CN112878995A - Underground overflow detection system based on near-bit fluid dielectric characteristic measurement - Google Patents
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Abstract
The invention discloses an underground overflow detection system based on near-bit fluid dielectric property measurement, which relates to the technical field of petroleum well control and comprises an array type shaft fluid dielectric property measurement tool, a power supply management circuit, an underground computer, a sensor conditioning circuit and a dielectric property measurement sensor; wherein: the array type wellbore fluid dielectric property measuring tool is used for installing a power management circuit, a downhole computer and a sensor conditioning circuit; the power management circuit, the system component provides the required rated working voltage; the underground computer analyzes the results obtained by other modules and obtains the final judgment result through a set threshold value; the sensor conditioning circuit is connected with the dielectric characteristic measuring sensor and outputs a voltage result; the dielectric property measuring sensor comprises an annular fluid dielectric property measuring sensor array and a drilling fluid dielectric property measuring sensor in the pipe. The system can judge the overflow condition of the shaft in real time and can effectively reduce the economic loss.
Description
Technical Field
The invention relates to the technical field of petroleum well control, in particular to a detection system for judging underground overflow by measuring the dielectric property of a position close to a drill bit.
Background
The exploration and oil exploration and development must provide necessary information and material channels through drilling, the drilling cost accounts for more than 50% of the total cost of oil and gas exploration and development in the world, and if the safety of oil drilling and development is ensured, the drilling cost is greatly saved. At present, early overflow monitoring is one of the main technical means for realizing blowout prevention of oil and gas wells. The overflow in the drilling process can be found in time, precious time can be gained for removing the overflow and rebuilding pressure balance, and the difficulty of secondary well control is greatly reduced. The well control technology develops for years, and various early overflow monitoring technical methods are formed, such as a mud pit liquid level monitoring method, a micro-flow measuring method, a sound wave gas invasion monitoring method, a pressure analysis method based on PWD (pulse wave data) and the like. The technical principles adopted by various early overflow monitoring methods are different, the technical advantages are different, and certain limitations exist in field use. Therefore, in order to adapt to complicated and variable drilling conditions, the early overflow monitoring technology must adopt abundant technical means so as to achieve the aim of coexistence of real-time performance and reliability. In the prior art, a mud pit liquid level monitoring method is one of the early overflow monitoring technical methods: in the process of petroleum exploration and drilling, the slurry is continuously injected into the well and then returns to a slurry pool from the well. The mud is continuously circulated during drilling. Normally, the mud flowing out of the mud pit and the mud flowing in are balanced. If an imbalance occurs, it will mean that a blowout or a lost circulation is about to occur. The change of the slurry level reflects the change of the outflow and inflow of the slurry. Therefore, the liquid level change of the slurry pool is monitored, and the well blowout and the well leakage can be forecasted. The mud pool liquid level monitoring method has certain time delay, and accidents cannot be monitored at the first time. With the development of technology, micro-flow measurement methods have been developed, which are designed based on the magnetic coupling principle and are suitable for measuring micro-volume flows of liquids and gases. A certain flow rate of the measured medium corresponds to a position of the magnetic float in the measuring tube, which position is indicated by a pointer in the field indicator by means of magnetic coupling, and the volumetric flow rate of the liquid or gas flowing through the measuring tube can be determined by means of a reading on the scale. The micro-flow measurement method still has the following technical disadvantages: (1) although the filter with the appropriate mesh number is arranged in front of the flowmeter, the filter is blocked or stuck by impurities in the fluid due to the small caliber. (2) most of the float flowmeters with small flow rate must be vertically installed on the pipe without vibration, and the fluid flows through the meter from bottom to top without obvious inclination. Additional errors can occur if there is vibration, tilting.
In addition, the author discloses a conference paper entitled "underground overflow monitoring method and early warning device research" on a 31 st national natural gas academic annual meeting (2019) corpus (05 drilling and completion engineering) in 2019 of cynanchum paniculatum, songyang and yangning, and the paper discloses that underground complex accidents such as overflow, well kick and the like are easily caused during drilling of a stratum with a narrow mud density window. In order to find out complex accidents in time and prevent accidents from worsening, the accident condition in the drilling process is found out in time by monitoring the change condition of the dielectric constant of fluid in a shaft. In order to realize real-time measurement of the dielectric constant of fluid in a shaft, a measuring probe suitable for the dielectric property of high-temperature high-viscosity fluid is designed, the influence of frequency on the probe is analyzed through an indoor test, a method for distinguishing different media is used, the influence of the concentration of a medium solution on a measuring result is analyzed, a simulation experiment is carried out, and the feasibility of safety early warning in a drilling process by means of dielectric property monitoring is verified.
The technical scheme of the conference paper of the underground overflow monitoring method and the early warning device research still has the following defects and shortcomings in the actual use process: the dielectric characteristic measuring probe of the high-temperature high-viscosity fluid adopts a single-point type measuring scheme, the underground condition is complex, the measuring probe of the single-point type measuring scheme is easy to break down, misjudgment is caused sometimes, and the judgment accuracy rate of the underground overflow condition is not high.
Disclosure of Invention
The invention aims to provide an underground overflow detection system based on near-bit fluid dielectric characteristic measurement aiming at the defects and shortcomings of the prior art. This effectively reduces economic losses and at the same time reduces injuries and deaths from drilling accidents. Meanwhile, the invention can also solve the technical problem that the measurement probe of the single-point measurement scheme which appears in the conference paper is easy to fail and cause misjudgment in the research of the underground overflow monitoring method and the early warning device, and the accuracy rate of judging the underground overflow condition is greatly improved.
The invention is realized by adopting the following technical scheme:
a downhole flooding detection system based on near-bit fluid dielectric property measurement, characterized in that: the device comprises an array type wellbore fluid dielectric property measuring tool, a power management circuit, a downhole computer, a sensor conditioning circuit and a dielectric property measuring sensor; wherein:
the array type wellbore fluid dielectric property measuring tool is a main body of a detection system, is used for installing a power management circuit, a downhole computer and a sensor conditioning circuit, and is connected with a drill bit and a drill collar for drilling; providing a sufficiently hard and stable working environment for other devices;
the power supply management circuit is used for converting the power supply voltage provided by the communication piston ring and providing the required rated working voltage for the system components; thereby enabling all components to work normally;
the underground computer analyzes the output voltage result obtained by the sensor conditioning circuit and obtains the final judgment result through a set threshold value;
the sensor conditioning circuit is connected with the dielectric characteristic measuring sensor, namely the array measuring circuit, and the result of the output voltage is obtained through the change of the data of the sensor;
the dielectric property measuring sensor is divided into an annular fluid dielectric property measuring sensor array and a drilling fluid dielectric property measuring sensor in the pipe, and the dielectric properties of the annular fluid and the fluid in the pipe are measured respectively.
Further, a sensor conditioning circuit comprising an annulus fluid dielectric property measurement sensor array comprising capacitance C11, capacitance C21, capacitance C31, capacitance C12, capacitance C22 and capacitance C32, a drilling fluid dielectric property measurement sensor within the pipe, and a plurality of resistors; the in-pipe drilling fluid dielectric property measuring sensor comprises a capacitor C41 and a capacitor C42; the resistors comprise a resistor R11, a resistor R12, a resistor R21, a resistor R22, a resistor R31, a resistor R32, a resistor R41 and a resistor R42; the circuit connection mode is as follows: a resistor circuit formed by serially connecting a resistor R11, a resistor R12, a resistor R21 and a resistor R22 in sequence is connected in parallel with a resistor circuit formed by serially connecting a resistor R42, a resistor R41, a resistor R32 and a resistor R31 in sequence and is connected under the same excitation; the capacitor C11, the capacitor C21 and the capacitor C31 are connected with the resistor R11 in parallel; the capacitor C41 is connected with the resistor R21 in parallel; the capacitor C12, the capacitor C22 and the capacitor C32 are connected with the resistor R31 in parallel; the capacitor C42 is connected with the resistor R41 in parallel; the output voltage is the voltage difference between the resistor R41 and the resistor R32 and between the resistor R12 and the resistor R21.
Further, the array of annular fluid dielectric property measurement sensors is disposed in the annular fluid.
Further, the sensor for measuring the dielectric property of the drilling fluid in the pipe is arranged in the fluid in the pipe.
Furthermore, the annular fluid dielectric characteristic measurement sensor array adopts a cover plate type mounting structure for maintenance convenience.
Furthermore, the sensor for measuring the dielectric property of the drilling fluid in the pipe takes the fluid flow pattern into consideration and adopts a planar design. Preventing erosion of the sensor.
Furthermore, the array type shaft fluid dielectric property measuring tool is provided with a wire groove, and the power management circuit, the underground computer and the sensor conditioning circuit are connected through the wire groove.
Furthermore, the array type borehole fluid dielectric property measuring tool is also provided with a communication piston ring, and the communication piston ring is used for supplying power to the measuring tool and transmitting a measuring signal to the MWD.
Furthermore, the array type borehole fluid dielectric property measuring tool is provided with an underground computer module instrument bin, and the underground computer is arranged in the underground computer module instrument bin.
Furthermore, a sensor conditioning circuit instrument bin is arranged on the array type shaft fluid dielectric property measuring tool, and the sensor conditioning circuit is arranged in the sensor conditioning circuit instrument bin.
Furthermore, the array type shaft fluid dielectric property measuring tool is provided with a power management circuit instrument bin, and the power management circuit is installed in the power management circuit instrument bin.
The using method of the underground overflow detection system comprises the following steps: step 1: firstly, a high-temperature high-voltage test is carried out on a designed and manufactured power management circuit, an underground computer and a sensor conditioning circuit. Step 2: and carrying out high-temperature and high-pressure test on the array type wellbore fluid dielectric property measuring tool. And step 3: a power management circuit, a downhole computer and a sensor conditioning circuit are arranged on the array type borehole fluid dielectric property measuring tool. And 4, step 4: the device is connected with a power management circuit, a downhole computer and a sensor conditioning circuit through a wire groove in the array type shaft fluid dielectric property measuring tool, and the power management circuit, the downhole computer and the sensor conditioning circuit are respectively connected with the sensor. And 5: and connecting the array type borehole fluid dielectric property measuring tool with other drilling tools to prepare for descending the well. Step 6: after the well is lowered, the device monitors in real time. The invention can realize the change of the output voltage of the circuit underground, thereby judging the change of the fluid medium, namely judging the overflow condition of the drilling device. Because the detection system is arranged at the position close to the drill bit in the well, the detection system does not have delay; and a downhole computer is arranged in the downhole, so that the detection system does not need to transmit data and can judge the overflow condition in real time.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts an underground overflow detection system consisting of an array type shaft fluid dielectric property measuring tool, a power supply management circuit, an underground computer, a sensor conditioning circuit and a dielectric property measuring sensor, and judges the shaft overflow condition in real time through the change of circuit output voltage caused by the change of the internal and external dielectric properties of a drilling shaft, thereby judging whether a drilling accident occurs. This effectively reduces economic losses and at the same time reduces injuries and deaths from drilling accidents. Meanwhile, compared with the technical problem that a measurement probe of a single-point measurement scheme in the meeting paper is easy to fail and cause misjudgment in the research of an underground overflow monitoring method and an early warning device, the method adopts an array type shaft fluid dielectric property measurement tool and is matched with a sensor conditioning circuit, and the underground overflow condition judgment accuracy rate is greatly improved in the actual use process.
2. In the invention, the power management circuit, the downhole computer and the sensor conditioning circuit are all arranged on the array type wellbore fluid dielectric property measuring tool and are connected with the drill bit and the drill collar for drilling, so that a sufficiently hard and stable working environment can be provided for other devices. And a downhole computer is arranged in the downhole, so that the detection system does not need to transmit data and can judge the overflow condition in real time. Meanwhile, the detection system is arranged at the position close to the drill bit in the well, so that the detection system does not delay.
3. The sensor conditioning circuit adopted by the invention comprises an annular fluid dielectric property measuring sensor array, a drilling fluid dielectric property measuring sensor in a pipe and a plurality of resistors, and the specific array connection mode does not directly cause circuit damage when a certain capacitor fails, thereby improving the anti-interference capability. And the change of the dielectric property can be reflected more quickly by using a plurality of annular capacitors, and even if a small change occurs, the change can be reflected from the output voltage at the first time, so that the sensitivity and the response speed are improved.
4. In the invention, because the array type borehole fluid dielectric property measuring tool is provided with a plurality of capacitors which are respectively arranged at the annular fluid and the fluid environment in the borehole, and the capacitors with the same specification can change in the capacitance in different media, when an accident happens underground, the fluid medium in the fluid can change, and the change of the fluid medium can cause the change of the capacitance, thereby obtaining the change of the output voltage. The flooding condition can be monitored by a change in the output voltage.
5. According to the annular fluid dielectric characteristic measurement sensor array, a cover plate type installation structure is adopted, and maintenance can be facilitated.
6. According to the invention, the fluid flow pattern is considered by the drilling fluid dielectric property measuring sensor in the pipe, and the sensor can be prevented from erosion by adopting a planar design.
7. In summary, the present invention can determine the overflow condition in time because the change of the dielectric property under the well is directly monitored; the overflow condition can be automatically judged through the underground computer, so that the labor cost is reduced; a new method for judging the underground overflow is generated, and can be coupled with other methods to obtain a more accurate method.
Drawings
The invention will be described in further detail with reference to the following description taken in conjunction with the accompanying drawings and detailed description, in which:
FIG. 1 is a schematic diagram of an array wellbore fluid dielectric property measurement tool;
fig. 2 is a schematic diagram of a sensor conditioning circuit.
The labels in the figure are:
1. an array wellbore fluid dielectric property measurement tool; 2. a data communication port; 3. a sensor for measuring the dielectric property of drilling fluid in the pipe; 4. a communication piston ring; 5. an annular fluid dielectric property measurement sensor array; 6. an annulus pressure temperature measurement sensor; 7. a downhole computer module instrument bay; 8. a sensor conditioning circuit instrument bin; 9. a power management circuit instrument bin; 10. a point of pressure measurement within the tube; c11, C21, C31, C12, C22, C32 are arrays of annular fluid dielectric property measurement sensors in annular fluid, C41, C42 are in-pipe drilling fluid dielectric property measurement sensors in-pipe fluid. R11, R12, R21, R22, R31, R32, R41, and R42 are resistors.
Detailed Description
Example 1
The invention discloses a near-bit fluid dielectric property measurement-based underground overflow detection system, which comprises an array type shaft fluid dielectric property measurement tool 1, a power management circuit, an underground computer, a sensor conditioning circuit and a dielectric property measurement sensor, wherein the array type shaft fluid dielectric property measurement tool comprises a base, a sensor and a sensor; wherein: the array type shaft fluid dielectric property measuring tool 1 is a main body of a detection system, is used for installing a power management circuit, a downhole computer and a sensor conditioning circuit, and is connected with a drill bit and a drill collar for drilling; providing a sufficiently hard and stable working environment for other devices; the power supply management circuit is used for converting the power supply voltage provided by the communication piston ring 4 and providing the required rated working voltage for the system components; thereby enabling all components to work normally; the underground computer analyzes the output voltage result obtained by the sensor conditioning circuit and obtains the final judgment result through a set threshold value; the sensor conditioning circuit is connected with the dielectric characteristic measuring sensor, namely the array measuring circuit, and the result of the output voltage is obtained through the change of the data of the sensor; the dielectric property measuring sensor is divided into an annular fluid dielectric property measuring sensor array 5 and a drilling fluid dielectric property measuring sensor 3 in the pipe, and the dielectric properties of the annular fluid and the fluid in the pipe are measured respectively.
Example 2
As another preferred embodiment of the present invention, on the basis of example 1, further, the sensor conditioning circuit includes an annulus fluid dielectric characteristic measurement sensor array 5, a drilling fluid dielectric characteristic measurement sensor 3 in the pipe, and a plurality of resistors, where the annulus fluid dielectric characteristic measurement sensor array 5 includes a capacitor C11, a capacitor C21, a capacitor C31, a capacitor C12, a capacitor C22, and a capacitor C32; the in-pipe drilling fluid dielectric property measurement sensor 3 comprises a capacitor C41 and a capacitor C42; the resistors comprise a resistor R11, a resistor R12, a resistor R21, a resistor R22, a resistor R31, a resistor R32, a resistor R41 and a resistor R42; the circuit connection mode is as follows: a resistor circuit formed by serially connecting a resistor R11, a resistor R12, a resistor R21 and a resistor R22 in sequence is connected in parallel with a resistor circuit formed by serially connecting a resistor R42, a resistor R41, a resistor R32 and a resistor R31 in sequence and is connected under the same excitation; the capacitor C11, the capacitor C21 and the capacitor C31 are connected with the resistor R11 in parallel; the capacitor C41 is connected with the resistor R21 in parallel; the capacitor C12, the capacitor C22 and the capacitor C32 are connected with the resistor R31 in parallel; the capacitor C42 is connected with the resistor R41 in parallel; the output voltage is the voltage difference between the resistor R41 and the resistor R32 and between the resistor R12 and the resistor R21.
Example 3
As a best mode for carrying out the invention, in addition to example 2,
the array type borehole fluid dielectric property measuring tool 1 is a main body of the tool, is used for placing other modules, is connected with a drill bit, a drill collar and the like for drilling, and provides a sufficiently hard and stable working environment for other devices. And the power supply management circuit is used for converting the power supply voltage provided by the communication piston ring 4 and providing the required rated working voltage for each module, so that each module can work normally. And the underground computer analyzes the results obtained by other modules and obtains the final judgment result through a set threshold value. And the sensor conditioning circuit is connected with the dielectric characteristic measuring sensor, namely the array measuring circuit, and obtains the result of the output voltage through the change of the data of the sensor. The dielectric property measuring sensor is divided into an annular fluid dielectric property measuring sensor array 5 and a drilling fluid dielectric property measuring sensor 3 in the pipe, and the dielectric properties of the annular fluid and the fluid in the pipe are measured respectively. The annular fluid dielectric characteristic measurement sensor array 5 adopts a cover plate type mounting structure for maintenance convenience; the dielectric property measuring sensor 3 for the drilling fluid in the pipe considers the fluid flow pattern, adopts a plane design and prevents the sensor from erosion. The array type borehole fluid dielectric property measurement tool 1 is also provided with a communication piston ring 4, and the communication piston ring 4 is used for supplying power to the array type borehole fluid dielectric property measurement tool 1 and transmitting a measurement signal to the MWD. The array type shaft fluid dielectric property measuring tool 1 is provided with a downhole computer module instrument bin 7, and the downhole computer is arranged in the downhole computer module instrument bin 7. The array type wellbore fluid dielectric property measuring tool 1 is provided with a sensor conditioning circuit instrument bin 8, and the sensor conditioning circuit is installed in the sensor conditioning circuit instrument bin 8. The array type shaft fluid dielectric property measuring tool 1 is provided with a power management circuit instrument chamber 9, and a power management circuit is arranged in the power management circuit instrument chamber 9.
The scheme comprises the following installation and specific operation steps:
step 1: firstly, a high-temperature high-voltage test is carried out on a designed and manufactured power management circuit, an underground computer and a sensor conditioning circuit. Because the underground environment is an extreme environment, the circuit boards and the sensors can work normally under the high-temperature and high-pressure environment, and accurate results can be obtained under the environment. The circuit board and the sensor are prevented from being damaged or obtaining wrong and overlarge results due to overlarge temperature and pressure.
Step 2: the array type borehole fluid dielectric property measuring tool 1 is subjected to a high-temperature high-pressure test, and good sealing performance is guaranteed. The liquid in the well can enter the tool due to poor tightness of the tool when the tool is drilled down, so that the detection result of the tool on overflow is influenced, and even the circuit board is damaged due to the liquid entering the tool.
And step 3: a power management circuit, a downhole computer and a sensor conditioning circuit are arranged on the array type shaft fluid dielectric property measuring tool 1, and all components are ensured to be tightly attached to a groove of the tool. The damage or falling of components on the circuit board caused by vibration and other conditions can be avoided.
And 4, step 4: the apparatus was connected to the three plates by wiring chase connections in the array wellbore fluid dielectric property measurement tool 1. And checking whether the voltages of all points are normal or not, and whether all the voltages to be operated reach the rated voltage or not, namely whether the normal operation can be realized or not. After the tool is determined to be normal, the upper cover plate is tightly covered, so that the tool is ensured to have good sealing performance, and the tool cannot be damaged due to the drilling action of the tool in the underground.
And 5: the array type borehole fluid dielectric property measurement tool 1 is connected with other well drilling tools to prepare for well descending.
Step 6: after the well is lowered, the device monitors in real time. Because the array-type wellbore fluid dielectric characteristic measuring tool 1 is provided with a plurality of capacitors which are respectively arranged at the annular fluid and the fluid environment in the pipe, and the capacitors with the same specification can change in the capacitance in different media, when an accident happens underground, the fluid media in the fluid can change, and the change of the fluid media can cause the change of the capacitance, so that the change of the output voltage can be obtained. The flooding condition can be monitored by a change in the output voltage.
Claims (10)
1. A downhole flooding detection system based on near-bit fluid dielectric property measurement, characterized in that: the device comprises an array type wellbore fluid dielectric property measuring tool (1), a power supply management circuit, a downhole computer, a sensor conditioning circuit and a dielectric property measuring sensor; wherein:
the array type wellbore fluid dielectric property measuring tool (1) is a main body of a detection system, is used for installing a power management circuit, a downhole computer and a sensor conditioning circuit, and is connected with a drill bit and a drill collar for drilling;
the power supply management circuit is used for converting the power supply voltage provided by the communication piston ring (4), and the system components provide the required rated working voltage;
the underground computer analyzes the output voltage result obtained by the sensor conditioning circuit and obtains the final judgment result through a set threshold value;
the sensor conditioning circuit is connected with the dielectric characteristic measuring sensor and obtains a result of output voltage through the change of sensor data;
the dielectric property measuring sensor is divided into an annular fluid dielectric property measuring sensor array (5) and a drilling fluid dielectric property measuring sensor (3) in the pipe, and the dielectric properties of annular fluid and the dielectric properties of fluid in the pipe are measured respectively.
2. The near-bit fluid dielectric property measurement based downhole flooding detection system of claim 1, wherein: a sensor conditioning circuit comprising an annulus fluid dielectric property measurement sensor array (5), a borehole fluid dielectric property measurement sensor (3) within a tubular, and a plurality of resistors, the annulus fluid dielectric property measurement sensor array (5) comprising a capacitance C11, a capacitance C21, a capacitance C31, a capacitance C12, a capacitance C22, and a capacitance C32; the in-pipe drilling fluid dielectric property measurement sensor (3) comprises a capacitor C41 and a capacitor C42; the resistors comprise a resistor R11, a resistor R12, a resistor R21, a resistor R22, a resistor R31, a resistor R32, a resistor R41 and a resistor R42; the circuit connection mode is as follows: a resistor circuit formed by serially connecting a resistor R11, a resistor R12, a resistor R21 and a resistor R22 in sequence is connected in parallel with a resistor circuit formed by serially connecting a resistor R42, a resistor R41, a resistor R32 and a resistor R31 in sequence and is connected under the same excitation; the capacitor C11, the capacitor C21 and the capacitor C31 are connected with the resistor R11 in parallel; the capacitor C41 is connected with the resistor R21 in parallel; the capacitor C12, the capacitor C22 and the capacitor C32 are connected with the resistor R31 in parallel; the capacitor C42 is connected with the resistor R41 in parallel; the output voltage is the voltage difference between the resistor R41 and the resistor R32 and between the resistor R12 and the resistor R21.
3. The near-bit fluid dielectric property measurement based downhole flooding detection system of claim 1, wherein: the annular fluid dielectric property measurement sensor array (5) is arranged in the annular fluid; the sensor (3) for measuring the dielectric property of the drilling fluid in the pipe is arranged in the fluid in the pipe.
4. The near-bit fluid dielectric property measurement based downhole flooding detection system of claim 1, wherein: the annular fluid dielectric characteristic measurement sensor array (5) adopts a cover plate type mounting structure.
5. The near-bit fluid dielectric property measurement based downhole flooding detection system of claim 1, wherein: the dielectric property measuring sensor (3) of the drilling fluid in the pipe adopts a planar design.
6. The near-bit fluid dielectric property measurement based downhole flooding detection system of claim 1, wherein: the array type shaft fluid dielectric property measuring tool (1) is provided with a wire groove, and a power management circuit, a downhole computer and a sensor conditioning circuit are connected through the wire groove.
7. The near-bit fluid dielectric property measurement based downhole flooding detection system of claim 1, wherein: the array type borehole fluid dielectric property measuring tool (1) is further provided with a communication piston ring (4), and the communication piston ring (4) is used for supplying power to the array type borehole fluid dielectric property measuring tool (1) and transmitting a measuring signal to the MWD.
8. The near-bit fluid dielectric property measurement based downhole flooding detection system of claim 1, wherein: an underground computer module instrument bin (7) is arranged on the array type borehole fluid dielectric property measuring tool (1), and an underground computer is arranged in the underground computer module instrument bin (7).
9. The near-bit fluid dielectric property measurement based downhole flooding detection system of claim 1, wherein: the array type wellbore fluid dielectric property measuring tool (1) is provided with a sensor conditioning circuit instrument bin (8), and the sensor conditioning circuit is arranged in the sensor conditioning circuit instrument bin (8).
10. The near-bit fluid dielectric property measurement based downhole flooding detection system of claim 1, wherein: the array type shaft fluid dielectric property measuring tool (1) is provided with a power management circuit instrument bin (9), and a power management circuit is installed in the power management circuit instrument bin (9).
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| CN113266339A (en) * | 2021-07-08 | 2021-08-17 | 西安石油大学 | Downhole drilling tool assembly distributed measurement system based on optical fiber sensor |
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