CN110044790A - A kind of measuring device and method of critical filling pressure - Google Patents
A kind of measuring device and method of critical filling pressure Download PDFInfo
- Publication number
- CN110044790A CN110044790A CN201910285310.5A CN201910285310A CN110044790A CN 110044790 A CN110044790 A CN 110044790A CN 201910285310 A CN201910285310 A CN 201910285310A CN 110044790 A CN110044790 A CN 110044790A
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- holding unit
- pressure
- measuring device
- core holding
- intermediate receptacle
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
Abstract
The present invention provides the measuring device and method of a kind of critical filling pressure, measuring device includes: micro constant-flux pump, intermediate receptacle, pressure sensor, monitoring modular, core holding unit;Wherein: core holding unit is used to clamp the impermeability object and rock core to be measured for calibration;Micro constant-flux pump is connected by one end of first pipe and intermediate receptacle, for injecting in intermediate receptacle the first liquid with preset flow velocity;The other end of intermediate receptacle is connect by second pipe with core holding unit, and for injecting second liquid into core holding unit, pressure sensor is connected between on the second pipe between container and core holding unit;Monitoring modular is electrically connected with pressure sensor, and the pressure of pressure sensor changes over time relationship when for clamping impermeability object and rock core to be measured in real-time monitoring core holding unit respectively.The present invention can quick, high-precision measurement rock core critical filling pressure, measurement result compares error very little with actual value.
Description
Technical field
The present invention relates to petroleum exploration fields, especially core parameters measuring technique, and in particular to a kind of critical filling pressure
The measuring device and method of power.
Background technique
Fine and close and low permeability reservoirs specific gravity shared in China's petroleum resources increases year by year, and critical filling pressure is this kind of
A key parameter in Hydrocarbon Accumulation research, but critical filling pressure can not be accurately measured in the prior art.In order to
Critical filling pressure is measured, proposes the method for closing on filling pressure using RLC bridge measurement, the base of this method in the prior art
Present principles are the rock cores of saturated water when there is oil to inject, and resistivity will increase, therefore the resistivity of rock core is measured by RLC electric bridge
Detect injection pressure when oil initially enters rock core, which is exactly critical filling pressure.But when oil initially enters rock core
When, to the change very little of rock core resistivity, and the relationship between the content and distribution and rock core resistivity of oil is there are multi-solution, because
This this method susceptibility is lower, and error is larger.
Summary of the invention
The embodiment of the present invention provides the measuring device and method of a kind of critical filling pressure, can solve existing measurement skill
Art susceptibility is lower, the larger problem of error, the present invention can it is quick, it is high-precision measurement rock core critical filling pressure,
Its measurement result compares error very little with actual value.
On the one hand, the embodiment of the invention provides a kind of measuring devices of critical filling pressure, comprising: micro constant-flux pump,
Intermediate receptacle, pressure sensor, monitoring modular, core holding unit;Wherein:
The core holding unit is used to clamp the impermeability object and rock core to be measured for calibration;
The micro constant-flux pump is connect by first pipe with one end of the intermediate receptacle, is used for the first liquid with pre-
If flow velocity inject in the intermediate receptacle;
The other end of the intermediate receptacle is connect by second pipe with the core holding unit, for pressing from both sides to the rock core
Second liquid is injected in holder, the pressure sensor is connected to described between the intermediate receptacle and the core holding unit
On second pipe;
The monitoring modular is electrically connected with the pressure sensor, is pressed from both sides for distinguishing in core holding unit described in real-time monitoring
The pressure of the pressure sensor changes over time relationship when holding impermeability object and rock core to be measured.
In one embodiment, intermediate receptacle is arranged along the vertical direction, wherein lower end is connect with the micro constant-flux pump, upper end
It is connected to the core holding unit.
In one embodiment, the first fluid density is greater than the second liquid density.
In one embodiment, the measuring device of critical filling pressure further includes container, and the container is connected by third pipeline
On the second pipe between the intermediate receptacle and the core holding unit, for accommodating the second liquid.
In one embodiment, the measuring device of critical filling pressure further includes vacuum pump, and the vacuum pump passes through the 4th pipeline
Connect the third pipeline.
In one embodiment, in the measuring device of critical filling pressure:
Valve is provided on the second pipe;
Valve is provided on the third pipeline;
Valve is provided on 4th pipeline.
In one embodiment, the measuring device of critical filling pressure further includes ring press pump, and the ring press pump passes through the 5th pipeline
It is connect with the core holding unit.
In one embodiment, the measuring device of critical filling pressure further include pressure gauge, the measuring device further includes pressure
Power table, the pressure gauge are arranged on the 5th pipeline.
On the other hand, the embodiment of the invention provides a kind of measurement methods of critical filling pressure, this method comprises:
The impermeability object is packed into the core holding unit;
After adding confining pressure to preset value to the core holding unit, the micro constant-flux pump is opened, with the flow velocity of setting to institute
Intermediate receptacle is stated to be filled until preset time;
The pressure that the monitoring modular records the pressure sensor changes with time relation curve, bent as calibration
Line;
The rock core to be measured is packed into the core holding unit;
After adding confining pressure to the preset value to the core holding unit, the micro constant-flux pump is opened, with the setting
Flow velocity the intermediate receptacle is filled until the preset time;
The pressure that the monitoring modular records the pressure sensor changes with time relationship, as experiment curv;
The calibration curve and experiment curv are compared, the critical filling pressure is obtained.
In one embodiment, the impermeability object is being packed into the core holding unit and is filling the rock core to be measured
Before entering the core holding unit, further includes:
Vacuum pump is opened, the intermediate receptacle and the second pipe connecting with the intermediate receptacle and third pipeline are taken out true
Sky makes the second liquid in beaker enter the intermediate receptacle and the second pipe connecting with the intermediate receptacle and institute
It states in third pipeline.
In one embodiment, the pressure that the monitoring modular records the pressure sensor changes with time relation curve,
Include:
To preset sampling time interval, the pressure for recording the pressure sensor changes with time pass the monitoring modular
It is curve.
As can be seen from the above description, the present invention provides the measuring device and method of a kind of critical filling pressure, can solve existing
Have measuring technique susceptibility lower, the larger problem of error, the present invention can quick, high-precision measurement the critical of rock core fill
Injection pressure power, measurement result and actual value compare error very little.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the structural schematic diagram of the measuring device of the critical filling pressure in the embodiment of the present invention.
Fig. 2 is the flow diagram of the measurement method of the critical filling pressure provided in the embodiment of the present invention.
Fig. 3 is calibration curve provided in an embodiment of the present invention and experiment curv contrast schematic diagram.
Fig. 4 is the partial enlargement diagram of Fig. 3.
Fig. 5 is the flow diagram of the specific application example of the measurement method of critical filling pressure of the invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of measuring device specific embodiment of critical filling pressure, described referring to Fig. 1
The measuring device of critical filling pressure specifically includes following content:
The measuring device includes: micro constant-flux pump 1, intermediate receptacle 4, pressure sensor 11, monitoring modular 12, rock core clamping
Device 13, in which:
The core holding unit 13 is used to clamp the impermeability object and rock core to be measured for calibration;
In a kind of specific citing, impermeability object can choose the stainless steel that shape is cylinder.
The micro constant-flux pump 1 is connect by first pipe 16 with one end of the intermediate receptacle 4, is used for the first liquid
21 are injected in the intermediate receptacle 4 with preset flow velocity;
In a kind of specific citing, preset flow velocity can be 0.02ml/min;First liquid 21 can for water or its
His non-compressible liquid.
The other end of the intermediate receptacle 4 is connect by second pipe 17 with the core holding unit 13, is used for described
Second liquid 22 is injected in core holding unit 13, the pressure sensor 11 is connected to the intermediate receptacle 4 and presss from both sides with the rock core
On the second pipe 17 between holder 13;
In a kind of specific citing, the setting of 4 direction of intermediate receptacle are as follows:
The part direction that intermediate receptacle 4 is connect with the micro constant-flux pump 1 is downward, the intermediate receptacle 4 and the rock core
The part direction that clamper 13 is connected to is upward.
In a kind of specific citing, second liquid 22 can be kerosene or other oil type liquids.
The monitoring modular 12 is electrically connected with the pressure sensor 11, for distinguishing core holding unit described in real-time monitoring
The pressure of the pressure sensor 11 changes over time relationship when clamping impermeability object and rock core to be measured in 13.
In a kind of specific citing, the capacity of intermediate receptacle 4 can be 200ml.
The measuring device further includes container 6, the container 6 by third pipeline 18 be connected to the intermediate receptacle 4 with
On the second pipe 17 between the core holding unit 13, for accommodating the second liquid 22.
In a kind of specific citing, container 6 can be a beaker, such as the beaker of 10 × 10cm, long 25cm, wall thickness
It can be 5mm, beaker is provided with kerosene, and the density of kerosene can be 0.896g/cc.
The measuring device further includes vacuum pump 7, and the vacuum pump 7 connects the third pipeline by the 4th pipeline 19
18。
Valve 9 is provided on the second pipe 17;
Valve 5 is provided on the third pipeline 18;
Valve 8 is provided on 4th pipeline 19.
The measuring device further includes ring press pump 15, and the ring press pump 15 passes through the 5th pipeline 20 and the core holding unit
13 connections.
The measuring device further includes pressure gauge 14, and the pressure gauge 14 is arranged on the 5th pipeline 20.
As can be seen from the above description, the present invention provides a kind of measuring device of critical filling pressure, existing measurement can solve
Technology susceptibility is lower, the larger problem of error, and the present invention can quick, the high-precision critical filling pressure for measuring rock core
Power, measurement result and actual value compare error very little.
The embodiment of the present invention provides a kind of specific embodiment of the measurement method of critical filling pressure, referring to fig. 2, institute
The measurement method for stating critical filling pressure specifically includes following content:
Step 100: the impermeability object is packed into the core holding unit;
It is understood that the leakproofness of measuring device should be checked before measuring critical filling pressure duty and starting,
Specifically: micro constant-flux pump is opened, stainless steel cylinder is packed into core holding unit, opens monitoring modular and pressure sensor, it is right
Measuring device carries out being forced into preset value, closes micro constant-flux pump, by pressure sensor and monitoring modular check pressure whether there is or not
Relaxation phenomenon;In a kind of specific citing, preset value can be 10MPa.
Step 200: after adding confining pressure to preset value to the core holding unit, the micro constant-flux pump is opened, with setting
Flow velocity fills until preset time the intermediate receptacle;
It is understood that adding confining pressure to core holding unit, in order to simulate subsurface pressure environment, preset value should
It is consistent according to strata pressure where rock core to be measured, can be 25MPa in a kind of specific citing.Preset time should
Not less than 6400s.
Step 300: the pressure that monitoring modular records the pressure sensor changes with time relation curve, as calibration
Curve;
Step 400: the rock core to be measured is packed into the core holding unit;
It is understood that before step 100 and step 400, further includes:
Vacuum pump is opened, the intermediate receptacle and the second pipe connecting with the intermediate receptacle and third pipeline are taken out true
Sky makes described second that the second liquid in the container enters the intermediate receptacle and connect with the intermediate receptacle
In pipeline and the third pipeline.
According to rock core quantity to be measured, rock core to be measured successively can be packed into core holding unit, to measure multiple rock cores to be measured.
Step 500: after adding confining pressure to the preset value to the core holding unit, the micro constant-flux pump is opened, with
The flow velocity of the setting fills until the preset time intermediate receptacle;
Step 600: the pressure that the monitoring modular records the pressure sensor changes with time relationship, as measurement
Curve;
It is understood that monitoring modular records the pressure of the pressure sensor at any time to preset sampling time interval
Between variation relation curve, in a kind of specific citing, sampling time interval can be 5s.
Step 700: comparing the calibration curve and experiment curv, obtain the critical filling pressure.
As can be seen from the above description, the embodiment of the present invention provides a kind of measurement method of critical filling pressure, can solve
Existing measuring technique susceptibility is lower, the larger problem of error, and the present invention quick, high-precision can measure the critical of rock core
Pressure is filled, measurement result compares error very little with actual value.
To further explain this programme, the present invention also provides a kind of concrete applications of the measurement method of critical filling pressure
Example, with reference to Fig. 3, Fig. 4 and Fig. 5.The specific application example of the measurement method of the critical filling pressure specifically includes in following
Hold:
It is understood that each of measurement method of critical filling pressure measurement data is one in Fig. 3 and Fig. 4
A data point, but due in Fig. 3 data point it is very more, be particularly shown in figure as a line.
S0: opening micro constant-flux pump 1, and stainless steel cylinder is packed into core holding unit 13, opens monitoring modular 12 and pressure
Sensor 11 carries out measuring device to be forced into 10MPa, stops micro constant-flux pump 1, passes through pressure sensor 11 and monitoring modular
12 check pressure, and whether there is or not relaxation phenomenons, and after inspection, Open valve 10 unloads measuring device pressure.
S1: open vacuum pump 7, Open valve 5, valve 8, close valve 10, by the intermediate receptacle 4 and with the centre
The second pipe 17 and third pipeline 18 that container 4 connects vacuumize, and the second liquid 22 in container 6 is made to enter the intermediate appearance
In device 4 and the second pipe 17 being connect with the intermediate receptacle 4 and the third pipeline 18.
S2: closing valve 3, valve 5, valve 8, Open valve 2 and valve 9, adds confining pressure extremely to the core holding unit 13
After 25MPa, the micro constant-flux pump 1 is opened, the intermediate receptacle 4 is filled to 6400s with the flow velocity of 0.02ml/min
Until;
S3: with sampling time interval 5s, the pressure for recording pressure sensor 11 changes with time relationship monitoring modular 12
Curve, as calibration curve, Open valve 10 unloads measuring device pressure;
S4: open vacuum pump 7, Open valve 5, valve 8, close valve 10, by the intermediate receptacle 4 and with the centre
The second pipe 17 and third pipeline 18 that container 4 connects vacuumize, and the second liquid 22 in container 6 is made to enter the intermediate appearance
In device 4 and the second pipe 17 being connect with the intermediate receptacle 4 and the third pipeline 18.
S5: the rock core 1 to be measured is packed into the core holding unit 13, and closes valve 10;
S6: after the core holding unit 13 plus confining pressure to 25MPa, the micro constant-flux pump 1 is opened, with 0.02ml/min's
Flow velocity fills until 6400s the intermediate receptacle;
S7: the monitoring modular 12 records the pressure of the pressure sensor 11 at any time with sampling time interval 5s
Variation relation, as experiment curv;
S8: Open valve 10 unloads measuring device pressure, the rock core 2 to be measured is packed into the core holding unit 13;
S9: after the core holding unit 13 plus confining pressure to 25MPa, the micro constant-flux pump 1 is opened, with 0.02ml/min's
Flow velocity fills until 6400s the intermediate receptacle;
S10: the monitoring modular 12 records the pressure of the pressure sensor 11 at any time with sampling time interval 5s
Variation relation, as experiment curv;
S11: comparing the calibration curve and experiment curv, obtains the critical filling pressure of two blocks of rock cores, 1 He of rock core
Rock core 2 critical filling pressure is respectively 1.66MPa (referring to the A point in Fig. 3) and 0.22MPa (referring to the B in Fig. 3 and Fig. 4
Point).
As can be seen from the above description, the present invention provides the measuring device and method of a kind of critical filling pressure, can solve existing
Have measuring technique susceptibility lower, the larger problem of error, the present invention can quick, high-precision measurement the critical of rock core fill
Injection pressure power, measurement result and actual value compare error very little.
It is above-mentioned that this specification specific embodiment is described.Other embodiments are in the scope of the appended claims
It is interior.In some cases, the movement recorded in detail in the claims or step can be come according to the sequence being different from embodiment
It executes and desired result still may be implemented.In addition, process depicted in the drawing not necessarily require show it is specific suitable
Sequence or consecutive order are just able to achieve desired result.
Although this specification embodiment provides the method operating procedure as described in embodiment or flow chart, based on conventional
It may include either more or less operating procedure without creative means.The step of being enumerated in embodiment sequence be only
One of numerous step execution sequence mode does not represent and unique executes sequence.Device or end product in practice is held
When row, can be executed according to embodiment or method shown in the drawings sequence or it is parallel execute (such as parallel processor or
The environment of multiple threads, even distributed data processing environment).The terms "include", "comprise" or its any other change
Body is intended to non-exclusive inclusion, so that process, method, product or equipment including a series of elements are not only wrapped
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, product
Or the element that equipment is intrinsic.In the absence of more restrictions, being not precluded is including process, the side of the element
There is also other identical or equivalent elements in method, product or equipment.
The foregoing is merely the embodiments of this specification embodiment, are not limited to this specification embodiment.It is right
For those skilled in the art, this specification embodiment can have various modifications and variations.It is all in this specification embodiment
Any modification, equivalent replacement, improvement and so within spirit and principle, the right that should be included in this specification embodiment are wanted
Within the scope of asking.
Claims (11)
1. a kind of measuring device of critical filling pressure characterized by comprising micro constant-flux pump, intermediate receptacle, pressure sensing
Device, monitoring modular, core holding unit;Wherein:
The core holding unit is used to clamp the impermeability object and rock core to be measured for calibration;
The micro constant-flux pump is connect by first pipe with one end of the intermediate receptacle, is used for the first liquid with preset
Flow velocity injects in the intermediate receptacle;
The other end of the intermediate receptacle is connect by second pipe with the core holding unit, is used for the core holding unit
Middle injection second liquid, the pressure sensor are connected to described second between the intermediate receptacle and the core holding unit
On pipeline;
The monitoring modular is electrically connected with the pressure sensor, for distinguish clamped in core holding unit described in real-time monitoring it is non-
The pressure of the pressure sensor changes over time relationship when permeability object and rock core to be measured.
2. measuring device according to claim 1, which is characterized in that the intermediate receptacle is arranged along the vertical direction, wherein
Lower end is connect with the micro constant-flux pump, and upper end is connected to the core holding unit.
3. measuring device according to claim 1, which is characterized in that first fluid density is greater than the second liquid
Density.
4. measuring device according to claim 1, which is characterized in that the measuring device further includes container, the container
It is connected on the second pipe between the intermediate receptacle and the core holding unit by third pipeline, for accommodating
State second liquid.
5. measuring device according to claim 4, which is characterized in that the measuring device further includes vacuum pump, described true
Sky pump connects the third pipeline by the 4th pipeline.
6. measuring device according to claim 5, which is characterized in that
Valve is provided on the second pipe;
Valve is provided on the third pipeline;
Valve is provided on 4th pipeline.
7. measuring device according to claim 1, which is characterized in that the measuring device further includes ring press pump, the ring
Press pump is connect by the 5th pipeline with the core holding unit.
8. measuring device according to claim 1, which is characterized in that the measuring device further includes pressure gauge, the pressure
Power table is arranged on the 5th pipeline.
9. the side that a kind of measuring device using any one of the claim 1-8 critical filling pressure measures critical filling pressure
Method characterized by comprising
The impermeability object is packed into the core holding unit;
After adding confining pressure to preset value to the core holding unit, the micro constant-flux pump is opened, with the flow velocity of setting in described
Between container filled until preset time;
The pressure that the monitoring modular records the pressure sensor changes with time relation curve, as calibration curve;
The rock core to be measured is packed into the core holding unit;
After adding confining pressure to the preset value to the core holding unit, the micro constant-flux pump is opened, with the stream of the setting
Speed fills until the preset time intermediate receptacle;
The pressure that the monitoring modular records the pressure sensor changes with time relationship, as experiment curv;
The calibration curve and experiment curv are compared, the critical filling pressure is obtained.
10. according to the method described in claim 9, it is characterized in that, being pressed from both sides the impermeability object is packed into the rock core
Holder and the rock core to be measured is packed into before the core holding unit, further includes:
Vacuum pump is opened, the intermediate receptacle and the second pipe connecting with the intermediate receptacle and third pipeline are vacuumized,
Second pipe for making the second liquid in the container enter the intermediate receptacle and connect with the intermediate receptacle
In road and the third pipeline.
11. according to the method described in claim 9, it is characterized in that, the monitoring modular records the pressure of the pressure sensor
Power changes with time relation curve, comprising: the monitoring modular records the pressure sensor to preset sampling time interval
Pressure change with time relation curve.
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CN201910285310.5A CN110044790B (en) | 2019-04-10 | 2019-04-10 | Device and method for measuring critical filling pressure |
AU2020202464A AU2020202464B2 (en) | 2019-04-10 | 2020-04-09 | Apparatus and method for measuring critical filling pressure |
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Cited By (1)
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CN110044789A (en) * | 2019-04-10 | 2019-07-23 | 东北石油大学 | A kind of minimum measuring device and method for starting pressure and pressure-wave emission rate |
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Also Published As
Publication number | Publication date |
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AU2020202464A1 (en) | 2020-10-29 |
CN110044790B (en) | 2020-06-19 |
AU2020202464B2 (en) | 2021-03-11 |
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