CN107389504A - For measuring the device and method of supercritical carbon dioxide fracturing fluid rheological characteristic - Google Patents
For measuring the device and method of supercritical carbon dioxide fracturing fluid rheological characteristic Download PDFInfo
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- CN107389504A CN107389504A CN201610323527.7A CN201610323527A CN107389504A CN 107389504 A CN107389504 A CN 107389504A CN 201610323527 A CN201610323527 A CN 201610323527A CN 107389504 A CN107389504 A CN 107389504A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/02—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material
- G01N11/04—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture
- G01N11/08—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by measuring flow of the material through a restricted passage, e.g. tube, aperture by measuring pressure required to produce a known flow
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Abstract
The present invention relates to oil fracturing field.The present invention proposes a kind of device for being used to measure supercritical carbon dioxide fracturing fluid rheological characteristic, and described device includes：Supercritical carbon dioxide pressure charging system, tackifier inject hybrid system, and supercritical carbon dioxide fracturing fluid circulation loop, carbon dioxide can be input in the supercritical carbon dioxide fracturing fluid circulation loop by the supercritical carbon dioxide pressure charging system, and tackifier can be input in the supercritical carbon dioxide fracturing fluid circulation loop by tackifier injection hybrid system.The invention also provides a kind of method for measuring supercritical carbon dioxide fracturing fluid rheological characteristic.Apparatus and method of the present invention can obtain the constitutive relation of supercritical carbon dioxide pressure break liquid flow variation characteristic under different temperatures, pressure condition.
Description
Technical field
The present invention relates to oil fracturing field, more particularly to one kind to be used to measure supercritical CO2The dress of fracturing fluid rheological characteristic
Put and method.
Background technology
Unconventional gas resource includes coal bed gas, shale gas, compact sandstone gas and Water Soluble Gas etc., current unconventional oil
Gas resource plays key player in global energy structure.The reservoir properties of unconventional petroleum resources are typically poor, tool
There are the physical property characteristics such as low-porosity, low-permeability, low pore throat radius, the more conventional oil-gas reservoir of flow resistance of oil gas is much bigger, and
And the intensification buried with reservoir, reservoir properties are deteriorated so that conventional production technique does not possess business extraction value, which dictates that
Unconventional petroleum resources needs to take fracture technology to improve well yield.By hydraulic fracturing technology be applied to shale gas and
The exploitation of the untraditional reservoirs such as tight gas, a series of problems, such as water-sensitive, reservoir pollution can be produced, some areas water resources shortage
And an important factor for restricting hydraulic fracturing technology application.
Supercritical carbon dioxide has low viscosity and the high density of high diffusivity coefficient and liquid and well molten of gas concurrently
Xie Xing.Supercritical carbon dioxide fracturing technique is that a kind of new Unconventional gas hides stimulation technology, with conventional hydraulic
Pressure break is compared, supercritical carbon dioxide fracturing fluid have low leak-off, height return row, it is small to reservoir pollution, prevent clay mineral aquation
Many advantages, such as expansion.Therefore, supercritical carbon dioxide fracturing fluid is can to improve unconventional reservoir flow conductivity, realizes business
One of effective means of high-efficiency mining.
Supercritical carbon dioxide fracturing fluid is the mixture that tackifier are dissolved in supercritical carbon dioxide.At present, by temperature,
Pressure influence, the Rheological Regularity of supercritical carbon dioxide fracturing fluid is considerably complicated, rarely has experimental data, for the mechanism of rheological characteristic
Also the explanation of neither one system, thus as a difficult point of supercritical fluid research field.
Measurement for fluid rheology, newton describe perfect fluid flow behavior correlation using parallel plate model at first
Viscosimetric analysis philosophy：τ=η γ, i.e.,：Shear stress=viscosity × shear rate.
The coaxial cylinders measurement rotor-support-foundation system of rotational rheometer is in the upper and lower plate benging of newton parallel plate model is formed
Outer two cylinders, the sample between two cylinders in space can shear any long-time, can measure under normal pressure, one
The rheological property of fluid in the range of constant temperature degree, such as the RS6000 systems of German HAAKE companies.Capillary viscometer is according to glass
Structure, the character of pipe are divided into Ubbelohde, Fen Shi, Ping Shi, four kinds of adverse current, and this viscosimeter can only be measured under normal pressure as the fluid of liquid
Kinematic viscosity.High pressure capillary viscosimeter can measure the viscosity of fluid under certain pressure, but due to no mixing arrangement,
Tackifier and supercritical carbon dioxide can not be sufficiently mixed dissolving, easy blocking pipeline, and measurement effect is bad.German HAAKE is public
The MARS rheologies instrument system of department can realize rheological measurement of the certain pressure with a temperature of, still, due to overcritical titanium dioxide
Carbon viscosity is very low, only 0.02mPas, thickening it is latter as be also no more than 10mPas, MARS system is in this range areas
Interior measurement accuracy is excessively poor.
The content of the invention
It is an object of the invention to provide a kind of device and method for measuring supercritical carbon dioxide fracturing fluid rheological characteristic, it is used for
Quickly measure the rheological parameter of supercritical carbon dioxide fracturing fluid under different Temperature-pressure Conditions, and then network analysis overcritical two
The rheological characteristic of carbonoxide fracturing fluid, experiment basis are provided for supercritical carbon dioxide FRACTURING DESIGN and theoretical research.
The present invention proposes a kind of device for being used to measure supercritical carbon dioxide fracturing fluid rheological characteristic, described device bag
Include：Supercritical carbon dioxide pressure charging system, tackifier injection hybrid system, and supercritical carbon dioxide fracturing fluid are recycled back to
Carbon dioxide can be input to the supercritical carbon dioxide fracturing fluid circulation by road, the supercritical carbon dioxide pressure charging system
In loop, and tackifier can be input to the supercritical carbon dioxide fracturing fluid circulation by tackifier injection hybrid system
In loop.
In one embodiment, the supercritical carbon dioxide pressure charging system is connected to described super face by the first valve
Boundary's carbon dioxide pressure break liquid circulation loop, the tackifier injection hybrid system are connected to described overcritical two by the second valve
Carbonoxide fracturing fluid circulation loop, the supercritical carbon dioxide fracturing fluid circulation loop are additionally provided with for exhaust mixture
3rd valve.
In one embodiment, in the supercritical carbon dioxide fracturing fluid circulation loop, it is provided with vavuum pump, follows
Ring pump, oil bath heater, static mixer, the mass flowmenter for measuring supercritical carbon dioxide mass flow, for measurement stream
Differential pressure pickup of the body in the flow differential pressure of measurement line sections and temperature sensor for measurement temperature.
In one embodiment, the tackifier injection hybrid system includes tackifier storage tank, for measuring tackifier
The tackifier measuring pump of amount and the plunger pump for providing power.
In one embodiment, dioxide bottle, gas are provided with the supercritical carbon dioxide pressure charging system
Body surge tank and gas booster pump.
In one embodiment, it is additionally provided with visualization window in the supercritical carbon dioxide fracturing fluid circulation loop
Mouthful.The admixture of supercritical carbon dioxide and tackifier can be observed by visual window, regulation pressure, temperature are provided for experiment
With the foundation of tackifier injection rate.
The invention also provides a kind of method for measuring supercritical carbon dioxide fracturing fluid rheological characteristic, methods described is led to
Above-mentioned device is crossed to implement, methods described comprises the following steps：By the supercritical carbon dioxide pressure charging system by dioxy
Change carbon to be input in the supercritical carbon dioxide fracturing fluid circulation loop；Gas boosting pump and oil bath heater are adjusted, will be real
Temperature, the pressure of check system are adjusted to the temperature, pressure of experiment setting；Hybrid system is injected by tackifier by the tackifier
It is input in the supercritical carbon dioxide fracturing fluid circulation loop；In the supercritical carbon dioxide fracturing fluid circulation loop
In so that the fluid-mixing of tackifier and supercritical carbon dioxide is flowed down in circulation pumping action and moved, and tackifier are set
Calibration standard is dissolved in supercritical carbon dioxide；Flow differential pressure of the fluid in measurement line sections is recorded, records overcritical titanium dioxide
Carbon mass flow, measurement thickening dosage, measurement temperature；The supercritical carbon dioxide pressure break under design temperature, pressure is calculated
Liquid Rheology Constitutive Equation.
In one embodiment, flow differential pressure of the fluid in measurement line sections is measured by differential pressure pickup, passes through matter
Flowmeter measurement supercritical carbon dioxide mass flow is measured, thickening dosage is measured by tackifier measuring pump, passes through TEMP
Device measurement temperature.
In one embodiment, circulated by the first Valve controlling amount of carbon dioxide and supercritical carbon dioxide fracturing fluid
Pressure in loop, dosage is viscosified by the second Valve controlling, followed by the 3rd Valved discharge supercritical carbon dioxide fracturing fluid
Mixture in loop back path, the temperature in supercritical carbon dioxide fracturing fluid circulation loop is controlled by oil bath heater.
In one embodiment, the admixture of supercritical carbon dioxide and tackifier is observed by visualization window,
Foundation as regulation pressure, temperature and tackifier injection rate.
Apparatus and method of the present invention can realize larger pressure and temperature wide-ultra critical carbon dioxide pressure break liquid stream
The stably measured of variable element；Static mixer can stir under high pressure, realize being sufficiently mixed for tackifier and supercritical carbon dioxide.
On the other hand, solubility of the different tackifier in supercritical carbon dioxide can be measured；It can obtain different temperatures, pressure condition
The constitutive relation of lower supercritical carbon dioxide pressure break liquid flow variation characteristic；Device is simple to operate, and method is easy to implement, and feasibility is high；
Measuring method science, the parameter measurement of degree of precision can be realized.
Above-mentioned technical characteristic can by it is various it is technically feasible in a manner of be combined to produce new embodiment, as long as can be real
The existing purpose of the present invention.
Accompanying drawing content
The present invention will hereinafter be retouched in more detail based on only non-limiting embodiment and refer to the attached drawing
State.Wherein：
Fig. 1 shows the schematic diagram of the device of the present invention.
In figure, identical component is indicated by identical reference.Accompanying drawing is not drawn according to the ratio of reality.
Embodiment
What Fig. 1 showed that the application proposed is used to measure supercritical CO2The device of fracturing fluid rheological characteristic.
Reference picture 1, it can be seen that what the application was proposed is used to measure supercritical CO2The device bag of fracturing fluid rheological characteristic
Include：Supercritical carbon dioxide pressure charging system, tackifier injection hybrid system and supercritical carbon dioxide pressure break fluid circulation.It is super
Critical carbon dioxide pressure break fluid circulation provides being recycled back to for the closure under HTHP for supercritical carbon dioxide fracturing fluid
Road.Carbon dioxide can be input to supercritical carbon dioxide fracturing fluid circulation loop by the supercritical carbon dioxide pressure charging system
In, and tackifier can be input in supercritical carbon dioxide fracturing fluid circulation loop by tackifier injection hybrid system.
Supercritical carbon dioxide pressure charging system provides required experimental pressure for carbon dioxide, and tackifier injection hybrid system will viscosify
Agent is pumped into the supercritical carbon dioxide pipeline of HTHP.
The supercritical carbon dioxide pressure charging system screws valve 4 (the first valve) by carbon dioxide entrance and is connected to
The supercritical carbon dioxide fracturing fluid circulation loop, the tackifier injection hybrid system screw valve 13 by tackifier entrance
(the second valve) is connected to the supercritical carbon dioxide fracturing fluid circulation loop, the supercritical carbon dioxide fracturing fluid circulation
Loop is additionally provided with screws valve 24 (the 3rd valve) for the emptying of exhaust mixture.In the supercritical carbon dioxide fracturing fluid
In circulation loop, be provided with vavuum pump 5, circulating pump 9, oil bath heater 6, static mixer 14, for measuring supercritical carbon dioxide
The mass flowmenter of mass flow, for measure fluid measurement line sections flow differential pressure differential pressure pickup and for surveying
The temperature sensor of amount temperature.
Its intermediate pump 5 is used to before testing take away the air in pipeline.Oil bath heater 6 is used to provide overcritical dioxy
Change the temperature needed for the experiment of carbon fracturing fluid.Further, in oil bath heater 6, be provided with intermediate receptacle thermometer 7 and in
Between container inner pressure meter 8, be respectively used to monitor oil bath heating during mixture internal temperature and pressure.Circulating pump 9 is used for
Maintain the flow circuit of the mixture fluid in whole supercritical carbon dioxide fracturing fluid circulation loop.Static mixer 14 is used to ensure
Being sufficiently mixed between carbon dioxide and tackifier so that tackifier are dissolved in supercritical carbon dioxide with established standardses.
Specifically, supercritical carbon dioxide fracturing fluid circulation loop could be arranged to include the first measurement pipeline and second
Measure pipeline.Wherein, in Fig. 1, schematically, the second measurement pipeline is shown in the top in figure, the first measurement pipeline phase
It is shown in adjacently below the second measurement pipeline.Mass flowmenter for measuring supercritical carbon dioxide mass flow includes first
Measure the measurement pipeline quality flowmeter 21 of pipeline quality flowmeter 15 and second；For measuring flowing of the fluid in measurement line sections
The differential pressure pickup of pressure difference includes the first measurement pipeline differential pressure pickup 22 and the second measurement pipeline differential pressure pickup 18；For surveying
The temperature sensor of amount temperature includes first/second measurement pipeline inlet temperature meter 16 and first/second measurement pipeline outlet temperature
Degree meter 19.Furthermore it is also possible to it is provided for measuring the pressure gauge of instantaneous pressure, as shown in figure 1, measuring pipeline in first/second
It is upper to set first/second to measure pipeline inlet pressure meter 17 and first/second measurement pipeline discharge gage 20 respectively.The increasing
Stick injection hybrid system includes tackifier storage tank 10, for measuring the thickening tackifier measuring pump 11 of dosage and dynamic for providing
The plunger pump 12 of power.Opening after tackifier entrance screws valve 13, plunger pump 12 is by the tackifier in tackifier storage tank 10
It is incorporated into supercritical carbon dioxide fracturing fluid circulation loop.Meanwhile the measurable thickening dosage of tackifier measuring pump 11.
Dioxide bottle 1, gas buffer tank 2 and gas is provided with the supercritical carbon dioxide pressure charging system to increase
Press pump 3.In operation, after opening carbon dioxide entrance screws valve 4, gas boosting pump 3 and the cooperation of circulating pump 9 will be located at two
Carbon dioxide in carbonoxide gas cylinder 1 is incorporated into supercritical carbon dioxide fracturing fluid circulation loop by gas buffer tank 2.Its
Middle gas buffer tank 2 is mainly used in stablizing air pressure and air-flow.
In a preferable scheme, visualization window is additionally provided with the supercritical carbon dioxide fracturing fluid circulation loop
Mouth 30.The admixture of supercritical carbon dioxide and tackifier can be observed by visual window 30, regulation pressure is provided for experiment
The foundation of power, temperature and tackifier injection rate.
Emptying surge tank 23 is additionally provided with the supercritical carbon dioxide fracturing fluid circulation loop.Need will be overcritical
When mixture in carbon dioxide pressure break liquid circulation loop is discharged, emptying can be opened screw valve 24 and be discharged, now
Emptying surge tank 23 can play a part of carrying out buffer-stored, and drastic change will not be occurred by ensureing the hydrodynamics in whole loop,
Prevent the destabilizing factor caused by discharge behavior.
The application also proposed a kind of method for measuring supercritical carbon dioxide fracturing fluid rheological characteristic.Using above-mentioned reality
Experiment device, when carrying out supercritical carbon dioxide fracturing fluid rheology tests：Adjustment carbon dioxide gas source inlet first screws
Valve 4, tackifier entrance screw valve 13 and the emptying of supercritical carbon dioxide fracturing fluid screws valve 24 so that three is in closing shape
State, the air in experiment pipeline is excluded using vavuum pump 5；Open carbon dioxide gas source inlet and screw valve 4 and circulating pump 9, make two
Carbonoxide enters supercritical carbon dioxide fracturing fluid circulation loop；Gas boosting pump 3 and oil bath heater 6 are adjusted, is by experiment
Temperature, the pressure of system are adjusted to the temperature, pressure of experiment setting；Open tackifier entrance and screw valve 13, the and of tackifier measuring pump 11
Plunger pump 12, the tackifier in tackifier storage tank 10 are pumped into supercritical carbon dioxide pressure break fluid circulation；Fluid (thickening
Agent, carbon dioxide) flowed in the presence of circulating pump 9, tackifier are completely dissolved in supercritical carbon dioxide in static mixer 14
In；After parameter stability, the measure of supercritical carbon dioxide fracturing fluid rheological characteristic is carried out：Pass through differential pressure pickup (such as Fig. 1 institutes
The first measurement pipeline differential pressure pickup 22 and the second measurement pipeline differential pressure pickup 18 in the embodiment shown) record fluid surveying
The flow differential pressure of buret line segment；By mass flowmenter (such as in the embodiment shown in Fig. 1 first measurement pipeline quality flow
The measurement pipeline quality flowmeter 21 of meter 15 and second) display supercritical carbon dioxide mass flow, surveyed by tackifier measuring pump
Amount thickening dosage, passes through temperature sensor measurement temperature；The supercritical carbon dioxide pressure break under design temperature, pressure is calculated
Liquid Rheology Constitutive Equation.Two measurement pipe line numbers according to can comparing calculation, average.
In experimentation, valve 4 (the first valve) is screwed by carbon dioxide gas source inlet and cooperated with gas boosting pump 3,
Control the pressure in amount of carbon dioxide and supercritical carbon dioxide fracturing fluid circulation loop；Valve 13 is screwed by tackifier entrance
(the second valve) and the Cooperation controlling of plunger pump 12 thickening dosage；Valve 24 (the 3rd valve) is screwed by emptying and discharges overcritical dioxy
Change the mixture in carbon fracturing fluid circulation loop；Supercritical carbon dioxide fracturing fluid circulation loop is controlled by oil bath heater 6
In temperature.Relative to prior art, the apparatus and method of the application can at least reach following beneficial effect：
(1) measurement of larger pressure and temperature wide-ultra critical carbon dioxide fracturing fluid rheological parameter can be realized, can
Obtain the constitutive relation of supercritical carbon dioxide pressure break liquid flow variation characteristic under different temperatures, pressure condition；
(2) static mixer 14 can be stirred under high pressure, realize being sufficiently mixed for tackifier and supercritical carbon dioxide.
The mixed effect of supercritical carbon dioxide and tackifier can be observed by visual window 30, regulation pressure, temperature are provided for experiment
With the foundation of tackifier injection rate；
(3) solubility of the different tackifier in supercritical carbon dioxide can be measured；
(4) device is simple to operate, and method is easy to implement, and feasibility is high；
(5) measuring method science, the parameter measurement of degree of precision can be realized.
Although by reference to preferred embodiment, invention has been described, is not departing from the situation of the scope of the present invention
Under, various improvement can be carried out to it and part therein can be replaced with equivalent.Especially, as long as being rushed in the absence of structure
Prominent, the every technical characteristic being previously mentioned in each embodiment can combine in any way.The invention is not limited in text
Disclosed in specific embodiment, but all technical schemes including falling within the scope of the appended claims.
Claims (10)
1. a kind of device for being used to measure supercritical carbon dioxide fracturing fluid rheological characteristic, described device include：
Supercritical carbon dioxide pressure charging system,
Tackifier inject hybrid system, and
Supercritical carbon dioxide fracturing fluid circulation loop,
Carbon dioxide can be input to the supercritical carbon dioxide fracturing fluid and follow by the supercritical carbon dioxide pressure charging system
In loop back path, and tackifier can be input to the supercritical carbon dioxide fracturing fluid and follow by tackifier injection hybrid system
In loop back path.
2. device according to claim 1, it is characterised in that the supercritical carbon dioxide pressure charging system passes through the first valve
Door is connected to the supercritical carbon dioxide fracturing fluid circulation loop, and the tackifier injection hybrid system is connected by the second valve
The supercritical carbon dioxide fracturing fluid circulation loop is connected to, the supercritical carbon dioxide fracturing fluid circulation loop is additionally provided with
The 3rd valve for exhaust mixture.
3. device according to claim 2, it is characterised in that in the supercritical carbon dioxide fracturing fluid circulation loop
In, it is provided with vavuum pump, circulating pump, oil bath heater, static mixer, the quality for measuring supercritical carbon dioxide mass flow
Flowmeter, for measure fluid measurement line sections flow differential pressure differential pressure pickup and for measurement temperature temperature pass
Sensor.
4. device according to claim 3, it is characterised in that the tackifier injection hybrid system is stored up including tackifier
Tank, the tackifier measuring pump for measuring thickening dosage and the plunger pump for providing power.
5. device according to claim 4, it is characterised in that be provided with the supercritical carbon dioxide pressure charging system
Dioxide bottle, gas buffer tank and gas booster pump.
6. device according to claim 5, it is characterised in that in the supercritical carbon dioxide fracturing fluid circulation loop also
It is provided with visualization window.
7. the method for measuring supercritical carbon dioxide fracturing fluid rheological characteristic, it is characterised in that methods described passes through according to power
Profit requires the device described in 6 to implement, and methods described comprises the following steps：
Carbon dioxide is input into the supercritical carbon dioxide fracturing fluid by the supercritical carbon dioxide pressure charging system to follow
In loop back path；
Gas boosting pump and oil bath heater are adjusted, the temperature of experimental system, pressure are adjusted to the temperature, pressure of experiment setting；
Hybrid system is injected by the tackifier, and tackifier are input to the supercritical carbon dioxide fracturing fluid circulation loop
In；
In the supercritical carbon dioxide fracturing fluid circulation loop so that the fluid-mixing of tackifier and supercritical carbon dioxide
Flowed down in circulation pumping action dynamic, and tackifier are dissolved in supercritical carbon dioxide with established standardses；
Flow differential pressure of the fluid in measurement line sections is recorded, supercritical carbon dioxide mass flow is recorded, measurement thickening dosage, surveys
Amount temperature；
The supercritical carbon dioxide fracturing fluid Rheology Constitutive Equation under design temperature, pressure is calculated.
8. according to the method for claim 7, it is characterised in that fluid is measured in measurement line sections by differential pressure pickup
Flow differential pressure, by mass flow meter measurement supercritical carbon dioxide mass flow, tackifier are measured by tackifier measuring pump
Amount, passes through temperature sensor measurement temperature.
9. according to the method for claim 8, it is characterised in that pass through the first Valve controlling amount of carbon dioxide and overcritical two
Pressure in carbonoxide fracturing fluid circulation loop, dosage is viscosified by the second Valve controlling, it is overcritical by the 3rd Valved discharge
Mixture in carbon dioxide pressure break liquid circulation loop, supercritical carbon dioxide fracturing fluid is controlled to be recycled back to by oil bath heater
Temperature in road.
10. according to the method for claim 9, it is characterised in that by visualization window observe supercritical carbon dioxide with
The admixture of tackifier, the foundation as regulation pressure, temperature and tackifier injection rate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610323527.7A CN107389504A (en) | 2016-05-16 | 2016-05-16 | For measuring the device and method of supercritical carbon dioxide fracturing fluid rheological characteristic |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108709826A (en) * | 2018-07-18 | 2018-10-26 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of carbon dioxide frictional resistance measuring device and method |
| CN112924371A (en) * | 2021-02-02 | 2021-06-08 | 上海交通大学 | Supercritical carbon dioxide stress corrosion experimental device and experimental method |
| CN113670974A (en) * | 2021-09-18 | 2021-11-19 | 天津大学合肥创新发展研究院 | Supercritical CO2Mixed working medium heat exchange experimental system |
| CN116429640A (en) * | 2023-05-31 | 2023-07-14 | 西安石油大学 | Method for testing resistance-reducing performance of small molecule recyclable self-cleaning fracturing fluid system |
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| CN116429640A (en) * | 2023-05-31 | 2023-07-14 | 西安石油大学 | Method for testing resistance-reducing performance of small molecule recyclable self-cleaning fracturing fluid system |
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