CN109856030A - The determination method of imbibition experimental provision and imbibition recovery percent of reserves - Google Patents
The determination method of imbibition experimental provision and imbibition recovery percent of reserves Download PDFInfo
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- 238000005213 imbibition Methods 0.000 title claims abstract description 240
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000011084 recovery Methods 0.000 title claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 230000005484 gravity Effects 0.000 claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 238000013480 data collection Methods 0.000 claims abstract description 14
- 239000011435 rock Substances 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 21
- 230000008859 change Effects 0.000 claims description 20
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 14
- 239000003921 oil Substances 0.000 description 64
- 235000019198 oils Nutrition 0.000 description 63
- 239000010779 crude oil Substances 0.000 description 16
- 230000008569 process Effects 0.000 description 14
- 239000004615 ingredient Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 5
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- 239000000243 solution Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
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- 238000005516 engineering process Methods 0.000 description 4
- 235000019476 oil-water mixture Nutrition 0.000 description 4
- 238000007667 floating Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 235000013399 edible fruits Nutrition 0.000 description 2
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- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
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- 239000000203 mixture Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The present invention provides a kind of imbibition experimental provision and the determination methods of imbibition recovery percent of reserves, it is related to imbibition field, experimental provision includes: imbibition bottle, imbibition bottle is provided with water and core sample, imbibition bottle has open end, open end is provided with test tube, and test tube indicates graduation mark from upper end to lower end, and the water level in imbibition bottle is not less than test tube the lowermost graduation mark；Minute-pressure pump, minute-pressure pump is for providing the water of predetermined pressure into imbibition bottle；The hanger of core sample is hung, hanger is placed on gravity sensing device, and gravity sensing device is electrically connected data collection system；Wherein, imbibition bottle is provided with water inlet, and water inlet is pumped with minute-pressure and connect by attachment device, and attachment device includes: hydraulic control valve, when hydraulic control valve detect two sides pressure it is unequal when, in opened condition；When hydraulic control valve detect two sides pressure it is equal when, it is in closed state.Imbibition experimental provision provided by the invention is easy to assembly, and measurement accuracy is high, applied widely.
Description
Technical field
The present invention relates to the imbibition fields in petroleum works, and in particular to a kind of imbibition experimental provision and imbibition produce journey
The determination method of degree.
Background technique
Fine and close shale oil hiding belongs to non-conventional oil resource type, and more preservations are in the unconventional storage such as low-porosity, low-permeability
Layer.Due to the long period of soaking of water flooding, subsurface rock all shows hydrophilic characteristic.When water-oil phase coexists in blowhole
In, due to the difference of wettability, so that oil-water interfaces are in meniscus.Meniscus pressure at both sides is unequal, and oily phase pressure is higher than water
For phase pressure to form pressure difference, the active force formed by the pressure difference is capillary force, under the action of capillary force, water
Mother oil displacement will be come out into blowhole, as imbibition process.
Currently, imbibition effect becomes the important mechanism of research compact oil reservoir and low-permeability oil deposit.In research densification, hypotonic rock
When imbibition acts on, need to measure imbibition oil production.In the prior art, the method for oil production generallys use rock during metering imbibition
Heart weight method, this method are to hang rock to immerse in water flooding, and rock and day flushconnection utilize rock gravity, buoyancy and day
Flat three power stress balance of holding power, by read balance data can seek the Gravity changer during rock imbibition, by into
One step calculates, and obtains oil production.
Using this method in measurement process, imbibition oil production is not intuitive enough, and the oil film volume that imbibition goes out can not be counted directly
Amount.In addition, it has been found that with imbibition process progress, rock is gradually placed in the mixed solution of water flooding and crude oil, molten
The density of liquid is gradually reduced, and the overall volume of solution is constant, so that buoyancy suffered by rock is gradually reduced, and the variation of the buoyancy
It influences not measuring caused by measurement result, leading to measurement result, there is a certain error.Meanwhile with imbibition process into
Row, water flooding are constantly volatilized, and buoyancy suffered by rock changes with the volatilization of water flooding, but also measurement result is not smart enough
Really.
It should be noted that the above description of the technical background be intended merely to it is convenient technical solution of the present invention is carried out it is clear, complete
Whole explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes in back of the invention
Scape technology segment is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Summary of the invention
To achieve the above object, this application provides a kind of imbibition experimental provisions, and measuring accuracy is high, and easy to operate,
It can be quantified using the device, qualitatively obtain under different experimental conditions oil production during imbibition and its change with time.
Technical solution is as follows:
A kind of imbibition experimental provision, comprising: imbibition bottle, the imbibition bottle have hollow cavity, and the hollow cavity is built-in
There are water and core sample, the imbibition bottle has an open end, and the open end is provided with test tube, and the test tube has opposite upper
End and lower end, indicate graduation mark from the upper end to the lower end, and the water level in the imbibition bottle is most lower not less than the test tube
The graduation mark at end；Minute-pressure pump, the minute-pressure pump is for providing the water of predetermined pressure into the imbibition bottle；Hang the core sample
The hanger of product, the hanger are placed on gravity sensing device, and the gravity sensing device is electrically connected data collection system；Its
In, the imbibition bottle is provided with water inlet, and the water inlet is pumped with the minute-pressure and connect by attachment device, the attachment device
Include: hydraulic control valve, when the hydraulic control valve detect two sides pressure it is unequal when, in opened condition；When the liquid
It is in closed state when pressure control valve detects that the pressure of two sides is equal.
As a preferred embodiment, the imbibition experimental provision further include: siphon guide and beaker, the siphon
Conduit has opposite both ends, and one end is connected to the imbibition bottle, and the other end is connected to the beaker.
As a preferred embodiment, switch controlling device is provided on the siphon guide, the switch control
Device is specially the regulating valve that can change aperture.
As a preferred embodiment, the siphon guide has suction casing, the suction casing is located at the imbibition
In bottle, several apopores are provided on the suction casing.
As a preferred embodiment, the imbibition experimental provision further include: insulating box, the insulating box is for adjusting
Save the temperature of the imbibition bottle.
A kind of imbibition recovery percent of reserves based on the imbibition experimental provision determines method, which comprises receives institute
State the height of imbibition bottle water inlet to liquid level top；The predetermined pressure of the minute-pressure pump is determined according to the height；Described in reception
The first data that gravity sensing device measures；The minute-pressure pump is opened, receives the gravity sensing device measures second
Data；According to first data, the second data, the density of water, the density of oil, the volume of imbibition water displacement oil is determined；According to
Volume, core oil saturation, core porosity, rock core length and the core diameter of the imbibition water displacement oil determine that imbibition is adopted
Degree out.
As a preferred embodiment, the calculation formula of the imbibition recovery percent of reserves are as follows:
In formula,
Wherein, S0Indicate core oil saturation, unit %；
Φ is expressed as core porosity, unit %；
L is expressed as rock core length, unit cm；
D is expressed as core diameter, unit cm；
miIt is expressed as core sample quality described in the i moment, unit g；
m0It is expressed as the initial core sample quality, unit g；
RiIt is expressed as the imbibition recovery percent of reserves of core sample described in the i moment, unit %；
ρwIt is expressed as the density of injection water, unit g/cm3；
ρoIt is expressed as the density of oil, unit g/cm3；
Δ V is expressed as volume of the i moment relative to initial time imbibition water displacement oil, unit cm3。
As a preferred embodiment, the Δ V in the imbibition recovery percent of reserves calculation formula, moreover it is possible to by reading institute
The graduation mark stated on imbibition bottle obtains.
As a preferred embodiment, the predetermined pressure that the minute-pressure pump is determining are as follows:
P=ρwg(Hi+A)
Wherein,
A is expressed as the water inlet of the imbibition bottle to the height of oil water surface, unit mm；
G is expressed as acceleration of gravity, unit m/s2；
HiIt is expressed as the height of oil, unit mm；
ρwIt is expressed as the density of injection water, unit g/cm3。
As a preferred embodiment, the minute-pressure pump sets deviation as 1Pa, imbibition water in bottle position rises
The accuracy of height is 0.1mm.
Imbibition experimental provision provided by the invention has the following advantages and features: the imbibition experimental provision is micro- by being provided with
Press pump, minute-pressure pump is set with predetermined pressure, and when the hydraulic pressure suffered by the core sample reduces, minute-pressure pump can timely be imbibition
It is predetermined can to guarantee that hydraulic pressure suffered by core sample maintains always to keep the hydraulic pressure in imbibition bottle constant for supplement water in bottle
Pressure.The buoyancy as suffered by core sample is equivalent to the gravity for the oil water mixture that core sample arranges, i.e. FIt is floating=ρLiquidgVRow=ρLiquid
ghLiquidS=FPressure, by keeping predetermined pressure suffered by core sample, and then core sample can be guaranteed in imbibition during institute
It is constant by buoyancy.Therefore it when the hydraulic pressure in imbibition bottle reduces, is pumped by minute-pressure to imbibition bottle and supplements water, can guarantee core sample
Buoyancy suffered by product is constant, so as to avoid because buoyancy variation on gravity sensing device reading caused by influence, improve metering knot
The accuracy of fruit.
In imbibition experimental provision provided by the invention, for measuring the gravity sensing device and number of core sample mass change
It is electrically connected according to acquisition system, data collection system records gravity sensing device in real time, and the data collection system is automatic
The variation of gravity sensing device measurement data is recorded, it is time saving and energy saving, reduce workload.
By the way that the data that gravity sensing device measures are recorded and analyzed, the volume of crude oil output can be calculated.
Meanwhile graduation mark is provided on the imbibition bottle in the imbibition experimental provision, on output oil swims on water face, the graduation mark can be passed through
The volume of output oil is directly read and recorded, so as to verify to calculated crude oil volume, improves calculated result
Accuracy.Imbibition recovery percent of reserves can be further calculated out by obtained crude oil volume, the parameter is practical for estimation to be caused
The imbibition exploitation effect of close reservoir and the recovery ratio for improving compact reservoir have important directive significance.
Referring to following description and accompanying drawings, specific implementations of the present application are disclosed in detail, specify the original of the application
Reason can be in a manner of adopted.It should be understood that presently filed embodiment is not so limited in range.In appended power
In the range of the spirit and terms that benefit requires, presently filed embodiment includes many changes, modifications and is equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
Fig. 1 is the imbibition experimental provision structural schematic diagram in the application embodiment.
Description of symbols:
1, minute-pressure pumps；2, water container；3, pipeline；4, hydraulic control valve；5, imbibition bottle；6, imbibition output oil；7, copper wire；8,
Core sample；9, siphon guide；10, beaker；11, hanger；12, precision electronic balance；13, data line；14, data acquisition system
System；15, insulating box；16, imbibition bottom of bottle lid.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, elaborate to technical solution of the present invention, it should be understood that these
Embodiment is merely to illustrate the present invention rather than limitation range, after the present invention has been read, those skilled in the art couple
The modification of various equivalent forms of the invention is each fallen in the application range as defined in the appended claims.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", "upper",
"lower", "left", "right" and similar statement for illustrative purposes only, are not meant to be the only embodiment.
The application embodiment provides a kind of imbibition experimental provision, referring to Fig. 1, the imbibition experimental provision includes: to seep
Bottle 5 is inhaled, the imbibition bottle 5 has hollow cavity, and the hollow cavity is provided with water and core sample 8, and the imbibition bottle 5 has
Open end, the open end are provided with test tube, and the test tube has opposite top and bottom, from the upper end to the lower end
Graduation mark is indicated, the water level in the imbibition bottle 5 is not less than test tube the lowermost graduation mark；Minute-pressure pump 1, the minute-pressure pump
1 for providing the water of predetermined pressure into the imbibition bottle 5；The hanger 11 of the core sample 8 is hung, the hanger 11 is placed
On gravity sensing device, the gravity sensing device is electrically connected data collection system 14；Wherein, the imbibition bottle 5 is arranged
There is water inlet, the water inlet is connect with minute-pressure pump 1 by attachment device, and the attachment device includes: hydraulic control valve
4, when the hydraulic control valve 4 detect two sides pressure it is unequal when, in opened condition；When the hydraulic control valve 4 detects
It is in closed state when pressure to two sides is equal.
Imbibition experimental provision provided by the invention has the following advantages and features: the imbibition experimental provision is micro- by being provided with
Press pump 1, minute-pressure pump 1 are set with predetermined pressure, and when the hydraulic pressure suffered by the core sample reduces, minute-pressure pump 1 can timely be
Supplement water can guarantee that hydraulic pressure suffered by core sample 8 maintains always to keep the hydraulic pressure in imbibition bottle 5 constant in imbibition bottle
In predetermined pressure.The buoyancy as suffered by core sample 8 is equivalent to the gravity for the oil water mixture that core sample 8 arranges, i.e. FIt is floating=
ρLiquidgVRow=ρLiquidghLiquidS=FPressure, by keeping predetermined pressure suffered by core sample 8, and then can guarantee that core sample 8 exists
Suffered buoyancy is constant during imbibition.Therefore it when the hydraulic pressure in imbibition bottle 5 reduces, is supplemented by minute-pressure pump 1 to imbibition bottle 5
Water can guarantee that buoyancy suffered by core sample 8 is constant, caused by reading because of buoyancy variation to gravity sensing device
It influences, improves the accuracy of metric results.
In imbibition experimental provision provided by the invention, for measure the gravity sensing device of 8 mass change of core sample with
Data collection system 14 is electrically connected, and data collection system 14 records gravity sensing device in real time, data acquisition system
System 14 automatically records the variation of gravity sensing device measurement data, time saving and energy saving, reduces workload.
By the way that the data that gravity sensing device measures are recorded and analyzed, the volume of crude oil output can be calculated.
Meanwhile graduation mark is provided on the imbibition bottle 5 in the imbibition experimental provision, on output oil swims on water face, the scale can be passed through
Line directly reads and records the volume of output oil, so as to verify to calculated crude oil volume, improves calculating knot
The accuracy of fruit.Imbibition recovery percent of reserves can be further calculated out by obtained crude oil volume, the parameter is practical for estimation
The imbibition exploitation effect of compact reservoir and the recovery ratio for improving compact reservoir have important directive significance.
The imbibition bottle 5 is the transparent vessel for containing formation water and core sample 8, with hollow cavity knot
Structure, the imbibition bottle 5 have opposite top and bottom, are provided with water inlet at imbibition bottom of bottle lid 16 in lower end, from
And it can be more advantageous to the hydraulic pressure in 1 control imbibition bottle 5 of minute-pressure pump, the upper end of the imbibition bottle 5 is in open-like shape.Specifically, institute
Stating imbibition bottle 5 includes main paragraph, and the main paragraph can be to be cylindric, and inside is equipped with core sample 8 and water.The imbibition bottle 5
Upper end be provided with open end, be provided with test tube at the open end, the test tube has opposite top and bottom, described in
Upper end to the lower end indicates graduation mark, and the water level in the imbibition bottle 5 is not less than test tube the lowermost graduation mark.It is described
Changeover portion can be set between main paragraph and the test tube, the changeover portion has opposite upper/lower terminal, the changeover portion
Upper end and the test tube it is in mating connection, the lower end of the changeover portion and the main paragraph are in mating connection, the changeover portion
Tapered structure.
With the propulsion of imbibition process, slowly output crude oil in core sample 8, since the density of imbibition output oil 6 is less than
Water, imbibition output oil 6 will float on the surface of water.When the water level in imbibition bottle 5 is not less than test tube the lowermost graduation mark, imbibition
Output oil 6 can float at the graduation mark of imbibition bottle 5, can be directly read by the graduation mark and record imbibition output oil 6
Volume.In order to preferably further discriminate between water and imbibition output oil 6, the water infused can be blue, and the color filled the water certainly is not
Make specific restriction, can reach and be distinguished with output oil.The yield of output oil is smaller and production rate is slower, test tube
Diameter do not answer it is excessive, so as to more accurately read.By being provided with graduation mark on test tube, in the process of imbibition oil-producing
In, it can intuitively observe the amount and production rate of oil-producing, while the difference in height by reading pasta, can show that imbibition produces
Oil volume.
Minute-pressure pump 1 is specially constant pressure pump, is provided with water container 2, so as to provide water for the water inlet of imbibition bottle 5,
The water body is specifically as follows water flooding.In use, minute-pressure pumps 1 pre-set predetermined pressure, so as to control water outlet pressure
Power.The water inlet of the imbibition bottle 5 is connect with minute-pressure pump 1 by attachment device, and the attachment device includes: hydraulic control
Valve 4, when the hydraulic control valve 4 detect two sides pressure it is unequal when, in opened condition；When the hydraulic control valve 4 is examined
Measure two sides pressure it is equal when, it is in closed state.
Specifically, minute-pressure pump 1 can be attached with imbibition bottle 5 by pipeline 3, hydraulic control is provided on the pipeline 3
Valve 4 processed.When the reduction of 5 internal cause moisture content of imbibition bottle or the influence of output oil cause liquid volume and liquid property in bottle to change
When change, the pressure of 4 two sides of hydraulic control valve is unequal, that is, the hydraulic and minute-pressure pump 1 acted at hydraulic control valve 4 is set
It is unequal to determine predetermined pressure, in opened condition, minute-pressure pump 1 supplements moisture content for imbibition bottle 5 to hydraulic control valve 4, until hydraulic control
The pressure of 4 two sides of valve is equal, and hydraulic control valve 4 is closed, and water supply terminates.
In the present embodiment, the imbibition experimental provision further include: siphon guide 9 and beaker 10, the siphon guide 9
With opposite both ends, one end is connected to the imbibition bottle 5, and the other end is connected to the beaker 10.
Specifically, the siphon guide 9 can be plastic material, specific material is not construed as limiting.Its with opposite both ends,
One end is connected to imbibition bottle 5, water outlet can be set on imbibition bottle 5, the diameter of the water outlet is straight with the siphon guide 9
Diameter size matches, which can carry out seamless connection with siphon guide 9, to prevent water from leaking out.
The siphon guide 9 further can have suction casing, and the suction casing is located in imbibition bottle 5, the sucking
Several apopores can be set in section, so as to simulate the perforation of well, can further simulate the mobility status of water.Institute
Stating siphon guide 9 can slowly export the water in imbibition bottle 5, so that core sample 8 is placed in dynamic water flow, it is real
Now dynamic imbibition process more can be simulated really and be lauched the imbibition process of displacement crude oil in compact oil reservoir environment.Work as imbibition
When 5 internal cause 9 outflow water of siphon guide of bottle, water in bottle pressure reduces, and the pressure of 4 two sides of hydraulic control valve is unequal, hydraulic control valve 4
In opened condition, minute-pressure pump 1 supplements moisture content for imbibition bottle 5, until the pressure of 4 two sides of hydraulic control valve is equal, hydraulic control valve 4
It closes, water supply terminates.
In one embodiment, switch controlling device, the switch controlling device tool are provided on the siphon guide 9
Body is the regulating valve that can change aperture.By changing the opening size of the regulating valve, water velocity can be controlled, and then can adjust
Save the dynamic water velocity during dynamic imbibition.In addition, water body is in stationary state when closing the regulating valve, analog is quiet
State imbibition process, when opening the regulating valve, it can be achieved that the simulation of dynamic imbibition process.
In the present embodiment, the water level when minute-pressure pump 1 provides water into the imbibition bottle 5, in the imbibition bottle 5
Lifting height are as follows:
Wherein, h is expressed as water level lifting height, unit mm；
HiIt is expressed as the height of oil, unit mm；
ρwIt is expressed as the density of injection water, unit g/cm3；
ρoIt is expressed as the density of oil, unit g/cm3。
Specifically, water energy is enough gradually to replace out by the crude oil in core sample 8, imbibition with the progress that imbibition is reacted
The overall volume of solution remains unchanged in bottle 5.Along with crude oil output, core sample 8 is gradually placed in oil water mixture.Grease
The density of mixture is less than the density of pure water, and the sectional area of core sample 8 is certain, and pressure suffered by core sample 8 is caused to subtract
It is small.By formula: FIt is floating=ρLiquidgVRow=ρLiquidghLiquidS=FPressureIt is known that the reduction of 8 pressure of core sample necessarily leads to rock core
Buoyancy suffered by sample 8 mitigates.Therefore, in order to keep buoyancy suffered by core sample 8 to remain unchanged during imbibition, need to
Supplement moisture content in imbibition bottle 5, increase the volume of oil water mixture in imbibition bottle 5 so that core sample 8 be subject to it is hydraulic constant,
So as to eliminate the influence caused by buoyancy of output oil.
Core sample 8 is hung by hanger 11, and hanger 11 is placed on gravity sensing device.The hanger 11, which is provided with, to be hung
Hook, core sample 8 are connect by copper wire 7 with the suspension hook.Copper wire 7 passes through the test tube on imbibition bottle 5, so as to hang rock core
Sample 8.In order to avoid copper wire 7 is in contact when hanging core sample 8 with the inner wall of test tube, the diameter of test tube should be greater than the copper
The diameter of silk 7.Since core sample 8 has certain weight, for copper wire 7 when hanging core sample 8, core sample 8 is in water
It is able to maintain plumbness.
The gravity sensing device is used to measure the mass change of core sample 8, copper wire 7 and hanger 11, in imbibition reality
In testing, the data result measured by observing and recording the gravity sensing device can be derived that the quality of the core sample 8 becomes
Change, to from which further follow that oil production.Specifically, the gravity sensing device is specifically as follows precision electronic balance 12, it can
The quality and mass change of accurate measurement core sample 8, copper wire 7 and hanger 11, measurement result accuracy are
0.0001g.The precision electronic balance 12 is further electrically connected data collection system 14, which can be meter
Calculation machine, the electric connection mode can be wired connection, and certain electric connection mode may be wireless connection, such as
Using the technologies such as WIFI in the prior art, infrared, bluetooth, or it also can use other wireless communication techniques, the application exists
This does not make specifically to limit.Preferably, the precision electronic balance 12 passes through data line 13 with the data collection system 14
It is attached.Connect the variation that the data collection system 14 of the precision electronic balance 12 will be recorded in real time and be taken reading automatically.
A whole set of experimental provision also reduces workload while reducing measurement error.
In one embodiment, the imbibition experimental provision further include: insulating box 15, the insulating box 15 is for adjusting
The temperature of the imbibition bottle 5.The insulating box 15 is transparent body structure, and the minute-pressure pumps 1, imbibition bottle 5, hanger 11, rainbow
Inhaling the instruments such as conduit 9 and beaker, precision electronic balance 12 can be located in the insulating box 15, to mention for imbibition process
For suitable external environment.
It is described present invention also provides a kind of determination method of imbibition recovery percent of reserves based on above-mentioned imbibition experimental provision
Method includes:
S10: the height of 5 water inlet of imbibition bottle to liquid level top is received；The minute-pressure pump 1 is determined according to the height
Predetermined pressure；
S20: the first data that the gravity sensing device measures are received；
S30: the minute-pressure pump 1 is opened, the second data that the gravity sensing device measures are received；
S40: according to first data, the second data, the density of water, the density of oil, the body of imbibition water displacement oil is determined
Product；
S50: according to volume, core oil saturation, core porosity, rock core length and the rock of imbibition water displacement oil
Core diameter determines imbibition recovery percent of reserves.
After setting the predetermined pressure of minute-pressure pump 1, the first data of start recording gravity sensing device record, in step
In S20, which is specially the core sample quality of initial measurement.Minute-pressure pump 1 is opened, starts to carry out imbibition experiment,
In experimentation, minute-pressure pump 1 will supplement moisture content into imbibition bottle 5 according to the hydraulic situation of change in imbibition bottle 5, to maintain rock core
Predetermined pressure suffered by sample 8.At the same time, gravity sensing device constantly records the quality change situation of core sample 8, obtains
Second data.In step s 30, which is specially the core sample quality measured at the i moment.Certainly, first data
It is not the true quality of core sample 8 with the second data, but the difference of the first data and the second data can reflect core sample 8
Mass change.
In the present embodiment, the calculation formula of the imbibition recovery percent of reserves are as follows:
In formula,
Wherein, S0Indicate core oil saturation, unit %；
Φ is expressed as core porosity, unit %；
L is expressed as rock core length, unit cm；
D is expressed as core diameter, unit cm；
miIt is expressed as i moment core sample quality, unit g；
m0It is expressed as initial core sample quality, unit g；
RiIt is expressed as the imbibition recovery percent of reserves of i moment core sample, unit %；
ρwIt is expressed as the density of injection water, unit g/cm3；
ρoIt is expressed as the density of oil, unit g/cm3；
Δ V is expressed as volume of the i moment relative to initial time imbibition water displacement oil, unit cm3。
Specifically, rock core initial oil volume are as follows:
If rock core buoyancy suffered in imbibition bottle 5 is F, initial time equation are as follows:
When the i-th moment, meet equation:
It can be obtained by equation (2) and equation (3), the fuel-displaced volume of imbibition are as follows:
Wherein, VwiIt is expressed as the volume of rock sample irreducible water, unit cm3。
In one embodiment, the Δ V in the imbibition recovery percent of reserves calculation formula, moreover it is possible to by reading the imbibition
Graduation mark on bottle 5 obtains.
Therefore, in imbibition experimentation, Δ V can be obtained by two methods: first method is by reading essence
The data that close electronic balance 12 records, obtain the mass change of core sample 8, obtain imbibition water displacement oil by formula (4)
Volume；Second method is the scale directly read on imbibition bottle 5, by reading the difference in height of oil film liquid level, can be intuitive
To the volume of imbibition water displacement oil.Therefore the imbibition experimental provision during the experiment, can obtain the body of imbibition output oil 6 simultaneously
Long-pending and the two parameters of the mass change of core sample 8, can either intuitively react oil production, and can be improved calculated result
Precision, while both parameters can be verified mutually, and conventional efficient is substantially increased.
In the present embodiment, the predetermined pressure that the minute-pressure pump 1 determines are as follows:
P=ρwg(Hi+A)
Wherein,
A is expressed as the water inlet of the imbibition bottle to the height of oil water surface, unit mm；
G is expressed as acceleration of gravity, unit m/s2；
HiIt is expressed as the height of oil, unit mm；
ρwIt is expressed as the density of injection water, unit g/cm3。
In the present embodiment, minute-pressure pump 1 sets deviation as 1Pa, and the accuracy of the water level lifting height is
0.1mm。
By formula P=ρwg(Hi+ A) it can obtain:When the deviation of the setting value of minute-pressure pump 1 is 1Pa, by
Formula can obtain HiThe error of+A is 0.1mm.Therefore it is that imbibition bottle 5 supplies water by the way that the minute-pressure is arranged to pump 1, can accurately controls liquid level
The rate of climb.
It is real to imbibition provided by the present application below in conjunction with a specific application scenarios in order to better understand the application
Experiment device is illustrated.
A kind of imbibition experimental provision, referring to Fig. 1, the imbibition experimental provision includes: imbibition bottle 5, the imbibition bottle 5 has
There is hollow cavity, the hollow cavity is provided with water and core sample 8, and the imbibition bottle 5 has open end, and the open end is set
It is equipped with test tube, the test tube has opposite top and bottom, indicates graduation mark, the imbibition from the upper end to the lower end
Water level in bottle 5 is not less than test tube the lowermost graduation mark；Minute-pressure pump 1, the minute-pressure pump 1 are used for the imbibition bottle 5
It is interior that the water of predetermined pressure is provided；The hanger 11 of the core sample 8 is hung, the hanger 11 is placed on precision electronic balance 12
On, the precision electronic balance 12 connects data collection system 14 by data line 13；Wherein, the imbibition bottle 5 be provided with into
The mouth of a river, the water inlet are connect with minute-pressure pump 1 by pipeline 3, hydraulic control valve 4 are provided on the pipeline, when described
When hydraulic control valve 4 detects that the pressure of two sides is unequal, in opened condition；When the hydraulic control valve 4 detects two sides
It is in closed state when pressure is equal.
Further, the imbibition experimental provision further include: siphon guide 9 and beaker 10, being provided on imbibition bottle 5 can
The water outlet of seamless connection is carried out with siphon guide 9.The siphon guide 9 has suction casing, and the suction casing is located at imbibition bottle 5
It is interior, several apopores are provided on the suction casing, so as to simulate the perforation of well.Siphon guide 9 will be in imbibition bottle 5
Water is directed into beaker 10, is provided with the regulating valve that can change aperture on the siphon guide 9.
The imbibition bottle 5 includes: main paragraph, the main paragraph be it is cylindric, inside be equipped with core sample 8 and water, it is described
Water body is blue.Changeover portion is can be set between the main paragraph and the test tube, the changeover portion has opposite upper and lower
Both ends, the upper end of the changeover portion and the test tube are in mating connection, and the lower end of the changeover portion is matched with the main paragraph
Connection, the tapered structure of changeover portion.
When 5 internal cause siphon guide 9 of imbibition bottle water outlet, moisture content volatilization or output oil influence cause the liquid volume in bottle with
And liquid property, when changing, the pressure of 4 two sides of hydraulic control valve is unequal, that is, acts at hydraulic control valve 4
Hydraulic unequal with 1 setting predetermined pressure of minute-pressure pump, in opened condition, minute-pressure pump 1 supplements water for imbibition bottle 5 to hydraulic control valve 4
Part, until the pressure of 4 two sides of hydraulic control valve is equal, hydraulic control valve 4 is closed, and water supply terminates.
When experiment, 1 setting predetermined pressure of minute-pressure pump is 0.255MPa, and the bottom of bottle diameter of imbibition bottle 5 is 10cm, corresponding imbibition
The water inlet of bottle 5 is to liquid level top apart from about 20cm.With the progress of imbibition process, moisture content constantly volatilizees, in imbibition bottle 5 not
It is disconnected to there is water to flow out through siphon guide 9, while with oily 6 outputs of imbibition output, lead to hydraulic reduction suffered by core sample 8, makes
It obtains buoyancy to reduce, concrete principle is illustrated above, and the application does not remake and is described in detail.At this point, hydraulic control valve 4 is beaten
It opens, minute-pressure pump 1 supplements moisture content for imbibition bottle 5, until the pressure of 4 two sides of hydraulic control valve is equal, hydraulic control valve 4 is closed, and supplies
Water terminates.
It is recorded by the data that data collection system 14 measures precision electronic balance 12, crude oil production can be calculated
Volume out, then by proprietary formula, imbibition recovery percent of reserves can be calculated.The parameter can be used for estimating the infiltration of practical compact reservoir
Exploitation effect is inhaled, the recovery ratio for improving compact reservoir has important directive significance.Due in whole experiment process, always
It is able to maintain that buoyancy suffered by core sample 8 is constant, therefore by the data variation of metering precision electronic balance 12, it can be direct
It obtains mass change of the core sample 8 during imbibition, then is scaled the volume of output crude oil.In addition, imbibition output oil 6 will
On float on the graduation position of imbibition bottle 5, by reading the difference in height of output pasta, can obtain the volume of exudation crude oil, thus
The crude oil volume conversed can further be verified.
The imbibition experimental provision can obtain imbibition by directly reading 5 high scale line of imbibition bottle in imbibition experimentation
Output oil 6.Therefore imbibition oil-producing volume and 8 mass change of core sample the two parameters can be obtained simultaneously, and are mutually tested
Card, can greatly improve the accuracy of calculated result.By obtained crude oil output volume by proprietary formula, can from which further follow that
Imbibition recovery percent of reserves, so as to study the recovery ratio of compact reservoir.
The proprietary formula is as follows:
In formula,
Wherein, S0Indicate core oil saturation, unit %；
Φ is expressed as core porosity, unit %；
L is expressed as rock core length, unit cm；
D is expressed as core diameter, unit cm；
miIt is expressed as i moment core sample quality, unit g；
m0It is expressed as initial core sample quality, unit g；
RiIt is expressed as the imbibition recovery percent of reserves of i moment core sample, unit %；
ρwIt is expressed as the density of injection water, unit g/cm3；
ρoIt is expressed as the density of oil, unit g/cm3；
Δ V is expressed as volume of the i moment relative to initial time imbibition water displacement oil, unit cm3。
The imbibition experimental provision that the application embodiment provides compared with the existing technology in measuring device have it is following excellent
Point:
(1) the imbibition experimental provision can simultaneously obtain imbibition oil-producing volume and core sample quality in imbibition experimentation
Amount changes the two parameters, can mutually be verified, can greatly improve the accuracy of calculated result.
(2) the imbibition experimental provision analog static state imbibition and dynamic imbibition both processes.
(3) the imbibition experimental provision is by can be avoided the variation of buoyancy suffered by core sample to control hydraulic in imbibition bottle
It is influenced caused by experimental result, to ensure that the accuracy of measurement result.
(4) the minute-pressure pump and precision electronic balance in the imbibition experimental provision, measuring accuracy is high, ensure that experimental result standard
True property.
(5) by can automatically record and save number in real time for the connection of precision electronic balance and data collection system
According to, it is time saving and energy saving, reduce workload.
(6) the imbibition experimental provision is easy to operate, and measurement accuracy is high, compared with the existing technology in NMR imaging measurement
Device, cost is relatively low, applied widely.
Above-described embodiment is only the technical concepts and features for illustrating the application, and its object is to allow person skilled in the art
Scholar can understand present context and implement accordingly, and the protection scope of the application can not be limited with this.It is all according to the application
Equivalent change or modification made by Spirit Essence should all cover within the scope of protection of this application.
All articles and reference disclosed, including patent application and publication, for various purposes by quoting knot
Together in this.Describing combined term " substantially by ... constitute " should include identified element, ingredient, component or step and reality
Other elements, ingredient, component or the step of the basic novel feature of the combination are not influenced in matter.Using term "comprising" or
" comprising " describes the combination of element here, ingredient, component or step it is also contemplated that substantially by these elements, ingredient, component
Or the embodiment that step is constituted.Here by using term " can with ", it is intended to illustrate that " can with " includes described any
Attribute is all optional.
Multiple element, ingredient, component or step can be provided by single integrated component, ingredient, component or step.Optionally
Ground, single integrated component, ingredient, component or step can be divided into multiple element, ingredient, component or the step of separation.It is used to
The open "a" or "an" for describing element, ingredient, component or step is not intended to exclude other elements, ingredient, component
Or step.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except provided example all will be aobvious and easy for a person skilled in the art
See.Therefore, the range of this introduction should not be determined referring to foregoing description, but should referring to appended claims and this
The full scope of the equivalent that a little claims are possessed determines.For comprehensive purpose, all articles and with reference to including special
The disclosure of benefit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as applicant the theme is not thought of as it is disclosed
Apply for a part of theme.
Claims (10)
1. a kind of imbibition experimental provision characterized by comprising
Imbibition bottle, the imbibition bottle have hollow cavity, and the hollow cavity is provided with water and core sample, the imbibition bottle tool
There is an open end, the open end is provided with test tube, and the test tube has opposite top and bottom, from the upper end under described
End indicates graduation mark, and the water level in the imbibition bottle is not less than test tube the lowermost graduation mark；
Minute-pressure pump, the minute-pressure pump is for providing the water of predetermined pressure into the imbibition bottle；
The hanger of the core sample is hung, the hanger is placed on gravity sensing device, and the gravity sensing device is electrical
Connect data collection system；
Wherein, the imbibition bottle is provided with water inlet, and the water inlet is pumped with the minute-pressure and connect by attachment device, the company
Connection device includes: hydraulic control valve, when the hydraulic control valve detect two sides pressure it is unequal when, in opened condition；When
It is in closed state when the hydraulic control valve detects that the pressure of two sides is equal.
2. imbibition experimental provision as described in claim 1, which is characterized in that the imbibition experimental provision further include: siphon is led
Pipe and beaker, the siphon guide have opposite both ends, and one end is connected to the imbibition bottle, and the other end is connected to the beaker.
3. imbibition experimental provision as claimed in claim 2, which is characterized in that be provided with switch control dress on the siphon guide
It sets, the switch controlling device is specially the regulating valve that can change aperture.
4. imbibition experimental provision as claimed in claim 3, which is characterized in that the siphon guide has suction casing, the suction
Enter section to be located in the imbibition bottle, several apopores are provided on the suction casing.
5. imbibition experimental provision as described in claim 1, which is characterized in that the imbibition experimental provision further include: insulating box,
The insulating box is used to adjust the temperature of the imbibition bottle.
6. a kind of determination method of the imbibition recovery percent of reserves based on imbibition experimental provision as claimed in claim 1 to 5,
It is characterized in that, which comprises
Receive the height of the imbibition bottle water inlet to liquid level top；The pre- level pressure of the minute-pressure pump is determined according to the height
By force；
Receive the first data that the gravity sensing device measures；
The minute-pressure pump is opened, the second data that the gravity sensing device measures are received；
According to first data, the second data, the density of water, the density of oil, the volume of imbibition water displacement oil is determined；
It is true according to the volume of imbibition water displacement oil, core oil saturation, core porosity, rock core length and core diameter
Determine imbibition recovery percent of reserves.
7. the determination method of imbibition recovery percent of reserves as claimed in claim 6, which is characterized in that the meter of the imbibition recovery percent of reserves
Calculate formula are as follows:
In formula,
Wherein, S0Indicate core oil saturation, unit %；
Φ is expressed as core porosity, unit %；
L is expressed as rock core length, unit cm；
D is expressed as core diameter, unit cm；
miIt is expressed as core sample quality described in the i moment, unit g；
m0It is expressed as the initial core sample quality, unit g；
RiIt is expressed as the imbibition recovery percent of reserves of core sample described in the i moment, unit %；
ρwIt is expressed as the density of injection water, unit g/cm3；
ρoIt is expressed as the density of oil, unit g/cm3；
Δ V is expressed as volume of the i moment relative to initial time imbibition water displacement oil, unit cm3。
8. the determination method of imbibition recovery percent of reserves as claimed in claim 7, which is characterized in that the imbibition recovery percent of reserves calculates
Δ V in formula, moreover it is possible to be obtained by reading the graduation mark on the imbibition bottle.
9. the determination method of imbibition recovery percent of reserves as claimed in claim 6, which is characterized in that the minute-pressure pump is determining to be made a reservation for
Pressure are as follows:
P=ρwg(Hi+A)
Wherein,
A is expressed as the water inlet of the imbibition bottle to the height of oil water surface, unit mm；
G is expressed as acceleration of gravity, unit m/s2；
HiIt is expressed as the height of oil, unit mm；
ρwIt is expressed as the density of injection water, unit g/cm3。
10. the determination method of imbibition recovery percent of reserves as claimed in claim 9, which is characterized in that the setting of the minute-pressure pump is inclined
Difference is 1Pa, and the accuracy of imbibition water in bottle position lifting height is 0.1mm.
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| US11624273B2 (en) | 2021-03-16 | 2023-04-11 | China University Of Petroleum (East China) | Shale oil fracturing synchronous energizing simulation experimental device and method |
| CN115992700A (en) * | 2022-11-10 | 2023-04-21 | 常州大学 | Experimental device and method for simulating low-permeability tight oil reservoir pressure-stewing-drainage-mining |
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| CN113324468A (en) * | 2021-06-28 | 2021-08-31 | 山东科技大学 | Testing device and testing method for measuring seepage height of reverse seepage experiment |
| CN113324468B (en) * | 2021-06-28 | 2022-06-21 | 山东科技大学 | Testing device and testing method for measuring seepage height of reverse seepage experiment |
| CN113670778A (en) * | 2021-08-26 | 2021-11-19 | 中国石油大学(华东) | Shale imbibition experimental apparatus of magnetic suspension measurement |
| CN115992700A (en) * | 2022-11-10 | 2023-04-21 | 常州大学 | Experimental device and method for simulating low-permeability tight oil reservoir pressure-stewing-drainage-mining |
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