CN106018465A - Measuring device and method for thermal expansion coefficients of fluid in annular space of oil and gas well wellbore - Google Patents
Measuring device and method for thermal expansion coefficients of fluid in annular space of oil and gas well wellbore Download PDFInfo
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- CN106018465A CN106018465A CN201610458450.4A CN201610458450A CN106018465A CN 106018465 A CN106018465 A CN 106018465A CN 201610458450 A CN201610458450 A CN 201610458450A CN 106018465 A CN106018465 A CN 106018465A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/16—Investigating or analyzing materials by the use of thermal means by investigating thermal coefficient of expansion
Abstract
The invention relates to the field of oil and gas, in particular to a measuring device and method for thermal expansion coefficients of a fluid in an annular space of an oil and gas well wellbore. The bottom of a main body part of a testing device is connected with the bottom of an auxiliary part through a liquid pump and a precise liquid flow meter; a gas bottle and a gas storage tank are connected with the auxiliary part; a temperature and pressure measuring system, a display and acquisition system and a temperature control system are mounted on the main body part of the testing device. The measuring device and method for the thermal expansion coefficients of the fluid in the annular space of the oil and gas well wellbore have the characteristics of being high-temperature resistant, high-pressure resistant, corrosion resistant, simple in structure, easy to dismount and good in seal effect; the fluid is heated uniformly at a constant temperature, and the device and the method are applicable to the high-temperature-resistant fluid; the device is applicable to measurement of the thermal expansion coefficients of the fluid in the annular space of the oil and gas well wellbore, can easily and effectively measure the thermal expansion coefficients of the fluid in the annular space of the oil and gas well wellbore when the temperature change is larger and has higher testing accuracy.
Description
Technical field
The present invention relates to measurement apparatus and the measuring method in oil gas field, specially Oil/gas Well mineshaft annulus thermal expansion coefficient.
Background technology
In high temperature prolific oil and gas field recovery process, temperature in wellbore raises relatively big, causes thermal expansion in Oil/gas Well mineshaft annulus
Index variation is relatively big, thus affects annular pressure, on the one hand can cause the deformation of sleeve pipe and oil pipe, tubing even can be caused to damage；
Bring the most serious impact on the other hand can to sleeve pipe and the sealing of oil pipe and safety in production.In test and production process,
Owing to temperature significantly raises, make the thermal coefficient of expansion of liquid in annular space raise, thus the annular pressure caused rises, and can cause
The problem that ectonexine sleeve pipe resists intrinsic pressure/outer collapse resistance squeezing strength problem and oil pipe；Meanwhile, along with in Oil/gas Well mineshaft annulus
Pressure raises, and also can cause sleeve pipe bending and the phenomenon of upper top well head, even causes Oil/gas Well to reveal and damages, thus causing
Serious environmental pollution.Therefore, the research to Oil/gas Well mineshaft annulus thermal expansion coefficient is particularly important prominent.
Summary of the invention
The technical problem to be solved is to provide measurement apparatus and the measurement side of Oil/gas Well mineshaft annulus thermal expansion coefficient
Method.
For solving above-mentioned technical problem, the technical scheme is that
The measurement apparatus of Oil/gas Well mineshaft annulus thermal expansion coefficient, including test apparatus main body part, slave part, gas cylinder,
Air accumulator；Test apparatus main body section bottom is connected with bottom slave part by liquid pump, liquid precision effusion meter；Gas cylinder,
Air accumulator is connected with slave part respectively；Test apparatus main body part is provided with thermometric pressure measuring system, display and acquisition system and temperature
Degree control system.
Test apparatus main body part includes that corrosion-resistant sleeve pipe, the bottom of corrosion-resistant sleeve pipe have inlet, top seal and are provided with out
Liquid mouth；Inlet is connected with slave part by liquid precision effusion meter and liquid pump；Be provided with on liquid outlet measurement capillary tube and
Accurate gas flowmeter；In corrosion-resistant sleeve pipe, pressure transducer is installed；On corrosion-resistant cannula center axis, heating rod is installed,
Being also arranged multiple thermocouple group in corrosion-resistant sleeve pipe, each thermocouple group comprises two thermocouples, two heat of each thermocouple group
Galvanic couple is close on corrosion-resistant internal surface of sleeve pipe and heating rod respectively；Pressure transducer, thermocouple are connected with control device respectively.
Slave part includes degasification dissolving, and degasification dissolving top connects air inlet pipe and escape pipe, and leakage fluid dram is arranged at bottom；Enter
Trachea end extends to degasification dissolving inner bottom part, and air inlet pipe end is provided with multiple air inlet；Air inlet pipe top is air inlet,
Air inlet is connected with gas cylinder；Escape pipe top is gas outlet, and gas outlet is connected with air accumulator；Leakage fluid dram and test apparatus main body portion
The inlet divided connects.
Disposing in corrosion-resistant sleeve pipe and organize thermocouple more, thermocouple is respectively disposed on heating rod and corrosion-resistant internal surface of sleeve pipe, uses
The K-type thermocouple of a diameter of 0.2mm.Thermocouple is connected with thermometric pressure measuring system, display and acquisition system and temperature control system,
Collection data measured by nexine sleeve pipe by temperature control system in real time, and are connected with computer by communication interface.
At corrosion-resistant nexine inside pipe casing placement force sensor, it is used for detecting the thermal expansion stresses that temperature effects produces；And install
Measure capillary tube, measure the thermal volume expansion produced by temperature effects.
Dispose liquid precision effusion meter at the inlet of corrosion-resistant sleeve pipe, measure the liquid inlet volume of liquid.
Dispose accurate gas flowmeter on the measurement capillary tube of corrosion-resistant sleeve pipe, measure the gas output of gas.
The measuring method of this Oil/gas Well mineshaft annulus thermal expansion coefficient, process is:
First in the degasification dissolving of slave part, load testing liquid, reach deoxygenation or dissolving by being passed through different gas
The purpose of gas, pumps into liquid in corrosion-resistant sleeve pipe after 2h, allows the liquid level measuring capillary tube reach, at graduation mark, to open precision
Gas flowmeter and heater switch, when then at corrosion-resistant set overpressure, temperature and measurement capillary tube, liquid level is stablized,
Read temperature difference in the outlet of now gas and corrosion-resistant sleeve pipe, calculate the thermal coefficient of expansion of liquid at such a temperature.
Concrete process is:
The first step, Preparatory work of experiment:
Measure the internal diameter of capillary tube, corrosion-resistant internal surface of sleeve pipe and heating rod placed 15 groups of (often group 2) thermocouples,
Check thermocouple distribution situation and working condition, to guarantee that it is uniformly distributed and normally works；Pour the liquid prepared into degasification molten
Gas tank, utilizes silica gel sealing tank mouth, then is passed through required gas, be passed through more than 2h.
Second step, measures temperature and pressure, fluid expansion volume and the scale of construction of working off one's feeling vent one's spleen in corrosion-resistant sleeve pipe:
First by degasification dissolving, fluid pumps into corrosion-resistant sleeve pipe, liquid level reaches to measure at the graduation mark of capillary tube, reads essence
Close fluid flowmeter reading and the liquid level of measurement capillary tube, reset precision gas flowmeter, open heater switch, control
Heating-up temperature, when liquid level and corrosion-resistant set overpressure temperature value are stablized in capillary tube to be measured, reads temperature value now, survey
Liquid level and accurate gas output shown by gas flowmeter in amount capillary tube, such that it is able to calculate this gas in certain temperature
Thermal coefficient of expansion under the conditions of degree:
The gas output increased owing to liquid level rises:
The amount of liquid increased due to evaporation and volatilization:
Variation of liquid in whole experimentation: V=V4+V3
Liquid thermal expansion coefficient:
Calculating dissolubility α, wherein L is the height that liquid level rises, ρLFor the density of liquid, d is the internal diameter measuring capillary tube,
V is the variation of liquid in whole experimentation, V1It is the amount of liquid entering corrosion-resistant sleeve pipe, V2It is from measuring capillary tube out
Gas flow, V3It is the gas output increased owing to liquid level rises, V4It is the amount of liquid increased due to evaporation and volatilization, Δ T
It is the temperature change value after stablizing, MLIt it is fluid molecule amount.
3rd step, repeats second step, changes initial temperature condition, or is heated to different temperature, measures at multiple temperature
The thermal coefficient of expansion of fluid.
4th step, uses different fluid to test, calculates different fluid thermal coefficient of expansion with the degassed.
5th step, uses different fluid, gas to test, calculates the fluid thermal coefficient of expansion when being saturated gas with various.
6th step, experiment terminates, and records experimental result.By the fluid blowback degasification dissolving in corrosion-resistant sleeve pipe, clean device.
The measurement apparatus of the Oil/gas Well mineshaft annulus thermal expansion coefficient that the present invention provides and measuring method, have high temperature resistant, resistance to
High pressure, corrosion-resistant, simple in construction, be readily disassembled, the feature of good sealing effect.Temperature constant, fluid is used uniformly to heat,
It is suitable for high temperature resistant fluid.Using thermocouple, pressure transducer, delicate flow meter to gather data, accuracy is higher.This device
It is applicable to measure Oil/gas Well mineshaft annulus thermal expansion coefficient, the oil gas that can simple and effective measure when variations in temperature is bigger
Well shaft annular fluid thermal coefficient of expansion, and the accuracy of test is higher.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the test apparatus main body part of the present invention；
Fig. 3 is the slave part structural representation of the present invention.
Detailed description of the invention
The present invention is further described with detailed description of the invention below in conjunction with the accompanying drawings.
The measurement apparatus of Oil/gas Well mineshaft annulus thermal expansion coefficient, including test apparatus main body part 1, slave part 2, gas
Bottle 3, air accumulator 7；By liquid pump 8, liquid precision effusion meter 9 and slave part 2 end bottom test apparatus main body part 1
Portion connects；Gas cylinder 3, air accumulator 7 are connected with slave part 2 respectively；Test apparatus main body part 1 is provided with thermometric pressure measurement system
System 4, display and acquisition system 5 and temperature control system 6.
Test apparatus main body part 1 includes that corrosion-resistant sleeve pipe 12, the bottom of corrosion-resistant sleeve pipe 12 have inlet 10, and top seals
And liquid outlet 11 is installed；Inlet 10 is connected with slave part 2 by liquid precision effusion meter 9 and liquid pump 8；Go out liquid
Measurement capillary tube 16 and accurate gas flowmeter 17 are installed on mouth 11；In corrosion-resistant sleeve pipe 12, pressure transducer 15 is installed；
Heating rod 13 is installed on corrosion-resistant sleeve pipe 12 central shaft, in corrosion-resistant sleeve pipe 12, is also arranged multiple thermocouple group, each thermoelectricity
Even group comprises two thermocouples 14, and two thermocouples 14 of each thermocouple group are close to corrosion-resistant sleeve pipe 12 inwall respectively and add
On hot pin 13；Pressure transducer 15, thermocouple 14 are connected with control device respectively.
Slave part 2 includes degasification dissolving 18, and degasification dissolving 18 top connects air inlet pipe 19 and escape pipe 20, bottom
There is leakage fluid dram 24；Air inlet pipe 19 end extends to degasification dissolving 18 inner bottom part, and air inlet pipe 19 end is provided with multiple air inlet
Hole 21；Air inlet pipe 19 top is air inlet 22, and air inlet 22 is connected with gas cylinder 3；Escape pipe 20 top is gas outlet 23,
Gas outlet 23 is connected with air accumulator 7；Leakage fluid dram 24 is connected with the inlet 10 of test apparatus main body part 1.
Degasification dissolving 18 upper end piston connects, the junction silica gel sealing of piston；Realized by temperature control system 6
The temperature of tube fluid is controlled in real time, temperature, the test of pressure and collection by thermometric pressure measuring system 4 and display and are adopted
Collecting system 5 completes, and is connected with computer by RS232 communication interface.
Degasification, molten gas disposal is carried out by slave part 2 convection cell, such that it is able to each seed ginseng of working environment under simulation real well
Number change, probes into different mineshaft annulus fluid thermal coefficient of expansion after degasification or dissolving gas with various.For measuring each parameter value,
Can arrange corresponding sensor and connect display device sensor signal is shown be easy to observe and record, pressure is such as set
Force transducer 15 and thermocouple 14 are connected with display and acquisition system 5, respectively the detection nexine set pressure of tube fluid, temperature.
Until the Temperature Distribution of liquid and pressure reach stable after test, can get liquid according to the definition of liquid thermal expansion coefficient
Thermal coefficient of expansion.
By measuring liquid level lifting height, the available gas output increased owing to liquid level risesSuch that it is able to obtain
The amount of liquid increased due to evaporation and volatilizationFinally obtain the variation of liquid in whole experimentation
V=V4+V3
Liquid thermal expansion coefficient in fluid in the most corrosion-resistant sleeve pipe 12:
Thermal coefficient of expansion practical measuring examples normal-temperature distilled water deoxygenation after is given below.
The first step, Preparatory work of experiment:
The internal diameter measuring capillary tube is 0.006m, and the density of the fluid to be dissolved of corrosion-resistant set casing pack is 1.0g/L.
Second step, measures temperature and pressure, fluid expansion volume and the scale of construction of working off one's feeling vent one's spleen in corrosion-resistant sleeve pipe:
First by degasification dissolving, fluid pumps into corrosion-resistant sleeve pipe, liquid level reaches to measure at the graduation mark of capillary tube, precision liquid
Flowmeter body reading is 0.004m3, precision gas flowmeter is reset, opens heater switch, control heating-up temperature, hair to be measured
When in tubule, liquid level and corrosion-resistant set overpressure temperature value are stablized, temperature change value now is 80 DEG C, measures liquid in capillary tube
Face height change is 1.92m, and accurate gas output shown by gas flowmeter is 0.00006424m3, such that it is able to calculate
This gas thermal coefficient of expansion under certain temperature conditions:
The gas output increased owing to liquid level rises:
The amount of liquid increased due to evaporation and volatilization:
Variation of liquid in whole experimentation:
V=V4+V3=0.000007466+0.00005412=0.000061586m3；
Liquid thermal expansion coefficient:
Claims (5)
1. the measurement apparatus of Oil/gas Well mineshaft annulus thermal expansion coefficient, it is characterised in that: include test apparatus main body part (1),
Slave part (2), gas cylinder (3), air accumulator (7)；Test apparatus main body part (1) bottom by liquid pump (8),
Liquid precision effusion meter (9) is connected with slave part (2) bottom；Gas cylinder (3), air accumulator (7) respectively with slave part
(2) connect；Test apparatus main body part (1) is provided with thermometric pressure measuring system (4), display and acquisition system (5) and temperature
Degree control system (6).
The measurement apparatus of Oil/gas Well mineshaft annulus thermal expansion coefficient the most according to claim 1, it is characterised in that: institute
Test apparatus main body part (1) stated includes that corrosion-resistant sleeve pipe (12), the bottom of corrosion-resistant sleeve pipe (12) have inlet (10),
Top seals and is provided with liquid outlet (11)；Inlet (10) by liquid precision effusion meter (9) and liquid pump (8) and
Slave part (2) connects；Measurement capillary tube (16) and accurate gas flowmeter (17) are installed on liquid outlet (11)；Resistance to
In corrosion sleeve pipe (12), pressure transducer (15) is installed；Heating rod (13) is installed at corrosion-resistant sleeve pipe (12) central axis,
Being also arranged multiple thermocouple group in corrosion-resistant sleeve pipe (12), each thermocouple group comprises two thermocouples (14), each thermoelectricity
Two thermocouples (14) of even group are close on corrosion-resistant sleeve pipe (12) inwall and heating rod (13) respectively；Pressure transducer
(15), thermocouple (14) is connected with control device respectively.
The measurement apparatus of Oil/gas Well mineshaft annulus thermal expansion coefficient the most according to claim 2, it is characterised in that: institute
The slave part (2) stated includes degasification dissolving (18), and degasification dissolving (18) top connects to be had air inlet pipe (19) and go out
Trachea (20), leakage fluid dram (24) is arranged at bottom；Air inlet pipe (19) end extends to degasification dissolving (18) inner bottom part, enters
Trachea (19) end is provided with multiple air inlet (21)；Air inlet pipe (19) top is air inlet (22), air inlet (22)
It is connected with gas cylinder (3)；Escape pipe (20) top is gas outlet (23), and gas outlet (23) are connected with air accumulator (7)；
Leakage fluid dram (24) is connected with the inlet (10) of test apparatus main body part (1).
The measuring method of Oil/gas Well mineshaft annulus thermal expansion coefficient the most according to claim 3, it is characterised in that: first
First at degasification dissolving (18) the inner loading testing liquid of slave part (2), by be passed through different gas reach deoxygenation or
The purpose of dissolved gas, pumps into liquid after 2h in corrosion-resistant sleeve pipe (12), allows the liquid level measuring capillary tube (16) reach to carve
At degree line, open accurate gas flowmeter (17) and heater switch, then when pressure in corrosion-resistant sleeve pipe (12), temperature and
When measurement capillary tube (16) place liquid level is stablized, read outlet and corrosion-resistant sleeve pipe (12) the interior temperature difference of now gas,
Calculate the thermal coefficient of expansion of liquid at such a temperature.
The measuring method of Oil/gas Well mineshaft annulus thermal expansion coefficient the most according to claim 4, it is characterised in that: bag
Include following steps,
The first step, Preparatory work of experiment:
Measure the internal diameter measuring capillary tube (16), the upper placement of corrosion-resistant sleeve pipe (12) inwall and heating rod (13) 15 groups
Thermocouple, checks thermocouple distribution situation and working condition, to guarantee that it is uniformly distributed and normally works；The liquid prepared is fallen
Enter degasification dissolving (18), utilize silica gel sealing tank mouth, then be passed through required gas, be passed through no less than 2h；
Second step, measures corrosion-resistant sleeve pipe (12) interior temperature and pressure, fluid expansion volume and the scale of construction of working off one's feeling vent one's spleen:
First being pumped into by fluid in degasification dissolving (18) in corrosion-resistant sleeve pipe (12), liquid level reaches to measure capillary tube (16)
Graduation mark at, read the gas volume shown in accurate gas flowmeter (17) and measure the liquid level of capillary tube (16),
Precision gas flowmeter (17) is reset, opens heater switch, control heating-up temperature, liquid level in capillary tube to be measured (16)
And corrosion-resistant sleeve pipe (12) interior pressure temperature value is when stablizing, read temperature value now, to measure liquid level in capillary tube (16) high
Gas output shown by degree and accurate gas flowmeter (17), such that it is able to calculate this gas under certain temperature conditions
Thermal coefficient of expansion:
The gas output increased owing to liquid level rises:
The amount of liquid increased due to evaporation and volatilization:
Variation of liquid in whole experimentation: V=V4+V3
Liquid thermal expansion coefficient:
Calculating dissolubility α, wherein L is the height that liquid level rises, ρLFor the density of liquid, d is the internal diameter measuring capillary tube,
V is the variation of liquid in whole experimentation, V1It is the amount of liquid entering corrosion-resistant sleeve pipe (12), V2It is from measuring capillary
Pipe (16) gas flow out, V3It is the gas output increased owing to liquid level rises, V4Increase due to evaporation and volatilization
Amount of liquid, Δ T is the temperature change value after stablizing, MLIt it is fluid molecule amount；
3rd step, repeats second step, changes initial temperature condition, or is heated to different temperature, measures at multiple temperature
The thermal coefficient of expansion of fluid；
4th step, uses different fluid to test, calculates different fluid thermal coefficient of expansion with the degassed；
5th step, uses different fluid, gas to test, calculates the fluid thermal coefficient of expansion when being saturated gas with various；
6th step, experiment terminates, and records experimental result, by fluid blowback degasification dissolving (18) in corrosion-resistant sleeve pipe (12),
Clean device.
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| CN201610458450.4A CN106018465B (en) | 2016-06-22 | 2016-06-22 | The measuring device and measuring method of oil/gas well mineshaft annulus thermal expansion coefficient |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753917A (en) * | 2021-09-23 | 2021-12-07 | 福建瓮福蓝天氟化工有限公司 | High-purity sodium fluoride separation and purification device in silicate production |
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