CN108591831A - A method of regulating and controlling waxy crude oil yield stress using alternating magnetic field - Google Patents
A method of regulating and controlling waxy crude oil yield stress using alternating magnetic field Download PDFInfo
- Publication number
- CN108591831A CN108591831A CN201810315270.XA CN201810315270A CN108591831A CN 108591831 A CN108591831 A CN 108591831A CN 201810315270 A CN201810315270 A CN 201810315270A CN 108591831 A CN108591831 A CN 108591831A
- Authority
- CN
- China
- Prior art keywords
- crude oil
- magnetic field
- alternating magnetic
- yield stress
- waxy crude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The present invention provides a kind of methods regulating and controlling waxy crude oil yield stress using alternating magnetic field.This approach includes the following steps：Apply alternating magnetic field to the waxy crude oil of gelling to handle.The present invention also provides a kind of methods that waxy crude oil yield stress is reduced during crude oil pipeline stopped flow injection analysis comprising following steps：While crude oil pipeline starts, the waxy crude oil of gelling is handled using alternating magnetic field.The present invention influences the interaction of Related Component in crude oil using alternating magnetic field, waxy crude oil yield stress is being significantly reduced, while reducing stopped flow injection analysis difficulty, is not changing the ingredient of crude oil, therefore the quality for not interfering with crude oil, will not more increase the danger of crude oil.
Description
Technical field
The present invention relates to a kind of methods regulating and controlling waxy crude oil yield stress using alternating magnetic field, belong to Crude Oil Transportation technology
Field.
Background technology
China's onshore oil field, offshore oilfield institute output crude oil in 80% or more waxy crude oil accounting.Waxy crude oil is one
The COMPLEX MIXED objects system that kind is made of hydro carbons and non-hydrocarbons, ingredient includes paraffin, colloid, asphalitine and solution gas etc..Contain
The property of wax crude oil itself and the environment residing for it directly influence dissolved state of the paraffin in crude oil.In wax-containing oil pipe
During conveying, in order to ensure that waxy crude oil has enough mobility, need to control its temperature at least more than condensation point.But
It is pipeline in operation or operation, inevitably the case where stopping transportation can occurs due to periodic inspection or burst accident.Ordinary circumstance
Under, environment temperature residing for pipeline is less than crude oil temperature, with the reduction of crude oil temperature after stopping transportation, when temperature be down to wax precipitation point with
Afterwards, the wax being dissolved in crude oil is gradually precipitated, and forms wax crystalline substance, as temperature further decreases, wax crystalline phase is mutually cross-linked to form continuously
Three-dimensional net structure, cause crude oil to be gelled, the crude oil yield stress under the state is very big, is needed when pipeline is restarted larger
Restarting pressure, if shutdown time is long, can cause it is serious it is solidifying run affairs therefore.Yield stress characterizes original from macroscopic appearance
The intensity of factice concretio is the important parameter of wax-containing oil pipe flowing safety, directly reflects wax-containing oil pipe and open again
Dynamic complexity.
Currently, can starting pipeline before crude oil loses flowability by controlling shutdown time, avoiding solidifying event of running affairs.Separately
Outside, the chemical modification method that chemical addition agent (pour-point depressant) is added in waxy crude oil has received significant attention, by polar group
The high molecular polymer of group and nonpolar chain alkyl composition can interact with paraffin, to reduce the condensation point of waxy crude oil
With yield stress and improve its low temperature flow.But there are still some problems for pour-point depressant technology, for example pour-point depressant has synthesis
Difficulty, specific aim be not strong, there is temperature recovery to deteriorate area, stablize timeliness is short, leads to the increase of wax deposit amount etc..It is therefore proposed that more
The efficient method for reducing waxy crude oil yield stress is added to be of great significance in actual production.
Invention content
In order to solve the above technical problems, the purpose of the present invention is to provide a kind of regulation and control waxy crude oil surrenders of alternating magnetic field to answer
The method of power, this method do not need complicated operating procedure and can effectively reduce waxy crude oil yield stress, reduce pipeline shutdown
Restart difficulty, to reduce cost of crude oil production.
In order to achieve the above object, the present invention provides using alternating magnetic field regulate and control waxy crude oil yield stress method,
It includes the following steps：Apply alternating magnetic field to the waxy crude oil of gelling to handle.
The present invention also provides a kind of method for reducing waxy crude oil yield stress during crude oil pipeline stopped flow injection analysis,
It includes the following steps：While crude oil pipeline starts, the waxy crude oil of gelling is handled using alternating magnetic field.Crude oil
Pipeline shutdown needs to be again started up for a period of time afterwards, applies alternating magnetic field processing while turn on pump starts pipeline, that is, allows crude oil
In alternating magnetic field, make crude oil that interaction occur to change the Macro-Rheological Characterization matter of crude oil with alternating magnetic field.
Specific embodiment according to the present invention, it is preferable that the magnetic induction intensity of above-mentioned alternating magnetic field may be controlled to 0-
0.6T, field frequency may be controlled to 0-60Hz, and suitable magnetic induction intensity and magnetic field frequency can be preferably gone out according to different crude oil
Rate.
Specific embodiment according to the present invention, it is preferable that magnetic induction intensity is used by alternating magnetic field processing
0.1-0.6T when field frequency is 5-60Hz, reduces the yield stress effect of waxy crude oil clearly, magnetic induction intensity is too small
When, yield stress reduces unobvious, and when magnetic induction intensity is excessive, overall cost increases, and is unfavorable for producing.It is for paraffin content
10% waxy crude oil, when the magnetic induction intensity of alternating magnetic field is 0.3-0.4T, the field frequency of alternating magnetic field is 30-40Hz
When, best results.
Yield phenomenon refers to when stress reaches certain value, and stress has small increase, and strains showing for sharp increase
As it is yield stress to make the stress that material is surrendered.In the present invention, it is former to reflect the content of wax under static conditions for yield stress
The strength of waxy structure of oil, yield stress are that the macroscopic view of gelling waxy crude oil structural strength (material does not flow) embodies, and are had
The substance of " microstructure " just has yield stress.Core of the invention is that the wax destroyed in waxy crude oil using alternating magnetic field is brilliant
Structure, reduces its static structure intensity, and influence is had no on viscosity.
It is compared with the prior art, the advantage of the invention is that：
(1) present invention influences the interaction of Related Component in crude oil using alternating magnetic field, is significantly reducing waxy crude oil
Yield stress while reducing stopped flow injection analysis difficulty, does not change the ingredient of crude oil, therefore does not interfere with the quality of crude oil,
The danger of crude oil will not more be increased；
(2) method employed in the present invention is alternating magnetic field physical treatment process, and any pollution will not be discharged into environment
Substance, therefore this method has environment friendly；
(3) the required energy consumption of alternating magnetic field facture is very low, and method of the invention has the characteristics that low energy consumption.
Description of the drawings
Fig. 1 is influence result figure of the magnetic induction intensity of alternating magnetic field to yield stress.
Fig. 2 is influence result figure of the field frequency of alternating magnetic field to yield stress.
Fig. 3 is influence result figure of the alternating magnetic field to Daqing crude oil yield stress.
Specific implementation mode
In order to which technical characteristic, purpose and the advantageous effect to the present invention are more clearly understood, now to the skill of the present invention
Art scheme carry out it is described further below, but should not be understood as to the present invention can practical range restriction.
Experiment one
D80 solvent naphthas are used to prepare paraffin content for 10% content of wax simulation oil, as experiment oil sample.
Using the yield stress of TA DHR rheometry content of wax simulation oils, experimental temperature is 20 DEG C, alternating magnetic field frequency
For 20Hz, the situation of change of the yield stress of the content of wax simulation oil under different magnetic induction intensity is measured.
Pretreatment：The memory of thermal history and shear history is pre-processed to eliminate content of wax simulation oil, it is specific to grasp
Work is that the oil sample being contained in port grinding bottle is heated to 60 DEG C, and constant temperature 2h in a water bath, the basic sample as experiment.When filling sample
Also rheometry system is made to be under conditions of 60 DEG C, the influence to avoid temperature change dramatically to oil sample rheological characteristic.
Experimental procedure：The oil sample pre-processed is fitted into TA DHR rheometry systems, constant temperature is kept at 60 DEG C
System temperature is then down to 20 DEG C and constant temperature and keeps 30min that structure is made to be sufficiently formed by 10min, and rate of temperature fall is 0.5 DEG C/
min；Stress is applied to oil sample with the loading stress rate of 5Pa/min at this time, and measuring strain is with the curve of stress variation, to
Measure the yield stress of content of wax simulation oil.Apply action of alternating magnetic field while measuring yield stress, measures different alternation magnetic
The situation of change of the yield stress of content of wax simulation oil under induction, the results are shown in Figure 1.
Experiment one the result shows that：
1. for paraffin content is 10% content of wax simulation oil, when no magnetic field, measures yield value close to 41Pa.
2. the intensity of the alternating magnetic field (20Hz) applied is 0.1T, measures yield value and be reduced to 37Pa or so；Work as magnetic strength
When intensity being answered to increase to 0.2T, 0.3T, 28Pa, 16Pa is greatly reduced in yield value respectively, and alternating magnetic field is shown at this time
Effect clearly；When magnetic induction intensity further increases 0.4T, yield value is reduced to the minimum of this experiment
Value 4Pa；When magnetic field increases to 0.5T, 0.6T, the yield value of waxy crude oil performance rebounds to 7Pa, 9Pa.
3. in waxy crude oil to the response of magnetic alternating induction intensity there are a peak value, effect is good in peak value section, area
Between outer effect it is slightly worse.For the experiment, the optimization process magnetic induction intensity of alternating magnetic field is 0.4T.
Experiment two
The content of wax simulation oil that paraffin content is 10% is prepared using D80 solvent naphthas, as experiment oil sample.
Using the yield stress of TA DHR rheometry content of wax simulation oils, experimental temperature is 20 DEG C, and magnetic alternating induction is strong
Degree is 0.3T, measures the situation of change of the yield stress of the content of wax simulation oil under different magnetic field frequency.
Pretreatment：It is identical as the pre-treatment step in experiment one.
Experimental procedure：The oil sample pre-processed is fitted into TA DHR rheometry systems, constant temperature is kept at 60 DEG C
System temperature is then down to 20 DEG C and constant temperature and keeps 30min that structure is made to be sufficiently formed by 10min, and rate of temperature fall is 0.5 DEG C/
min.Stress is applied to oil sample with the loading stress rate of 5Pa/min at this time, and measuring strain is with the curve of stress variation, to
Measure the yield stress of content of wax simulation oil.Apply action of alternating magnetic field while measuring yield stress, measures different alternation magnetic
The situation of change of the yield stress of content of wax simulation oil under field frequencies range, the results are shown in Figure 2.
Experiment two the result shows that：
1. for paraffin content is 10% content of wax simulation oil, when no magnetic field, measures yield value close to 41Pa.
2. add alternating magnetic field (0.3T) frequency very little (1Hz), yield value is without too big variation；When field frequency increases to
When 5Hz, 10Hz, yield value is reduced to 29Pa, 24Pa or so respectively, has there is positive effect；When field frequency continues to increase to
When 20Hz, yield value is reduced to 16Pa or so；When field frequency increases to 30Hz, 40Hz, measure yield value be respectively 15Pa,
12Pa, the flow resistance after being surrendered in 40Hz is also minimum, reaches the optimum frequency area for reducing surrender effect；When field frequency into
After one step increases (50Hz, 60Hz), the yield value showed rebounds to 21Pa.
3. in waxy crude oil to the response of alternating magnetic field frequency there are a peak value, effect is good in peak value section, section
Outer effect is slightly worse.
Experiment three
Three kinds of content of wax simulation oils that paraffin content is 7%, 10%, 15% are prepared respectively using D80 solvent naphthas, as experimental oil
Sample.
It is 7%, 10%, 15% for paraffin content using the yield stress of TA DHR rheometry content of wax simulation oils
Three kinds of oil samples, measuring temperature are respectively 5 DEG C, 10 DEG C, 15 DEG C, and three kinds of samples have been gelled under its measuring temperature.
Pretreatment：It is identical as the pre-treatment step in experiment one.
Experimental procedure：The oil sample pre-processed is fitted into TA DHR rheometry systems, constant temperature is kept at 60 DEG C
System temperature is then down to the corresponding measuring temperature of sample and constant temperature keeps 30min that structure is made to be sufficiently formed, cooled down by 10min
Rate is 0.5 DEG C/min.Stress is applied to oil sample with the loading stress rate of 5Pa/min at this time, and measuring strain becomes with stress
The curve of change, to measure the yield stress of content of wax simulation oil.Apply action of alternating magnetic field while measuring yield stress, surveys
The situation of change of the yield stress of the content of wax simulation oil under different alternating magnetic field frequencies is measured, the results are shown in Table 1.
Table 1
Experiment three the result shows that：Under action of alternating magnetic field, the yield stress of the content of wax simulation oil under various paraffin contents
There is apparent reduction.
Embodiment
Using the Daqing crude oil that paraffin content is 28.6% as experiment oil sample, TA DHR rheometry waxy crude oil is utilized
Yield stress, measuring temperature are 28 DEG C, and sample has been gelled under its measuring temperature.
Pretreatment：It is identical as the pre-treatment step in experiment one.
Experimental procedure：The oil sample pre-processed is fitted into TA DHR rheometry systems, constant temperature is kept at 60 DEG C
System temperature is then down to 28 DEG C and constant temperature and keeps 30min that structure is made to be sufficiently formed by 10min, and rate of temperature fall is 0.5 DEG C/
min.Stress is applied to oil sample with the loading stress rate of 5Pa/min at this time, and measuring strain is with the curve of stress variation, to
Measure the yield stress of crude oil.Apply action of alternating magnetic field while measuring yield stress, measures Daqing crude oil in alternation magnetic
The situation of change of yield stress under field action, the results are shown in Figure 3.
Result of this example indicate that：For the Daqing crude oil that paraffin content is 28.6%, measured under no magnetic field condition
Yield stress be 90Pa, it is 13Pa that yield stress is measured under the conditions of alternating magnetic field (0.3T, 20Hz).In the effect of alternating magnetic field
Under, the yield stress of Daqing crude oil sample significantly reduces.
It can be seen that the alternating magnetic field using appropriate field frequency, appropriate field frequency handles waxy crude oil, it can be notable
The yield stress for reducing waxy crude oil needs to reduce waxy crude oil surrender suitable for all including stopped flow injection analysis field
The occasion of stress.Stopped flow injection analysis difficulty can be reduced using the method for the present invention, reduces pipeline and starts pressure, energy saving, drop
Low pipeline start-up cost, the present invention have high economic value.
Claims (10)
1. a kind of method regulating and controlling waxy crude oil yield stress using alternating magnetic field comprising following steps：
Apply alternating magnetic field to the waxy crude oil of gelling to handle.
2. according to the method described in claim 1, wherein, the magnetic induction intensity of the alternating magnetic field is 0-0.6T；Preferably
0.1-0.6T。
3. method according to claim 1 or 2, wherein the field frequency of the alternating magnetic field is 0-60Hz；Preferably 5-
60Hz。
4. according to claim 1-3 any one of them methods, wherein the magnetic induction intensity of the alternating magnetic field is 0.3-
The field frequency of 0.4T, the alternating magnetic field are 20-50Hz.
5. according to the method described in claim 4, wherein, the paraffin content of the waxy crude oil is 10%.
6. a kind of method for reducing waxy crude oil yield stress during crude oil pipeline stopped flow injection analysis comprising following steps：
While crude oil pipeline starts, the waxy crude oil of gelling is handled using alternating magnetic field.
7. according to the method described in claim 6, wherein, the magnetic induction intensity of the alternating magnetic field is 0-0.6T；Preferably
0.1-0.6T。
8. the method described according to claim 6 or 7, wherein the field frequency of the alternating magnetic field is 0-60Hz；Preferably 5-
60Hz。
9. according to claim 6-8 any one of them methods, wherein the magnetic induction intensity of the alternating magnetic field is 0.3-
The field frequency of 0.4T, the alternating magnetic field are 30-40Hz.
10. according to the method described in claim 9, wherein, the paraffin content of the waxy crude oil is 10%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315270.XA CN108591831A (en) | 2018-04-10 | 2018-04-10 | A method of regulating and controlling waxy crude oil yield stress using alternating magnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810315270.XA CN108591831A (en) | 2018-04-10 | 2018-04-10 | A method of regulating and controlling waxy crude oil yield stress using alternating magnetic field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108591831A true CN108591831A (en) | 2018-09-28 |
Family
ID=63621352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810315270.XA Pending CN108591831A (en) | 2018-04-10 | 2018-04-10 | A method of regulating and controlling waxy crude oil yield stress using alternating magnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108591831A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541008A (en) * | 2018-12-26 | 2019-03-29 | 中国石油大学(北京) | Reduce, test the method and device of gelled crude yield stress |
| CN116333707A (en) * | 2022-12-02 | 2023-06-27 | 清华大学 | Flow modification method of easily-congealed high-viscosity crude oil |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2821150Y (en) * | 2005-07-18 | 2006-09-27 | 黄丽敏 | Electromagnetic effect wax removing and viscosity reducing device |
| CN101290089A (en) * | 2008-06-11 | 2008-10-22 | 中国石油天然气股份有限公司 | Pipeline composite magnetic field wax-proof viscosity reducing processing unit |
| CN204042309U (en) * | 2014-07-17 | 2014-12-24 | 哈尔滨理工大学 | Magnetic hot compound wax control plug removal equipment said by transport pipe |
| US9000778B2 (en) * | 2011-08-15 | 2015-04-07 | Gas Technology Institute | Communication method for monitoring pipelines |
| CN104531208A (en) * | 2014-12-31 | 2015-04-22 | 哈尔滨工业大学 | Thickened oil viscosity reducing device and thickened oil viscosity reducing method using same |
| CN104633385A (en) * | 2014-12-07 | 2015-05-20 | 中国石油化工股份有限公司 | Wax-bearing crude conveying pipeline |
| CN104132215B (en) * | 2014-07-17 | 2017-02-01 | 哈尔滨理工大学 | Acoustic-magnetic-thermal combined paraffin-control and plug-removal method and device for oil pipeline |
| US20170248731A1 (en) * | 2014-10-17 | 2017-08-31 | Halliburton Energy Services, Inc. | High Sensitivity Electric Field Sensor |
-
2018
- 2018-04-10 CN CN201810315270.XA patent/CN108591831A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2821150Y (en) * | 2005-07-18 | 2006-09-27 | 黄丽敏 | Electromagnetic effect wax removing and viscosity reducing device |
| CN101290089A (en) * | 2008-06-11 | 2008-10-22 | 中国石油天然气股份有限公司 | Pipeline composite magnetic field wax-proof viscosity reducing processing unit |
| US9000778B2 (en) * | 2011-08-15 | 2015-04-07 | Gas Technology Institute | Communication method for monitoring pipelines |
| CN204042309U (en) * | 2014-07-17 | 2014-12-24 | 哈尔滨理工大学 | Magnetic hot compound wax control plug removal equipment said by transport pipe |
| CN104132215B (en) * | 2014-07-17 | 2017-02-01 | 哈尔滨理工大学 | Acoustic-magnetic-thermal combined paraffin-control and plug-removal method and device for oil pipeline |
| US20170248731A1 (en) * | 2014-10-17 | 2017-08-31 | Halliburton Energy Services, Inc. | High Sensitivity Electric Field Sensor |
| CN104633385A (en) * | 2014-12-07 | 2015-05-20 | 中国石油化工股份有限公司 | Wax-bearing crude conveying pipeline |
| CN104531208A (en) * | 2014-12-31 | 2015-04-22 | 哈尔滨工业大学 | Thickened oil viscosity reducing device and thickened oil viscosity reducing method using same |
Non-Patent Citations (2)
| Title |
|---|
| 国家能源局: "《中华人民共和国石油天然气行业标准》", 15 October 2014 * |
| 年威等: "变频磁场原油降粘技术的研究", 《辽宁化工》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109541008A (en) * | 2018-12-26 | 2019-03-29 | 中国石油大学(北京) | Reduce, test the method and device of gelled crude yield stress |
| CN116333707A (en) * | 2022-12-02 | 2023-06-27 | 清华大学 | Flow modification method of easily-congealed high-viscosity crude oil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108591831A (en) | A method of regulating and controlling waxy crude oil yield stress using alternating magnetic field | |
| CN203376225U (en) | Heat cycle test equipment | |
| CN204140527U (en) | A kind of hydraulic system of walking-beam furnace | |
| CN201503346U (en) | Control system for detecting oil temperature of speed changer | |
| CN104246124B (en) | For the linear decompressor for adjusting injection pressure in intensified oil reduction system | |
| CN106018156B (en) | Dynamic simulation evaluation device and evaluation method for chemical paraffin remover | |
| CN107974246B (en) | High-temperature-resistant cross-linked acid system, preparation method and application | |
| CN105462673A (en) | Environment-friendly emulsified oil for hydraulic support and preparation method of environment-friendly emulsified oil | |
| CN203917556U (en) | A kind of automatic pressure relief device of hydraulic extrusion press for three-way pipe fitting | |
| CN101762426A (en) | Hydraulic hard tube experimental table and experimental method | |
| NO20171882A1 (en) | Method for Inverting Oil Continuous Flow to Water Continuous Flow | |
| CN206299626U (en) | Low-loss bottom pouring type pouring machine hydraulic system | |
| CN112747254B (en) | Supercritical carbon dioxide injection device for thickened oil mechanism experiment | |
| CN203657991U (en) | Pipe pressure withstanding bursting testing machine | |
| CN107218009A (en) | A kind of low-permeability sandstone oil reservoir chromium aluminium ion compounding profile control agent and its application method | |
| CN105403404A (en) | Conveyer belt fatigue test device | |
| CN108252680A (en) | A kind of automatic control system and method for annular pressure of cementing the well | |
| CN204413116U (en) | A kind of water type die heater | |
| CN102788048B (en) | Engineering mechanical hydraulic oil tank, control method thereof and engineering machine | |
| CN102393631B (en) | Lubricating oil temperature control system based on fuzzy control | |
| CN205101321U (en) | Heating suitable for low temperature environment hoist | |
| CN211384576U (en) | Temperature-controllable high-pressure liquid enzyme on-line feeding system | |
| CN202757839U (en) | Slow strain rate stretching equipment | |
| CN203272267U (en) | Hydraulic auxiliary controller of hydraulic generator | |
| CN201421424Y (en) | Servo driving energy-saving pressure tester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180928 |