CN111088975A - Water content monitoring method based on microwave three-probe oil well online water content monitor - Google Patents
Water content monitoring method based on microwave three-probe oil well online water content monitor Download PDFInfo
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- CN111088975A CN111088975A CN202010073368.6A CN202010073368A CN111088975A CN 111088975 A CN111088975 A CN 111088975A CN 202010073368 A CN202010073368 A CN 202010073368A CN 111088975 A CN111088975 A CN 111088975A
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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
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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
- 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
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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
- 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
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
Abstract
The invention discloses a moisture content monitoring method based on a microwave three-probe oil well online moisture content monitoring method, which comprises the following steps of: firstly, monitoring the flow in a test oil pipe; judging whether the flow sensor acquires data or not; thirdly, acquiring a moisture content value detected by the middle microwave probe; fourthly, judging whether the water content data detected by the middle microwave probe is less than zero; fifthly, acquiring a water content value detected by the high-order microwave probe; and sixthly, judging whether the water content data detected by the high-order microwave probe is less than zero. The invention designs a microwave three-probe structure to monitor the water content of liquid at different height levels in an oil pipe, which not only monitors the flowing state of crude oil in the pipe, but also ensures the accuracy of measurement.
Description
Technical Field
The invention belongs to the technical field of online water content monitoring of oil wells, and particularly relates to a water content monitoring method based on a microwave three-probe online water content monitoring method of an oil well.
Background
The water content of the crude oil is taken as an important parameter in the oil exploitation process, and the exploitation of the crude oil is influenced by accurately measuring the water content of the crude oil. For a production well, online real-time monitoring of the water content of crude oil has important significance for real-time understanding and mastering of the yield, the oil production position, prediction of the development life of an oil well, management of oil extraction automation and the like of a single well. For old wells, in the later period of exploitation, along with the reduction of reservoir pressure, the exploitation efficiency is obviously reduced, and water injection exploitation is mostly adopted in actual production. This more needs to carry out accurate measurement to the moisture content of output liquid to can in time master water injection and output situation in the pit, rationally guide subsequent exploitation. Therefore, the water content of the crude oil must be accurately measured in real time in the production process of the crude oil in the oil field.
In the process of monitoring the water content of the crude oil, fluids in three states of gas, oil and water do not exist in an oil pipe, and the influence of oil-in-water or water-in-oil dissolved in the oil and other substances such as minerals, hydrogen sulfide and paraffin is also avoided, so that the difficulty of accurately monitoring the water content of the crude oil is undoubtedly increased. At present, in the oil exploitation industry, the crude oil moisture content measurement mode which is generally used still carries out manual sampling and chemical examination at variable times, the precision of the measurement mode is relatively high, but the sampling and chemical examination time is long, the random sampling error is large, time and labor are wasted, the real-time property of data cannot be guaranteed, and the requirement of real-time online monitoring of oil field production cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem that the defects in the prior art are overcome, and provides a water content monitoring method based on a microwave three-probe oil well online water content monitor.
In order to solve the technical problems, the invention adopts the technical scheme that: the microwave-based three-probe online water content monitor for the oil well comprises a testing oil pipe arranged between an aboveground oil pipe and a wellhead connecting oil pipe, wherein the wellhead connecting oil pipe is communicated with an in-well oil pipe in the oil well, a water content monitoring instrument for testing the water content of extracted oil is arranged outside the testing oil pipe, an electronic circuit board is arranged in the water content monitoring instrument, a main controller and a communication module connected with the main controller are integrated on the electronic circuit board, a flow accumulating plate is arranged in the test oil pipe, the flow accumulating plate is provided with an inclined plane and an arc surface matched with the inner wall of the test oil pipe, one end, close to the oil pipe in the well, of the inclined plane of the flow accumulating plate is lower than one end, far away from the oil pipe in the well, of the inclined plane of the flow accumulating plate, and the height H of one end, far away from the oil pipe in the well, of the inclined plane of the flow accumulating plate is equal to the height H of the other.
R is the inner diameter of the test oil pipe, a flow sensor which extends into the test oil pipe and is used for detecting the liquid circulation in the oil pipe, a low-level microwave detection transmitter, a middle-level microwave detection transmitter and a high-level microwave detection transmitter which all transmit microwave beams are arranged at the right bottom of the length direction of the test oil pipe, a low-level microwave detection receiver which extends into the test oil pipe and is used for receiving the microwave beams transmitted by the low-level microwave detection transmitter and a low-level microwave detection receiver which is used for receiving the microwave beams transmitted by the middle-level microwave detection transmitter are arranged at the top of the length direction ofThe low-level microwave detection transmitter and the high-level microwave detection receiver form a group of low-level microwave probes, the middle-level microwave detection transmitter and the middle-level microwave detection receiver form a group of middle-level microwave probes, the high-level microwave detection transmitter and the high-level microwave detection receiver form a group of high-level microwave probes, the low-level microwave detection transmitter is positioned on one side, close to the oil pipe in the well, of the inclined surface of the flow accumulation plate, the flow sensor is positioned on one side, far away from the oil pipe in the well, of the inclined surface of the flow accumulation plate, the length of the low-level microwave detection transmitter extending into the test oil pipe is less than H, the length L of the middle-level microwave detection transmitter extending into the test oil pipe is greater than H and is the same as H
The high-level microwave detection emitter extends into the test oil pipe by the length of
One ends of the flow sensor, the low-level microwave detection emitter, the middle-level microwave detection emitter and the high-level microwave detection emitter, which are far away from the oil pipe, extend into the water content monitoring instrument and are connected with the main controller;
the method is characterized by comprising the following steps:
the method comprises the following steps of testing the flow rate in an oil pipe and monitoring: monitoring the liquid circulation condition in the test oil pipe by using a flow sensor which is arranged on the right bottom of the length direction of the test oil pipe and extends into the test oil pipe;
step two, judging whether the flow sensor acquires data: when the flow sensor acquires that liquid flows in the test oil pipe, the liquid flows out of the wellhead connection oil pipe, and at least one group of microwave probes in the low-position microwave probe, the middle-position microwave probe and the high-position microwave probe is effective in detecting data, and the third step is executed;
when the flow sensor does not acquire that liquid flows in the test oil pipe, the flow sensor indicates that no liquid flows out of the wellhead connection oil pipe, and the three groups of microwave probes, namely the low-level microwave probe, the middle-level microwave probe and the high-level microwave probe, are invalid in data detection;
step three, acquiring a water content value detected by the middle microwave probe: according to the formula
Calculating the dielectric constant epsilon of the mixture in the region between the middle microwave detection transmitter and the middle microwave detection receiver in the test oil pipe2Where c is the speed of light, s2For the distance between the intermediate microwave probe transmitter and the intermediate microwave probe receiver, Δ t2The difference value between the time of receiving the laser beam by the middle microwave detection receiver and the time of transmitting the laser beam by the middle microwave detection transmitter is represented by mu, which is magnetic conductivity;
according to the formula
Calculating the water content value gamma detected by the middle microwave probe2Wherein, epsilonyIs the dielectric constant, ε, of crude oilsThe dielectric constant of pure water;
step four, judging whether the water content data detected by the middle microwave probe is less than zero: water content value gamma detected by middle microwave probe2When the water content value is less than zero, the data detected by the low-level microwave probe in the oil pipe to be tested is effective, the low-level liquid flows in the oil pipe and the oil pipe to be tested connected at the wellhead, and the water content value detected by the low-level microwave probe at the moment
Wherein epsilon1Is a low liquid level dielectric constant and
s1for the distance, Δ t, between the low microwave probe transmitter and the low microwave probe receiver1The difference value between the time of receiving the laser beam by the low-level microwave detection receiver and the time of transmitting the laser beam by the low-level microwave detection transmitter is obtained;
water content value gamma detected by middle microwave probe2Not less thanWhen the time is zero, the liquid flows out of the wellhead connecting oil pipe, and at least two groups of microwave probes in the low-position microwave probe, the middle-position microwave probe and the high-position microwave probe are effective in data detection, and the fifth step is executed;
step five, acquiring a water content value detected by a high-order microwave probe: according to the formula
Calculating the dielectric constant epsilon of the mixture in the region between the high microwave detection transmitter and the high microwave detection receiver in the test oil pipe3Wherein s is3For the distance, Δ t, between the high microwave probe transmitter and the high microwave probe receiver3The difference value between the time of receiving the laser beam by the high-position microwave detection receiver and the time of transmitting the laser beam by the high-position microwave detection transmitter is obtained;
according to the formula
Calculating the water content value gamma detected by a high-level microwave probe3；
Step six, judging whether the water content data detected by the high-order microwave probe is less than zero: water content value gamma detected by high-level microwave probe3When the value is less than zero, the data detected by the low-level microwave probe and the middle-level microwave probe in the oil pipe to be tested is effective, and the well head is connected with the oil pipe and liquid level liquid flowing in the oil pipe to be tested;
water content value gamma detected by high-level microwave probe3When the liquid level is not less than zero, the liquid flows out of the wellhead connecting oil pipe, the data detected by three groups of microwave probes in the low-level microwave probe, the middle-level microwave probe and the high-level microwave probe are effective, and the high-level liquid flows through the wellhead connecting oil pipe and the testing oil pipe.
The moisture content monitoring method based on the microwave three-probe oil well online moisture content monitor is characterized by comprising the following steps of: the two ends of the testing oil pipe are respectively provided with a first testing oil pipe flange and a second testing oil pipe flange, the end part of the wellhead connecting oil pipe, which is far away from the oil well, is provided with a connecting oil pipe flange connected with the first testing oil pipe flange, and one end of the aboveground oil pipe, which is close to the testing oil pipe, is provided with an aboveground oil pipe flange connected with the second testing oil pipe flange.
The moisture content monitoring method based on the microwave three-probe oil well online moisture content monitor is characterized by comprising the following steps of: the main controller is an STM32F103 main controller, the communication module is a WIFI module, the WIFI module is a UART-WIFI module, and the UART-WIFI module is a UART-WIFI module of a model E103-W01.
The moisture content monitoring method based on the microwave three-probe oil well online moisture content monitor is characterized by comprising the following steps of: the WIFI module is communicated with the monitoring host through a wireless router, and the wireless router is connected with the monitoring host through a gigabit optical fiber.
The moisture content monitoring method based on the microwave three-probe oil well online moisture content monitor is characterized by comprising the following steps of: the WIFI module is communicated with a mobile terminal, and the mobile terminal is a mobile phone or a notebook computer.
The moisture content monitoring method based on the microwave three-probe oil well online moisture content monitor is characterized by comprising the following steps of: still install temperature sensor and the pressure sensor who stretches into to test in the oil pipe on test oil pipe length direction's the top, temperature sensor with pressure sensor keeps away from the one end of oil pipe and all stretches into in the moisture content monitoring instrument with main control unit connects.
The moisture content monitoring method based on the microwave three-probe oil well online moisture content monitor is characterized by comprising the following steps of: and a display screen connected with the main controller is arranged on the moisture content monitoring instrument.
The moisture content monitoring method based on the microwave three-probe oil well online moisture content monitor is characterized by comprising the following steps of: the height of the low-liquid-level liquid is greater than the height of the low-level microwave detection emitter extending into the test oil pipe, and is smaller than the height of the middle-level microwave detection emitter extending into the test oil pipe;
the height of the middle liquid level liquid is greater than the height of the middle microwave detection emitter extending into the test oil pipe, and is smaller than the height of the high microwave detection emitter extending into the test oil pipe;
the height of the high liquid level liquid is larger than the height of the high microwave detection emitter extending into the test oil pipe.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, the low-level microwave detection emitter, the middle-level microwave detection emitter and the high-level microwave detection emitter which all extend into the test oil pipe and have different extending lengths are arranged on the right bottom part of the length direction of the test oil pipe, and the microwave three-probe structure is designed to monitor the water content of the liquid in the oil pipe at different heights, so that the flowing state of the crude oil in the pipeline can be known, the measurement accuracy can be further ensured, and the device is convenient to popularize and use.
2. The invention installs a flow sensor for detecting the liquid circulation in the oil pipe in the test oil pipe, the flow sensor detects whether the liquid passes through the oil pipe, when the liquid passes through the oil pipe, the flow sensor can be used as a starting switch for driving the microwave detection emitter to work by the main controller, the microwave detector can detect the water content, the microwave detection emitter and the microwave detection receiver are prevented from working in real time, the energy consumption is reduced, meanwhile, the liquid is gathered in the test oil pipe by arranging the flow accumulation plate, the low-level microwave detection emitter is positioned at one side of the inclined plane of the flow accumulation plate close to the oil pipe in the well, the liquid reaches a certain height to facilitate the low-level probe to detect the data, the liquid in the oil pipe is detected by the flow sensor, when the flow sensor detects that the liquid passes through the oil pipe, the liquid in the well flows out and passes through the, reliable and stable, and good use effect.
3. The method adopted by the invention has simple steps, determines whether liquid passes through the oil pipe by judging whether the flow sensor collects the data or not, and the flow accumulating plate is arranged at the front side of the flow sensor, when the flow sensor detects the data, the liquid is accumulated to a certain height and flows over the flow accumulating plate, the continuous liquid circulation is realized, the accidental liquid circulation interference phenomenon is avoided, the effective quantity of the data detected by the microwave probe in the oil pipe connected with the wellhead is estimated by judging whether the water content data detected by the middle microwave probe is less than zero or not, the effective quantity of the data detected by the microwave probe in the oil pipe connected with the wellhead is finally determined by judging whether the water content data detected by the high microwave probe is less than zero or not, the measurement is not influenced by the fluid form and the state, and the measurement precision is not influenced by the water-in-oil or the oil-in-water state or the completely separated or, the measuring range is wider, the water content within the range of 0-100% is measured, and the device is convenient to popularize and use.
In conclusion, the invention has novel and reasonable design, the microwave three-probe structure is designed to monitor the water content of the liquid in different height levels in the oil pipe, the flowing state of the crude oil in the pipe can be known, the measurement accuracy can be further ensured, the liquid is gathered in the oil pipe to be tested by arranging the flow accumulation plate, the liquid reaches a certain height, the data can be conveniently detected by the low-level probe, the liquid in the oil pipe passes through the flow sensor, when the flow sensor detects that the liquid in the oil pipe passes through the flow accumulation plate, the liquid in the well flows out and passes through the flow accumulation plate, the invention is reliable and effective, and is convenient for popularization and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic view of the usage state of the monitor used in the present invention.
FIG. 2 is a schematic view showing the installation relationship of the probe, the flow accumulating plate, the flow sensor and the test oil pipe.
Fig. 3 is a left side view of fig. 2.
FIG. 4 is a block flow diagram of the method of the present invention.
Description of reference numerals:
1-oil well; 2-an in-well tubing; 3, the ground;
4, connecting an oil pipe at a wellhead; 5, tubing on the well; 6, testing the oil pipe;
7, connecting an oil pipe flange; 8, testing a first flange of the oil pipe; 9-testing the second flange of the oil pipe;
10-an aboveground oil pipe flange; 11-1-low microwave detection emitter;
11-2-a median microwave detection transmitter; 11-3-high microwave detection emitter;
12-a flow sensor; 13-low microwave detection receiver;
14-middle position microwave detection receiver; 15-high microwave detection receiver;
16-moisture content monitoring instrument; 17-a display screen; and 18-flow accumulating plate.
Detailed Description
As shown in fig. 1 to 4, the moisture content monitoring method of the microwave-based three-probe online oil well moisture content monitor of the present invention includes a testing oil pipe 6 installed between an oil pipe 5 above a ground 3 and a wellhead connecting oil pipe 4, the wellhead connecting oil pipe 4 is communicated with an oil pipe 2 in an oil well 1, a moisture content monitoring instrument 16 for testing moisture content of extracted oil is installed outside the testing oil pipe 6, an electronic circuit board is installed in the moisture content monitoring instrument 16, a main controller and a communication module connected with the main controller are integrated on the electronic circuit board, a current collecting plate 18 is installed in the testing oil pipe 6, the current collecting plate 18 has an inclined surface and an arc surface matched with an inner wall of the testing oil pipe 6, one end of the inclined surface of the current collecting plate 18 close to the oil pipe 2 in the well is lower than one end of the inclined surface of the current collecting plate 18 far from the oil pipe 2 in the well, the height H of the inclined surface of the flow accumulating plate 18 far away from one end of the oil pipe 2 in the well is
R is the inner diameter of the test oil pipe 6, a flow sensor 12 which extends into the test oil pipe 6 and is used for detecting the liquid circulation in the oil pipe, a low-level microwave detection emitter 11-1, a middle-level microwave detection emitter 11-2 and a high-level microwave detection emitter 11-3 which all emit microwave beams are arranged at the right bottom of the test oil pipe 6 in the length direction, a low-level microwave detection receiver 13 which extends into the test oil pipe 6 and is used for receiving the microwave beams emitted by the low-level microwave detection emitter 11-1, a middle-level microwave detection receiver 14 which is used for receiving the microwave beams emitted by the middle-level microwave detection emitter 11-2 and a high-level microwave detection receiver 14 which is used for receiving the microwave beams emitted by the middle-level microwave detectionThe high-order microwave detection receiver 15 of the microwave beam sent by the wave detection emitter 11-3, the low-order microwave detection emitter 11-1 and the low-order microwave detection receiver 13 form a group of low-order microwave probes, the middle-order microwave detection emitter 11-2 and the middle-order microwave detection receiver 14 form a group of middle-order microwave probes, the high-order microwave detection emitter 11-3 and the high-order microwave detection receiver 15 form a group of high-order microwave probes, the low-order microwave detection emitter 11-1 is located on one side, close to the oil pipe 2 in the well, of the inclined surface of the flow accumulating plate 18, the flow sensor 12 is located on one side, far away from the oil pipe 2 in the well, the length of the low-order microwave detection emitter 11-1 extending into the oil pipe 6 to be tested is smaller than H, and the length of the middle-order microwave detection emitter 11-2 extending into the oil pipe 6.
The high-level microwave detection emitter 11-3 extends into the test oil pipe 6 by the length of
One ends of the flow sensor 12, the low-level microwave detection emitter 11-1, the middle-level microwave detection emitter 11-2 and the high-level microwave detection emitter 11-3, which are far away from the oil pipe, extend into the water content monitoring instrument 16 and are connected with the main controller;
the method comprises the following steps:
the method comprises the following steps of testing the flow rate in an oil pipe and monitoring: monitoring the liquid circulation condition in the test oil pipe 6 by using a flow sensor 12 which is arranged on the right bottom of the test oil pipe 6 in the length direction and extends into the test oil pipe 6;
step two, judging whether the flow sensor acquires data: when the flow sensor 12 acquires that liquid flows in the test oil pipe 6, the liquid flows out of the wellhead connecting oil pipe 4, and at least one group of microwave probes in the low-position microwave probe, the middle-position microwave probe and the high-position microwave probe is effective in detecting data, and the third step is executed;
when the flow sensor 12 does not acquire that liquid flows in the test oil pipe 6, the flow sensor indicates that no liquid flows out of the wellhead connecting oil pipe 4, and meanwhile, three groups of microwave probes, namely the low-level microwave probe, the middle-level microwave probe and the high-level microwave probe, are invalid in data detection;
step three, acquiring a water content value detected by the middle microwave probe: according to the formula
Calculating the dielectric constant epsilon of the mixture in the region between the middle microwave detection transmitter 11-2 and the middle microwave detection receiver 14 in the test oil pipe 62Where c is the speed of light, s2For the distance, Δ t, between the median microwave detection transmitter 11-2 and the median microwave detection receiver 142The difference value between the time when the middle microwave detection receiver 14 receives the laser beam and the time when the middle microwave detection transmitter 11-2 transmits the laser beam is represented by mu, which is magnetic permeability;
according to the formula
Calculating the water content value gamma detected by the middle microwave probe2Wherein, epsilonyIs the dielectric constant, ε, of crude oilsThe dielectric constant of pure water;
step four, judging whether the water content data detected by the middle microwave probe is less than zero: water content value gamma detected by middle microwave probe2When the water content is less than zero, the data detected by only the low-level microwave probe in the test oil pipe 6 is effective, the low-level liquid flows in the wellhead connecting oil pipe 4 and the test oil pipe 6, and the water content value detected by the low-level microwave probe at the moment
Wherein epsilon1Is a low liquid level dielectric constant and
s1is the distance, Δ t, between the low microwave detection transmitter 11-1 and the low microwave detection receiver 131Is the difference between the time when the low microwave detection receiver 13 receives the laser beam and the time when the low microwave detection transmitter 11-1 transmits the laser beam;
when detected by a neutral microwave probeWater content value gamma2When the pressure is not less than zero, indicating that liquid flows out of the wellhead connecting oil pipe 4 and that at least two groups of microwave probes in the low-position microwave probe, the middle-position microwave probe and the high-position microwave probe are effective in data detection, and executing the step five;
step five, acquiring a water content value detected by a high-order microwave probe: according to the formula
Calculating the dielectric constant epsilon of the mixture in the region between the high microwave detection emitter 11-3 and the high microwave detection receiver 15 in the test oil pipe 63Wherein s is3Is the distance, Δ t, between the high microwave detection transmitter 11-3 and the high microwave detection receiver 153The difference value between the time when the high microwave detection receiver 15 receives the laser beam and the time when the high microwave detection transmitter 11-3 transmits the laser beam;
according to the formula
Calculating the water content value gamma detected by a high-level microwave probe3；
Step six, judging whether the water content data detected by the high-order microwave probe is less than zero: water content value gamma detected by high-level microwave probe3When the value is less than zero, the data detected by the low-level microwave probe and the middle-level microwave probe in the oil pipe 6 to be tested is effective, and the well head is connected with liquid level liquid flowing in the oil pipe 4 and the oil pipe 6 to be tested;
water content value gamma detected by high-level microwave probe3When the liquid level is not less than zero, the liquid flows out of the wellhead connecting oil pipe 4, the data detected by three groups of microwave probes in the low-level microwave probe, the middle-level microwave probe and the high-level microwave probe are effective, and the high-level liquid flows through the wellhead connecting oil pipe 4 and the testing oil pipe 6.
The dielectric constant ε of pure watersGreater than the dielectric constant epsilon of the crude oilyDielectric constant ε of crude oilyGreater than the dielectric constant of the gas, as water content value detected by a low level microwave probe, water content value detected by a medium level microwave probe or high level microwave probeWhen the water content value detected by the head is less than zero, the position in the pipeline is mostly gas, and the measured water content value is invalid at the moment.
In this embodiment, the height of the low-level liquid is greater than the height of the low-level microwave detection emitter 11-1 extending into the test oil pipe 6, and is less than the height of the middle-level microwave detection emitter 11-2 extending into the test oil pipe 6;
the height of the middle liquid level liquid is greater than the height of the middle microwave detection emitter 11-2 extending into the test oil pipe 6, and is smaller than the height of the high microwave detection emitter 11-3 extending into the test oil pipe 6;
the height of the high-level liquid is greater than the height of the high-level microwave detection emitter 11-3 extending into the test oil pipe 6.
It should be noted that, in the process of monitoring the water content of the crude oil, there are no fluids in three states of gas, oil and water in the oil pipe, and there are also influences of oil-in-water or water-in-oil dissolved in oil and other substances, such as minerals, hydrogen sulfide and paraffin, which all undoubtedly increase the difficulty of accurately monitoring the water content of the crude oil, by installing a low-level microwave detection emitter 11-1, a middle-level microwave detection emitter 11-2 and a high-level microwave detection emitter 11-3 which all extend into the test oil pipe 6 and have different lengths, on the right bottom of the test oil pipe 6 in the length direction, the gas in the oil pipe is lighter and will be on the upper layer of the pipe, the oil in a free state is lighter than water, below the gas, above the water, in turn downward are an emulsifying layer and water, a microwave three-probe structure is designed to monitor the water content of liquids in different height levels in the oil pipe, the flow state of the crude oil in the pipeline can be known, and the accuracy of measurement can be further ensured; the flow sensor 12 for detecting the liquid circulation in the oil pipe is arranged in the test oil pipe 6, the flow sensor 12 detects whether the liquid passes through the oil pipe, when the liquid passes through the oil pipe, the flow sensor can be used as a starting switch for driving the microwave detection emitter to work by a main controller, the microwave detector only detects the water content, the microwave detection emitter and the microwave detection receiver are prevented from being in a working state in real time, the energy consumption is reduced, meanwhile, the liquid is accumulated in the test oil pipe 6 by arranging the flow accumulation plate 18, the low-level microwave detection emitter 11-1 is positioned at one side, close to the oil pipe 2 in the well, of the inclined surface of the flow accumulation plate 18, the liquid reaches a certain height so that the low-level probe can detect data conveniently, the flow sensor 12 is used for detecting the liquid passage in the oil pipe, when the flow sensor 12 detects that the liquid passes through the oil pipe, reliable and effective, reliable and stable, and good use effect.
It should be noted that the operating principle of the microwave detection transmitter and the microwave detection receiver is as follows: the microwave detecting emitter emits microwave beam, and when the microwave beam passes through the water-containing substance, its amplitude, phase and propagation speed can be changed, and the physical quantities related to dielectric constant, such as power attenuation, phase change, resonant frequency and propagation speed, etc. when the microwave beam passes through the substance can be monitored and calculated, so that the water content of the substance can be indirectly monitored and calculated.
The height H of the inclined surface of the flow accumulating plate 18 away from the end of the well oil pipe 2 is
The length L of the middle position microwave detection emitter 11-2 extending into the test oil pipe 6 is greater than H and is
That is, the length of the middle position microwave detection emitter 11-2 extending into the test oil pipe 6 is greater than the height H of the end of the inclined surface of the flow integrating plate 18 far away from the oil pipe 2 in the well in real time, and the value of the height H of the end of the inclined surface of the flow integrating plate 18 far away from the oil pipe 2 in the well is taken as
In the process, the length L of the middle position microwave detection emitter 11-2 extending into the test oil pipe 6 is taken
Is greater than
Data of (2), not taking section
End point values.
In this embodiment, the both ends of test oil pipe 6 are provided with test oil pipe first flange 8 and test oil pipe second flange 9 respectively, the tip that well head connecting oil pipe 4 kept away from oil well 1 is provided with the connecting oil pipe flange 7 of being connected with test oil pipe first flange 8, the one end that well head oil pipe 5 is close to test oil pipe 6 is provided with the aboveground oil pipe flange 10 of being connected with test oil pipe second flange 9, gather the liquid that interior oil pipe 2 was taken out in the well in real time through setting up test oil pipe 6, test oil pipe 6 and well interior oil pipe 2, well head connecting oil pipe 4 and aboveground oil pipe 5 all communicate, the moisture content of monitoring liquid when guaranteeing the liquid circulation, and test oil pipe 6 realizes the sealing connection of connecting oil pipe 4 and aboveground oil pipe 5 with the well head through setting up test oil pipe first flange 8 and test oil pipe second flange 9, and is effectual.
In this embodiment, the main controller is an STM32F103 main controller, the communication module is a WIFI module, the WIFI module is a UART-WIFI module, and the UART-WIFI module is a UART-WIFI module of a model E103-W01.
In this embodiment, the WIFI module communicates with the monitoring host through the wireless router, and the wireless router is connected with the monitoring host through the gigabit optical fiber.
In this embodiment, the WIFI module communicates with a mobile terminal, and the mobile terminal is a mobile phone or a notebook computer.
In this embodiment, still install temperature sensor and the pressure sensor who stretches into to test oil pipe 6 on test oil pipe 6 length direction's the top, temperature sensor with pressure sensor 15 keeps away from the one end of oil pipe all stretch into to moisture content monitoring instrument 16 in with main control unit connects, utilizes temperature sensor and pressure sensor to gather current temperature and pressure data, and data compensation when the later stage is calculated the moisture content of being convenient for.
In this embodiment, the moisture content monitoring instrument 16 is provided with a display screen 17 connected with the main controller.
The method adopted by the invention has simple steps, whether liquid passes through the oil pipe is determined by judging whether the flow sensor 12 collects the data or not, the flow accumulating plate 18 is arranged at the front side of the flow sensor 12, when the flow sensor 12 detects the data, the liquid is accumulated to a certain height and flows over the flow accumulating plate 18, the continuous liquid circulation is realized, the accidental liquid circulation interference phenomenon is avoided, the effective quantity of the microwave probe detection data in the oil pipe 4 connected with the wellhead is estimated by judging whether the water content data detected by the middle-position microwave probe is less than zero or not, the effective quantity of the microwave probe detection data in the oil pipe 4 connected with the wellhead is finally determined by judging whether the water content data detected by the high-position microwave probe is less than zero or not, the measurement is not influenced by the fluid form and the state, and the measurement is not influenced by the water-in-oil or the oil-in-water state or the completely separated or, the measuring range is wider, and the measurement of the water content in the range of 0-100% is realized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (8)
1. Moisture content monitoring method based on microwave three-probe oil well online moisture content monitor, based on microwave three-probe oil well online moisture content monitor including install on ground (3) aboveground oil pipe (5) and well head connect test oil pipe (6) between oil pipe (4), well head connect oil pipe (4) and oil well (1) in well oil pipe (2) intercommunication, test oil pipe (6) install outward be used for testing moisture content monitoring instrument (16) of extract oil moisture content, be provided with the electronic circuit board in moisture content monitoring instrument (16), the last integration of electronic circuit board have main control unit and with the communication module that main control unit connects, be provided with in test oil pipe (6) and amalgamate flow board (18), amalgamate flow board (18) have an inclined plane and with test oil pipe (6) inner wall complex cambered surface, the one end that the inclined plane of amalgamate flow board (18) is close to in-well oil pipe (2) is less than the inclined plane of amalgamate flow board The height H of the end, away from the end of the oil pipe (2) in the well, of the inclined surface of the current collecting plate (18) far away from the end of the oil pipe (2) in the well is
R is the inner diameter of the test oil pipe (6), a flow sensor (12) which extends into the test oil pipe (6) and is used for detecting the liquid circulation in the oil pipe, a low-level microwave detection emitter (11-1), a middle-level microwave detection emitter (11-2) and a high-level microwave detection emitter (11-3) which all emit microwave beams are arranged at the right bottom of the test oil pipe (6), a low-level microwave detection receiver (13) which extends into the test oil pipe (6) and is used for receiving the microwave beams emitted by the low-level microwave detection emitter (11-1), a middle-level microwave detection receiver (14) which is used for receiving the microwave beams emitted by the middle-level microwave detection emitter (11-2) and a high-level microwave detection receiver (15) which is used for receiving the microwave beams emitted by the high-level microwave detection emitter (11-3) are arranged at the top of the test oil pipe (6), the low-level microwave detection transmitter (11-1) and the low-level microwave detection receiver (13) form a group of low-level microwave probes, the middle-level microwave detection transmitter (11-2) and the middle-level microwave detection receiver (14) form a group of middle-level microwave probes, the high-level microwave detection transmitter (11-3) and the high-level microwave detection receiver (15) form a group of high-level microwave probes, the low-level microwave detection transmitter (11-1) is located on one side, close to the oil pipe (2) in the well, of the inclined surface of the flow accumulation plate (18), the flow sensor (12) is located on one side, far away from the oil pipe (2) in the well, of the inclined surface of the flow accumulation plate (18), the length of the low-level microwave detection transmitter (11-1) extending into the test oil pipe (6) is smaller than H, and the length L of the middle-level microwave detection transmitter (11-2) extending into the test.
The length of the high-level microwave detection emitter (11-3) extending into the test oil pipe (6) is
One ends of the flow sensor (12), the low-level microwave detection emitter (11-1), the middle-level microwave detection emitter (11-2) and the high-level microwave detection emitter (11-3) far away from the oil pipe extend into the water content monitoring instrument (16) and are connected with the main controller;
the method is characterized by comprising the following steps:
the method comprises the following steps of testing the flow rate in an oil pipe and monitoring: monitoring the liquid circulation condition in the test oil pipe (6) by using a flow sensor (12) which is arranged on the right bottom of the test oil pipe (6) in the length direction and extends into the test oil pipe (6);
step two, judging whether the flow sensor acquires data: when the flow sensor (12) acquires that liquid flows in the test oil pipe (6), the liquid flows out of the wellhead connection oil pipe (4) and at least one group of microwave probes in the low-position microwave probe, the middle-position microwave probe and the high-position microwave probe is effective in detecting data, and the third step is executed;
when the flow sensor (12) does not acquire that liquid flows in the test oil pipe (6), the flow sensor indicates that no liquid flows out of the wellhead connecting oil pipe (4), and the detection data of the three groups of the low-level microwave probe, the middle-level microwave probe and the high-level microwave probe are invalid;
step three, acquiring a water content value detected by the middle microwave probe: according to the formula
Calculating the dielectric constant epsilon of the mixture in the region between the medium microwave detection transmitter (11-2) and the medium microwave detection receiver (14) in the test oil pipe (6)2Where c is the speed of light, s2For the distance between the medium microwave detection transmitter (11-2) and the medium microwave detection receiver (14), Δ t2The difference value between the time of receiving the laser beam by the middle microwave detection receiver (14) and the time of transmitting the laser beam by the middle microwave detection transmitter (11-2) is shown as mu, which is magnetic permeability;
according to the formula
Calculating the water content value gamma detected by the middle microwave probe2Wherein, epsilonyIs the dielectric constant, ε, of crude oilsThe dielectric constant of pure water;
step four, judging whether the water content data detected by the middle microwave probe is less than zero: water content value detected by middle microwave probeγ2When the water content is less than zero, the data detected by only the low-level microwave probe in the test oil pipe (6) is effective, the wellhead is connected with the oil pipe (4) and the test oil pipe (6) and low-level liquid flows through the wellhead, and the water content value detected by the low-level microwave probe at the moment
Wherein epsilon1Is a low liquid level dielectric constant and
s1is the distance between the low microwave detection transmitter (11-1) and the low microwave detection receiver (13), delta t1The difference value between the time when the low microwave detection receiver (13) receives the laser beam and the time when the low microwave detection transmitter (11-1) transmits the laser beam is obtained;
water content value gamma detected by middle microwave probe2When the pressure is not less than zero, indicating that liquid flows out of the wellhead connecting oil pipe (4) and at least two groups of microwave probes in the low-position microwave probe, the middle-position microwave probe and the high-position microwave probe are effective in data detection, and executing a fifth step;
step five, acquiring a water content value detected by a high-order microwave probe: according to the formula
Calculating the dielectric constant epsilon of the mixture in the region between the high microwave detection transmitter (11-3) and the high microwave detection receiver (15) in the test oil pipe (6)3Wherein s is3Is the distance between the high microwave detection transmitter (11-3) and the high microwave detection receiver (15), delta t3The difference value between the time of receiving the laser beam by the high microwave detection receiver (15) and the time of transmitting the laser beam by the high microwave detection transmitter (11-3);
according to the formula
Calculating the water content value gamma detected by a high-level microwave probe3；
Step six,Judging whether the water content data detected by the high-order microwave probe is less than zero: water content value gamma detected by high-level microwave probe3When the detection result is less than zero, the data detected by the low-level microwave probe and the middle-level microwave probe in the oil pipe (6) to be tested is valid, and the well head is connected with liquid level liquid flowing in the oil pipe (4) and the oil pipe (6) to be tested;
water content value gamma detected by high-level microwave probe3When the liquid level is not less than zero, the liquid flows out of the wellhead connecting oil pipe (4), the data detected by three groups of microwave probes in the low-position microwave probe, the middle-position microwave probe and the high-position microwave probe are effective, and the high-liquid-level liquid flows through the wellhead connecting oil pipe (4) and the testing oil pipe (6).
2. The moisture content monitoring method based on the microwave three-probe online moisture content monitor for the oil well as claimed in claim 1, wherein the moisture content monitoring method comprises the following steps: the oil well testing device is characterized in that a first testing oil pipe flange (8) and a second testing oil pipe flange (9) are respectively arranged at two ends of the testing oil pipe (6), a connecting oil pipe flange (7) connected with the first testing oil pipe flange (8) is arranged at the end part, far away from the oil well (1), of the well head connecting oil pipe (4), and an oil well pipe flange (10) connected with the second testing oil pipe flange (9) is arranged at one end, close to the testing oil pipe (6), of the oil well pipe (5).
3. The moisture content monitoring method based on the microwave three-probe online moisture content monitor for the oil well as claimed in claim 1, wherein the moisture content monitoring method comprises the following steps: the main controller is an STM32F103 main controller, the communication module is a WIFI module, the WIFI module is a UART-WIFI module, and the UART-WIFI module is a UART-WIFI module of a model E103-W01.
4. The moisture content monitoring method based on the microwave three-probe online moisture content monitor for the oil well as claimed in claim 3, wherein the moisture content monitoring method comprises the following steps: the WIFI module is communicated with the monitoring host through a wireless router, and the wireless router is connected with the monitoring host through a gigabit optical fiber.
5. The moisture content monitoring method based on the microwave three-probe online moisture content monitor for the oil well as claimed in claim 3, wherein the moisture content monitoring method comprises the following steps: the WIFI module is communicated with a mobile terminal, and the mobile terminal is a mobile phone or a notebook computer.
6. The moisture content monitoring method based on the microwave three-probe online moisture content monitor for the oil well as claimed in claim 1, wherein the moisture content monitoring method comprises the following steps: still install temperature sensor and the pressure sensor who stretches into in test oil pipe (6) on test oil pipe (6) length direction's the top, temperature sensor with pressure sensor (15) keep away from the one end of oil pipe and all stretch into in moisture content monitoring instrument (16) with main control unit connects.
7. The moisture content monitoring method based on the microwave three-probe online moisture content monitor for the oil well as claimed in claim 1, wherein the moisture content monitoring method comprises the following steps: and a display screen (17) connected with the main controller is arranged on the moisture content monitoring instrument (16).
8. The moisture content monitoring method based on the microwave three-probe online moisture content monitor for the oil well as claimed in claim 1, wherein the moisture content monitoring method comprises the following steps: the height of the low-level liquid is greater than the height of the low-level microwave detection emitter (11-1) extending into the test oil pipe (6), and is smaller than the height of the middle-level microwave detection emitter (11-2) extending into the test oil pipe (6);
the height of the middle liquid level liquid is greater than the height of the middle microwave detection emitter (11-2) extending into the test oil pipe (6), and is smaller than the height of the high microwave detection emitter (11-3) extending into the test oil pipe (6);
the height of the high-level liquid is greater than the height of the high-level microwave detection emitter (11-3) extending into the test oil pipe (6).
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