CN112083149A - High-precision spiral-flow type crude oil water content measuring instrument - Google Patents
High-precision spiral-flow type crude oil water content measuring instrument Download PDFInfo
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- CN112083149A CN112083149A CN202011069066.8A CN202011069066A CN112083149A CN 112083149 A CN112083149 A CN 112083149A CN 202011069066 A CN202011069066 A CN 202011069066A CN 112083149 A CN112083149 A CN 112083149A
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- 239000010779 crude oil Substances 0.000 title claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 238000005192 partition Methods 0.000 claims abstract description 9
- 239000011148 porous material Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 25
- 238000000926 separation method Methods 0.000 description 11
- 239000003921 oil Substances 0.000 description 10
- 239000012530 fluid Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2835—Specific substances contained in the oils or fuels
- G01N33/2847—Water in oils
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/26—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring pressure differences
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/36—Analysing materials by measuring the density or specific gravity, e.g. determining quantity of moisture
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Abstract
The invention discloses a high-precision spiral-flow type crude oil water content measuring instrument, which comprises: the device comprises a cavity, an inlet pipe, a cyclone, an outlet pipe, a micro differential pressure sensor I and a micro differential pressure sensor II, wherein the cavity is divided into a left chamber and a right chamber by a partition plate, contrast liquid is injected into the left chamber, and crude oil miscible liquid to be detected is injected into the right chamber; the inlet pipe and the outlet pipe are respectively communicated with the upper end and the lower end of the right chamber, the swirler is connected with the right chamber and is used for separating gas phase in miscible liquid to be detected, the micro differential pressure sensor I is used for detecting that the liquid level of the right chamber reaches a specified height, and the micro differential pressure sensor II is used for measuring the pressure difference of the same liquid level of the two chambers. The high-precision spiral-flow type crude oil water content measuring instrument disclosed by the invention can effectively separate gas phase in crude oil, can be directly connected into a crude oil pipeline for use, is convenient to measure and high in efficiency, realizes high-precision measurement with lower measurement cost, and prolongs the average continuous non-fault working time of the instrument because the measuring port of the instrument is not in direct contact with the crude oil.
Description
Technical Field
The invention belongs to the field of crude oil monitoring, and particularly relates to a high-precision spiral-flow type crude oil water content measuring instrument.
Background
In the process of crude oil exploitation, the proportion of oil and water is an important parameter for representing an oil field reservoir, and is also an important basis for making and adjusting an oil field exploitation scheme and optimizing production parameters, and the accurate measurement of the water content of crude oil has important significance for prolonging the service life of an oil-gas well and improving the recovery ratio.
The existing instrument for measuring the water content of crude oil mainly measures the pressure difference between the crude oil and a contrast liquid at the same liquid level through a micro-pressure sensor, and then calculates the water content of the crude oil by combining water and the density of the crude oil according to the measured pressure difference. Because of the existence of multiphase flow gas phase of crude oil, the crude oil to be measured is mostly oil, gas and water mixed phase fluid, and gas-liquid separation must be carried out on the mixed phase fluid during measurement, therefore, the above-mentioned instrument needs to install a gas-liquid two-phase separation device at the front end of measurement, but because the separation device is bulky, the installation space requirement is high, the installation and debugging of the whole measurement system are complicated, the transportation is troublesome, and the manufacturing and use costs are extremely high.
In addition, the micro-pressure sensor measuring port in the crude oil water content measuring instrument is directly immersed in the crude oil, and in the heavy and high-viscosity measuring process, the micro-pressure sensor measuring port is easily blocked by easily solidified substances in the crude oil, so that the micro-pressure sensor cannot be normally used, the micro-differential pressure sensor needs to be continuously disassembled for cleaning, and the service life of the instrument is seriously shortened. The sensitivity of the micro-pressure sensor is extremely high, the existing instrument needs to keep the liquid level of crude oil static during measurement, the liquid inlet and outlet valves of the test cavity need to be closed simultaneously during measurement, and the measurement can be carried out only when the liquid level is static, so that the existing instrument can not measure the crude oil which flows continuously basically.
Therefore, there is a need for a crude oil water content measuring instrument, which can actively and effectively perform gas-liquid separation of crude oil to be measured, rapidly and accurately perform crude oil water content measurement, and prolong the average continuous non-failure working time of the instrument.
Disclosure of Invention
In view of the above, the invention is disclosed in the invention patents of the applicant: a high accuracy spiral-flow type crude oil moisture content measuring apparatu is proposed on ZL201711178331.4 and ZL 201410354161.0's the basis, and this instrument can carry out effectual gas-liquid separation, carries out crude oil moisture content measurement fast accurately.
In order to achieve the purpose, the invention adopts the following technical scheme: a high accuracy spiral-flow type crude oil moisture content measuring apparatu, the instrument includes:
the cavity comprises a left cavity and a right cavity, the two cavities are separated by a partition plate, and a convection port is reserved between the upper end of the partition plate and the top of the inner side of each cavity; a spherical orifice plate is arranged at the upper part of the right cavity of the cavity, and an orifice plate is arranged at the lower part of the right cavity of the cavity; the top and the bottom of the left cavity of the cavity are respectively provided with a liquid inlet and a liquid outlet;
an inlet pipe mounted on the top of the chamber and communicating with the right chamber;
the inlet end of the cyclone is communicated with the cavity right chamber, the interface of the right chamber connected with the cyclone is arranged at the position above the spherical orifice plate, and the outlet end of the cyclone is connected with the collecting pipe;
one end of the outlet pipe is communicated with the lower part of the right cavity of the cavity, the other end of the outlet pipe is connected with the collecting pipe, and an interface of the right cavity and the outlet pipe is arranged above the pore plate; the outlet pipe is provided with an electric ball valve;
the micro differential pressure sensor I is arranged at the upper part of the outer side of the cavity, one measuring port of the micro differential pressure sensor I is communicated with the left cavity of the cavity, and the other measuring port is connected to the top of the cavity through a communicating bent pipe and is communicated with the cavity; the measuring port of the micro differential pressure sensor I and the interface of the cavity are positioned below the spherical orifice plate;
the micro differential pressure sensor II is arranged at the lower end of the cavity, and two measuring ports of the micro differential pressure sensor II are respectively communicated with the left cavity and the right cavity of the cavity; the interfaces of the micro differential pressure sensor II and the cavity are positioned below the orifice plate, and the two interfaces are positioned at the equal height positions of the left chamber and the right chamber of the cavity.
Preferably, the upper surface of the spherical orifice plate is provided with a sharp raised structure.
Preferably, the cyclone comprises: the device comprises a tangent inlet pipe, an inverted cone-shaped cavity, an outlet pipe and an overflow pipe, wherein one end of the tangent inlet pipe is connected with the cavity right chamber, and the other end of the tangent inlet pipe is connected with the inverted cone-shaped cavity; one end of the outlet pipe is connected with a smaller port of the inverted cone-shaped cavity, and the other end of the outlet pipe is connected with the collecting pipe; one end of the overflow pipe is connected to the top of the inverted cone-shaped cavity, and the other end of the overflow pipe is connected with the outlet pipe.
Preferably, the inner wall of the inverted cone-shaped cavity is set to be an Archimedes spiral flow guide structure.
Preferably, the outlet pipe and the tangent inlet pipe are arranged in a mutually perpendicular mode.
The invention has the beneficial effects that: the invention discloses a high-precision spiral-flow type crude oil water content measuring instrument, which can realize effective gas-liquid separation of crude oil to be measured, can realize high-precision crude oil water content measurement without externally connecting gas-liquid separation equipment, is convenient and reliable to measure and reduces the equipment cost; the instrument adopts a mode of externally connecting a bent pipe to communicate a micro-pressure sensor measuring port with a sealed test cavity, so that the micro-pressure sensor measuring port is not in direct contact with crude oil, the problem that the micro-pressure sensor is easy to lose efficacy is solved, and the service life of equipment is prolonged; the spherical orifice plate is arranged in the instrument and has a buffering effect on the impact force of the inflowing crude oil, so that the liquid level of the measuring chamber is ensured to be relatively static, the crude oil inlet is not required to be closed for measurement, and the measuring efficiency is improved.
Drawings
FIG. 1 is a schematic view of an assembly structure of the high-precision spiral-flow type crude oil water content measuring instrument of the present invention;
FIG. 2 is an assembly plan view of the high-precision spiral-flow type crude oil water content measuring instrument of the present invention;
FIG. 3 is a partial cross-sectional view of the high-precision spiral-flow type crude oil water content measuring instrument of the present invention;
FIG. 4 is a schematic view of the assembly of a cyclone according to the invention;
in the figure: 1. the cavity 2, the inlet pipe 3, the cyclone 4, the outlet pipe 5, the micro differential pressure sensor I6, the micro differential pressure sensor II 7, the spherical orifice plate 8, the orifice plate 9, the electric ball valve 10, the collecting pipe 11, the communication elbow 12, the convection port 13, the partition plate 31, the tangent inlet pipe 32, the inverted cone cavity 33, the outlet pipe II 34 and the overflow pipe.
Detailed Description
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention and are to be construed as being without limitation to such specifically recited embodiments and examples. Those skilled in the art can make various other specific changes and combinations based on the teachings of the present invention without departing from the spirit of the invention, and these changes and combinations are within the scope of the invention.
The invention is described in detail below with reference to the figures and specific embodiments.
As shown in figure 1, the high-precision spiral-flow type crude oil water content measuring instrument comprises the following components:
the cavity 1 comprises a left cavity and a right cavity, as shown in fig. 3, the two cavities are separated by a partition plate 13, the height of the partition plate is lower than that of the cavities, so that a convection port 12 is reserved between the upper end of the partition plate 13 and the top of the inner side of the cavity to communicate the left cavity and the right cavity; a spherical orifice plate 7 is arranged at the upper part of the right chamber of the cavity 1, and an orifice plate 8 is arranged at the lower part; the top and the bottom of the left cavity of the cavity 1 are respectively provided with a liquid inlet and a liquid outlet. Before the measurement, contrast liquid is injected into to left cavity, and contrast liquid is the groundwater of the place where the oil of exploitation generally, during the measurement, constantly injects the crude oil mixed liquid that awaits measuring for right cavity, and spherical orifice plate 7 bellied surface that makes progress will fall to being close to zero from the crude oil velocity of flow that the inlet tube was injected into, and orifice plate 8 carries out the second deceleration to crude oil liquid, makes the liquid of right cavity be in relative stillness, avoids external pressure fluctuation to the influence of measurement to measured precision has been improved. Contrast is injected through the inlet of the left chamber and discharged through the outlet thereof after measurement.
The inlet pipe 2 is arranged at the top of the chamber 1 and is communicated with the right chamber, and the inlet pipe 2 is connected with a crude oil pipeline and is used for injecting oil, gas and water mixed phase crude oil fluid into the right chamber;
and the inlet end of the cyclone 3 is communicated with the right chamber of the cavity 1, and an interface of the right chamber connected with the cyclone 3 is arranged at a position above the spherical orifice plate 7. As shown in fig. 4, the cyclone 3 includes: a tangent inlet pipe 31, an inverted cone-shaped cavity 32, an outlet pipe II33 and an overflow pipe 34, wherein one end of the tangent inlet pipe 31 is connected with the right cavity of the cavity 1, and the other end is connected with the inverted cone-shaped cavity 32; one end of an outlet pipe II33 is connected with a smaller port of the inverted cone-shaped cavity 32, and the other end of the outlet pipe II33 is connected with the collecting pipe 10; overflow pipe 34 is connected to the top of inverted conical cavity 32 at one end and outlet pipe II33 at the other end. The cyclone 3 is mainly used for realizing gas-liquid separation of crude oil in the measuring process, wherein an Archimedes spiral flow guide structure is arranged in the inverted cone cavity 32, so that gas and a small amount of liquid entering the cyclone do circular motion, and the moving radius is gradually reduced, so that the speed of a medium entering the cyclone is increased, a downward suction force is formed, and the discharge of the gas is accelerated; the overflow pipe 34 is arranged at the top of the cyclone 3, so that light gas can be discharged from the overflow pipe 34, and the pressure of the cyclone 3 is lower than that of the cavity 1 during measurement by an instrument, so that the gas-liquid separation speed can be further accelerated.
One end of the outlet pipe 4 is communicated with the lower part of the right chamber of the cavity 1, the other end of the outlet pipe 4 is connected with the collecting pipe 10, and an interface between the right chamber and the outlet pipe 4 is arranged above the pore plate 8; and the outlet pipe 4 is provided with an electric ball valve 9, the outlet pipe 4 is used for discharging crude oil in the cavity 1, and the electric ball valve 9 controls the opening and closing of the outlet pipe opening 4.
A micro differential pressure sensor I5, a micro differential pressure sensor I5 is arranged at the upper part of the outer side of the cavity 1, one measuring port of the micro differential pressure sensor I5 is communicated with the left cavity of the cavity 1, and the other measuring port is connected to the top of the cavity 1 through a communicating bent pipe 11 and is communicated with the cavity 1; the measuring port of the micro differential pressure sensor I5 and the interface of the cavity 1 are positioned below the spherical orifice plate 7; the micro differential pressure sensor I5 is mainly used for monitoring the liquid level position of crude oil injected into the right chamber, and when the liquid level of the crude oil reaches a set value, the electric ball valve 9 is opened after the water content measuring instrument collects data of the micro differential pressure sensor II.
The micro differential pressure sensor II6 is characterized in that the micro differential pressure sensor II6 is arranged at the lower end of the cavity 1, and two measuring ports of the micro differential pressure sensor II6 are respectively communicated with the left cavity and the right cavity of the cavity 1; the micro differential pressure sensor II6 and the interface of the cavity 1 are positioned below the pore plate 14, the two interfaces are positioned at the equal height positions of the left cavity and the right cavity of the cavity 1, the micro differential pressure sensor II is mainly used for measuring the pressure difference of the two cavities in the cavity, and then the water content of the crude oil is calculated by utilizing the pressure difference and the comparison liquid density.
As shown in fig. 3, the upper surface of the spherical orifice plate 7 is provided with a structure with sharp protrusions, because the measuring instrument of the present invention automatically closes the electric ball valve 9 of the outlet pipe 4 during measurement, and the sectional area of the cavity 1 is larger than that of the inlet pipe 2, so that the pressure of the mixed phase fluid entering the cavity of the measuring instrument is reduced, the volume of the gas compressed in the mixed phase fluid is expanded, and at this time, the structure with sharp protrusions provided on the spherical orifice plate 7 pierces the unbroken gas bubbles, and the gas-liquid separation is accelerated.
As shown in FIG. 2, the outlet pipe 33 of the cyclone 3 and the tangential inlet pipe 31 are installed in a vertical posture to each other, so that the installation can make the whole instrument small in size.
The measuring process of the spiral-flow type crude oil water content measuring instrument disclosed by the invention is as follows: the inlet pipe 2 of the spiral-flow type crude oil water content measuring instrument disclosed by the invention is connected with an oil field oil way pipeline, and the collecting pipe 10 is also connected into the oil field oil way pipeline. During measurement, firstly, contrast liquid is injected through a liquid inlet on the left side of the cavity 1, and the liquid level value and the threshold value of the liquid injected into the right cavity are set in an instrument control system; and then closing the electric ball valve 9 of the outlet pipe 4 to enable the crude oil liquid level of the right chamber of the injection cavity 1 to rise, when the micro differential pressure sensor I5 detects that the liquid level of the right chamber reaches a set liquid level value, acquiring the numerical value of a micro differential pressure sensor II6 by a controller, opening the electric ball valve 9 to enable crude oil to be discharged smoothly, finally calculating the water content of the crude oil according to a pressure and density formula, and discharging gas and a small amount of liquid in the mixed phase fluid through a cyclone in the measurement process.
In summary, the high-precision spiral-flow type crude oil water content measuring instrument disclosed by the invention is connected with the cyclone, so that effective gas-liquid separation of crude oil to be measured can be realized without externally connecting gas-liquid separation equipment, further, the high-precision crude oil water content measurement is realized, the measurement is convenient and reliable, and the measurement cost is lower; the instrument adopts a mode of externally connecting a bent pipe to communicate a micro-pressure sensor measuring port with a sealed test cavity, so that the micro-pressure sensor measuring port is not in direct contact with crude oil, the problem that the micro-pressure sensor is easy to lose efficacy is solved, and the service life of equipment is prolonged; be provided with sphere orifice plate and orifice plate in this instrument, this orifice plate plays the cushioning effect to the impulsive force of the crude oil that flows in to guarantee to measure the liquid level of cavity static relatively, need not close the crude oil entry specially and wait that the liquid level just measures after static, improved measurement of efficiency.
Claims (5)
1. The utility model provides a high accuracy spiral-flow type crude oil moisture content measuring apparatu which characterized in that, the instrument includes:
the cavity body (1) comprises a left cavity body and a right cavity body, the two cavity bodies are separated by a partition plate (13), and a convection port (12) is reserved between the upper end of the partition plate (13) and the top of the inner side of each cavity body to enable the left cavity body and the right cavity body to be communicated; a spherical orifice plate (7) is arranged at the upper part of the right chamber of the cavity (1), and an orifice plate (8) is arranged at the lower part of the right chamber; the top and the bottom of the left chamber of the cavity (1) are respectively provided with a contrast liquid inlet and a contrast liquid outlet;
the inlet pipe (2), the inlet pipe (2) is installed on the top of the chamber (1) and is communicated with the right chamber;
the inlet end of the cyclone (3) is communicated with the right chamber of the cavity (1), the interface of the right chamber connected with the cyclone (3) is arranged at the position above the spherical orifice plate (7), and the outlet end of the cyclone (3) is connected with the collecting pipe (10);
one end of the outlet pipe (4) is communicated with the lower part of the right chamber of the cavity (1), the other end of the outlet pipe (4) is connected with the collecting pipe (10), and an interface between the right chamber and the outlet pipe (4) is arranged above the orifice plate (8); an electric ball valve (9) is arranged on the outlet pipe (4); the micro differential pressure sensor I (5) is arranged at the upper part of the outer side of the cavity (1), one measuring port of the micro differential pressure sensor I (5) is communicated with the left cavity of the cavity (1), and the other measuring port is connected to the top of the cavity (1) through a communicating bent pipe (11) and is communicated with the cavity (1); the measuring port of the micro differential pressure sensor I (5) and the interface of the cavity (1) are positioned above and below the spherical orifice plate (8);
the micro differential pressure sensor II (6) is arranged at the lower end of the cavity (1), and two measuring ports of the micro differential pressure sensor II (6) are respectively communicated with the left cavity and the right cavity of the cavity (1); the interfaces of the micro differential pressure sensor II (6) and the cavity (1) are positioned below the pore plate (14), and the two interfaces are positioned at the positions of the left cavity and the right cavity of the cavity (1) with equal height.
2. The high-precision spiral-flow type crude oil water content measuring instrument as claimed in claim 1, wherein the spherical orifice plate (7) is provided with a sharp convex structure on the upper surface.
3. The high-precision spiral-flow type crude oil water content measuring instrument according to claim 2, wherein the cyclone (3) comprises: the device comprises a tangent inlet pipe (31), an inverted cone-shaped cavity (32), an outlet pipe II (33) and an overflow pipe (34), wherein one end of the tangent inlet pipe (31) is connected with the right cavity of the cavity (1), and the other end of the tangent inlet pipe is connected with the inverted cone-shaped cavity (32); one end of the outlet pipe II (33) is connected with a smaller port of the inverted cone-shaped cavity (32), and the other end of the outlet pipe II is connected with the collecting pipe (10); one end of the overflow pipe (34) is connected to the top of the inverted cone-shaped cavity (32), and the other end of the overflow pipe is connected with the outlet pipe II (33).
4. The high-precision spiral-flow type crude oil water content measuring instrument as claimed in claim 3, wherein the inner wall of the inverted cone-shaped cavity (32) is provided with an Archimedes spiral flow guide structure.
5. The high-precision spiral-flow type crude oil water content measuring instrument according to claim 4, wherein the outlet pipe (33) and the tangential inlet pipe (31) are installed in a mutually perpendicular posture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011069066.8A CN112083149A (en) | 2020-09-30 | 2020-09-30 | High-precision spiral-flow type crude oil water content measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011069066.8A CN112083149A (en) | 2020-09-30 | 2020-09-30 | High-precision spiral-flow type crude oil water content measuring instrument |
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| CN112083149A true CN112083149A (en) | 2020-12-15 |
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| CN202011069066.8A Pending CN112083149A (en) | 2020-09-30 | 2020-09-30 | High-precision spiral-flow type crude oil water content measuring instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504915A (en) * | 2020-11-02 | 2021-03-16 | 长江大学 | Intelligent measuring device for water content of crude oil |
| CN113567297A (en) * | 2021-07-23 | 2021-10-29 | 四川速荣科技有限公司 | High-precision crude oil water content measuring instrument |
-
2020
- 2020-09-30 CN CN202011069066.8A patent/CN112083149A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112504915A (en) * | 2020-11-02 | 2021-03-16 | 长江大学 | Intelligent measuring device for water content of crude oil |
| CN113567297A (en) * | 2021-07-23 | 2021-10-29 | 四川速荣科技有限公司 | High-precision crude oil water content measuring instrument |
| CN113567297B (en) * | 2021-07-23 | 2023-06-27 | 四川速荣科技有限公司 | High-precision crude oil water content measuring instrument |
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