a schematic diagram of an obtained imaging result according to an exemplary embodiment of the present application;

[0023] Figure 4 is a flow chart of a barehole acoustic positioning measurement method according to an exemplary embodiment of the present application;

[0024] Figure 5 is a schematic diagram of a barehole acoustic positioning measurement system according to an exemplary embodiment of the present application;

[0025] Figure 6 is a schematic diagram of a part of structure of a barehole acoustic positioning measurement system located in a drilling well according to an exemplary embodiment of the present application;

[0026] Figure 7 is a block diagram of a barehole acoustic positioning measurement device according to an exemplary embodiment of the present application;

[0027] Figure 8 is a structural schematic diagram of a computer system of an electronic device suitable for implementing embodiments of the present application. DETAILED DESCRIPTION

[0028] Detailed description will be given to the exemplary embodiments with examples shown in the drawings. In the following description, same numerals in different drawings represent same or similar elements unless otherwise specified. The implementations described in the following exemplary embodiments do not represent all the implementations consistent with the present application. Instead, they are only examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0029] The block diagrams shown in the drawings are only functional entities, which do not necessarily correspond to physically independent entities. That is, the functional entities can be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0030] The flowcharts shown in the drawings are only exemplary illustrations, which do not necessarily include all the contents and operations / steps, and are not necessarily executed in the described order. For example, some operations / steps can be further divided, and some operations / steps can be combined or partially combined, so that the actual execution order can be changed according to the actual situation.

[0031] In the present application, "multiple" refers to two or more. The association relationship of "and / or" describes the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0032] In order to solve the problem that the existing magnetic guiding technology has certain limitations and is not suitable for open hole positioning, an embodiment of the present application proposes an open hole acoustic positioning and measuring method and system, an electronic device, and a computer readable storage medium, which are mainly related to the open hole acoustic positioning and measuring technology included in downhole detection technology. The embodiments will be described in detail below.

[0033] First, refer to Figure 1 , Figure 1 is a flowchart of an open hole acoustic positioning and measuring method according to an exemplary embodiment of the present application. As Figure 1 shown, in one exemplary embodiment, the open hole acoustic positioning and measuring method can include steps S101 to S105, which are described in detail as follows:

[0034] Step S101, obtaining an initial distance range between the open hole to be measured and the well being drilled.

[0035] Step S102, determining a target frequency range of the acoustic signal based on the initial distance range, and injecting the acoustic signal into the formation.

[0036] In order to realize accurate positioning of the open hole, the embodiment first estimates a plurality of distance values between the open hole to be measured and the well being drilled, takes a set of the estimated distance values as an initial distance range, and uses the initial distance range to determine a target frequency range, and then injects acoustic signals in the target frequency range into the formation to realize positioning measurement of the open hole. In the embodiment, different target frequency range acoustic signals are applied according to different distances, so as to improve the efficiency of the emitted acoustic signals in different scenarios.

[0037] In step S103, the reflection signal based on the reflection of the acoustic signal is collected.

[0038] In step S104, the reflection signal is sequentially subjected to acoustic signal processing and acoustic imaging processing to obtain an imaging result.

[0039] After the acoustic signals in the target frequency range are emitted, the well wall of the open hole to be measured will reflect the acoustic signals to form a reflection signal. Therefore, the embodiment continuously collects the reflection signal based on the reflection of the acoustic signal after the acoustic signal is emitted, and stores the collected reflection signal and various types of information carried by the reflection signal. The reflection signal after the acoustic signal processing is subjected to acoustic imaging processing to obtain an imaging result, so as to ensure the imaging effect.

[0040] In step S105, the relative position information between the open hole to be measured and the well being drilled is determined based on the imaging result.

[0041] After the imaging result is obtained through the acoustic imaging processing, the relative position information between the open hole to be measured and the well being drilled is analyzed and determined in the imaging coordinate system by using the imaging result, so as to realize positioning of the open hole to be measured.

[0042] As can be seen from the above, in the method provided by the embodiment, the target frequency range of the acoustic signal is determined based on the initial distance range between the open hole to be measured and the well being drilled, and the acoustic signal is injected into the formation. The reflection signal based on the reflection of the acoustic signal is collected. The reflection signal is sequentially subjected to acoustic signal processing and acoustic imaging processing to obtain an imaging result. The relative position information between the open hole to be measured and the well being drilled is determined based on the imaging result. On the one hand, low-frequency acoustic waves or high-frequency ultrasonic waves are emitted in the formation, the reflection signal of the open hole is received by the sensor, and the relative position information of the open hole to be measured is obtained through signal processing and calculation analysis. In this way, the equipment is more sensitive and the signal processing has higher precision and higher efficiency, which provides convenience for the construction of the underground gas storage. On the other hand, the ultrasonic wave is used as the positioning basis, and the acoustic wave is used as a good information carrier. The magnetic beacon in the open hole to be measured is not needed, and the application scenarios are wider. The problem of the limitation of the magnetic guide positioning technology is solved, and the influence of the magnetized casing and the complexity of the well pattern is avoided. The anti-interference performance is strong.

[0043] In one example embodiment provided by the present application, a plurality of distance values between the to-be-tested open hole and the drilling well are estimated by historical data of the to-be-tested open hole, and a set of the estimated distance values is taken as an initial distance range, and the specific steps can include:

[0044] obtaining historical data of the to-be-tested open hole;

[0045] obtaining the initial distance range between the to-be-tested open hole and the drilling well based on the historical data and the working position of the drilling well.

[0046] The historical data of the to-be-tested open hole reflect various information of the to-be-tested open hole recorded in history, and the analysis and processing of the historical data can obtain the approximate position of the to-be-tested open hole, so as to obtain the initial distance range between the to-be-tested open hole and the drilling well in combination with the working position of the drilling well.

[0047] In one example embodiment provided by the present application, the initial distance range and the corresponding relationship of the target frequency range are divided by a preset distance threshold, and the specific steps of determining the target frequency range can include:

[0048] obtaining a size relationship between the initial distance range and the distance threshold;

[0049] if the size relationship represents that the initial distance range is greater than the distance threshold, the sound wave signal is determined as a low-frequency sound wave signal, and the corresponding target frequency range is 2-3 kHz;

[0050] if the size relationship represents that the initial distance range is less than the distance threshold, the sound wave signal is determined as a high-frequency sound wave signal, and the corresponding target frequency range is 100-250 kHz.

[0051] In this embodiment, the size relationship between the initial distance range and the distance threshold is obtained first, and then the target frequency range of the sound wave signal is determined according to the content represented by the size relationship. If the size relationship represents that the initial distance range is greater than the distance threshold, for example, greater than 4 meters, it indicates that the distance between the to-be-tested open hole and the drilling well is far, and the sound wave signal is determined as a low-frequency sound wave signal, and the corresponding target frequency range is 2-3 kHz. If the size relationship represents that the initial distance range is less than the distance threshold, it indicates that the distance between the to-be-tested open hole and the drilling well is close, and the sound wave signal is determined as a high-frequency sound wave signal, and the corresponding target frequency range is 100-250 kHz.

[0052] In addition, since the initial distance range contains multiple estimated distance values, if there are values ​​that are both greater than and less than the distance threshold among the multiple estimated distance values, the sound wave signal can be determined as a low-frequency sound wave signal or a high-frequency sound wave signal based on the proportion of elements greater than and less than the distance threshold in the set of the initial distance range. Alternatively, other methods can be used to qualitatively determine the relationship between the initial distance range and the distance threshold. No restrictions are imposed here.

[0053] Thus, through the above embodiments, this application integrates two methods—sound wave long-range detection and ultrasonic imaging—using low-frequency and high-frequency sound wave signals to locate open-hole wells at different distances. By using ultrasonic waves as the positioning basis, without requiring magnetic beacons inside the well, and with a wider range of application scenarios, this application further expands the scope of application of the method provided by this application.

[0054] In an exemplary embodiment provided in this application, the acoustic signal processing method for the reflected signal includes gain recovery, filtering and noise reduction, and coordinate transformation, and the acoustic imaging processing includes superimposed imaging. Therefore, the specific steps for sequentially performing acoustic signal processing and acoustic imaging processing on the reflected signal may include:

[0055] The acquired reflected signals are sequentially subjected to gain recovery, filtering and noise reduction, and coordinate transformation to obtain the true reflected wave data;

[0056] Imaging algorithms are used to overlay real reflected wave data to obtain imaging results.

[0057] In this embodiment, the original waveform data of the received reflected signal is inevitably affected by the instrument's automatic gain control. Therefore, before calculating the relative position information, it is necessary to remove the gain control effect and restore the true waveform shape. Thus, gain recovery of the reflected signal is performed first. Specifically, a gain coefficient curve GN is recorded while acquiring the reflected signal downhole. The formula for gain recovery is:

[0058]

[0059] In the formula, A Z A0 represents the waveform signal recorded by the instrument, GN represents the gain coefficient, and N represents the number of time sampling points.

[0060] After gain restoration of the acquired reflected signal, it is filtered and denoised. Specifically, before starting frequency domain filtering and denoising, the waveform of the received, gain-restored reflected signal is first subjected to spectral analysis to determine the filtering frequency band. The discrete form of the Fourier transform is as follows:

[0061]

[0062] In the formula, x(n) (n = 0, 1, ..., N-1) is a discrete-time signal, X(k) is the Fourier transform of the signal x(n) (k = 0, 1, ..., N-1), and N is the number of sampling points of the discrete signal.

[0063] If there are low-energy noise signals in the low-frequency and high-frequency bands, and the amplitude of the noise is similar to that of the reflected wave, bandpass filtering is needed to eliminate the interference. A Butterworth digital filter is used to filter out the low-frequency and high-frequency components relative to the effective wave. Its amplitude squared function expression is as follows:

[0064]

[0065] In the formula, N represents the order of the filter; Ω c It is the passband cutoff frequency, typically taken as 3dB.

[0066] After performing threshold processing such as gain restoration and filtering / denoising on the reflected signal, it is transformed from the instrument coordinate system of the instrument that acquires the reflected signal to a unified geodetic coordinate system, improving the efficiency of subsequent data analysis. For example... Figure 2 As shown, Figure 2 This is a schematic diagram of the instrument coordinate system and the geodetic coordinate system in an exemplary embodiment of this application. Figure 2 The x-direction of the sound source points to the x-axis of the instrument coordinate system, and is perpendicular to the strike of the open-hole well to be measured next to the well. The angle is such that the y-direction of the sound source points to the y-axis of the instrument coordinate system. Relative to the entire reflecting interface, wave reflection only occurs on the incident plane, which includes the wellbore and the open hole to be measured next to it. The orientation of the open hole to be measured forms an angle α with the X-axis of the geodetic coordinate system XY. The angle between the instrument coordinate x-axis and the X-axis is the instrument azimuth AZ recorded by the instrument. The angles between them have the following relationship:

[0067]

[0068] Therefore, in this embodiment, the Alford rotation method is used to rotate the waveform received by the instrument, transforming the waveform data from the instrument coordinate system xy to the geodetic coordinate system XY. The specific calculation method is as follows:

[0069]

[0070] The data for each component in the geodetic coordinate system can be calculated:

[0071] XX = xxcos 2 AZ+(xy+yx)sinAZ cosAZ+yysin 2 AZ

[0072] XY = xycos2 AZ+(yy-xx)sinAZ cosAZ-yxsin 2 AZ

[0073] YX=yxcos 2 AZ+(yy-xx)sinAZ cosAZ-xysin 2 AZ

[0074] YY = yycos 2 AZ-(xy+yx)sinAZ cosAZ+xxcos 2 AZ

[0075] In the formula, xx, xy, yy, and yx are the four-component data in the instrument coordinate system, XX, XY, YY, and YX are the four-component data in the transformed geodetic coordinate system, and AZ is the instrument azimuth curve recorded during the instrument's acquisition of reflected signals.

[0076] In addition, when At 90° and 0° respectively, the direction of the sound source is parallel to and perpendicular to the strike of the open-hole well being measured. When the sound source vector is decomposed into two components, one parallel and one perpendicular to the reflecting interface, the SH and SV waves are projected onto the receiver in the x and y directions, respectively, to obtain the xx, xy, yy, and yx component data. The four-component orthogonal data in the geodetic coordinate system are used to calculate the SH and SV reflected waves at any angle. The calculation formula is as follows:

[0077]

[0078] In this embodiment, the reflected signal after coordinate transformation is the actual reflected wave data. This application uses an imaging algorithm to superimpose the actual reflected wave data to obtain the imaging result. Figure 3 As shown, Figure 3 This is a schematic diagram of the imaging result obtained in an exemplary embodiment of this application. In this embodiment, the real reflected wave data is transformed from a time-series diagram into a planar imaging diagram as the imaging result. Each sampling point of the acquired reflected signal corresponds to an imaging point. The imaging data of each imaging point (x, y, z) is formed by superimposing the echo data of the reflected signal emitted by i array elements and received by j array elements. The principle of superposition is to calculate the propagation time of the sound wave by calculating the sum of the distance from the transmitting array element to the imaging point and the distance from the imaging point to the receiving array element, and then corresponding the echo signal in the full matrix acquisition to it, thereby completing the data superposition. Then, the image amplitude I(x, y, z) of each imaging point in the imaging region is equal to the superposition of the amplitude values ​​of the full matrix acquisition data at that imaging point, thus obtaining the imaging result.

[0079] in,

[0080]

[0081] In the formula, Si,j represents the amplitude of the reflected signal emitted by element i and received by element j.

[0082] It should also be noted that the imaging algorithm can be modified according to the requirements. It generally consists of four parts: Fourier transform, wave equation solution, wave field extrapolation, and inverse Fourier transform. No restrictions are imposed here.

[0083] In another exemplary embodiment provided in this application, the object to be superimposed on the image is selected between acquiring the imaging results, and the specific steps for obtaining the corresponding imaging results may include:

[0084] Acquire batches of real reflected wave data corresponding to each sampling point used to collect reflected signals;

[0085] Imaging algorithms are used to overlay real reflected wave data to obtain imaging results.

[0086] In this embodiment, during the measurement sequence for open-hole acoustic positioning measurement, the measurement sequence is divided into unit time periods. Within each unit time period, reference imaging data equal to the number of sampling points are selected from the batch of real reflected wave data corresponding to each sampling point used to collect reflected signals, thereby completing the superimposed imaging within that unit time period. The sensing unit on each acoustic sensor in the array of acoustic sensors in the acoustic acquisition device serves as a sampling point.

[0087] Thus, through the above embodiments, after obtaining the reflection signal of the naked-eye well to be tested, this application sequentially processes the reflection signal through gain recovery, filtering and noise reduction, and coordinate transformation to obtain real reflection wave data. Based on the real reflection wave data, superimposed imaging is performed to improve the accuracy of the imaging results, thereby improving the accuracy of positioning measurement.

[0088] In an exemplary embodiment provided in this application, the relative position information includes the azimuth information of the open hole to be measured and the distance information between the open hole to be measured and the drilling well. The specific steps to obtain the relative position information may include:

[0089] The distance information between the open-hole well under test and the drilling well is obtained based on the imaging results and the reflection velocity of the reflection signal;

[0090] Obtain the target angle between the imaging result and the imaging coordinate system;

[0091] The azimuth information of the open hole to be tested is obtained based on the target angle, distance information, and the working position of the drilling operation.

[0092] In this embodiment, the wave velocity, i.e., the reflection speed of the reflected signal, is first obtained, along with the propagation time from the emission of the acoustic wave signal to the receipt of the reflected signal. Then, based on the wave velocities and propagation times of the acoustic and reflected signals, the distance information s between the open-hole to be tested and the drilling well is obtained, where s = vt, and v is the reflection velocity and t is the propagation time. Next, the target angle between the imaging result and the imaging coordinate system is obtained. Based on the target angle, distance information, and the working position of the drilling well, the azimuth information of the open-hole to be tested is obtained. Using this, the relative position information between the open-hole to be tested and the drilling well is analyzed and determined within the imaging coordinate system, thus achieving the positioning of the open-hole to be tested.

[0093] In another embodiment, before analyzing the azimuth information of the open-hole to be tested, the target point of the open-hole in the imaging coordinate system can be analyzed first based on the imaging results. Then, based on the straight line between the target point and the drilling line located at the origin of the imaging coordinate system, the target angle between the straight line and the 0-degree axis of the imaging coordinate system can be obtained. The target point can be determined by considering the characteristic that the reflected wave of a sound wave consists of multiple peaks and troughs. It is known that only the maximum peak corresponds to the true location of the open-hole to be tested. Therefore, the reflected signal is filtered using a Hilbert transform to ensure it has only one peak, reflecting the actual location of the open-hole to be tested, which serves as the target point.

[0094] Please see Figure 4 , Figure 4 This is a schematic diagram illustrating the process of locating an open-hole well in an exemplary embodiment of this application. In this embodiment, after starting the open-hole well acoustic positioning measurement, the initial distance range between the open-hole well to be measured and the drilling well is first obtained. Based on the initial distance range, it is determined whether the relative distance between the two wells is greater than 4m. If so, a low-frequency acoustic signal is injected into the formation, with a target frequency range of 2-3kHz. If not, a high-frequency acoustic signal is injected into the formation, with a target frequency range of 100-250kHz. Then, the acoustic signal reflected from the open-hole well (which serves as the target wellbore) forms a reflected signal, which is received by the acoustic sensor and stored along with its corresponding carried information. Finally, the reflected signal undergoes acoustic signal processing and acoustic imaging processing sequentially within the processing system to obtain an imaging result. Based on the imaging result, the relative position information between the open-hole well to be measured and the drilling well is determined, completing this open-hole well acoustic positioning measurement. Subsequently, every 10-20m of drilling in the drilling well, the open-hole well acoustic positioning measurement is performed cyclically to achieve precise positioning of the open-hole well.

[0095] Please see Figure 5 , Figure 5 This is a schematic diagram illustrating an open-hole well acoustic positioning and measurement system, as shown in an exemplary embodiment of this application. Figure 5As shown, the open-hole acoustic positioning measurement system includes a controller 510, an acoustic transmitter 520, an acoustic acquisition device 530, and a data processing device 540. The controller 510, the acoustic transmitter 520, the acoustic acquisition device 530, and the data processing device 540, using the open-hole acoustic positioning measurement method provided in this application, realize the measurement of the relative position between the drilling well 550 and the open-hole 560 to be measured.

[0096] In the drilling rig 550, the acoustic wave emitting device 520 and the acoustic wave acquiring device 530 are lowered onto the drill collar 552 of the drill bit 551 of the drilling rig 550 via the derrick 570 and connected to the controller 510 on the ground via a cable.

[0097] like Figure 6 As shown, Figure 6 This is a schematic diagram of a portion of the structure of an open-hole acoustic positioning and measurement system located within a drilling well, in an exemplary embodiment. In this embodiment, both the acoustic emitting device 520 and the acoustic acquiring device 530 are disposed within the pressure-resistant cylinder 553 of the drilling well 550. The acoustic emitting device 520 includes an acoustic transducer 521 and a transmitting electronic circuit 522. The acoustic acquiring device 530 includes an acoustic window 531 and a sensor assembly 532, which consists of an array of acoustic sensors.

[0098] The acoustic transducer 521 can emit acoustic signals. The acoustic transducer is connected to the transmitting electronic circuit 522. The transmitting electronic circuit 522 can adjust the frequency of the emitted acoustic waves. When performing long-distance open-hole well identification and positioning, it emits long-range acoustic waves with a frequency between 2-3kHz, i.e., low-frequency acoustic signals. When at close range, the frequency is increased to emit high-frequency acoustic signals with a frequency of 100-250kHz. The transmitting electronic circuit 522 is connected to the ground controller 510 via a cable. Ground personnel can adjust the acoustic frequency of the acoustic transducer by controlling the transmitting electronic circuit 522, thereby applying it to the identification of open-hole wells in different ranges.

[0099] The sensor assembly 532 is used to detect the far-field acoustic waves or ultrasonic pulse signals reflected from the target well (the open hole well to be tested). It can also convert the received reflected acoustic waves into electrical signals as image data. The sensor assembly 532 consists of an array of acoustic wave sensors, a total of m*n, where m is the number of rows of receiving sensors arranged in the axial direction and n is the number of axial receiving transducers. Generally, m is 4-8 and n is 8-12. The predetermined detection frequency range is 1-500kHz, thereby receiving reflected acoustic wave signals from all directions.

[0100] Additionally, the data processing device 540 includes an acoustic signal processing module and an acoustic imaging module. These modules receive reflected signals transmitted from the sensor array, obtain real reflected wave data through acoustic signal processing, and then obtain imaging results through acoustic imaging processing. These results are then used to determine the relative position information between the open-hole well and the drilling well. The acoustic signal processing includes gain recovery, filtering and noise reduction, and coordinate transformation, while the acoustic imaging processing is a superposition imaging method. In this embodiment, the open-hole acoustic positioning and measurement system may also include a cloud storage device connected to the data processing device, which is not shown in the figure.

[0101] As can be seen from the above, the technical solution provided in this embodiment applies the open-hole acoustic positioning measurement method provided in this application through the open-hole acoustic positioning measurement system. After the system construction is completed, it is only necessary to lower the acoustic wave emitting device and acoustic wave acquisition device into the drilling well. There is no need for a magnetic beacon in the open-hole well to be measured, which has a wider range of application scenarios and is not affected by the complexity of magnetized casing and well network, and has strong anti-interference ability.

[0102] Figure 7 This is a block diagram illustrating an acoustic positioning and measuring device 700 for open-hole wells, as shown in an exemplary embodiment of this application. Figure 7 As shown, the device includes:

[0103] Acquisition unit 701 is used to acquire the initial distance range between the open hole to be tested and the drilling well;

[0104] The transmitting unit 702 is used to determine the target frequency range of the acoustic signal based on the initial distance range and to inject the acoustic signal into the formation.

[0105] Acquisition unit 703 is used to acquire the reflected signal of the open-hole well under test based on the reflection of the acoustic signal;

[0106] The processing unit 704 is used to sequentially perform acoustic signal processing and acoustic imaging processing on the reflected signal to obtain the imaging result.

[0107] The positioning unit 705 is used to determine the relative position information between the open hole to be tested and the drilling well based on the imaging results.

[0108] This device utilizes the open-hole acoustic positioning measurement method provided in this application. The transmitting unit 702 determines the target frequency range of the acoustic signal based on the initial distance range between the open-hole to be measured and the drilling well, and injects the acoustic signal into the formation. The acquisition unit 703 acquires the reflected signal from the open-hole based on the acoustic signal reflection. The processing unit 704 sequentially performs acoustic signal processing and acoustic imaging processing on the reflected signal to obtain the imaging result. The positioning unit 705 determines the relative position information between the open-hole to be measured and the drilling well based on the imaging result. This achieves precise positioning of the open-hole to be measured, improves the accurate tracking and identification of open-hole sections in old wells, facilitates the construction of underground gas storage facilities, and, by using ultrasound as the positioning basis, eliminates the need for magnetic beacons within the well, thus having a wider range of applications.

[0109] In another exemplary embodiment, the acquisition unit 701 is further configured to acquire historical data of the open hole to be tested; and based on the historical data and the working position of the drilling well, to obtain the initial distance range between the open hole to be tested and the drilling well.

[0110] In another exemplary embodiment, the transmitting unit 702 is further configured to obtain the magnitude relationship between the initial distance range and the distance threshold; if the magnitude relationship indicates that the initial distance range is greater than the distance threshold, then the acoustic signal is determined to be a low-frequency acoustic signal, and the corresponding target frequency range is 2-3kHz; if the magnitude relationship indicates that the initial distance range is less than the distance threshold, then the acoustic signal is determined to be a high-frequency acoustic signal, and the corresponding target frequency range is 100-250kHz.

[0111] In another exemplary embodiment, the processing unit 704 is further configured to sequentially perform gain recovery, filtering and noise reduction, and coordinate transformation on the reflected signal to obtain real reflected wave data; and to use an imaging algorithm to superimpose the real reflected wave data to obtain an imaging result.

[0112] In another exemplary embodiment, the relative position information includes the orientation information of the open hole to be tested, and the distance information between the open hole to be tested and the drilling well; the positioning unit 705 is further configured to obtain the distance information between the open hole to be tested and the drilling well based on the imaging results and the reflection velocity of the reflection signal; obtain the target angle between the imaging results and the imaging coordinate system; and obtain the orientation information of the open hole to be tested based on the target angle, the distance information and the working position of the drilling well.

[0113] It should be noted that the open-hole acoustic positioning measurement device and the open-hole acoustic positioning measurement method provided in the above embodiments belong to the same concept. The specific operation methods of each module and unit have been described in detail in the method embodiments and will not be repeated here. In practical applications, the open-hole acoustic positioning measurement device provided in the above embodiments can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. This is not a limitation here.

[0114] Embodiments of this application also provide an electronic device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by one or more processors, enable the electronic device to implement the open-hole well acoustic positioning measurement method provided in the above embodiments.

[0115] Figure 8 A schematic diagram of a computer system suitable for implementing the embodiments of this application is shown. It should be noted that... Figure 8 The computer system 1000 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0116] like Figure 8 As shown, the computer system 800 includes a Central Processing Unit (CPU) 801, which can perform various appropriate actions and processes, such as executing the methods described in the above embodiments, based on a program stored in Read-Only Memory (ROM) 802 or a program loaded from storage portion 808 into Random Access Memory (RAM) 803. The RAM 803 also stores various programs and data required for system operation. The CPU 801, ROM 802, and RAM 803 are interconnected via a bus 804. An Input / Output (I / O) interface 805 is also connected to the bus 804.

[0117] The following components are connected to I / O interface 805: an input section 806 including a keyboard, mouse, etc.; an output section 807 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 808 including a hard disk, etc.; and a communication section 809 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 809 performs communication processing via a network such as the Internet. A drive 810 is also connected to I / O interface 805 as needed. A removable medium 811, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., is installed on drive 810 as needed so that computer programs read from it can be installed into storage section 808 as needed.

[0118] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 809, and / or installed from removable medium 811. When the computer program is executed by central processing unit (CPU) 801, it performs various functions defined in the system of this application.

[0119] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0120] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0121] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0122] Another aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the aforementioned open-hole acoustic positioning measurement method. This computer-readable storage medium may be included in the electronic device described in the above embodiments, or it may exist independently and not incorporated into that electronic device.

[0123] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the open-hole acoustic positioning measurement method provided in the various embodiments described above.

[0124] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method of acoustic positioning measurement in an open hole well, characterized by, The method comprises: acquiring an initial distance range between a to-be-measured open hole and a drilling well; determining a target frequency range of an acoustic wave signal based on the initial distance range, and injecting the acoustic wave signal into a stratum; collecting a reflection signal reflected by the to-be-measured open hole based on the acoustic wave signal; sequentially performing acoustic wave signal processing and acoustic wave imaging processing on the reflection signal to obtain an imaging result; determining relative position information between the to-be-measured open hole and the drilling well based on the imaging result.

2. The method of claim 1, wherein, The determining of the target frequency range of the acoustic wave signal based on the initial distance range comprises: acquiring a size relationship between the initial distance range and a distance threshold value; if the size relationship indicates that the initial distance range is greater than the distance threshold value, determining that the acoustic wave signal is a low-frequency acoustic wave signal, and a corresponding target frequency range is 2-3 kHz; if the size relationship indicates that the initial distance range is less than the distance threshold value, determining that the acoustic wave signal is a high-frequency acoustic wave signal, and a corresponding target frequency range is 100-250 kHz.

3. The method of claim 1, wherein, The sequentially performing of the acoustic wave signal processing and the acoustic wave imaging processing on the reflection signal to obtain the imaging result comprises: sequentially performing gain recovery, filter denoising and coordinate conversion on the reflection signal to obtain real reflection wave data; performing stack imaging on the real reflection wave data by using an imaging algorithm to obtain the imaging result.

4. The method of claim 3, wherein, The performing of the stack imaging on the real reflection wave data by using the imaging algorithm to obtain the imaging result comprises: acquiring batch real reflection wave data corresponding to each sampling point used for collecting the reflection signal; performing stack imaging on the real reflection wave data by using the imaging algorithm to obtain the imaging result.

5. The method according to any one of claims 1 to 4, characterized in that, The relative position information comprises azimuth information of the to-be-measured open hole and distance information between the to-be-measured open hole and the drilling well. The determining of the relative position information between the to-be-measured open hole and the drilling well based on the imaging result comprises: obtaining distance information between the to-be-measured open hole and the drilling well based on the imaging result and reflection velocity of the reflection signal; acquiring a target angle between the imaging result and an imaging coordinate system; obtaining azimuth information of the to-be-measured open hole based on the target angle, the distance information and a working position of the drilling well.

6. The method of claim 1, wherein, The acquiring of the initial distance range between the to-be-measured open hole and the drilling well comprises: acquiring historical data of the to-be-measured open hole; obtaining the initial distance range between the to-be-measured open hole and the drilling well based on the historical data and a working position of the drilling well.

7. A borehole acoustic positioning survey system characterized by, The device comprises a controller, an acoustic wave emitting device, an acoustic wave collecting device and a data processing device, the controller is connected with the acoustic wave emitting device, the acoustic wave collecting device and the data processing device, and is used for applying the open hole acoustic wave positioning measurement method in any one of claims 1 to 6. The sound wave emitting device and the sound wave collecting device are arranged in a pressure cylinder of a drilling well, the controller controls the sound wave emitting device to emit a sound wave signal based on a target frequency range of the sound wave signal determined according to an initial distance range between a to-be-measured open hole and the drilling well, and then controls the sound wave collecting device to receive a reflected signal reflected by the to-be-measured open hole based on the sound wave signal; the controller controls the data processing device to receive the reflected signal transmitted by the sensor combination, and sequentially obtains an imaging result through sound wave signal processing and sound wave imaging processing, and then determines relative position information between the to-be-measured open hole and the drilling well based on the imaging result.

8. The system of claim 7, wherein, The sound wave emitting device comprises a sound wave transducer and an emitting electronic circuit. The emitting electronic circuit is configured to adjust the frequency of the emitted sound wave according to a size relationship between an initial distance range between a to-be-measured open hole and a drilling well and a distance threshold value; if the size relationship indicates that the initial distance range is greater than the distance threshold value, the sound wave signal is determined as a low-frequency sound wave signal, and the corresponding target frequency range is 2-3 kHz; if the size relationship indicates that the initial distance range is less than the distance threshold value, the sound wave signal is determined as a high-frequency sound wave signal, and the corresponding target frequency range is 100-250 kHz. The sound wave transducer is connected with the emitting electronic circuit, and is configured to emit a low-frequency sound wave signal or a high-frequency sound wave signal with a target frequency range determined by the emitting electronic circuit.

9. The system of claim 7, wherein, The sound wave collecting device comprises a sound-transmitting window and a sensor combination, the sensor combination is composed of array-distributed sound wave sensors, and the sensor combination is located on the inner side of the sound-transmitting window and is configured to receive a reflected signal reflected by a to-be-measured open hole based on the sound wave signal.

10. The system of claim 7, wherein, The data processing device comprises a sound wave signal processing module and a sound wave imaging module. The sound wave signal processing module is configured to sequentially perform gain recovery, filter denoising and coordinate conversion on the reflected signal to obtain real reflected wave data. The sound wave imaging module is connected with the sound wave signal processing module, and after receiving the real reflected wave data transmitted by the sound wave signal processing module, the sound wave imaging module performs superposition imaging on the real reflected wave data by using an imaging algorithm to obtain an imaging result, and then determines relative position information between the to-be-measured open hole and the drilling well.

Images