CN110196264A - A kind of high temperature and pressure condensation air elutriation wax amount test device and method - Google Patents
A kind of high temperature and pressure condensation air elutriation wax amount test device and method Download PDFInfo
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- CN110196264A CN110196264A CN201910487077.9A CN201910487077A CN110196264A CN 110196264 A CN110196264 A CN 110196264A CN 201910487077 A CN201910487077 A CN 201910487077A CN 110196264 A CN110196264 A CN 110196264A
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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
- G01N25/02—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering
- G01N25/12—Investigating or analyzing materials by the use of thermal means by investigating changes of state or changes of phase; by investigating sintering of critical point; of other phase change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
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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
Abstract
The present invention discloses a kind of high temperature and pressure condensation air elutriation wax amount test device and method, including insulating box I, insulating box II, phase transition under high pressure test gas cylinder, vacuum pump, constant speed and constant pressure pump, intermediate receptacle, pipeline；The vacuum pump, phase transition under high pressure test gas cylinder, intermediate receptacle, constant speed and constant pressure pump pass sequentially through pipeline connection；Phase transition under high pressure test gas cylinder both ends are respectively equipped with motor-driven valve I, motor-driven valve II, and the intermediate receptacle both ends are respectively equipped with motor-driven valve III, motor-driven valve IV；The intermediate receptacle is equipped with temperature sensor II, pressure sensor II, and the temperature sensor II, pressure sensor II are respectively positioned on outside insulating box II.The present invention is based on the equations of gas state and mass conservation law, it is proposed that test condensation gas is tested by falling temperature method analyses wax amount, research achievement will be helpful to as further deeply understanding gas condensate reservoir analyses wax rule and settlement law, foundation is provided for stratum or pit shaft wax control paraffin removal measure, to improve production of hydrocarbons efficiency.
Description
Technical field
The present invention relates to a kind of high temperature and pressure condensation air elutriation wax amount test device and methods.
Background technique
Paraffin deposit problem is always production of hydrocarbons and the serious problem that transport faces, either in oil-gas reservoir reservoir, well
Wax deposit phenomenon can all occur in cylinder and surface gathering and transferring pipeline etc..The deposition of wax will cause pit shaft blocking in pit shaft, lead to oil gas
Yield is greatly reduced, or even stops production.Pit shaft wax deposit is serious, causes live Paraffin Removal operation frequent, seriously affects the flat of production
Steady operation, is greatly improved oil-gas reservoir cost of winning.In recent years, China is western and eastern region, especially in Tarim Basin,
High-content wax condensate gas well wax deposit problem is more and more common, has seriously affected the normal production of gas well.
Currently, the theory that deposition is precipitated for paraffin is concentrated mainly on sing-phase crude oil with experimental study, for analysis wax amount
Test mainly include differential scanning calorimetry (DSC), Fourier transform infrared spectrometry (FT-IR), and be separated by filtration with from
Centrifugal separation etc..There has been no for the test method for analysing wax amount in high temperature and pressure condensation gas at present.
Summary of the invention
The present invention mainly overcomes shortcoming in the prior art, proposes that a kind of high temperature and pressure condensation air elutriation wax measures examination
Device and method.
The present invention solves technical solution provided by above-mentioned technical problem: a kind of high temperature and pressure condensation air elutriation wax measurement examination
Device, including insulating box I, insulating box II, phase transition under high pressure test gas cylinder, vacuum pump, constant speed and constant pressure pump, intermediate receptacle, pipeline；
The vacuum pump, phase transition under high pressure test gas cylinder, intermediate receptacle, constant speed and constant pressure pump pass sequentially through pipeline connection；
Phase transition under high pressure test gas cylinder both ends are respectively equipped with motor-driven valve I, motor-driven valve II, the intermediate receptacle both ends difference
Equipped with motor-driven valve III, motor-driven valve IV；
The phase transition under high pressure test gas cylinder, motor-driven valve I, motor-driven valve II are arranged in insulating box I, the intermediate receptacle,
Motor-driven valve III, motor-driven valve IV are arranged in insulating box II；
The phase transition under high pressure test gas cylinder is equipped with temperature sensor I, pressure sensor I, the temperature sensor I, pressure
Force snesor I is respectively positioned on outside insulating box I；
The intermediate receptacle is equipped with temperature sensor II, pressure sensor II, the temperature sensor II, pressure sensing
Device II is respectively positioned on outside insulating box II.
It is further to be all made of metal between the pipeline and phase transition under high pressure test gas cylinder, intermediate receptacle to technical solution
Sealing.
It is further the temperature sensor I, pressure sensor I, temperature sensor II, pressure sensing to technical solution
The precision of device II is at least up to 0.01 grade.
It is further that the motor-driven valve I, motor-driven valve II, motor-driven valve III, motor-driven valve IV are high temperature resistant height to technical solution
Motor-driven valve is pressed, and aperture is controllable, realizes fine tuning.
Further that the test device further includes computer to technical solution, the computer respectively with insulating box I, insulating box
II, temperature sensor I, pressure sensor I, temperature sensor II, pressure sensor II are electrically connected.
It is further that thermal insulation board is equipped between the insulating box I, insulating box II to technical solution.
A kind of high temperature and pressure condensation air elutriation wax weight testing method, comprising the following steps:
Step S1, cleaning equipment and pipeline, connect experimental provision, with alcohol, petroleum ether cleaning experiment system；
Step S2, ground laminar flow sample is prepared, content of wax condensation gas is filled in intermediate receptacle (6), and be maintained at stratum temperature and pressure
Under the conditions of；
Step S3, motor-driven valve I (7), motor-driven valve II (8) are opened, are closed motor-driven valve III (9), using vacuum pump (4) by high pressure
Phase transformation test gas cylinder (3) and pipeline are evacuated, and are then shut off motor-driven valve I (7), motor-driven valve II (8)；
Step S4, insulating box I (1) computer heating control to setting high temperature T0, insulating box II (2), which should be heated above, sets high temperature T0,
And keep stable；
Step S5: open motor-driven valve I (7), motor-driven valve III (9), motor-driven valve IV (10), using constant speed and constant pressure pump (5) will in
Between content of wax condensation gas in container (6) under the Isobarically Control fine tuning of motor-driven valve III (9), be slowly injected into phase transition under high pressure test
Gas cylinder (3) reaches setting high pressure P0And stablize, it is then shut off motor-driven valve I (7), motor-driven valve III (9)；
Step S6: control insulating box II (2) temperature remain unchanged, insulating box I (1) from setting high temperature T0Start automatic cooling
And stablize, computer acquires different moments tiPhase transition under high pressure tests the pressure and temperature in gas cylinder (3)；
Step S7: when insulating box I (1) temperature drops to the lower limit temperature of setting, stopping cooling recording pressure and temperature at this time
Degree, and test and measure wax molecular weight Ms；
Step S8, setting high temperature T is calculated0, setting high pressure P0, initial time t0Under the conditions of, phase transition under high pressure tests gas cylinder (3)
The initial tolerance N of middle content of wax condensate gas0, wherein deviation factors Z0It is solved by equation of gas state method；
In formula: T0To set high temperature；P0To set high pressure；V0Gas cylinder volume is tested for phase transition under high pressure；Z0For initial time gas
Body deviation factors；R is Avgadro constant；
Step S9, t is calculatediMoment phase transition under high pressure tests the gas phase content N in gas cylinder (3)i；
In formula: TiFor tiThe temperature at moment；PiFor tiThe pressure at moment；ViFor tiMoment phase transition under high pressure tests gas in gas cylinder
Volume；ZiFor tiMoment deviation factor for gas；R is Avgadro constant；
Step S10, t is calculatediMoment phase transition under high pressure tests the precipitation wax amount in gas cylinder (3)
In formula: T0To set high temperature；P0To set high pressure；V0Gas cylinder volume is tested for phase transition under high pressure；Z0For initial time gas
Body deviation factors；TiFor tiThe temperature at moment；PiFor tiThe pressure at moment；ViFor tiMoment phase transition under high pressure is tested gas in gas cylinder and is held
Product；ZiFor tiMoment deviation factor for gas；R is Avgadro constant；
Step S11, wax precipitation point is obtained, and to initial toleranceIt is modified；
In formula:To correct initial tolerance；S is the number of test points before wax precipitation point occurs；NiFor tiMoment phase transition under high pressure is surveyed
Gas phase content in gas testing bottle；
Step S12, to tiMoment phase transition under high pressure tests the precipitation wax amount in gas cylinder (3)It is modified；
In formula:For revised precipitation wax amount；ρgiFor the molar density of gas；ρsTo indicate that the mole close of wax is precipitated
Degree；TiFor tiThe temperature at moment；PiFor tiThe pressure at moment；ZiFor tiMoment deviation factor for gas；
Step S13, according to wax molecular weight M obtained abovesWith revised precipitation wax amountCalculate analysis wax amount ms；
In formula: msTo analyse wax amount；MsFor wax molecular weight；For revised precipitation wax amount.
It is further the setting high temperature T to technical solution0For prime stratum temperature, high pressure P is set0To be primitively laminated
Power.
It is further that the temperature in the step 4 in insulating box II (2) is higher than the temperature of insulating box I (1) to technical solution
30℃。
It is further to be cooled down in the step S6 with 2 DEG C of the temperature difference to technical solution.
The invention has the following advantages that proposition passes through cooling the present invention is based on the equation of gas state and mass conservation law
Method experiment test condensation gas analyse wax amount, research achievement will be helpful to for further deeply understanding gas condensate reservoir analyse wax rule and
Settlement law provides foundation for stratum or pit shaft wax control paraffin removal measure, to improve production of hydrocarbons efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of experimental provision of the present invention；
Fig. 2 is experiment one group of condensation air elutriation wax amount data processed result figure of test.
Specific embodiment
Further description is done to the present invention below with reference to embodiment and attached drawing.
As shown in Figure 1, a kind of high temperature and pressure condensation air elutriation wax amount test device of the invention, including insulating box I 1, constant temperature
Case II 2, phase transition under high pressure test gas cylinder 3, vacuum pump 4, constant speed and constant pressure pump 5, intermediate receptacle 6, computer, pipeline；The insulating box I 1,
Thermal insulation board 15 is equipped between insulating box II 2；The vacuum pump 4, phase transition under high pressure test gas cylinder 3, intermediate receptacle 6, constant speed and constant pressure pump 5
Pass sequentially through pipeline connection；It wherein is all made of metal sealing between pipeline and phase transition under high pressure test gas cylinder 3, intermediate receptacle 6, is avoided
Rubber seal, which generates deformation, leads to pressure or volume change, causes experiment test error；
The phase transition under high pressure test 3 both ends of gas cylinder are respectively equipped with motor-driven valve I 7, motor-driven valve II 8,6 both ends of intermediate receptacle
It is respectively equipped with motor-driven valve III 9, motor-driven valve IV 10；
To avoid temperature interference factor from influencing, the phase transition under high pressure test gas cylinder 3, motor-driven valve I 7, motor-driven valve II 8 are respectively provided with
In insulating box I 1, the intermediate receptacle 6, motor-driven valve III 9, motor-driven valve IV 10 are arranged in insulating box II 2；And motor-driven valve
I 7 are also all put into insulating box to the pipeline of motor-driven valve III 9；And the phase transition under high pressure test gas cylinder 3 is equipped with temperature sensor
I 11, pressure sensor I 12, the temperature sensor I 11, pressure sensor I 12 are respectively positioned on outside insulating box I 1；The intermediate appearance
Device 6 is equipped with temperature sensor II 13, pressure sensor II 14, the temperature sensor II 13, the equal position of pressure sensor II 14
In outside insulating box II 2；
The computer respectively with insulating box I 1, insulating box II 2, temperature sensor I 11, pressure sensor I 12, temperature sensing
Device II 13, pressure sensor II 14 are electrically connected；Data can be collected on computer.
Wherein in order to further avoid experiment test error, preferred embodiment is, the temperature sensor I 11,
Pressure sensor I 12, temperature sensor II 13, pressure sensor II 14 precision be at least up to 0.01 grade, the motor-driven valve I 7,
Motor-driven valve II 8, motor-driven valve III 9, motor-driven valve IV 10 are high temperature high voltage resistant motor-driven valve, and aperture is controllable, realize fine tuning.
The experimental procedure of this experimental provision is as follows:
Step S1, cleaning equipment and pipeline, connect experimental provision, with alcohol, petroleum ether cleaning experiment system；
Step S2, ground laminar flow sample is prepared, content of wax condensation gas is filled in intermediate receptacle 6, and be maintained at stratum temperature and pressure item
Under part；
Step S3, motor-driven valve I 7, motor-driven valve II 8 are opened, motor-driven valve III 9 is closed, is tested phase transition under high pressure using vacuum pump 4
Gas cylinder 3 and pipeline are evacuated, and are then shut off motor-driven valve I 7, motor-driven valve II 8；
Step S4, I 1 computer heating control of insulating box to setting high temperature T0(set temperature T0It is selected to be higher than formation temperature, according to
Experiment condition is typically chosen prime stratum temperature), consider that storage pressure is lower causes to coagulate for the test of injection gas initial stage phase transition under high pressure
Retrograde condensation phenomenon occurs for gassing, and insulating box II 2 should be heated above setting high temperature T030 DEG C, and keep stable；
Step S5: opening motor-driven valve I 7, motor-driven valve III 9, motor-driven valve IV 10, will be in intermediate receptacle 6 using constant speed and constant pressure pump 5
Content of wax condensation gas motor-driven valve III 9 Isobarically Control fine tuning under, be slowly injected into phase transition under high pressure test gas cylinder 3, reach and set
Determine high pressure P0And stablize, it is then shut off motor-driven valve I 7, motor-driven valve III 9；
Step S6: control II 2 temperature of insulating box remain unchanged, insulating box I 1 from setting high temperature T0Start every certain temperature difference
(2 DEG C) cool down and stablize automatically, and computer acquires different moments tiPhase transition under high pressure tests the pressure and temperature in gas cylinder 3；
Step S7: when calorstat temperature drops to the lower limit temperature of setting, stopping cooling recording pressure and temperature at this time, and
Experiment measures wax molecular weight Ms；
After the completion of above-mentioned experimental procedure, calculated by following steps；
Step S8, setting high temperature T is calculated0, setting high pressure P0, initial time t0Under the conditions of, phase transition under high pressure tests gas cylinder (3)
The initial tolerance N of middle content of wax condensate gas0, wherein deviation factors Z0It is solved by equation of gas state method；
In formula: T0To set high temperature；P0To set high pressure；V0Gas cylinder volume is tested for phase transition under high pressure；Z0For initial time gas
Body deviation factors；R is Avgadro constant；
Step S9, t is calculatediMoment phase transition under high pressure tests the gas phase content N in gas cylinder (3)i；
Had according to the equation of gas state,
PiVi=ZiNiRTi
And then the amount Ni of ti moment gaseous matter is obtained,
In formula: TiFor tiThe temperature at moment；PiFor tiThe pressure at moment；ViFor tiMoment phase transition under high pressure tests gas in gas cylinder
Volume；ZiFor tiMoment deviation factor for gas；R is Avgadro constant；
Step S10, t is calculatediMoment phase transition under high pressure tests the precipitation wax amount in gas cylinder (3)
Assuming that 1: after ignoring condensation air elutriation wax, sample multi-phase ingredients (gas and solid wax mixing or gas and solid-liquid wax
Mixing) to deviation factors ZiThe influence of calculating.
Assuming that 2: analysis wax amount is less in condensate gas, ignores the solid volume that wax is precipitated to gas volume ViInfluence, then may be used
To be approximately considered: Vi=V0。
So analysis wax amount is calculated
In formula: T0To set high temperature；P0To set high pressure；V0Gas cylinder volume is tested for phase transition under high pressure；Z0For initial time gas
Body deviation factors；TiFor tiThe temperature at moment；PiFor tiThe pressure at moment；ViFor tiMoment phase transition under high pressure is tested gas in gas cylinder and is held
Product；ZiFor tiMoment deviation factor for gas；R is Avgadro constant；
In above-mentioned formula, pressure PiWith temperature TiIt is directly acquired by computer, belongs to known parameters；R is constant；It only needs to ask
Deviate factor Zi, analysis wax amount can be found outSo utilizing the Solving Equation of State deviation factors such as PR Zi；
Step S11, wax precipitation point is determined；
Experimental data as shown in Figure 2, from the 5th point (T5, p5) start in condensate gas to analyse wax, in the 15th point
(T15, p15) wax amount stabilization is analysed afterwards, make first point (T1, p1) to the 5th point of (T5, p5) linear regression straight line L1, the 6th point
(T6, p6) to the 15th point (T15, p15) linear regression straight line L2, straight line L1With straight line L2Crosspoint (T5, p5) it is to analyse
Wax point.
Step S12, to initial tolerance N0 1It is modified；
In formula:To correct initial tolerance；S is the number of test points before wax precipitation point occurs；NiFor tiMoment phase transition under high pressure is surveyed
Gas phase content in gas testing bottle；
Experimental data as shown in Figure 2, in the 5th point (T5, p5) start to analyse wax in moment condensate gas, therefore initial gas gauge
Calculate formula are as follows:
Step S13, to tiMoment phase transition under high pressure tests the precipitation wax amount in gas cylinder (3)It is modified；
Wherein:Indicate tiThe amount that wax amount occupies gaseous matter corresponding to volume is precipitated in moment.
According to the equation of gas state:
In formula: ViIndicate tiVolume occupied by wax amount is precipitated in moment.
Because having,ρsIndicate the molar density that wax is precipitated.
It derives:
So have,
Solve ρgi。
According to the equation of gas state:
PV=ZnRT
In formula:For revised precipitation wax amount；ρgiFor the molar density of gas；ρsTo indicate that the mole close of wax is precipitated
Degree；TiFor tiThe temperature at moment；PiFor tiThe pressure at moment；ZiFor tiMoment deviation factor for gas；
Degassing condensate is obtained using condensate gas well separator among the above and carries out dewaxing treatment, is tested and is obtained using weighing method
The density p of solid waxs；
Wax molecular weight M is measured using the methods of VPO (vapor-pressure osmometry) experiments；
Step S14, according to wax molecular weight M obtained abovesWith revised precipitation wax amountCalculate analysis wax amount ms；
In formula: msTo analyse wax amount；MsFor wax molecular weight；For revised precipitation wax amount.
The above is not intended to limit the present invention in any form, although the present invention takes off through the foregoing embodiment
Show, however, it is not intended to limit the invention, any person skilled in the art, is not departing from technical solution of the present invention range
It is interior, made when the technology contents using the disclosure above and change or be modified to the equivalent embodiments of equivalent variations a bit, but it is all not
Be detached from technical solution of the present invention content, according to the technical essence of the invention it is to the above embodiments it is any it is simple modification,
Equivalent variations and modification, all of which are still within the scope of the technical scheme of the invention.
Claims (10)
1. a kind of high temperature and pressure condensation air elutriation wax amount test device, which is characterized in that including insulating box I (1), insulating box II (2),
Phase transition under high pressure tests gas cylinder (3), vacuum pump (4), constant speed and constant pressure pump (5), intermediate receptacle (6), pipeline；
The vacuum pump (4), phase transition under high pressure test gas cylinder (3), intermediate receptacle (6), constant speed and constant pressure pump (5) pass sequentially through pipeline company
It is logical；
Phase transition under high pressure test gas cylinder (3) both ends are respectively equipped with motor-driven valve I (7), motor-driven valve II (8), the intermediate receptacle (6)
Both ends are respectively equipped with motor-driven valve III (9), motor-driven valve IV (10)；
Phase transition under high pressure test gas cylinder (3), motor-driven valve I (7), motor-driven valve II (8) are arranged in insulating box I (1), it is described in
Between container (6), motor-driven valve III (9), motor-driven valve IV (10) be arranged in insulating box II (2)；
Phase transition under high pressure test gas cylinder (3) is equipped with temperature sensor I (11), pressure sensor I (12), the temperature sensing
Device I (11), pressure sensor I (12) are respectively positioned on insulating box I (1) outside；
The intermediate receptacle (6) is equipped with temperature sensor II (13), pressure sensor II (14), the temperature sensor II
(13), pressure sensor II (14) is respectively positioned on insulating box II (2) outside.
2. a kind of high temperature and pressure condensation air elutriation wax amount test device according to claim 1, which is characterized in that the pipeline
Metal sealing is all made of between (6) with phase transition under high pressure test gas cylinder (3), intermediate receptacle.
3. a kind of high temperature and pressure condensation air elutriation wax amount test device according to claim 1 or 2, which is characterized in that described
Temperature sensor I (11), pressure sensor I (12), temperature sensor II (13), pressure sensor II (14) precision be at least up to
To 0.01 grade.
4. a kind of high temperature and pressure condensation air elutriation wax amount test device according to claim 1, which is characterized in that described electronic
Valve I (7), motor-driven valve II (8), motor-driven valve III (9), motor-driven valve IV (10) are high temperature high voltage resistant motor-driven valve, and aperture is controllable, real
Now finely tune.
5. a kind of high temperature and pressure condensation air elutriation wax amount test device according to claim 1, which is characterized in that test dress
Setting further includes computer, the computer respectively with insulating box I (1), insulating box II (2), temperature sensor I (11), pressure sensor I
(12), temperature sensor II (13), pressure sensor II (14) electrical connection.
6. a kind of high temperature and pressure condensation air elutriation wax amount test device according to claim 1, which is characterized in that the constant temperature
Thermal insulation board (15) are equipped between case I (1), insulating box II (2).
7. a kind of high temperature and pressure condensation air elutriation wax weight testing method, which comprises the following steps:
Step S1, cleaning equipment and pipeline, connect experimental provision, with alcohol, petroleum ether cleaning experiment system；
Step S2, ground laminar flow sample is prepared, content of wax condensation gas is filled in intermediate receptacle (6), and be maintained at stratum Temperature-pressure Conditions
Under；
Step S3, motor-driven valve I (7), motor-driven valve II (8) are opened, are closed motor-driven valve III (9), using vacuum pump (4) by phase transition under high pressure
Test gas cylinder (3) and pipeline are evacuated, and are then shut off motor-driven valve I (7), motor-driven valve II (8)；
Step S4, insulating box I (1) computer heating control to setting high temperature T0, insulating box II (2), which should be heated above, sets high temperature T0, and protect
It is fixed to keep steady；
Step S5: opening motor-driven valve I (7), motor-driven valve III (9), motor-driven valve IV (10), is held centre using constant speed and constant pressure pump (5)
Content of wax condensation gas in device (6) is slowly injected into phase transition under high pressure test gas cylinder under the Isobarically Control fine tuning of motor-driven valve III (9)
(3), reach setting high pressure P0And stablize, it is then shut off motor-driven valve I (7), motor-driven valve III (9)；
Step S6: control insulating box II (2) temperature remain unchanged, insulating box I (1) from setting high temperature T0The automatic cooling of beginning is simultaneously steady
Fixed, computer acquires different moments tiPhase transition under high pressure tests the pressure and temperature in gas cylinder (3)；
Step S7: when insulating box I (1) temperature drops to the lower limit temperature of setting, stopping cooling recording pressure and temperature at this time, and
Experiment measures wax molecular weight Ms；
Step S8, setting high temperature T is calculated0, setting high pressure P0, initial time t0Under the conditions of, contain in phase transition under high pressure test gas cylinder (3)
The initial tolerance N of wax condensate gas0, wherein deviation factors Z0It is solved by equation of gas state method；
In formula: T0To set high temperature；P0To set high pressure；V0Gas cylinder volume is tested for phase transition under high pressure；Z0It is inclined for initial time gas
The poor factor；R is Avgadro constant；
Step S9, t is calculatediMoment phase transition under high pressure tests the gas phase content N in gas cylinder (3)i；
In formula: TiFor tiThe temperature at moment；PiFor tiThe pressure at moment；ViFor tiMoment phase transition under high pressure is tested gas in gas cylinder and is held
Product；ZiFor tiMoment deviation factor for gas；R is Avgadro constant；
Step S10, t is calculatediMoment phase transition under high pressure tests the precipitation wax amount in gas cylinder (3)
In formula: T0To set high temperature；P0To set high pressure；V0Gas cylinder volume is tested for phase transition under high pressure；Z0It is inclined for initial time gas
The poor factor；TiFor tiThe temperature at moment；PiFor tiThe pressure at moment；ViFor tiMoment phase transition under high pressure tests gas volume in gas cylinder；
ZiFor tiMoment deviation factor for gas；R is Avgadro constant；
Step S11, wax precipitation point is obtained, and to initial toleranceIt is modified；
In formula:To correct initial tolerance；S is the number of test points before wax precipitation point occurs；NiFor tiMoment phase transition under high pressure tests gas
Gas phase content in bottle；
Step S12, to tiMoment phase transition under high pressure tests the precipitation wax amount in gas cylinder (3)It is modified；
In formula:For revised precipitation wax amount；ρgiFor the molar density of gas；ρsTo indicate that the molar density of wax is precipitated；Ti
For tiThe temperature at moment；PiFor tiThe pressure at moment；ZiFor tiMoment deviation factor for gas；
Step S13, according to wax molecular weight M obtained abovesWith revised precipitation wax amountCalculate analysis wax amount ms；
In formula: msTo analyse wax amount；MsFor wax molecular weight；For revised precipitation wax amount.
8. a kind of high temperature and pressure condensation air elutriation wax weight testing method according to claim 7, which is characterized in that the setting
High temperature T0For prime stratum temperature, high pressure P is set0For original formation pressure.
9. a kind of high temperature and pressure condensation air elutriation wax weight testing method according to claim 7 or 8, which is characterized in that described
Temperature in step 4 in insulating box II (2) is 30 DEG C higher than the temperature of insulating box I (1).
10. a kind of high temperature and pressure condensation air elutriation wax weight testing method according to claim 7, which is characterized in that the step
Cooled down in rapid S6 with 2 DEG C of the temperature difference.
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| CN110879196A (en) * | 2019-12-13 | 2020-03-13 | 西南石油大学 | Oil-water phase permeability testing method for oil-rich condensate gas reservoir |
| CN113252421A (en) * | 2021-06-17 | 2021-08-13 | 西南石油大学 | Device and method for measuring trace carbon isotopes and heavy components in natural gas |
| CN113533147A (en) * | 2021-07-16 | 2021-10-22 | 西南石油大学 | Device and method for measuring wax precipitation condition of micro-wax-containing natural gas |
| CN115407052A (en) * | 2022-08-18 | 2022-11-29 | 西南石油大学 | Method for testing influence of wax content on phase state of high-wax-content condensate oil gas system |
| CN116183435A (en) * | 2023-04-23 | 2023-05-30 | 西南石油大学 | Experimental device and method for measuring components of mixed gas in nano-pore |
| CN116840192A (en) * | 2023-03-23 | 2023-10-03 | 西南石油大学 | Cross-scale condensate gas mist flow gravity settlement relaxation time testing method |
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| CN115407052A (en) * | 2022-08-18 | 2022-11-29 | 西南石油大学 | Method for testing influence of wax content on phase state of high-wax-content condensate oil gas system |
| CN115407052B (en) * | 2022-08-18 | 2023-09-19 | 西南石油大学 | Method for testing influence of wax content on phase state of high-wax-content condensate oil-gas system |
| CN116840192A (en) * | 2023-03-23 | 2023-10-03 | 西南石油大学 | Cross-scale condensate gas mist flow gravity settlement relaxation time testing method |
| CN116840192B (en) * | 2023-03-23 | 2024-01-09 | 西南石油大学 | Cross-scale condensate gas mist flow gravity settlement relaxation time testing method |
| CN116183435A (en) * | 2023-04-23 | 2023-05-30 | 西南石油大学 | Experimental device and method for measuring components of mixed gas in nano-pore |
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