CN117662134A - Near-bit acoustic lithology detection device, method and system - Google Patents
Near-bit acoustic lithology detection device, method and system Download PDFInfo
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- CN117662134A CN117662134A CN202211041432.8A CN202211041432A CN117662134A CN 117662134 A CN117662134 A CN 117662134A CN 202211041432 A CN202211041432 A CN 202211041432A CN 117662134 A CN117662134 A CN 117662134A
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Abstract
The invention discloses a near-bit acoustic lithology detection device, method and system, which belong to the field of geophysical exploration, and can acquire sound signals near a drill collar by installing a broadband receiving transducer, and then transmit the sound signals to a main control board for processing to acquire real-time formation lithology information. Specifically, the sound signals near the drill collar can be acquired in real time through the plurality of broadband receiving transducers, the sound signals are transmitted to the acquisition board, the main control board receives the sound signals of the acquisition board and processes the sound signals to obtain lithology information of the stratum, the acquisition of the acoustic lithology information is realized, and the plurality of broadband receiving transducers are arranged in the circumferential direction of the drill collar and can accurately acquire the lithology information of the stratum near the drill collar. Therefore, the technical scheme of the invention can solve the problem that the real-time property and the accuracy cannot be simultaneously met in the lithology determining process in the prior art.
Description
Technical Field
The invention belongs to the field of geophysical exploration, and relates to a near-bit acoustic lithology detection device, method and system.
Background
The current oil and gas exploration objects are increasingly complex, the conventional reservoir layer is developed to the unconventional reservoir layers such as compact oil and gas, shale gas and the like, the homogeneous thick layer is developed to the reservoir layers such as heterogeneous, thin layer, fault and crack, and the like, the logging while drilling and logging data are needed to be utilized for geosteering in the drilling process of horizontal wells and large-displacement wells, so that the borehole track is ensured to pass through the reservoir layer, and the lithology of the stratum drilled near the drill bit is required to be accurately known in real time. Lithology detection is the first step of reservoir evaluation and parameter calculation, and is also the basis for acquiring other reservoir information. The traditional stratum lithology detection methods are numerous, and mainly comprise methods of logging while drilling data analysis, cuttings logging analysis, logging phase analysis, drilling parameter prediction and the like. The detection of formation lithology by using logging while drilling and cuttings logging often results in poor accuracy of identifying time delays due to borehole collapse or bit wear, and problems such as time delays and possible misplacement of depth. Determination of lithology when applied to drilling is affected by bit type, weight on bit, rotational speed, mud displacement and density and viscosity, while real-time, but with multiple solutions and uncertainties. The lithology is analyzed by using the logging phases, the well section is divided into a plurality of small layers according to the characteristics of the logging curve, so that the same petrophysical properties and lithology types exist in each small layer, and whether a certain type of logging phase can effectively reflect a certain lithology characteristic depends on the layering value accuracy degree of the logging curve to a great extent. The morphology and change rule of the logging curve are controlled by lithology, and the morphology and change rule of the logging curve are also greatly influenced by the type of a logging instrument, logging speed, borehole conditions and other related factors, so that the logging curve has large variability.
Disclosure of Invention
The invention aims to solve the problem that the lithology detection device while drilling cannot meet real-time performance and accuracy simultaneously in the lithology determination process in the prior art, and provides a near-bit acoustic lithology detection device, method and system.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
the invention provides a near-bit acoustic lithology detection device, which comprises a drill collar; the outer wall surface of the drill collar is provided with a groove, an electronic circuit, a power supply unit, a communication port and a plurality of broadband receiving transducers are arranged in the groove, and each broadband receiving transducer is arranged in the circumferential direction of the drill collar; the electronic circuit comprises an acquisition board and a main control board;
the output port of the broadband receiving transducer is connected with the input port of the acquisition board, the output port of the acquisition board is connected with the input port of the main control board, and the main control board is connected with the communication port; the broadband receiving transducer and the electronic circuit are connected with the power supply unit.
Preferably, each broadband receiving transducer is mounted at equal intervals in the circumference of the drill collar.
Preferably, the number of the broadband receiving transducers is 4.
Preferably, the power supply unit is a battery.
Preferably, a sealing plate is mounted on the groove.
Preferably, the sealing plate is provided with a through hole for connecting with external equipment.
Preferably, the acquisition bandwidth of the broadband receiving transducer ranges from 200Hz to 30kHz.
The invention provides a near-bit acoustic lithology detection method, which comprises the following steps:
the power supply unit supplies power to the electronic circuit and the plurality of broadband receiving transducers;
the broadband receiving transducer collects sound signals near the drill collar, and the broadband receiving transducer transmits the sound signals to the collecting plate;
the main control board receives the sound signals transmitted by the acquisition board and processes the sound signals to obtain formation lithology information, and transmits the formation lithology information to the communication port to acquire the formation lithology information.
Preferably, the main control board acquires formation lithology information by adopting a voiceprint detection algorithm.
The invention provides a near-bit acoustic lithology detection system, which comprises:
the power supply module is used for supplying power to the broadband receiving transducer and the electronic circuit through the power supply unit;
the first information processing module is used for acquiring sound signals near the drill collar through the broadband receiving transducer, and the broadband receiving transducer transmits the sound signals to the acquisition board;
the second information processing module is used for receiving the sound signals transmitted by the acquisition board and processing the sound signals to obtain stratum lithology information, and the master control board transmits the stratum lithology information to the communication port to acquire the stratum lithology information.
Compared with the prior art, the invention has the following beneficial effects:
according to the near-bit acoustic lithology detection device provided by the invention, the broadband receiving transducer is arranged to collect the sound signals near the drill collar, and then the sound signals are transmitted to the main control board for processing, so that the real-time formation lithology information is obtained. Specifically, the sound signals near the drill collar can be acquired in real time through the plurality of broadband receiving transducers, the sound signals are transmitted to the acquisition board, the main control board receives the sound signals of the acquisition board and processes the sound signals to obtain lithology information of the stratum, the acquisition of the acoustic lithology information is realized, and the plurality of broadband receiving transducers are arranged in the circumferential direction of the drill collar and can accurately acquire the lithology information of the stratum near the drill collar. Therefore, the technical scheme of the invention can solve the problem that the real-time property and the accuracy cannot be simultaneously met in the lithology determining process in the prior art.
Further, the plurality of broadband receiving transducers are arranged at equal intervals, so that a plurality of sound signals near the drill collar can be collected, and the sound signals near the drill collar can be mastered.
Further, the sealing plate is arranged on the groove, so that an electronic circuit, a power supply unit, a communication port and a broadband receiving ring energy device in the groove are not damaged when the drill collar is in a high-temperature environment.
Further, the purpose of arranging the through hole on the sealing plate is to connect a data line on the communication port, so that the main control board can transmit information with external equipment.
Further, the acquisition bandwidth frequency is controlled to be wider in the range of 200Hz-30kHz.
According to the near-bit acoustic lithology detection method provided by the invention, the sound signals near the drill collar are collected through the broadband receiving transducer and then transmitted to the main control board, and the main control board processes the mechanical waves to obtain formation lithology information, so that the formation lithology information is detected. Therefore, the detection method provided by the invention is simple to operate and convenient to implement.
According to the near-bit acoustic lithology detection system provided by the invention, the system is divided into the power supply module, the first information processing module and the second information processing module, and the modules are mutually independent by adopting a modularized thought, so that unified management of the modules is facilitated.
Drawings
For a clearer description of the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the near-bit acoustic lithology detection device of the present invention.
Fig. 2 is a flow chart of a detection method of the near-bit acoustic lithology detection device.
FIG. 3 is a diagram of a near-bit acoustic lithology detection system of the present invention.
FIG. 4 is a spectral imaging of different formation rocks acquired during an actual drilling logging process of the present invention.
Fig. 5 is a graph of a sand spectrum of an actual drilling well logging of the present invention.
FIG. 6 is a graph of a simulated drilling test sandstone frequency spectrum according to the present invention.
Wherein: 1-an electronic circuit; 1-1-acquisition board; 1-2 parts of a main control board; 2-cell; 3-communication port; 4-broadband receiving transducers; 5-drill collar.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The invention is described in further detail below with reference to the attached drawing figures:
example 1:
the near-bit acoustic lithology detection device provided by the invention is directly connected with a drill bit in the well logging process. The structure diagram of the near-bit acoustic lithology detection device is shown in fig. 1, and the near-bit acoustic lithology detection device comprises an electronic circuit 1, a power supply unit 2, a communication port 3, a drill collar 5 and a plurality of broadband receiving transducers 4, wherein the electronic circuit 1 comprises an acquisition board 1-1 and a main control board 1-2.
The drill collar 5 is provided with a groove, the electronic circuit 1, the high-temperature battery 2, the communication port 3 and the broadband receiving transducers 4 are all arranged in the groove, and each broadband receiving transducer 4 is arranged in the circumferential direction of the drill collar 5. The broadband receiving transducer 4 can collect the rock breaking sound signals of the drill bit, the collection bandwidth reaches 200Hz-30kHz to enable the sound range to be wider, the output port of the broadband receiving transducer 4 is connected with the input port of the collecting board 1-1, the output port of the collecting board 1-1 is connected with the input port of the main control board 1-2 and used for collecting signals and processing data, and the main control board 1-2 is connected with the communication port 3 and used for storing and transmitting the signals. The communication port 3 is a special interface for parameter configuration before the detection device goes down the well and for taking out after logging; the broadband receiving transducer 4 and the electronic circuit 1 are connected with the power supply unit 2, and the power supply unit 2 is a battery and can supply power for the broadband receiving transducer 4 and the electronic circuit 1, so that the broadband receiving transducer 4 and the electronic circuit 1 can work normally.
Each broadband receiving transducer 4 is arranged at equal intervals on the circumference of the drill collar 5, and can collect a plurality of sound signals near the drill collar 5 and master the sound signals near the drill collar 5.
The sealing plate is arranged on the groove, so that the electronic circuit 1, the power supply unit 2, the communication port 3 and the broadband receiving ring energy device 4 in the groove are not damaged when the drill collar 5 is in a high-temperature environment.
The sealing plate is provided with a through hole for connecting with external equipment, so that the main control board 1-2 can transmit information with the external equipment in order to connect a data line on the communication port 3.
The number of the broadband receiving transducers 4 can be 4, namely, the broadband receiving transducers are arranged on the drill collar 5 at intervals of 90 degrees, and can acquire sound signals of four directions of the drill collar 5.
Example 2:
the invention provides a near-bit acoustic lithology detection method, which is shown in fig. 2, and comprises the following steps:
the power supply unit 2 supplies power to the plurality of broadband receiving transducers 4 and the electronic circuit 1;
the broadband receiving transducer 4 collects sound signals near the drill collar 5, and the broadband receiving transducer 4 transmits the sound signals to the collecting plate 1-1;
the main control board 1-2 receives the sound signals transmitted by the acquisition board 1-1 and processes the sound signals to obtain formation lithology information, and the main control board 1-2 transmits the formation lithology information to the communication port 3 to acquire the formation lithology information; the main control board 1-2 acquires formation lithology information by adopting a voiceprint detection algorithm.
Specific:
the method comprises the following steps of firstly, adopting a battery to supply power for a near-bit acoustic lithology detection device, arranging an electronic circuit 1, a high-temperature battery 2, a communication port 3 and a plurality of broadband receiving transducers 4 in a groove, arranging a sealing plate on the groove, arranging a through hole for connecting external equipment on the sealing plate, and distributing each broadband receiving transducer 4 on a drill collar 5 in an annular mode.
Step two, performing a simulated drilling test, acquiring sound signals near the drill collar 5 in real time by the broadband receiving transducer 4, transmitting the sound signals to the acquisition board 1-1, receiving the sound signals of the acquisition board 1-1 by the main control board 1-2, and processing the sound signals to obtain lithology information of the stratum.
And thirdly, uploading lithology information of the stratum to external equipment in real time through a communication port 3 to guide drilling construction.
Example 3:
the near-bit acoustic lithology detection system provided by the invention, as shown in fig. 3, comprises:
the power supply module is used for supplying power to the broadband receiving transducer 4 and the electronic circuit 1 by the power supply unit 2;
the first information processing module is used for acquiring sound signals near the drill collar 5 through the broadband receiving transducer 4, and the broadband receiving transducer 4 transmits the sound signals to the acquisition board 1-1;
the second information processing module is used for receiving the sound signals transmitted by the acquisition board 1-1 by the main control board 1-2 and processing the sound signals to obtain stratum lithology information, and the main control board 1-2 transmits the stratum lithology information to the communication port 3 to acquire the stratum lithology information.
As shown in fig. 4 and fig. 5, the present invention provides an example of acquiring the acoustic characteristics of the stratum rock where the drill bit is located in the real drilling logging process, wherein fig. 4 is a measurement well section drilling noise spectrum imaging diagram, fig. 5 is an extraction sandstone stratum spectrogram, fig. 6 is a simulation drilling test result, and a spectrogram of acquiring a sandstone sample. As can be seen from fig. 4, the drill bit has obvious differences in the frequency domain characteristics of noise in different lithologic strata, and lithologic distinction can be performed through spectral characteristic analysis. By comparing the sandstone solid drill with the experimental result of the simulated drilling, as shown in fig. 5, the spectral characteristics of the sandstone solid drill are basically similar, and the sandstone solid drill has the characteristics of wide frequency band and bimodal distribution, and the main frequency band is concentrated in the range of 1kHz-5 kHz.
According to the near-bit acoustic lithology detection device provided by the invention, lithology of a stratum at the bit is detected in real time by collecting and analyzing acoustic characteristics of rock breaking of the bit, stratum lithology information can be provided for geological guiding while drilling, judgment of stratum structure and reservoir characteristics and control capability of tracks of the bit in the reservoir are improved, and the tracks of the well bores are ensured to pass through desserts, so that the drilling rate of the oil layer, the drilling success rate and the recovery ratio are improved. The 4 groups of broadband receiving transducers 3 are used for collecting acoustic signals of rock breaking of the drill bit in the drilling process, spectrum analysis is carried out on the signals, samples are matched through an AI voiceprint detection algorithm, lithology of stratum at the drill bit is detected in real time, and a brand new technical scheme is provided for geological guiding while drilling. The scheme can measure the linear and nonlinear physical characteristics of stratum rock at the drill bit in real time, analyze stratum lithology, guide drilling construction, has a simple instrument structure and small data volume, is simple and convenient to use on site, and effectively solves the problems of complex construction, slow data uploading rate and the like of the conventional drilling instrument.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The near-bit acoustic lithology detection device is characterized by comprising a drill collar (5); the outer wall surface of the drill collar (5) is provided with a groove, an electronic circuit (1), a power supply unit (2), a communication port (3) and a plurality of broadband receiving transducers (4) are arranged in the groove, and each broadband receiving transducer (4) is arranged in the circumferential direction of the drill collar (5); the electronic circuit (1) comprises an acquisition board (1-1) and a main control board (1-2);
the output port of the broadband receiving transducer (4) is connected with the input port of the acquisition board (1-1), the output port of the acquisition board (1-1) is connected with the input port of the main control board (1-2), and the main control board (1-2) is connected with the communication port (3); the broadband receiving transducer (4) and the electronic circuit (1) are connected with the power supply unit (2).
2. The near-bit acoustic lithology detection device according to claim 1, wherein each broadband receiving transducer (4) is mounted at equal intervals in the circumferential direction of the drill collar (5).
3. The near-bit acoustic lithology detection device of claim 2, wherein there are 4 of the broadband receiving transducers (4).
4. The near-bit acoustic lithology detection device of claim 1, wherein the power supply unit (2) is a battery.
5. The near-bit acoustic lithology detection device of claim 1, wherein the groove is provided with a sealing plate.
6. The near-bit acoustic lithology detection device of claim 5, wherein the sealing plate is provided with a through hole for connecting an external device.
7. The near-bit acoustic lithology detection device of claim 1, wherein the acquisition bandwidth of the broadband receiving transducer (4) is in the range of 200Hz-30kHz.
8. A near-bit acoustic lithology detection method, characterized in that the near-bit acoustic lithology detection device according to any one of claims 1 to 7 is adopted, comprising the following steps:
the power supply unit (2) supplies power to the electronic circuit (1) and the plurality of broadband receiving transducers (4);
the broadband receiving transducer (4) collects sound signals near the drill collar (5), and the broadband receiving transducer (4) transmits the sound signals to the collecting plate (1-1);
the main control board (1-2) receives the sound signals transmitted by the acquisition board (1-1) and processes the sound signals to obtain formation lithology information, and the main control board (1-2) transmits the formation lithology information to the communication port (3) to acquire the formation lithology information.
9. The near-bit acoustic lithology detection method of claim 8, wherein the main control board (1-2) acquires formation lithology information by adopting a voiceprint detection algorithm.
10. A near-bit acoustic lithology detection system, characterized in that the near-bit acoustic lithology detection method according to any one of claims 8 to 9 is adopted, comprising:
the power supply module is used for supplying power to the broadband receiving transducer (4) and the electronic circuit (1) by the power supply unit (2);
the first information processing module is used for collecting sound signals near the drill collar (5) through the broadband receiving transducer (4), and the broadband receiving transducer (4) transmits the sound signals to the collecting plate (1-1);
the second information processing module is used for receiving the sound signals transmitted by the acquisition board (1-1) and processing the sound signals by the main control board (1-2) to obtain stratum lithology information, and the main control board (1-2) transmits the stratum lithology information to the communication port (3) to acquire the stratum lithology information.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211041432.8A CN117662134A (en) | 2022-08-29 | 2022-08-29 | Near-bit acoustic lithology detection device, method and system |
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| CN202211041432.8A CN117662134A (en) | 2022-08-29 | 2022-08-29 | Near-bit acoustic lithology detection device, method and system |
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| CN202211041432.8A Pending CN117662134A (en) | 2022-08-29 | 2022-08-29 | Near-bit acoustic lithology detection device, method and system |
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