CN116906028A - Real-time imaging acquisition control system of wall of a well supersound - Google Patents
Real-time imaging acquisition control system of wall of a well supersound Download PDFInfo
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- CN116906028A CN116906028A CN202310923657.4A CN202310923657A CN116906028A CN 116906028 A CN116906028 A CN 116906028A CN 202310923657 A CN202310923657 A CN 202310923657A CN 116906028 A CN116906028 A CN 116906028A
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- 238000003384 imaging method Methods 0.000 title claims abstract description 35
- 239000000523 sample Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000012545 processing Methods 0.000 claims description 13
- 230000033001 locomotion Effects 0.000 claims description 8
- 210000000988 bone and bone Anatomy 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000002604 ultrasonography Methods 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 230000006872 improvement Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/002—Survey of boreholes or wells by visual inspection
- E21B47/0025—Survey of boreholes or wells by visual inspection generating an image of the borehole wall using down-hole measurements, e.g. acoustic or electric
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/26—Storing data down-hole, e.g. in a memory or on a record carrier
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Abstract
The invention relates to the technical field of ground stress measurement, in particular to a well wall ultrasonic real-time imaging acquisition control system. The system of the invention comprises: an upper packer, a fracturing section and a lower packer; the acoustic device of the fracturing section comprises: the device comprises an inner waterway pipeline, N energy converters, an energy converter fixing frame, a spiral reciprocating screw rod, a lantern body and an acoustic window shell; n transducers are fixed on the transducer fixing frame, and the probe emitting surface of each transducer is arranged towards the sound-transmitting window shell; the transducer fixing frame is nested on the spiral reciprocating screw rod between the inner waterway pipeline and the sound-transmitting window shell; the spiral reciprocating screw drives N transducers of the transducer fixing frame to rotate around the well circumference and drives each transducer to reciprocate up and down; the upper packer and the lower packer are communicated with an inner waterway pipeline of the fracturing section; and injecting water to the upper packer and the lower packer through the inner waterway pipeline, so that the upper packer and the lower packer are tightly abutted against the inner side of the well wall to fix the position of the system.
Description
Technical Field
The invention relates to the technical field of ground stress measurement, in particular to a well wall ultrasonic real-time imaging acquisition control system.
Background
During the fracturing of the formation, the formation fracture distribution may change in real time. However, the prior art (the die orientation technology, the traditional ultrasonic imaging logging and the like) cannot monitor the stratum fracturing effect in real time, and as the depth increases, the defects of the prior art are more obvious, and the accuracy and the reliability of the measurement result are seriously affected. According to the actual demand of fracturing environment, based on ultrasonic imaging test principle, a storage type hydraulic fracturing induced crack ultrasonic real-time detection device is developed.
The invention of China with publication number CN115773103A discloses an ultrasonic real-time imaging acquisition control system for inducing cracks by pressure cracking, which adopts the technical scheme that a pressure sensor is used for detecting the pressure, and a signal receiving module is started or stopped to receive ultrasonic echo signals reflected by the cracks when the pressure reaches a set threshold value. The technical scheme only solves the problem of monitoring the pressure induced cracking during underground operation, but in practice, the underground situation is complex and changeable, and the real-time measurement of the well wall is also important. The detection of the periphery of the well wall is limited, and more ultrasonic real-time imaging acquisition control systems are needed to realize comprehensive real-time monitoring of the periphery of the well wall.
At present, the conventional instrument is mostly provided with 2 probes, but only one probe is selected to work when the conventional instrument works, and different probes are switched to work in different well diameters. This results in a probe that will not be able to fully monitor the borehole wall in real time.
The invention of China with publication number of CN107830961A discloses an ultrasonic dynamic imaging device and system for underground hydraulic fracturing induced fracture, when the device and system are used, a driving mechanism can drive an ultrasonic probe to move in a pipe body along the axial direction and/or the circumferential direction of the pipe body, and the ultrasonic probe can transmit and receive ultrasonic signals capable of passing through a sound transmission window, so that the condition of well wall induced fracture can be obtained through an ultrasonic imaging technology. But the device has a complex structure and low imaging efficiency. The actual work is also a probe, is easily influenced by random noise, and the signal to noise ratio is reduced.
Disclosure of Invention
The invention aims to solve the technical problems and provides a real-time imaging acquisition control system for well wall ultrasonic, which is used for monitoring all spatial orientations and evolution processes of the well wall in real time.
In order to achieve the above purpose, the present invention is realized by the following technical scheme.
The invention provides a well wall ultrasonic real-time imaging acquisition control system, which comprises: an upper packer, a fracturing section and a lower packer; characterized in that the fracturing section comprises: a sound system device; the acoustic device includes: the device comprises an inner waterway pipeline, N transceiving integrated ultrasonic transducers, a lantern body, a transducer fixing frame, a spiral reciprocating screw rod and a sound-transmitting window shell;
the N transducers are fixed on the transducer fixing frame;
the transducer fixing frame is provided with a central opening and is nested between the inner waterway pipeline and the sound-transmitting window shell in a surrounding manner; the outer ring of the central opening is provided with a hole for embedding the transducer fixing frame on the spiral reciprocating screw rod;
the energy converter fixing frame and the spiral reciprocating screw rod are fixed on the lantern body, and the lantern body drives the energy converter fixing frame and the spiral reciprocating screw rod to perform rotary motion, and simultaneously, the spiral reciprocating screw rod drives the energy converter fixing frame to perform up-and-down reciprocating motion;
the lantern frame comprises intermittently arranged longitudinal bones, and a gap is formed between every two adjacent longitudinal bones;
the probe emission surface of each transducer is placed towards the sound-transmitting window shell and simultaneously reciprocates up and down along a gap formed between adjacent longitudinal bones along with the transducer fixing frame;
the upper packer and the lower packer are communicated with an inner waterway pipeline of the fracturing section;
when the system is placed in a well, water is injected to the upper packer and the lower packer through the inner waterway pipeline, so that the upper packer and the lower packer are tightly abutted against the inner side of the well wall to fix the position of the system.
As one of the improvements of the above technical solutions, the N transducers are uniformly surrounded on the transducer fixing frame; per rotationThe N transducers complete 360-degree real-time imaging signal acquisition in one week.
As one of the improvements of the above technical solutions, the fracturing section further includes: a driving device; the driving device includes: a motor and a planetary reducer;
the motor transmits power to the lantern body through the planetary reducer, the lantern body drives the transducer fixing frame to rotate, and the transducer fixing frame drives the spiral reciprocating screw rod to rotate;
intermittent mechanisms are uniformly arranged on the spiral reciprocating screw rod, and the transducer fixing frame is controlled to ascend or descend through the intermittent mechanisms.
As one of the improvements of the above technical solutions, the fracturing section further includes: a control device; the control device includes: a motor driving plate;
the motor driving plate is used for controlling the motor;
the motor driving plate is sleeved with an air bag, and the air bag is connected with the acoustic device and used for keeping the internal pressure and the external pressure of the acoustic device consistent.
As one of the improvement of the technical scheme, after the system is fixed in position, a gap exists between the fracturing section and the inner side of the well wall, water is injected into the gap between the fracturing section and the inner side of the well wall through an inner water channel pipeline, and after the fracturing section and the inner side of the well wall are filled with water, the whole coverage monitoring of the well wall is realized through the circumferential rotation of N transducers around the well and the up-down reciprocating motion.
As one of the improvement of the technical scheme, an acquisition control circuit is arranged in the lower packer and used for acquiring, processing and storing the data of each transducer.
As one of the improvements of the above technical scheme, silicone oil is filled between the inner waterway pipeline and the sound-transmitting window shell through an oil filling valve.
As an improvement of the foregoing technical solution, the system further includes: the system comprises a signal acquisition and processing circuit cabin and a battery cabin, wherein a signal acquisition and processing circuit and a power supply are arranged in the signal acquisition and processing circuit cabin and the battery cabin and are used for processing data of each transducer and supplying power to the system.
Compared with the prior art, the invention has the advantages that:
1. the borehole wall acoustic acquisition system can acquire dynamic images of the crack space azimuth and the evolution process thereof in the ground stress measurement process, and can greatly improve the detection efficiency;
2. the fracturing section of the ultrasonic real-time imaging device is of an ultrasonic scanning acoustic structure, the acquisition control circuit framework is placed in the lower packer without water, and data of the whole testing process are acquired and stored, so that real-time imaging of a fracturing crack in the fracturing process is realized.
Drawings
FIG. 1 is a block diagram of a borehole wall ultrasound real-time imaging acquisition control system;
FIG. 2 is a schematic diagram of a fracturing section;
FIG. 3 is a schematic diagram of actual installation of a borehole wall ultrasonic real-time imaging acquisition control;
FIG. 4 is a diagram of a transducer mount arrangement;
fig. 5 (a), 5 (b) and 5 (c) are left, front and right views, respectively, of the lantern body;
fig. 6 is a flow chart of probe signal processing in the circuitry.
Detailed Description
The technical scheme of the invention is described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1, the system is a structural diagram of a well wall ultrasonic real-time imaging acquisition control system; as shown in fig. 2, a fracturing section schematic; the acoustic part structure of the ultrasonic real-time imaging acquisition control system for the pressure-induced cracking comprises the following parts: and (3) taking a central rod of the fracturing section as an axis, deploying a spiral reciprocating screw rod, and driving 8 annular array ultrasonic transducers to circularly perform 360-degree periodic scanning movement up and down. The motor and the motor driving plate are connected with the sound system part to drive the sound system part to rotate, and meanwhile rubber is bound outside to realize the pressure balance function.
The working flow is as follows: under a certain pressure condition, the circuit system drives the motor to work. The 8 ring array ultrasonic transducers are driven by a motor to scan the wall of a fracturing section in a spiral reciprocating mode, meanwhile, the circuit system stores the acquired data in the fracturing process, after equipment is lifted to the ground, the scanned wall of the fracturing section is read and replayed by imaging processing software, imaging is displayed according to the arrival time and amplitude of wave trains and 360-degree azimuth display of the circumference of the well, and real-time imaging of fracturing cracks in the fracturing process is realized. FIG. 3 is a schematic diagram of actual installation of a borehole wall ultrasonic real-time imaging acquisition control; FIG. 4 is a diagram of a transducer mount arrangement; fig. 6 is a flow chart of probe signal processing in the circuitry.
The 8 ultrasonic transducers are uniformly distributed on the same plane, and the angle between the adjacent transducers is 45 degrees. The probe signal processing flow chart in the circuit system is shown in fig. 6:
the device of the embodiment of the invention has the advantages that:
(1) The advantages of using 8 ultrasonic probes are: firstly, random noise interference is reduced, the signal to noise ratio is improved through 8 groups of data average, and the imaging resolution is improved. And secondly, every 45 degrees of rotation can form a 360-degree real-time imaging effect graph, so that imaging instantaneity is improved.
(2) The hydraulic fracturing process and the ultrasonic detection process can be cooperatively carried out to obtain a device for inducing the dynamic image of the whole process of crack formation, expansion and closure, so that real-time imaging is truly realized.
The ultrasonic transducer and the rotary mechanical structure are arranged between the high-pressure waterway and the outer wall of the cavity of the sound-transmitting window, and the annular space filled with silicone oil is filled with the ultrasonic transducer and the rotary mechanical structure, so that the problem of high-pressure sealing of the transducer and the rotary mechanical structure is not needed to be considered. The mechanical structure driven by the motor is to realize the up-and-down reciprocating motion while the transducer rotates around the well, and the motor transmits power to the lantern body through the planetary reducer, as shown in fig. 5 (a), 5 (b) and 5 (c), which are respectively a left view, a front view and a right view of the lantern body; the lantern body transmits power to the transducer fixing frame, the transducer fixing frame drives the probe seat and the reciprocating screw pair to rotate, and the probe rotates one circle to drive the intermittent mechanism on the reciprocating screw to control the screw to ascend or descend. The acoustic system device of the annular structure is connected with the pressure balancing device (air bag) of the circuit framework shell, so that the internal pressure and the external pressure of the annular structure can be kept consistent. In some gas well environments, high-pressure gas in the well can enter the sound-transmitting circular tube, and when the pressure outside the well of the instrument is reduced, the pressure in the annular space can be unbalanced with the outside due to the existence of the gas, so that the sound-transmitting circular tube is damaged. To avoid such damage, a vent valve is used to vent the annular space of gas. The electrical connection between the rotating part and the fixed part in the acoustic structure uses a slip ring, and the contact of the slip ring needs special treatment under the environment of high-pressure oil. There is a large pressure differential between the high pressure oil and the pressure-bearing circuit capsule, and the electrical connection between them uses a single core sealing plug assembly. The oil filling valve is used for filling oil into or discharging oil from the inner cavity. The circuit pod is used to house the necessary circuit boards and associated electrical components. The probe moves in space along a reciprocating spiral line, and the spiral line is arranged very densely due to the high rotation speed of the probe, so that the probe can be considered to be used for circumferential scanning to a certain extent.
The thin layer of the sound-transmitting window is used for solving the pressure-resistant problem of the ultrasonic imaging detection device in the fracturing section, a pressure balancing device made of soft rubber is added in the design, and the sound-transmitting cavity is mutually communicated with the pressure balancing device by injecting silicone oil, so that when the external pressure rises, the pressure in the cavity is synchronously increased, and the purpose of high pressure resistance is achieved through internal and external pressure balance. Meanwhile, the acoustic characteristics and the thickness of the acoustic window must be reasonably designed, so that the signal reflected by the well wall can have a high signal-to-noise ratio and be easily identified.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and are not limiting. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the appended claims.
Claims (8)
1. A borehole wall ultrasound real-time imaging acquisition control system, the system comprising: an upper packer, a fracturing section and a lower packer; characterized in that the fracturing section comprises: a sound system device; the acoustic device includes: the device comprises an inner waterway pipeline, N transceiving integrated ultrasonic transducers, a lantern body, a transducer fixing frame, a spiral reciprocating screw rod and a sound-transmitting window shell;
the N transducers are fixed on the transducer fixing frame;
the transducer fixing frame is provided with a central opening and is nested between the inner waterway pipeline and the sound-transmitting window shell in a surrounding manner; the outer ring of the central opening is provided with a hole for embedding the transducer fixing frame on the spiral reciprocating screw rod;
the energy converter fixing frame and the spiral reciprocating screw rod are fixed on the lantern body, and the lantern body drives the energy converter fixing frame and the spiral reciprocating screw rod to perform rotary motion, and simultaneously, the spiral reciprocating screw rod drives the energy converter fixing frame to perform up-and-down reciprocating motion;
the lantern frame comprises intermittently arranged longitudinal bones, and a gap is formed between every two adjacent longitudinal bones;
the probe emission surface of each transducer is placed towards the sound-transmitting window shell and simultaneously reciprocates up and down along a gap formed between adjacent longitudinal bones along with the transducer fixing frame;
the upper packer and the lower packer are communicated with an inner waterway pipeline of the fracturing section;
when the system is placed in a well, water is injected to the upper packer and the lower packer through the inner waterway pipeline, so that the upper packer and the lower packer are tightly abutted against the inner side of the well wall to fix the position of the system.
2. The borehole wall ultrasonic real-time imaging acquisition control system according to claim 1, wherein the N transducers are uniformly surrounded on the transducer mount; per rotationThe N transducers complete 360-degree real-time imaging signal acquisition in one week.
3. The borehole wall ultrasound real-time imaging acquisition control system of claim 1, wherein the fracturing section further comprises: a driving device; the driving device includes: a motor and a planetary reducer;
the motor transmits power to the lantern body through the planetary reducer, the lantern body drives the transducer fixing frame to rotate, and the transducer fixing frame drives the spiral reciprocating screw rod to rotate;
intermittent mechanisms are uniformly arranged on the spiral reciprocating screw rod, and the transducer fixing frame is controlled to ascend or descend through the intermittent mechanisms.
4. The borehole wall ultrasound real-time imaging acquisition control system as recited in claim 3 wherein said frac section further comprises: a control device; the control device includes: a motor driving plate;
the motor driving plate is used for controlling the motor;
the motor driving plate is sleeved with an air bag, and the air bag is connected with the acoustic device and used for keeping the internal pressure and the external pressure of the acoustic device consistent.
5. The system of claim 1, wherein after the system is fixed in position, a gap is formed between the fracturing section and the inner side of the well wall, water is injected into the gap between the fracturing section and the inner side of the well wall through an inner waterway pipeline, and after the fracturing section and the inner side of the well wall are filled with water, the full coverage monitoring of the well wall is realized through the circumferential rotation and the up-and-down reciprocating motion of the N transducers around the well.
6. The system of claim 5, wherein the lower packer is internally provided with an acquisition control circuit for acquiring, processing and storing data of each transducer.
7. The system of claim 1, wherein silicone oil is filled between the inner waterway pipeline and the sound-permeable window housing through an oil filling valve.
8. The borehole wall ultrasound real-time imaging acquisition control system as recited in any one of claims 1 to 7, wherein said system further comprises: the system comprises a signal acquisition and processing circuit cabin and a battery cabin, wherein a signal acquisition and processing circuit and a power supply are arranged in the signal acquisition and processing circuit cabin and the battery cabin and are used for processing data of each transducer and supplying power to the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310923657.4A CN116906028B (en) | 2023-07-26 | 2023-07-26 | Real-time imaging acquisition control system of wall of a well supersound |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310923657.4A CN116906028B (en) | 2023-07-26 | 2023-07-26 | Real-time imaging acquisition control system of wall of a well supersound |
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| Publication Number | Publication Date |
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| CN116906028A true CN116906028A (en) | 2023-10-20 |
| CN116906028B CN116906028B (en) | 2024-01-30 |
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| CN116906028B (en) | 2024-01-30 |
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