CN105352564B - Viscous crude oil-water interfaces detection method and device - Google Patents

Viscous crude oil-water interfaces detection method and device Download PDF

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Publication number
CN105352564B
CN105352564B CN201510685092.6A CN201510685092A CN105352564B CN 105352564 B CN105352564 B CN 105352564B CN 201510685092 A CN201510685092 A CN 201510685092A CN 105352564 B CN105352564 B CN 105352564B
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China
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water
oil
viscous crude
heating rate
temperature
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CN105352564A (en
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张国英
刘奎江
张蔚
周代宏
张济智
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China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology Beijing CUMTB
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/22Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water

Abstract

The invention discloses a kind of viscous crude oil-water interfaces detection method, this method includes:The rate of heat transfer model of viscous crude and water is established respectively, and the heating rate ratio of viscous crude and water is calculated with this;Measure the heating rate of each position in oil water mixture respectively using platinum resistance temperature sensor;It is combined, the heating rate of viscous crude and water ratio so that it is determined that oil-water interfaces with the heating rate of each position measured.It, can be accurate in real time to obtain oil-water interfaces information under the premise of not destroying oil water mixture property by using method disclosed by the invention.

Description

Viscous crude oil-water interfaces detection method and device
Technical field
The present invention relates to oily water separation technique field more particularly to a kind of viscous crude oil-water interfaces detection method and device.
Background technology
Currently, in field of petroleum exploitation, water-oil separating is a very important link.What oil field at home generally used It is the method for gravity water-oil separating, that is, the crude oil produced obtains oil mixing with water after gas-liquid separation and solid impurity separation Object.Oil water mixture is sent into knockout drum, then adds high-efficiency activated dose, the medicaments such as demulsifier thereto, using heating profit It is detached with grease difference in specific gravity.In this process, key technology and difficult point are the detection technique of thick oil-water boundary. However, due to viscous crude oil water mixture large viscosity, strong adsorption, the accuracy of traditional oil-water interfaces detecting instrument, stability, can The actual needs of oil field production is all difficult to adapt to by property and cost.
Float-type interface detector is that specific density float is placed on oil-water interfaces, simple and practicable, there is certain precision. But for the viscous crude of large viscosity, float is easy to be bonded, and maintainability is very poor.Differential pressure type interface detector can be by detecting not It with the pressure of position to reflect the oil water mixture density of knockout drum different location, however finds in actual production, due to mine The influence of change degree, demulsifier, various polymer, oil and water density very close to, and oil density be also variation, it is difficult to Real-time compensation in instrument.
Invention content
The object of the present invention is to provide a kind of viscous crude oil-water interfaces detection method and device, can not destroy oil mixing with water It is accurate in real time to obtain oil-water interfaces information under the premise of physical property matter.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of viscous crude oil-water interfaces detection method, this method include:
The rate of heat transfer model of viscous crude and water is established respectively, and the heating rate ratio of viscous crude and water is calculated with this;
Measure the heating rate of each position in oil water mixture respectively using platinum resistance temperature sensor;
It is combined, the heating rate of viscous crude and water ratio so that it is determined that oily with the heating rate of each position measured Water termination.
The rate of heat transfer model for establishing viscous crude and water, and the heating rate ratio for calculating with this viscous crude and water includes:
Establish the heat conduction model of oil:
Wherein, QOil passesFor the heat flow of viscous crude, A is heat transfer area,For normal direction temperature gradient, λOilIt is viscous crude in temperature t DEG C when thermal coefficient;
Establish the thermal convection current model of oil:QOil is rightOil(Tw-T)A;
Wherein, QOil is rightFor the thermal convection current amount of viscous crude, αOilFor the heat transfer coefficient of viscous crude, TwFor sensor wall temperature, T is fluid temperature Degree;
Establish the heat conduction model of water:
Wherein, QWater passesFor the heat flow of water, A is heat transfer area,For normal direction temperature gradient, λWaterIt is water in t DEG C of temperature Thermal coefficient;
Establish the thermal convection current model of water:QWater pairWater(Tw-T)A;
Wherein, QWater pairFor the thermal convection current amount of water, αWaterFor the heat transfer coefficient of water, TwFor sensor wall temperature, T is fluid temperature (F.T.);
Calculate the heating rate ratio of viscous crude and water:
Wherein, ρWaterFor the density of water, cWaterFor the specific heat capacity of water, ρOilFor the density of viscous crude, cOilFor the specific heat capacity of viscous crude.
This method further includes:The platinum resistance temperature sensor, which is carried, using transmission device carries out high-precision motion;
The transmission device includes:High precision ball leading screw and motion controller;
The rotary motion of motor is changed into the up and down motion of sliding block by the ball-screw, carries platinum resistance temperature sensor It is moved back and forth in oil water mixture;
The motion controller, the movement velocity for accurately controlling ball-screw and period.
This method further includes:
Using the platinum resistance temperature sensor of device for cooling cooling movement back, the temperature difference is manufactured.
This method further includes:Oil water mixture is heated using constant temperature Fuel Tanking Unit, accelerates the formation of oil-water interfaces.
A kind of viscous crude oil-water interface detecting device, the device include:
Rate of heat transfer model foundation and heating rate are than computing module, the rate of heat transfer mould for establishing viscous crude and water respectively Type, and calculate with this heating rate ratio of viscous crude and water;
Data acquisition device, the heating rate for measuring each position in oil water mixture respectively comprising:Distribution Formula acquisition module and multiple platinum resistance temperature sensors for measuring oil water mixture heating rate connected to it;
Oil-water interfaces determining module is used for the heating rate of viscous crude and water ratio, the heating with each position measured Rate is combined, so that it is determined that oil-water interfaces.
The rate of heat transfer model for establishing viscous crude and water, and the heating rate ratio for calculating with this viscous crude and water includes:
Establish the heat conduction model of oil:
Wherein, QOil passesFor the heat flow of viscous crude, A is heat transfer area,For normal direction temperature gradient, λOilIt is viscous crude in temperature t DEG C when thermal coefficient;
Establish the thermal convection current model of oil:QOil is rightOil(Tw-T)A;
Wherein, QOil is rightFor the thermal convection current amount of viscous crude, αOilFor the heat transfer coefficient of viscous crude, TwFor sensor wall temperature, T is fluid temperature Degree;
Establish the heat conduction model of water:
Wherein, QWater passesFor the heat flow of water, A is heat transfer area,For normal direction temperature gradient, λWaterIt is water in t DEG C of temperature Thermal coefficient;
Establish the thermal convection current model of water:QWater pairWater(Tw-T)A;
Wherein, QWater pairFor the thermal convection current amount of water, αWaterFor the heat transfer coefficient of water, TwFor sensor wall temperature, T is fluid temperature (F.T.);
Calculate the heating rate ratio of viscous crude and water:
Wherein, ρWaterFor the density of water, cWaterFor the specific heat capacity of water, ρOilFor the density of viscous crude, cOilFor the specific heat capacity of viscous crude.
The device further includes:
Transmission device carries out high-precision motion for carrying the platinum resistance temperature sensor;
The transmission device includes:High precision ball leading screw and motion controller;
The ball-screw, the up and down motion for the rotary motion of motor to be changed into sliding block carry platinum resistance temperature Sensor moves back and forth in oil water mixture;
The motion controller, the movement velocity for accurately controlling ball-screw and period.
The device further includes:
Device for cooling manufactures the temperature difference for the platinum resistance temperature sensor of cooling movement back.
The device further includes:
Constant temperature Fuel Tanking Unit accelerates the formation of oil-water interfaces for heating oil water mixture.
As seen from the above technical solution provided by the invention, the program is not all base with the rate of heat transfer of viscous crude and water Plinth carries out immersion data acquisition using platinum resistance temperature sensor, significantly reduces the influence of viscous crude absorption, can be quickly accurate True finds oil-water interfaces.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this For the those of ordinary skill in field, without creative efforts, other are can also be obtained according to these attached drawings Attached drawing.
Fig. 1 provides a kind of flow chart of viscous crude oil-water interfaces detection method for the embodiment of the present invention;
Fig. 2 provides a kind of schematic diagram of viscous crude oil-water interface detecting device for the embodiment of the present invention.
Specific implementation mode
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete Ground describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts Example, belongs to protection scope of the present invention.
Embodiment
Fig. 1 provides a kind of flow chart of viscous crude oil-water interfaces detection method for the embodiment of the present invention.As shown in Figure 1, it is led Include the following steps:
Step 11, the rate of heat transfer model for establishing viscous crude and water respectively, and calculate with this heating rate of viscous crude and water Than.
The rate of heat transfer model of the viscous crude and water includes mainly:Oil, the heat conduction model of water and thermal convection current model.Its In, heat transfer abbreviation heat conduction, heat moves the height from object by the microscopic motion of interior of articles particle rather than micromixing Warm area is moved to low-temperature space.Thermal convection current caused heat transfer when being by the generation macroscopic motion of internal fluid particle, when solid wall There are when temperature difference between the fluid adjacent thereto of face, since fluid micellar displacement between wall surface and fluid as a result, just send out Heat exchange is given birth to.
Specifically:
The heat conduction model of oil can be described with Fourier law:
Wherein, QOil passesFor the heat flow of viscous crude, unit is W;A is heat transfer area, and unit is m2For normal direction temperature ladder Degree, unit are DEG C/m;λOilFor viscous crude in t DEG C of temperature thermal coefficient, unit W/ (m. DEG C).
The thermal convection current model of oil can be described by Newton's law of cooling:QOil is rightOil(Tw-T)A;
Wherein, QOil is rightFor the thermal convection current amount of viscous crude;αOilFor the heat transfer coefficient of viscous crude, unit W/ (m2.℃);TwFor sensor wall Temperature, T are fluid temperature (F.T.), usually take the fluid mean temperature on cross section.
Influence heat transfer coefficient α because being known as the viscosity, mu of fluid density ρ, fluid viscosity μ, fluid under wall temperaturew, specific heat capacity cp, thermal coefficient λ, the flow velocity u of forced convertion, bore d etc..Viscous crude is high viscosity fluid, heat transfer coefficient αOilIt is expressed as:
Similar, the heat conduction model of water can be established:
Wherein, QWater passesFor the heat flow of water, unit is W;A is heat transfer area, and unit is m2For normal direction temperature gradient, Unit is DEG C/m;λWaterFor water in t DEG C of temperature thermal coefficient, unit W/ (m. DEG C).
In identical environment, the physics value for substituting into water and viscous crude calculates, and the heat flow density of water is the hot-fluid of viscous crude at 70 DEG C 5.2467 times of density.A heat transfer areas are identical;Therefore, the heat flow Q of the heat transfer of waterWater passesIt is the heat flow Q of viscous crudeOil passes's 5.2467 again.
Establish the thermal convection current model of water:QWater pairWater(Tw-T)A;
Wherein, QWater pairFor the thermal convection current amount of water;αWaterFor the heat transfer coefficient of water, unit W/ (m2.℃);TwFor sensor wall temperature, T For fluid temperature (F.T.);
The heat transfer coefficient of water is expressed as:
The physical property numerical value of viscous crude and water is substituted into aforementioned α respectivelyOilWith αWaterExpression formula is calculated, and the heat transfer coefficient of water is thick 437.9199 times of oil;Therefore, the heat output Q of the thermal convection current of waterWater pairIt is the heat flow Q of viscous crudeOil is right437.9199 times.
The heating rate of viscous crude and water ratio:
Wherein, ρWaterFor the density of water, unit is g/cm3;cWaterFor the specific heat capacity of water, unit is J/ (kg. DEG C);ρOilFor viscous crude Density, unit is g/cm3;cOilFor the specific heat capacity of viscous crude, unit is J/ (kg. DEG C).
Step 12, the heating rate for measuring each position in oil water mixture respectively using platinum resistance temperature sensor.
The resistance value of metal platinum varies with temperature and changes, and will not cause physically or chemically to change because of high/low temperature, tool There are good reproducibility and stability, platinum resistance temperature sensor precision is high, and stability is good, is widely used in industrial thermometric.
The embodiment of the present invention measures the heating of each position in oil water mixture using platinum resistance temperature sensor respectively Rate.
Preferably, it carries the platinum resistance temperature sensor using transmission device and carries out high-precision motion;
The transmission device includes:High precision ball leading screw and motion controller;
The rotary motion of motor is changed into the up and down motion of sliding block by the ball-screw, carries platinum resistance temperature sensor It is moved back and forth in oil water mixture;
The motion controller, the movement velocity for accurately controlling ball-screw and period.
Preferably, the platinum resistance temperature sensor using device for cooling cooling movement back, manufactures the temperature difference.
Step 13, by the heating rate of viscous crude and water ratio, be combined with the heating rate of each position measured, to Determine oil-water interfaces.
Since the heating rate of platinum resistance temperature sensor in water is far longer than the heating rate in viscous crude, 11~step 12 of abovementioned steps is combined, it may be determined that oil-water interfaces.
Preferably, oil water mixture is heated using constant temperature Fuel Tanking Unit, accelerates the formation of oil-water interfaces.
Based on rate of heat transfer difference of the said program of the embodiment of the present invention by viscous crude with water, passed using platinum resistance temperature Sensor carries out immersion data acquisition, significantly reduces the influence of viscous crude absorption, can fast and accurately find oil-water interfaces.
On the other hand, the embodiment of the present invention also provides a kind of viscous crude oil-water interface detecting device, as shown in Fig. 2, the device Include mainly:
Rate of heat transfer model foundation and heating rate are than computing module, the rate of heat transfer mould for establishing viscous crude and water respectively Type, and calculate with this heating rate ratio of viscous crude and water;
Data acquisition device, the heating rate for measuring each position in oil water mixture respectively comprising:Distribution Formula acquisition module and multiple platinum resistance temperature sensors for measuring oil water mixture heating rate connected to it;
Oil-water interfaces determining module is used for the heating rate of viscous crude and water ratio, the heating with each position measured Rate is combined, so that it is determined that oil-water interfaces.
Further, the rate of heat transfer model for establishing viscous crude and water, and calculate with this heating speed of viscous crude and water Rate ratio includes:
Establish the heat conduction model of oil:
Wherein, QOil passesFor the heat flow of viscous crude, A is heat transfer area,For normal direction temperature gradient, λOilIt is viscous crude in temperature t DEG C when thermal coefficient;
Establish the thermal convection current model of oil:QOil is rightOil(Tw-T)A;
Wherein, QOil is rightFor the thermal convection current amount of viscous crude, αOilFor the heat transfer coefficient of viscous crude, TwFor sensor wall temperature, T is fluid temperature Degree;
Establish the heat conduction model of water:
Wherein, QWater passesFor the heat flow of water, A is heat transfer area,For normal direction temperature gradient, λWaterIt is water in t DEG C of temperature Thermal coefficient;
Establish the thermal convection current model of water:QWater pairWater(Tw-T)A;
Wherein, QWater pairFor the thermal convection current amount of water, αWaterFor the heat transfer coefficient of water, TwFor sensor wall temperature, T is fluid temperature (F.T.);
Calculate the heating rate ratio of viscous crude and water:
Further, which further includes:
Transmission device carries out high-precision motion for carrying the platinum resistance temperature sensor;
The transmission device includes:High precision ball leading screw and motion controller;
The ball-screw, the up and down motion for the rotary motion of motor to be changed into sliding block carry platinum resistance temperature Sensor moves back and forth in oil water mixture;
The motion controller, the movement velocity for accurately controlling ball-screw and period.
Further, which further includes:
Device for cooling manufactures the temperature difference for the platinum resistance temperature sensor of cooling movement back.
Further, which further includes:
Constant temperature Fuel Tanking Unit accelerates the formation of oil-water interfaces for heating oil water mixture.
It should be noted that the specific implementation of the functions implemented by the various functional modules for including in above-mentioned apparatus exists It has had a detailed description in each embodiment of front, therefore has repeated no more herein.
It is apparent to those skilled in the art that for convenience and simplicity of description, only with above-mentioned each function The division progress of module, can be as needed and by above-mentioned function distribution by different function moulds for example, in practical application Block is completed, i.e., the internal structure of device is divided into different function modules, to complete all or part of work(described above Energy.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can be readily occurred in, It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims Subject to enclosing.

Claims (8)

1. a kind of viscous crude oil-water interfaces detection method, which is characterized in that this method includes:
The rate of heat transfer model of viscous crude and water is established respectively, and the heating rate ratio of viscous crude and water is calculated with this;
Measure the heating rate of each position in oil water mixture respectively using platinum resistance temperature sensor;
It is combined, the heating rate of viscous crude and water ratio so that it is determined that grease circle with the heating rate of each position measured Face;
Wherein, the rate of heat transfer model for establishing viscous crude and water, and the heating rate ratio for calculating with this viscous crude and water includes:
Establish the heat conduction model of oil:
Wherein, QOil passesFor the heat flow of viscous crude, A is heat transfer area,For normal direction temperature gradient, λOilIt is led in t DEG C of temperature for viscous crude Hot coefficient;
Establish the thermal convection current model of oil:QOil is rightOil(Tw-T)A;
Wherein, QOil is rightFor the thermal convection current amount of viscous crude, αOilFor the heat transfer coefficient of viscous crude, TwFor sensor wall temperature, T is fluid temperature (F.T.);
Establish the heat conduction model of water:
Wherein, QWater passesFor the heat flow of water, A is heat transfer area,For normal direction temperature gradient, λWaterFor water in t DEG C of temperature heat conduction system Number;
Establish the thermal convection current model of water:QWater pairWater(Tw-T)A;
Wherein, QWater pairFor the thermal convection current amount of water, αWaterFor the heat transfer coefficient of water, TwFor sensor wall temperature, T is fluid temperature (F.T.);
Calculate the heating rate ratio of viscous crude and water:
Wherein, ρWaterFor the density of water, cWaterFor the specific heat capacity of water, ρOilFor the density of viscous crude, cOilFor the specific heat capacity of viscous crude.
2. according to the method described in claim 1, it is characterized in that, this method further includes:The platinum is carried using transmission device Resistance temperature sensor carries out high-precision motion;
The transmission device includes:High precision ball leading screw and motion controller;
The rotary motion of motor is changed into the up and down motion of sliding block by the ball-screw, and carrying platinum resistance temperature sensor is in oil It is moved back and forth in aqueous mixtures;
The motion controller, the movement velocity for accurately controlling ball-screw and period.
3. method according to claim 1 or 2, which is characterized in that this method further includes:
Using the platinum resistance temperature sensor of device for cooling cooling movement back, the temperature difference is manufactured.
4. according to the method described in claim 1, it is characterized in that, this method further includes:Oil is heated using constant temperature Fuel Tanking Unit Aqueous mixtures accelerate the formation of oil-water interfaces.
5. a kind of viscous crude oil-water interface detecting device, which is characterized in that the device includes:
Rate of heat transfer model foundation and heating rate are than computing module, the rate of heat transfer model for establishing viscous crude and water respectively, And the heating rate ratio of viscous crude and water is calculated with this;
Data acquisition device, the heating rate for measuring each position in oil water mixture respectively comprising:Distribution is adopted Collection module and multiple platinum resistance temperature sensors for measuring oil water mixture heating rate connected to it;
Oil-water interfaces determining module is used for the heating rate of viscous crude and water ratio, the heating rate with each position measured It is combined, so that it is determined that oil-water interfaces;
Wherein, the rate of heat transfer model for establishing viscous crude and water, and the heating rate ratio for calculating with this viscous crude and water includes:
Establish the heat conduction model of oil:
Wherein, QOil passesFor the heat flow of viscous crude, A is heat transfer area,For normal direction temperature gradient, λOilIt is viscous crude in t DEG C of temperature Thermal coefficient;
Establish the thermal convection current model of oil:QOil is rightOil(Tw-T)A;
Wherein, QOil is rightFor the thermal convection current amount of viscous crude, αOilFor the heat transfer coefficient of viscous crude, TwFor sensor wall temperature, T is fluid temperature (F.T.);
Establish the heat conduction model of water:
Wherein, QWater passesFor the heat flow of water, A is heat transfer area,For normal direction temperature gradient, λWaterFor water in t DEG C of temperature heat conduction system Number;
Establish the thermal convection current model of water:QWater pairWater(Tw-T)A;
Wherein, QWater pairFor the thermal convection current amount of water, αWaterFor the heat transfer coefficient of water, TwFor sensor wall temperature, T is fluid temperature (F.T.);
Calculate the heating rate ratio of viscous crude and water:
Wherein, ρWaterFor the density of water, cWaterFor the specific heat capacity of water, ρOilFor the density of viscous crude, cOilFor the specific heat capacity of viscous crude.
6. device according to claim 5, which is characterized in that the device further includes:
Transmission device carries out high-precision motion for carrying the platinum resistance temperature sensor;
The transmission device includes:High precision ball leading screw and motion controller;
The ball-screw, the up and down motion for the rotary motion of motor to be changed into sliding block, carrying platinum resistance temperature sensing Device moves back and forth in oil water mixture;
The motion controller, the movement velocity for accurately controlling ball-screw and period.
7. device according to claim 5 or 6, which is characterized in that the device further includes:
Device for cooling manufactures the temperature difference for the platinum resistance temperature sensor of cooling movement back.
8. device according to claim 5, which is characterized in that the device further includes:
Constant temperature Fuel Tanking Unit accelerates the formation of oil-water interfaces for heating oil water mixture.
CN201510685092.6A 2015-10-20 2015-10-20 Viscous crude oil-water interfaces detection method and device Expired - Fee Related CN105352564B (en)

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