CN205920034U - Measure gas logging device of higher permeability rock core - Google Patents
Measure gas logging device of higher permeability rock core Download PDFInfo
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- CN205920034U CN205920034U CN201620766917.7U CN201620766917U CN205920034U CN 205920034 U CN205920034 U CN 205920034U CN 201620766917 U CN201620766917 U CN 201620766917U CN 205920034 U CN205920034 U CN 205920034U
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- rock core
- valve
- cylinder
- high pressure
- higher permeability
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Abstract
The utility model provides a measure gas logging device of higher permeability rock core, including nitrogen cylinder, decompression surge damping valve and the six -way valve that communicates in proper order, it has admission valve, U type pipe, air outlet valve and rock core holder to communicate respectively on the six -way valve, the rock core holder communicates respectively has soap -film formula flowmeter and high -pressure manual measuring pump, the manual measuring pump of high pressure intercommunication has the feed liquor container, be equipped with the feed liquor valve on the feed liquor container, be equipped with out the liquid valve on the manual measuring pump of high pressure. The device is with low costs, and is easy and simple to handle, and good reproducibility, especially ressure measurement are accurate, can effectively improve the experiment precision.
Description
Technical field
This utility model is related to oil-gas field development technical field, especially relates to a kind of gas of measurement core permeability and surveys dress
Put.
Background technology
Rock core permeability represents the ability that rock core allows fluid under certain pressure reduction, reflects the one of oil and gas reservoir physical property
Item key character, directly affects oil gas well production size.Permeability size is characterized by absolute permeability, Accurate Determining formation rock
Stone absolute permeability, either to oil-gas exploration, evaluating reservoir or all significant to oil field development.
In petroleum industry, rock core absolute permeability mainly passes through live Logging data analysis and laboratory experiment obtains.Mesh
In cup, experimental technique is based primarily upon water and surveys permeability and perm-plug method.Wherein water is surveyed and is not flowed due to compatibility and hole wall
Liquid film accounts for the factors such as a part of circulation passage it is impossible to definitely reflect rock intrinsic property.Gas method measures to a certain extent gram
Take water and survey the defect existing, more can definitely reflect the true penetrating power of rock.Conventional experimental technique is: is surveyed using experimental provision
Obtain the inlet pressure (outlet pressure is atmospheric pressure) at five to ten group rock core two ends and by the gas flow of rock core, using kirschner school
Execute and obtain clancy behavior scale.
In experimentation, the rock core higher to permeability, inlet pressure is less and is difficult to measure, therefore, piezometry
The whether accurate key becoming experiment success or failure.Especially, the pressure by rock core that experiment records and the data of gas flow are
Limited, if error in reading or operational error occur in experimentation or instrument measurement is inaccurate, all experimental result can be produced
Extreme influence.At present, in industry and laboratory measurement, because the elastic sensing element of mechanical compression table has very high machine
Tool intensity and the characteristic such as convenient for production are so that mechanical compression table is increasingly widely applied.Bourdon tube is made in pressure
With under, produce elastic deformation cause pipe end displacement, it is displaced through mechanical transmission mechanism and is amplified, and passes to instruction device,
Again tested pressure magnitude is pointed out on the index dial be carved with the legal unit of measurement by pointer.However, it is more accurate in Chinese market
Pressure gauge import in the majority, price comparison is expensive；Elapse over time, spring occurs strain relaxation, and deviation of reading can be increasingly
Greatly, these all seriously restrict the accuracy that gas surveys core permeability.
Utility model content
The utility model proposes a kind of gas of measurement higher permeability rock core surveys device, this installation cost is low, easy and simple to handle,
Reproducible, experiment longitude can be effectively improved.
The technical solution of the utility model be achieved in that a kind of measurement core permeability gas survey device, including according to
The nitrogen cylinder of secondary connection, decompression venting valve and six-way valve, described six-way valve has been respectively communicated with intake valve, u-shaped pipe, air outlet valve and
Core holding unit, described core holding unit has been respectively communicated with soap film type flowmeter and high pressure hand-operated dosing pump, described high pressure hand-operated
Dosing pump is communicated with feed-containing vessel, and described feed-containing vessel is provided with liquid feed valve, and described high pressure hand-operated dosing pump is provided with liquid valve.
As a kind of preferred technical scheme, described core holding unit includes cylinder, and described cylinder is provided with for connecting
The through hole of described high pressure hand-operated dosing pump, is provided with rubber sleeve in described cylinder, described cylinder be respectively provided on two sides with a sheath,
Described sheath and rock core rubber sleeve cooperatively form sealing cavity.
As a kind of preferred technical scheme, described in every side, between cylinder and sheath, it is additionally provided with a copper sheathing and sealing respectively
Circle.
As a kind of preferred technical scheme, described high pressure hand-operated dosing pump includes pump case, and described pump case is measured
Table, is slidably fitted with piston in described pump case body, described piston is connected with piston rod, described piston rod is connected with foreign steamer.
Employ technique scheme, the beneficial effects of the utility model are: this utility model is on the basis of principle of stabilized voltage
On, the u-shaped pipe using the water equipped with methylene blue staining accurately measures inlet port pressure, has structure simply, low cost, operation
Convenient, stable performance, the advantages of reproducible.
Brief description
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, before not paying creative labor
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is that this utility model is used the gas flow gauge figure measuring higher permeability rock core.
Fig. 2 is the profile of this utility model core holding unit.
Fig. 3 is this utility model rock core average pressure flow-pressure differential relation curve
Wherein: 1, nitrogen cylinder, 2, decompression venting valve, 3, u-shaped pipe, 4, intake valve, 5, six-way valve, 6, air outlet valve, 7, rock core
Clamper, 8, rock core to be measured, 9, soap film type flowmeter, 10, liquid valve, 12, liquid feed valve, 13, feed-containing vessel, 14, high pressure hand-operated
Dosing pump, 15, piston, 16, foreign steamer, 17, cylinder, 18, copper sheathing, 19, sheath, 20, rubber sleeve, 21, sealing ring, 22, through hole.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely description is it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of making creative work
The every other embodiment being obtained, broadly falls into the scope of this utility model protection.
As depicted in figs. 1 and 2, a kind of gas of measurement core permeability surveys device, including the nitrogen cylinder 1 being sequentially communicated, subtracts
Pressure pressure maintaining valve 2 and six-way valve 5, six-way valve 5 has been respectively communicated with intake valve 4, u-shaped pipe 3, air outlet valve 6 and core holding unit 7, rock
Heart clamp holder 7 has been respectively communicated with soap film type flowmeter 9 and high pressure hand-operated dosing pump 14, and high pressure hand-operated dosing pump 14 is communicated with feed liquor
Container 13, feed-containing vessel 13 is provided with liquid feed valve 12, and high pressure hand-operated dosing pump 14 is provided with liquid valve 10.
Core holding unit 7 includes cylinder 17, and cylinder 17 is provided with the through hole 22 for connecting high pressure hand-operated dosing pump 14, cylinder
Be provided with rubber sleeve 20 in body 17, cylinder 17 be respectively provided on two sides with a sheath 19, sheath 19 is cooperatively formed with rubber sleeve 20
Sealing cavity.It is additionally provided with a copper sheathing 18 and sealing ring 21 respectively between each side neck body 17 and sheath 19.
High pressure hand-operated dosing pump includes pump case, gauge table 11 in pump case, is slidably fitted with piston 15 in pump case body, lives
Plug 15 is connected with piston rod, and piston rod is connected with foreign steamer 16.
Measure the length and width in rock core 8 section to be measured with slide gauge, calculate cross-sectional area a.Measurement rock core length l, record is real
Test room atmosphere pressure p0And indoor temperature, according to atmospheric pressure, experimental temperature, obtained with temperature relation using nitrogen viscosity
Its viscosity number μ.
Rock core to be measured is placed in core holding unit, two ends are fixed: as shown in Fig. 2 core holding unit includes cylinder 17, peace
It is contained in the rubber sleeve 20 in cylinder 17, and is arranged on the sheath 19 of cylinder 17 both sides, cylinder 17 is provided with for connecting
The through hole 22 of high pressure hand-operated dosing pump liquid valve 10, after sheath 19 is arranged on cylinder 17, with rubber sleeve 20 cooperatively form close
Envelope cavity.This rock core perm-plug method device also includes copper sheathing 18 and sealing ring 21, sealing ring 21 and copper sheathing 18 from inside to outside according to
In the secondary breach being arranged on sheath 19, and sealing ring 21 is in close contact with cylinder 22 and sheath 19.This rock core perm-plug method
Device is pressurizeed by high pressure hand-operated dosing pump 14, so that rock core 8 to be measured and rubber sleeve 20 is in close contact.
Whether each valve of checking experiment instrument is closed, and connects gas logging permeability experiment device.As Fig. 1 institute
Show, core holding unit side is sequentially connected six-way valve 5 and nitrogen cylinder 1, opposite side arranges soap film flowmeter 9；Connect on six-way valve 5
It is connected to u-shaped pipe 3, core holding unit 7 is connected with high pressure hand-operated dosing pump 14 simultaneously.
Add water in feed-containing vessel 13, open liquid feed valve 12, rotate counterclockwise foreign steamer 16, moving after band piston 15 makes height
It is full of water in pressure manually-actuated metering pump；Close liquid feed valve 12, open liquid valve 10, before rotating clockwise foreign steamer 16 promotion piston 15
Move, when pressure gauge has certain reading, open liquid feed valve 12, close after draining residual gas, continue to be forced into suitable confined pressure
Value.
Measure and pass through nitrogen flow under rock core difference inlet and outlet pressure to be measured: open intake valve 4, air outlet valve 6, dextrorotation
Turn decompression venting valve 2 on nitrogen cylinder 1, wait 2min it is ensured that nitrogen drains pipeline, rock core to be measured 8 internal residual air, make simultaneously
Produced foam moistening soap film type flowmeter 9 wall in advance；Adjust decompression venting valve 2, so that core entry pressure is opened from lower value
Begin it is ensured that in the range of Darcy Flow, record u-shaped pipe liquid-column height difference δ h, when in soap film type flowmeter, formation foam with wall is in
During plumbness, coordinate electronic stopclock, calculate nitrogen outlet pressure down-off q0；Measure successively under 5 groups of different inlet and outlet pressures
By nitrogen flow.
Rock core import end pressure is calculated according to formula (1).
p1=p0+ρgδh (1)
In formula, p1- core entry end pressure, mpa；
p0- atmospheric pressure (absolute), mpa；
ρ fluid column density (water), takes 1g/cm herein3；
G local gravitational acceleration
δ h u-shaped pipe liquid-column height is poor, cm；
Perm-plug method value kg is calculated according to formula (2).
In formula, kg-perm-plug method, d；
q0The gas flow of-rock core the port of export, ml/s；
p0- atmospheric pressure (absolute), mpa；
μ-nitrogen viscosity, mpa s；
L-rock core length, cm；
The cross-sectional area of a-rock core, cm；
P1-core entry end pressure, mpa；
P2-rock core outlet pressures, mpa.
Test rock core is length 29.65cm, wide, the high square rock core being 4.5cm, and atmospheric pressure was 0.0965mpa at that time,
Nitrogen viscosity is 0.017112mpa s.Experimental result is as shown in table 1:
Table 1 16-4-24 rock core perm-plug method data
In order to obtain absolute permeability, now need to correct.Rock core to be measured is calculated according to formula (3) and formula (4) and imports and exports pressure
Difference δ p and nitrogen flow q under average inlet and outlet pressure.
δ p=p1-p2(3)
Calculate obtained experimental data as shown in table 2:
Table 2 16-4-24 rock core inlet outlet pressure differential and nitrogen flow relation table under average pressure
Simulate No. 16-4-24 rock core to be measured using microsoft excel data processing toolses (method of least square) to enter
Outlet pressure reduction and nitrogen flow linear relationship line under average pressure.As shown in Figure 3: rock core average pressure flow-pressure differential relation is bent
Line.
Obtain fitting a straight line slope m (m=211.38), goodness of fit r2(r2=1).Calculated to be measured after correction by formula (5)
Rock core absolute permeability k (k=0.5296d).
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all this
Within the spirit of utility model and principle, any modification, equivalent substitution and improvement made etc., should be included in this utility model
Protection domain within.
Claims (4)
1. a kind of gas of measurement higher permeability rock core surveys device it is characterised in that the nitrogen cylinder including being sequentially communicated, decompression are steady
Pressure valve and six-way valve, described six-way valve has been respectively communicated with intake valve, u-shaped pipe, air outlet valve and core holding unit, described rock core folder
Holder has been respectively communicated with soap film type flowmeter and high pressure hand-operated dosing pump, and described high pressure hand-operated dosing pump is communicated with feed-containing vessel,
Described feed-containing vessel is provided with liquid feed valve, and described high pressure hand-operated dosing pump is provided with liquid valve.
2. a kind of gas of measurement higher permeability rock core surveys device it is characterised in that described rock core presss from both sides as claimed in claim 1
Holder includes cylinder, and described cylinder is provided with the through hole for connecting described high pressure hand-operated dosing pump, is provided with glue in described cylinder
Leather sheath cylinder, described cylinder be respectively provided on two sides with a sheath, described sheath and rock core rubber sleeve cooperatively form sealing cavity.
3. a kind of gas of measurement higher permeability rock core surveys device it is characterised in that described in every side as claimed in claim 2
It is additionally provided with a copper sheathing and sealing ring respectively between cylinder and sheath.
4. a kind of gas of measurement higher permeability rock core surveys device it is characterised in that described high pressure handss as claimed in claim 1
Dynamic dosing pump includes pump case, gauge table in described pump case, is slidably fitted with piston in described pump case body, and described piston connects
There is piston rod, described piston rod is connected with foreign steamer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620766917.7U CN205920034U (en) | 2016-07-20 | 2016-07-20 | Measure gas logging device of higher permeability rock core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620766917.7U CN205920034U (en) | 2016-07-20 | 2016-07-20 | Measure gas logging device of higher permeability rock core |
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| CN205920034U true CN205920034U (en) | 2017-02-01 |
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| CN201620766917.7U Expired - Fee Related CN205920034U (en) | 2016-07-20 | 2016-07-20 | Measure gas logging device of higher permeability rock core |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108519319A (en) * | 2018-05-25 | 2018-09-11 | 华南理工大学 | The flow resistance measuring device and method of a kind of negative-pressure type porous material and its product |
| CN108627437A (en) * | 2017-03-22 | 2018-10-09 | 中国石油化工股份有限公司 | Gas micro measurement device and method under experiment reservoir conditions |
| CN109459362A (en) * | 2017-09-06 | 2019-03-12 | 中国石油化工股份有限公司 | The integrated testing device and method of high temperature and pressure Water-rock interaction and gas permeability |
| CN112127869A (en) * | 2019-06-24 | 2020-12-25 | 中石化石油工程技术服务有限公司 | Zero-viewing flow correction method, oil gas water flow logging method and turbine flow instrument |
| CN113866070A (en) * | 2021-11-19 | 2021-12-31 | 郑州大学 | Device and method for measuring micro surface area of macroporous material |
-
2016
- 2016-07-20 CN CN201620766917.7U patent/CN205920034U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108627437A (en) * | 2017-03-22 | 2018-10-09 | 中国石油化工股份有限公司 | Gas micro measurement device and method under experiment reservoir conditions |
| CN108627437B (en) * | 2017-03-22 | 2021-04-23 | 中国石油化工股份有限公司 | Gas micro-flow measuring device and method under reservoir conditions for experiment |
| CN109459362A (en) * | 2017-09-06 | 2019-03-12 | 中国石油化工股份有限公司 | The integrated testing device and method of high temperature and pressure Water-rock interaction and gas permeability |
| CN108519319A (en) * | 2018-05-25 | 2018-09-11 | 华南理工大学 | The flow resistance measuring device and method of a kind of negative-pressure type porous material and its product |
| CN108519319B (en) * | 2018-05-25 | 2023-12-22 | 华南理工大学 | Negative pressure type porous material and flow resistance measuring device and method for product of negative pressure type porous material |
| CN112127869A (en) * | 2019-06-24 | 2020-12-25 | 中石化石油工程技术服务有限公司 | Zero-viewing flow correction method, oil gas water flow logging method and turbine flow instrument |
| CN113866070A (en) * | 2021-11-19 | 2021-12-31 | 郑州大学 | Device and method for measuring micro surface area of macroporous material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170201 Termination date: 20170720 |
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| CF01 | Termination of patent right due to non-payment of annual fee |