CN207073412U - A kind of gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation - Google Patents
A kind of gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation Download PDFInfo
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- CN207073412U CN207073412U CN201721032799.8U CN201721032799U CN207073412U CN 207073412 U CN207073412 U CN 207073412U CN 201721032799 U CN201721032799 U CN 201721032799U CN 207073412 U CN207073412 U CN 207073412U
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Abstract
The utility model belongs to technique of experimental simulation field, discloses a kind of gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation, and the gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation is provided with：Back-up sand case；The back-up sand case is laterally divided into the equidistant Inner rooms of 5 connections；Separated between equidistant interior room by dividing plate；The biside plate bottom of the back-up sand case is provided with inlet opening and apopore.The utility model simulates air water flowing in gas reservoir using high intensity lucite structure sealing back-up sand casing；Change back-up sand granularity and the ratio of cement, simulate homogeneous/heterogeneous reservoir；Set the fluid column in U-tube, simulated formation pressure and formation pressure gradient；Using the device, the simulation of gas-water interface is realized, for evaluating the physical property origin cause of formation and the hydrodynamics origin cause of formation of gas-water interface feature.
Description
Technical field
The utility model belongs to technique of experimental simulation field, more particularly to a kind of simulation of gas reservoir tilted gas-water contact origin cause of formation is in fact
Experiment device.
Background technology
At present, the simulation for tilted gas-water contact surveys saturation degree method using water power analog simulation, indirect pressure measurement more.It is three-dimensional
Physical simulation techniques are manufactured according to electrode measuring using double compression molding techniques and resistance to oxidation, corrosion resistant High-tech Material
The probe of saturation degree change can be measured.Measurement probe measurement scope is demarcated, establishes the resistance value of different probe
With the resistivity relation of solution.Saturation degree test system includes model, displacement pump, intermediate receptacle, profit are automatically separated gauge,
Differential pressure pickup, A/D cards, numbered card, electric bridge, saturation degree measurement probe, computer and Survey Software.The test data of system can
Lean on, precision is higher.The profit volume flow measured in real time using Buckley-Leverett equations and exit end face, is calculated
Different experiments saturated oils changes with time with water drive oil procedure exit end face saturation degree, by outlet port measurement saturation degree with
Water drive process saturation degree changes to be compared with the change of theoretical calculation end face saturation degree.However, because experimental model is much small
In actual formation, test point limited amount is influenceed serious by anisotropism, and test data is regular poor, tested person flow
Systematic error influences serious, it tends to be difficult to obtains conformance law.
In summary, the problem of prior art is present be：Experimentation can not be observed directly, and test result is by systematic error
Have a great influence, experiment it is repeatable poor, experiment be difficult to realize satisfactory results.
The content of the invention
The problem of existing for prior art, it is real that the utility model provides a kind of gas reservoir tilted gas-water contact origin cause of formation simulation
Experiment device.
The utility model is achieved in that a kind of gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation, the gas reservoir
Tilted gas-water contact origin cause of formation analogue experiment installation is provided with：
Back-up sand case；
The back-up sand case is laterally divided into the equidistant Inner rooms of 5 connections；Separated between equidistant interior room by dividing plate；
The biside plate bottom of the back-up sand case is provided with inlet opening and apopore.
Further, the back-up sand box top is provided with removable cover.
Further, separated between the equidistant interior room by dividing plate, the position away from below dividing plate 20mm is provided with through hole.
Further, the inlet opening and apopore are connected with outside by U-tube.
The advantages of the utility model and good effect are：Sealing back-up sand casing, simulation are built using high intensity lucite
Air water flows in gas reservoir；Change back-up sand granularity and the ratio of cement, simulate homogeneous/heterogeneous reservoir；Set in U-tube
Fluid column, simulated formation pressure and formation pressure gradient；Using the device, the simulation of gas-water interface is realized, for evaluating air water circle
The physical property origin cause of formation and the hydrodynamics origin cause of formation of region feature.
Brief description of the drawings
Fig. 1 is the back-up sand case knot for the gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation that the utility model embodiment provides
Structure schematic diagram；
Fig. 2 is the inlet opening structural representation that the utility model embodiment provides；
Fig. 3 is the diaphragm structure schematic diagram that the utility model embodiment provides；
In figure：1st, back-up sand case；2nd, removable cover；3rd, equidistant interior room；4th, dividing plate；5th, through hole；6th, inlet opening；7th, apopore.
Embodiment
For invention, features and effects of the present utility model can be further appreciated that, following examples are hereby enumerated, and coordinate
Accompanying drawing describes in detail as follows.
Structure of the present utility model is explained in detail below in conjunction with the accompanying drawings.
As shown in Figure 1-Figure 3, the gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation that the utility model embodiment provides
Including：Back-up sand case 1, removable cover 2, equidistant interior room 3, dividing plate 4, through hole 5, inlet opening 6, apopore 7.
The top of back-up sand case 1 is provided with removable cover 2；Back-up sand case 1 is laterally divided into the equidistant Inner rooms 3 of 5 connections；Equidistant interior room 3
Between separated by dividing plate 4, the position away from below dividing plate 20mm is provided with through hole 5；The biside plate bottom of back-up sand case 1 is provided with inlet opening
6 and apopore 7, it is connected with outside by U-tube.
Back-up sand case 1 long 400mm, wide 40mm, high 200mm.
The interior room length 80mm of equidistant interior room 3.
Equidistant interior room 3 uses homogeneous back-up sand program simulation homogeneous formation, and each interior room uses different back-up sand schemes.
Pass through the rate control back-up sand of back-up sand granularity and cement in the equidistant interior room 3 of back-up sand case 1 of the present utility model
The permeability of model, using homogeneous back-up sand program simulation homogeneous formation；Each interior room uses different back-up sand schemes, simulates heterogeneous
Influence degree of the physical property to gas-water interface；The bottom both ends of back-up sand case 1 set an inlet opening 6 and an apopore 7 respectively, adopt
Bottom water energy is controlled with the fluid column in ft connection " U-tube ", can analog constant if the liquid-column height that both ends are kept in balance
Influence of the bottom water pressure to gas-water interface, can simulated formation barometric gradient or stratum current if both ends keep stable pressure difference
Influence of the intensity to gas reservoir gas-water interface.
The application effect of the present invention is explained in detail with reference to experiment.
1st, the physical property origin cause of formation experimental study of tilted gas-water contact is as follows：
(1) experimental principle
Actual formation is in Filling process, due to gas column under-inflation, in the region shape that relatively hypotonic band and physical property are poor
Into substantial amounts of stratum water, then often find that the poorer reservoir formation water content of physical property is relatively higher in Cheng Zanghou people.
During lab simulation, by back-up sand granularity and cement content, the model with physical difference is artificially filled and presented, utilizes parent
The self-priming effect of silhydrite sand, forms air water intermediate zone, intermediate zone depends highly on the suction in high-end sandpack column pore network
Suck pressure.Therefore tilted gas-water contact caused by will be seen that heterogeneous physical property in appearance from model.
(2) Germicidal efficacy
The liquid-column height of air water intermediate zone can be calculated by capillary force formula.For Sebei Gas Field reservoir rock, according to
Between being distributed in 0.15-2.5MPa according to physical property its capillary force, be converted into air water intermediate zone liquid-column height be up to 15-250m it
Between, it is clear that beyond the yardstick of laboratory sand pack.
This experiment is lecture experiment, and the air water intermediate zone difference of displaying can't be used for carrying out the gas reservoir engineering meter of correlation
Calculate.In experiment, by model top seal, and certain air pressure is kept, liquid level rises caused by preventing capillary force, makes gas in experiment
Water intermediate zone can show the difference in height related to physical property.
10 hours are stood, liquid level tends towards stability in back-up sand case, and dark color is water, and white is gas.It has been observed that the hydrostatic of model
Interfacial level is consistent, but intermediate zone fluid column significant difference, and stronger with physical property correlation.
(3) analysis of experimental results
The source direction of Sebei Gas Field is east northeast southwester direction, is gradually weakened along source direction hydrodynamic force, sedimentation is consolidated
Phase granularity is less and less, it is meant that from east northeast, southwester direction is gradually deteriorated the physical property of Sebei Gas Field.This physical property distribution characteristics
Verified by the regularity of distribution of gas well deliverability.
The air water intermediate zone that the distribution of this physical property result in southwestward is thicker (buried depth is more shallow), therefore the gas of Sebei Gas Field
The low feature in the high northeast in southwest is totally presented in water termination.
(4) to the meaning of water distribution feature in layer
Recognized by static water-gas distribution simulated experiment, because Sebei Gas Field construction is gentle, air water caused by gravity point
Different phenomenon is not notable, therefore gas bearing boundary and subsurface contour overlap that degree is poor, and this phenomenon is especially embodied in southwest
Direction.In addition, do not advised by physical difference master control air water intermediate zone height into caused by hiding under-inflation, and capillary force difference
Then, the distinctive initial water-gas distribution feature of Sebei Gas Field is formd, for example, also likely to be present part in the middle high-order bit of gas sand body
Layer inner aqueous layer.
2nd, the hydrodynamic force origin cause of formation experimental study of tilted gas-water contact is as follows：
(1) experimental principle
Using uniform back-up sand scheme, influence of the heterogeneous physical property to gas-water interface is avoided, unidirectional stream is manufactured in model bottom
Dynamic, then the discrepancy in elevation of gas-water interface will embody the flowing pressure gradient of bottom water.
(2) Germicidal efficacy
In static experiment, hydrostatic liquid level is consistent, due to physical difference cause intermediate zone occur significant difference, and
In this experiment, physical property is consistent, and hydrodynamic factor directly results in hydrostatic liquid level and significant difference occurs.
(3) experiment and actual consistency analysis
In simulated experiment, water column high 2m generates 13cm in sandpack column gas-water interface in 40cm length is high
Difference, the flowing pressure gradient of conversion is 0.325m water columns/m, and experiment test flow velocity is 1.123m/d.
Stratum caused by the actual gas-water interface discrepancy in elevation, which is converted, according to dynamic similarity principle adds flow velocity：Puckery northern No.1 reservoir gas
The high northeast in water termination southwest is low, and 0.4~0.65 ° of gas-water interface inclination angle, 29km is apart from gas-water interface discrepancy in elevation 36m, the flowing of conversion
Barometric gradient is 0.001m water columns/m, and according to Darcy linear stream formula, the flow velocity under identical mobility in actual formation is 0.004m/
D, it can be neglected relative to flow velocity in reservoir during gas field development.As shown in table 1.
The non-homogeneous water enchroachment (invasion) distance test data of table 1
The weak feature in the strong north in south be present in Caidamu Basin ground water system, but due to stratum water in reservoir rock mobility very
Difference, flow resistance is very big, and simultaneously orienting infiltration stream is not present in the stratum water at gas reservoir buried depth.
From water-gas distribution, Sebei Gas Field is implicitly present in a large amount of side water, but is analyzed from the fluid ability of stratum water, nothing
By the rock core measurement for being laboratory, it is the flow of formation water barometric gradient calculated based on the current gas-water interface discrepancy in elevation, all shows puckery
The side water connectedness in northern gas field is very poor, and the water enchroachment (invasion) otherness in each orientation can not possibly be caused, the master of water enchroachment (invasion) by natural water body energy
Control factor is the mining rate of in-place permeability and gas reservoir.
Described above is only to preferred embodiment of the present utility model, not the utility model is made any formal
Limitation, it is every according to the technical essence of the utility model to any simple modification made for any of the above embodiments, equivalent variations with
Modification, is belonged in the range of technical solutions of the utility model.
Claims (4)
- A kind of 1. gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation, it is characterised in that the gas reservoir tilted gas-water contact into Because analogue experiment installation is provided with：Back-up sand case；The back-up sand case is laterally divided into the equidistant Inner rooms of 5 connections；Separated between equidistant interior room by dividing plate；The biside plate bottom of the back-up sand case is provided with inlet opening and apopore.
- 2. gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation as claimed in claim 1, it is characterised in that the back-up sand case Top is provided with removable cover.
- 3. gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation as claimed in claim 1, it is characterised in that described equidistant interior Separated between room by dividing plate, the position away from below dividing plate 20mm is provided with through hole.
- 4. gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation as claimed in claim 1, it is characterised in that the inlet opening It is connected with apopore with outside by U-tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721032799.8U CN207073412U (en) | 2017-08-17 | 2017-08-17 | A kind of gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721032799.8U CN207073412U (en) | 2017-08-17 | 2017-08-17 | A kind of gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation |
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| Publication Number | Publication Date |
|---|---|
| CN207073412U true CN207073412U (en) | 2018-03-06 |
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| CN201721032799.8U Expired - Fee Related CN207073412U (en) | 2017-08-17 | 2017-08-17 | A kind of gas reservoir tilted gas-water contact origin cause of formation analogue experiment installation |
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| CN (1) | CN207073412U (en) |
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2017
- 2017-08-17 CN CN201721032799.8U patent/CN207073412U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180306 Termination date: 20200817 |