Array acoustic based well cementing sliding sleeve opening monitoring device and method

Abstract

The application provides a cementing sliding sleeve opening monitoring device based on array acoustic waves, which is arranged in a mounting groove of a side wall of a sliding sleeve body and comprises an acoustic wave transmitter arranged below a fracturing hole and used for transmitting acoustic wave signals, an array acoustic wave receiver arranged above the fracturing hole and used for receiving the acoustic wave signals, and a communication circuit module connected with the array acoustic wave receiver and used for judging whether the sliding sleeve is opened according to the acoustic wave signals. The application solves the problem that the prior art cannot accurately judge whether the sliding sleeve is opened in real time, has the advantages of simple device, reliable monitoring and correct judgment, thereby providing technical services for segmented fracturing operation, and has important significance for improving the work efficiency of field fracturing and completion operation and reducing construction cost.

Description

Technical Field

[0001] This invention relates to the field of cementing sleeve staged fracturing completion technology, and more specifically, to a cementing sleeve opening monitoring device and method based on array acoustic waves. Background Technology

[0002] Cementing sliding sleeve staged fracturing completion technology refers to the process where, after drilling, multiple stages of fracturing sliding sleeves are installed inside the casing based on the geological formation information of the oil and gas reservoir and run into the well in one trip. Once each stage of the sliding sleeve reaches its corresponding target layer, conventional cementing operations are performed. During fracturing operations, the first-stage sliding sleeve (cementing fracturing toe sleeve) is opened hydraulically first, and then subsequent sliding sleeves are opened sequentially using a specific method to connect the wellbore with the reservoir, completing multi-stage fracturing of multiple production layers, and ultimately achieving fracturing-based production enhancement technology for oil and gas reservoir stimulation.

[0003] Cementing-sliding-sleeve staged fracturing completion technology utilizes cementing for well completion, which has lower requirements for wellbore stability and regularity, and can meet the requirements of complex well conditions with high reservoir drilling difficulty. After cementing, the wellbore stability is good, the well control risk is low, and it can meet the requirements of subsequent construction. Targeted fracturing of the reservoir can be performed, and the stimulation is highly targeted. The use of an integrated cementing, completion, and fracturing string allows for continuous fracturing operations without the need for additional perforation. The casing serves as the fracturing string, with low internal friction and low surface construction pressure. The operation is reliable and improves construction efficiency, while reducing costs. Therefore, cementing-sliding-sleeve staged fracturing completion technology has significant advantages over other in-casing fracturing completion technologies, demonstrating significant economic benefits and technical advantages in field applications.

[0004] Before cementing operations, the cementing sleeve is lowered to the predetermined position at the bottom of the well along with the casing. Normal pump circulation and cementing operations are then performed. Before fracturing, a stepped pressure test is conducted on the casing inside the wellbore. Once the test pressure reaches the opening pressure value of the high-precision opening valve, the valve opens, and the fluid and fluid pressure inside the casing are transmitted through the pressure transmission hole to the sleeve, causing it to move downwards and expose the fracturing hole, establishing a communication channel between the inside and outside of the casing. Existing sleeve products mainly include ball-throwing pressure-activated opening type, dart-throwing pressure-activated opening type, and RFID tag opening type, but currently there is no effective device for real-time detection of whether the cementing sleeve is open.

[0005] To address the problems of existing technologies, this invention provides a cementing sleeve opening monitoring device and method based on array acoustic waves. Summary of the Invention

[0006] To address the problems in the prior art, this invention provides a cementing sleeve opening monitoring device based on array acoustic waves, characterized in that the device is disposed within an installation groove on the side wall of the sleeve body, and comprises:

[0007] An acoustic transmitter, positioned below the fracturing hole, is used to emit acoustic signals.

[0008] An array of acoustic receivers, positioned above the fracturing hole, is used to receive the acoustic signals;

[0009] A communication circuit module, which is connected to the array acoustic receiver, is used to determine whether the sliding sleeve is open based on the acoustic signal.

[0010] According to one embodiment of the present invention, the mounting slot includes:

[0011] The first mounting slot, which is a cuboid slot, is located on the inner side of the side wall of the sliding sleeve body and is used to mount the sound wave transmitter.

[0012] According to one embodiment of the present invention, the device comprises:

[0013] A protective cover for the acoustic transmitter is disposed outside the acoustic transmitter to seal the acoustic transmitter within the first mounting groove, thereby protecting the acoustic transmitter.

[0014] According to one embodiment of the present invention, the mounting slot includes:

[0015] The second mounting slot, which is a cuboid slot, is located on the inner side of the side wall of the sliding sleeve body and is used to mount the array acoustic receiver.

[0016] According to one embodiment of the present invention, the device comprises:

[0017] An array acoustic receiver protective cover is disposed outside the array acoustic receiver to seal the array acoustic receiver within the second mounting groove, thereby protecting the array acoustic receiver.

[0018] According to one embodiment of the present invention, the mounting slot includes:

[0019] The third mounting slot, which is a cuboid slot, is located on the inner side of the side wall of the sliding sleeve body and is used to mount the communication circuit module.

[0020] According to one embodiment of the present invention, the device comprises:

[0021] A circuit protection compartment is disposed outside the communication circuit module and is used to seal the communication circuit module within the third mounting slot to protect the communication circuit module.

[0022] According to one embodiment of the present invention, when the sliding sleeve is closed, the slider blocks the fracturing orifice, and no communication channel is established between the inside and outside of the casing, so fracturing operations cannot be performed. When the sliding sleeve is opened, the slider detaches from the sliding sleeve body under the action of external force, the fracturing orifice opens, and a communication channel is established between the inside and outside of the casing, allowing fracturing operations to be performed. The communication circuit module includes:

[0023] The acoustic wave calculation unit is used to calculate the velocity of the first acoustic wave to arrive at the array acoustic wave receiver based on the acoustic wave signal, and record it as the first wave velocity.

[0024] The speed determination unit is used to compare the speed of the sound wave in the slider, the speed of the sound wave in the cement ring, and the speed of the first wave to obtain a comparison result.

[0025] The result output unit is used to output a shut-off signal when the comparison result is that the acoustic velocity of the slider is equal to the initial wave velocity, indicating that the sliding sleeve is in a shut-off state, and to output an open signal when the comparison result is that the acoustic velocity of the cement ring is equal to the initial wave velocity, indicating that the sliding sleeve is in an open state.

[0026] According to another aspect of the present invention, a method for monitoring the opening of a cementing sleeve based on array acoustic waves is also provided, executed by the apparatus described in any of the preceding claims, the method comprising the following steps:

[0027] A sound wave signal is emitted by the sound wave transmitter located below the fracturing hole;

[0028] The acoustic signal is received by the array of acoustic receivers positioned above the fracturing hole;

[0029] The communication circuit module connected to the array acoustic receiver determines whether the sliding sleeve is open based on the acoustic signal.

[0030] According to another aspect of the invention, a storage medium is also provided, which includes a series of instructions for performing the steps of the method described in any of the preceding claims.

[0031] This invention provides a cementing sleeve opening monitoring device and method based on array acoustic waves. It employs an acoustic transmitter positioned below the fracturing hole to emit acoustic signals, and an array acoustic receiver positioned above the fracturing hole to receive these signals. A communication circuit module connected to the array acoustic receiver calculates the initial wave velocity reaching the receiver, determining whether the initial wave velocity is the cement sheath acoustic velocity or the slide block acoustic velocity, thereby obtaining information on whether the sleeve is open or closed. This invention solves the problem of existing technologies being unable to accurately determine whether the sleeve is open in real time, and is of great significance for subsequent fracturing operations.

[0032] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description, claims, and drawings. Attached Figure Description

[0033] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0034] Figure 1 A schematic diagram of a cementing sleeve opening monitoring device based on array acoustic waves monitoring sleeve closure is shown according to an embodiment of the present invention.

[0035] Figure 2 A schematic diagram of a cementing sleeve opening monitoring device based on array acoustic waves according to an embodiment of the present invention is shown.

[0036] Figure 3 A time slowness correlation diagram is shown when the sleeve closes according to an embodiment of the present invention;

[0037] Figure 4 A time slowness correlation diagram is shown when the sleeve opens according to an embodiment of the present invention;

[0038] Figure 5 A flowchart of a cementing sleeve opening monitoring method based on array acoustic waves according to an embodiment of the present invention is shown.

[0039] In the accompanying drawings, the same parts use the same reference numerals. Also, the drawings are not drawn to scale.

[0040] The meanings of the reference numerals in the attached figures are as follows:

[0041] 101: Sliding sleeve body

[0042] 102: Cement Ring

[0043] 103: Formation to be fractured

[0044] 104: Slider

[0045] 105: Sound wave transmitter

[0046] 106: Protective shield for acoustic wave transmitter

[0047] 107a: First acoustic receiver

[0048] 107b: Second acoustic receiver

[0049] 107c: Third acoustic receiver

[0050] 107d: Fourth Sound Receiver

[0051] 108: Protective Cover for Array Acoustic Receiver

[0052] 109: Electrical wires

[0053] 110: Communication circuit module

[0054] 111: Circuit Protection Compartment

[0055] 112: Fracturing hole Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0057] Existing technology (CN110924895A) discloses a downhole switch sliding sleeve. Existing technology (CN113356794A) discloses a full-bore, unlimited-level intelligent switch sliding sleeve. Existing technology (CN113153218A) discloses a full-bore, unlimited-level fracturing sliding sleeve. Existing technology (CN111101892A) discloses a method for the combined operation of wellbore pressure testing and toe-end sliding sleeve activation in shale gas horizontal wells. Existing technology (Research Status and Prospect of Segmented Fracturing Cementing Sleeves, Petroleum Machinery, 2021, 49(11)) introduces the current development status of segmented fracturing completion technology using cementing sliding sleeves, and analyzes the application of cementing fracturing toe-end sliding sleeves used in cementing casing fracturing completion and the application of cementing fracturing sliding sleeves in the construction site. However, none of the above existing technologies disclose how to detect whether the sliding sleeve is open, nor can the opening or closing status of the sliding sleeve be obtained in real time on the ground.

[0058] To address the problems in the prior art, this invention provides a cementing sleeve opening monitoring device based on array acoustic waves. The device determines the closed and open state of the sleeve by receiving waveforms from the array acoustic wave receiver, thereby providing technical services for staged fracturing operations.

[0059] This invention provides a cementing sleeve opening monitoring device based on arrayed acoustic waves, installed in a mounting groove on the side wall of the sleeve body 101. It includes an acoustic wave transmitter 105, an arrayed acoustic wave receiver 107, and a communication circuit module 110. Specifically, the acoustic wave transmitter 105 and the arrayed acoustic wave receiver 107 form an arrayed acoustic wave, positioned at opposite ends of a fracturing hole 112. Further, the acoustic wave transmitter 105 is positioned below the fracturing hole 112 to transmit acoustic wave signals. The arrayed acoustic wave receiver 107 is positioned above the fracturing hole 112 to receive acoustic wave signals. The communication circuit module 110 is connected to the arrayed acoustic wave receiver 107 and is used to determine whether the sleeve is open based on the acoustic wave signals.

[0060] Optionally, the inner diameter of the sliding sleeve body 101 is 112-118mm, the outer diameter is 186mm, the total length is about 1.5m, the opening pressure is 50-160MPa, and the temperature resistance is 180℃.

[0061] Optionally, the mounting groove includes a first mounting groove, which is a cuboid groove formed on the inner side of the side wall of the sliding sleeve body 101, for mounting the acoustic wave emitter 105. Optionally, the dimensions of the first mounting groove are: length 120mm × width 30mm × height 15mm. Optionally, the dimensions of the acoustic wave emitter 105 are: length 80mm × width 25mm × height 10mm. Optionally, the top edge of the acoustic wave emitter 105 is 100mm away from the horizontal plane where the central axis of the fracturing hole 112 is located. Optionally, the side edge of the acoustic wave emitter 105 is 10mm away from both the inner and outer walls of the sliding sleeve body 101.

[0062] like Figure 1 As shown, a cementing sleeve opening monitoring device based on array acoustic waves further includes: an acoustic transmitter protective cover 106. Specifically, the acoustic transmitter protective cover 106 is disposed outside the acoustic transmitter 105 to seal the acoustic transmitter 105 within the first mounting groove, thereby protecting the acoustic transmitter 105. Optionally, the acoustic transmitter protective cover 106 is made of stainless steel. Optionally, the contact surface between the acoustic transmitter protective cover 106 and the first mounting groove is sealed with an O-ring and fixed with screws, serving a sealing and pressure-bearing function to prevent mud and fracturing fluid from entering the first mounting groove and damaging the acoustic transmitter 105.

[0063] Optionally, the mounting groove includes a second mounting groove, which is a cuboid groove formed on the inner side of the side wall of the sliding sleeve body 101, for mounting the array acoustic receiver 107. Optionally, the dimensions of the second mounting groove are: 800mm long × 30mm wide × 15mm high. Optionally, the dimensions of the array acoustic receiver 107 are: 700mm long × 25mm wide × 10mm high. Optionally, the bottom edge of the array acoustic receiver 107 is 100mm away from the horizontal plane where the central axis of the fracturing hole 112 is located. Optionally, the side edge of the array acoustic receiver 107 is 10mm away from both the inner and outer walls of the sliding sleeve body 101. Optionally, the array acoustic receiver 107 includes four acoustic receivers arranged sequentially, namely a first acoustic receiver 107a, a second acoustic receiver 107b, a third acoustic receiver 107c, and a fourth acoustic receiver 107d. Optionally, the distance between adjacent acoustic receivers is 150mm.

[0064] like Figure 1As shown, a cementing sleeve opening monitoring device based on array acoustic waves further includes: an array acoustic wave receiver protective cover 108, which is disposed outside the array acoustic wave receiver 107 to seal the array acoustic wave receiver 107 within the second mounting groove, thereby protecting the array acoustic wave receiver 107. Optionally, the array acoustic wave receiver protective cover 108 is made of stainless steel. Optionally, the contact surface between the array acoustic wave receiver protective cover 108 and the second mounting groove is sealed with an O-ring and fixed with screws, serving a sealing and pressure-bearing function to prevent mud and fracturing fluid from entering the second mounting groove and damaging the array acoustic wave receiver 107.

[0065] Optionally, the mounting slot includes a third mounting slot, which is a cuboid slot formed on the inner side of the side wall of the sliding sleeve body 101, for mounting the communication circuit module 110. Optionally, the dimensions of the third mounting slot are: length 220mm × width 30mm × height 15mm. Optionally, the dimensions of the communication circuit module 110 are: length 181mm × width 25mm × height 7mm. Optionally, the distance from the side edge of the communication circuit module 110 to both the inner and outer walls of the sliding sleeve body 101 is 10mm. Optionally, the array acoustic receiver 107 is connected to the communication circuit module 110 via an electrical wire 109.

[0066] like Figure 1 As shown, a cementing sleeve opening monitoring device based on array acoustic waves further includes: a circuit protection chamber 111, which is disposed outside the communication circuit module 110 and is used to seal the communication circuit module 110 within the third mounting groove to protect the communication circuit module 110. Optionally, the circuit protection chamber 111 is made of stainless steel. Optionally, the contact surface between the circuit protection chamber 111 and the third mounting groove is sealed with an O-ring and fixed with screws, which serves to seal and bear pressure, preventing mud and fracturing fluid from entering the third mounting groove and damaging the communication circuit module 110.

[0067] like Figure 1 as well as Figure 2 As shown, the sliding sleeve body 101 is located inside the cement sheath 102, and the outer side of the cement sheath 102 is the formation 103 to be fractured. A slider 104 is installed on the sliding sleeve body 101, as shown... Figure 1 As shown, when the sleeve is closed, the slider 104 blocks the fracturing hole 112, and no communication channel is established between the inside and outside of the casing, making fracturing operations impossible. Figure 2 As shown, when the sleeve is opened, the slider 104 falls off the sleeve body 101 under the action of external force, the fracturing hole 112 opens, and a communication channel is established between the inside and outside of the casing, so that fracturing operations can be carried out.

[0068] It should be noted that there are various types of sliding sleeves and sliding sleeve opening methods. Generally speaking, the slider 104 will remain on the sliding sleeve body 101 without accurate position coordinates. The downhole cementing sliding sleeve opened or closed by the slider can be monitored by the downhole cementing sliding sleeve opening device and method disclosed in this invention. This invention does not limit the type of sliding sleeve or the sliding sleeve opening method.

[0069] Optionally, the communication circuit module 110 includes: a sound wave calculation unit, a speed judgment unit, and a result output unit.

[0070] Specifically, the acoustic wave calculation unit is used to calculate the velocity of the first acoustic wave to arrive at the array acoustic wave receiver 107 based on the acoustic wave signal, and records it as the first wave velocity. Optionally, the first wave velocity can be calculated using the time-slowness correlation method.

[0071] Specifically, the velocity judgment unit is used to compare the velocity of the sound wave propagating in the slider 104, the velocity of the sound wave propagating in the cement ring 102, and the velocity of the first wave to obtain a comparison result. Optionally, the slider 104 is made of stainless steel. Optionally, the velocity of the sound wave in the slider is 5000 m / s. Optionally, the cement ring 102 is made of low-density cement. Optionally, the velocity of the sound wave in the cement ring is 2500 m / s.

[0072] Specifically, the result output unit is used to output a shut-off signal when the comparison result is that the slider acoustic wave velocity is equal to the first wave velocity, indicating that the sliding sleeve is in a closed state, and to output an open signal when the comparison result is that the cement ring acoustic wave velocity is equal to the first wave velocity, indicating that the sliding sleeve is in an open state.

[0073] Optionally, the sound wave transmitter 105 emits a sound wave signal, which first reaches the sound wave receiver 107 after passing through the sliding block 104 or the cement ring 102. The communication circuit module 110 processes the waveform received by the sound wave receiver 107 in real time, calculates the initial wave velocity of the received waveform, and uploads the status information of the sliding block to the ground in real time. Further, the communication circuit module 110 compares the calculated initial wave velocity with the sound wave velocity of the sliding block. If they are equal, it is assumed that the sound wave signal propagates along the sliding block 104 and reaches the sound wave receiver 107 first, thus determining that the sliding block is in the closed state. If the initial wave velocity is not equal to the sound wave velocity of the sliding block, or if the initial wave velocity is equal to the sound wave velocity of the cement ring, it is assumed that the sound wave signal propagates along the cement ring 102 and reaches the sound wave receiver 107 first, thus determining that the sliding block is in the open state.

[0074] like Figure 1As shown, when the sliding sleeve is closed, the acoustic transmitter 105 emits an acoustic signal, and the array acoustic receiver 107 transmits the received acoustic signal to the communication circuit module 110 via the electrical line 109. The communication circuit module 110 calculates the initial wave velocity using an algorithm (e.g., the time slowness correlation method, STC). If the initial wave velocity is equal to the acoustic velocity of the slider, the communication circuit module 110 transmits a closing signal to the ground via wireless transmission (e.g., electromagnetic wave transmission, acoustic remote transmission). Upon receiving the closing signal, the ground knows that the slider 104 is still installed on the sliding sleeve body 101, i.e., the sliding sleeve is closed.

[0075] like Figure 1 As shown, when the sliding sleeve is closed, the slider 104 and the sliding sleeve body 101 are in close contact. The acoustic signal emitted by the acoustic transmitter 105 includes at least two propagation paths. The first propagation path is along the sliding sleeve body 101 and the slider 104 to reach the array acoustic receiver 107. Since the slider 104 blocks the fracturing hole 112, the second propagation path is along the sliding sleeve body 101 and the fracturing hole 112. The acoustic signal propagates along the fracturing hole 112 and reaches the array acoustic receiver 107 as a direct wave. In practice, the slider 104 is generally made of a hard material (e.g., stainless steel), and the acoustic velocity is 5000 m / s. The slider 104 and the fracturing hole 112 are different propagation media for the acoustic signal; therefore, the order in which the acoustic signal reaches the array acoustic receiver 107 along the two propagation paths is different.

[0076] like Figure 3 As shown in the time-slowness correlation diagram, the first two waves arriving at the array acoustic receiver 107 are a Collar wave and a P wave, respectively. The slowness of the Collar wave is 200 μs / m, and the slowness of the P wave is 400 μs / m, indicating that the Collar wave (wave speed 5000 m / s) arrives at the array acoustic receiver 107 along the propagation path of the slider 104. Therefore, in the time-slowness correlation diagram, if the first wave is a Collar wave, it means that the slider 104 is still mounted on the sliding sleeve body 101, that is, the sliding sleeve is closed.

[0077] like Figure 2 As shown, when the sliding sleeve is open, the sound wave transmitter 105 emits a sound wave signal, and the array sound wave receiver 107 transmits the received sound wave signal to the communication circuit module 110 via the electrical line 109. The communication circuit module 110 calculates the initial wave velocity using an algorithm (e.g., the time slowness correlation method, STC). If the initial wave velocity is equal to the sound wave velocity of the cement ring, the communication circuit module 110 transmits the opening signal to the ground via wireless transmission (e.g., electromagnetic wave transmission, sound wave telemetry). After receiving the opening signal, the ground knows that the slider 104 has detached from the sliding sleeve body 101, that is, the sliding sleeve is open.

[0078] like Figure 2 As shown, when the sliding sleeve is opened, the slider 104 has already detached from the sliding sleeve body 101. The propagation path of the acoustic wave signal emitted by the acoustic wave transmitter 105 is preferably along the sliding sleeve body 101 and the cement ring 102. This is because the fracturing hole 112 is a hollow hole or filled with low-density cement slurry. The material difference between the filling material inside the sliding sleeve body 101 and the fracturing hole 112 is very large, that is, the wave impedance difference is very large. When the acoustic wave propagates, it will be greatly attenuated at the fracturing hole 112. That is, the acoustic wave cannot propagate in the form of a direct wave, but in the form of a sliding wave. The cement ring 102 is made of low-density cement, and the acoustic wave velocity is 2500m / s.

[0079] like Figure 4 As shown in the time-slowness correlation diagram, the first wave arriving at the array acoustic receiver 107 is a P-wave, with a slowness of 400 μs / m. This indicates that the P-wave (wave speed 2500 m / s) arrives at the array acoustic receiver 107 along the propagation path of the cement ring 102. Therefore, if the first wave in the time-slowness correlation diagram is a P-wave, it means that the slider 104 has detached from the sliding sleeve body 101, i.e., the sliding sleeve is open.

[0080] In summary, this invention obtains the open or closed status information of the sliding sleeve by receiving the waveform from the array acoustic receiver 107, and then uses the communication circuit module 110 to upload the status information of the sliding sleeve to the ground, so that the ground can obtain the status information of the sliding sleeve in real time. This solves the problem that the prior art cannot accurately determine whether the sliding sleeve is open in real time. It has the advantages of simple device, reliable monitoring and correct judgment, thus providing technical services for staged fracturing operations. It is of great significance for improving the efficiency of on-site fracturing and well completion operations and reducing construction costs.

[0081] Figure 5 A flowchart of a cementing sleeve opening monitoring method based on array acoustic waves according to an embodiment of the present invention is shown.

[0082] like Figure 5 As shown, in step S1, a ball or dart is thrown into the well to pressurize and open the sliding sleeve, and the slider 104 falls off the sliding sleeve.

[0083] like Figure 5 As shown, in step S2, the acoustic transmitter 105 emits acoustic waves. Optionally, the acoustic transmitter 105, located below the fracturing hole 112, emits acoustic signals.

[0084] like Figure 5 As shown, in step S3, the array acoustic receiver 107 receives acoustic waves. Optionally, the acoustic signal is received by the array acoustic receiver 107 disposed above the fracturing hole 112.

[0085] like Figure 5 As shown, in step S4, the STC algorithm is used to calculate the first wave velocity. Optionally, the STC algorithm is used by the communication circuit module 110 to calculate the velocity of the first sound wave arriving at the array acoustic receiver 107, and this velocity is recorded as the first wave velocity.

[0086] like Figure 5 As shown, in step S5, it is determined whether the initial wave velocity is equal to the slider acoustic wave velocity. Optionally, the communication circuit module 110 compares whether the initial wave velocity is equal to the slider acoustic wave velocity.

[0087] If the judgment result of step S5 is yes, then return to step S2; if the judgment result of step S5 is no, then in step S6, determine whether the initial wave velocity is equal to the acoustic wave velocity of the cement ring. Optionally, the comparison of whether the initial wave velocity is equal to the acoustic wave velocity of the cement ring is made through the communication circuit module 110.

[0088] If the judgment result of step S6 is negative, then return to step S2. If the judgment result of step S6 is positive, then in step S7, the communication circuit module 110 generates the sliding sleeve status information that the sliding sleeve has been opened. In step S8, data (sliding sleeve status information) is sent to the ground through the communication circuit module 110. In step S9, the ground receives the sliding sleeve status information that the sliding sleeve is open. In step S10, the ground begins fracturing operations.

[0089] The cementing sleeve opening monitoring device and method based on array acoustic waves provided by this invention can also be used in conjunction with a computer-readable storage medium. The storage medium stores a computer program, which is executed to run the cementing sleeve opening monitoring method based on array acoustic waves. The computer program is capable of executing computer instructions, which include computer program code. The computer program code can be in the form of source code, object code, executable file, or some intermediate form.

[0090] Computer-readable storage media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0091] It should be noted that the contents of computer-readable storage media may be appropriately added to or subtracted from the contents according to the requirements of legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable storage media may not include electrical carrier signals and telecommunication signals.

[0092] In summary, this invention provides a cementing sleeve opening monitoring device and method based on array acoustic waves. It employs an acoustic transmitter positioned below the fracturing hole to emit acoustic signals, and an array acoustic receiver positioned above the fracturing hole to receive these signals. A communication circuit module connected to the array acoustic receiver calculates the initial wave velocity reaching the receiver, determining whether the initial wave velocity is the cement sheath acoustic velocity or the slide block acoustic velocity, thereby obtaining information on whether the sleeve is open or closed. This invention solves the problem of existing technologies being unable to accurately determine whether the sleeve is open in real time, and is of great significance for subsequent fracturing operations.

[0093] It should be understood that the embodiments disclosed herein are not limited to the specific structures, processing steps, or materials disclosed herein, but should be extended to equivalent substitutions of these features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0094] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0095] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0096] The phrase "an embodiment" or "an embodiment" used in this specification means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0097] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

[0098] While the embodiments disclosed in this invention are as described above, the content is merely for the purpose of facilitating understanding of the invention and is not intended to limit the invention. Any person skilled in the art to which this invention pertains may make any modifications and variations in form and detail of the implementation without departing from the spirit and scope disclosed herein; however, the scope of patent protection for this invention shall still be determined by the scope defined in the appended claims.

Claims

1. A cementing sleeve opening monitoring device based on array acoustic waves, characterized in that, The device is disposed in a mounting groove on the side wall of the sliding sleeve body, and includes: An acoustic transmitter, positioned below the fracturing hole, is used to emit acoustic signals. An array of acoustic receivers, positioned above the fracturing hole, is used to receive the acoustic signals; A communication circuit module, which is connected to the array acoustic receiver, is used to determine whether the sliding sleeve is open based on the acoustic signal; The sliding sleeve body is located inside the cement ring, and the outer side of the cement ring is the formation to be fractured. A slider is installed on the sliding sleeve body. The communication circuit module connected to the array acoustic receiver is used to calculate the velocity of the first wave reaching the array acoustic receiver, and to determine whether the first wave velocity is the acoustic velocity of the cement ring or the acoustic velocity of the slider, thereby obtaining the state information of whether the sliding sleeve is open or closed.

2. The cementing sleeve opening monitoring device based on array acoustic waves as described in claim 1, characterized in that, The mounting slot includes: The first mounting slot, which is a cuboid slot, is located on the inner side of the side wall of the sliding sleeve body and is used to mount the sound wave transmitter.

3. The cementing sleeve opening monitoring device based on array acoustic waves as described in claim 2, characterized in that, The device includes: A protective cover for the acoustic transmitter is disposed outside the acoustic transmitter to seal the acoustic transmitter within the first mounting groove, thereby protecting the acoustic transmitter.

4. The cementing sleeve opening monitoring device based on array acoustic waves as described in claim 1, characterized in that, The mounting slot includes: The second mounting slot, which is a cuboid slot, is located on the inner side of the side wall of the sliding sleeve body and is used to mount the array acoustic receiver.

5. A cementing sleeve opening monitoring device based on array acoustic waves as described in claim 4, characterized in that, The device includes: An array acoustic receiver protective cover is disposed outside the array acoustic receiver to seal the array acoustic receiver within the second mounting groove, thereby protecting the array acoustic receiver.

6. The cementing sleeve opening monitoring device based on array acoustic waves as described in claim 1, characterized in that, The mounting slot includes: The third mounting slot, which is a cuboid slot, is located on the inner side of the side wall of the sliding sleeve body and is used to mount the communication circuit module.

7. A cementing sleeve opening monitoring device based on array acoustic waves as described in claim 6, characterized in that, The device includes: A circuit protection compartment is disposed outside the communication circuit module and is used to seal the communication circuit module within the third mounting slot to protect the communication circuit module.

8. A cementing sleeve opening monitoring device based on array acoustic waves as described in any one of claims 1-7, characterized in that, When the sleeve is closed, the slider blocks the fracturing orifice, and no communication channel is established between the inside and outside of the casing, making fracturing operations impossible. When the sleeve is opened, the slider detaches from the sleeve body under external force, the fracturing orifice opens, and a communication channel is established between the inside and outside of the casing, allowing fracturing operations to be performed. The communication circuit module includes: The acoustic wave calculation unit is used to calculate the velocity of the first acoustic wave to arrive at the array acoustic wave receiver based on the acoustic wave signal, and record it as the first wave velocity. A velocity determination unit is used to compare the velocity of the sound wave transmitted in the slider, the velocity of the sound wave transmitted in the cement ring, and the velocity of the first wave to obtain a comparison result. The result output unit is used to output a shut-off signal when the comparison result is that the acoustic velocity of the slider is equal to the initial wave velocity, indicating that the sliding sleeve is in a shut-off state, and to output an open signal when the comparison result is that the acoustic velocity of the cement ring is equal to the initial wave velocity, indicating that the sliding sleeve is in an open state.

9. A method for monitoring the opening of a cementing sliding sleeve based on array acoustic waves, characterized in that, Performed by the apparatus as described in any one of claims 1-8, the method comprises the following steps: A sound wave signal is emitted by the sound wave transmitter located below the fracturing hole; The acoustic signal is received by the array of acoustic receivers positioned above the fracturing hole; The communication circuit module connected to the array acoustic receiver determines whether the sliding sleeve is open based on the acoustic signal.

10. A storage medium, characterized in that, It contains a series of instructions for performing the steps of the method as described in claim 9.

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