CN106285593A - Horizontal well steam drives physical model and experimental technique - Google Patents
Horizontal well steam drives physical model and experimental technique Download PDFInfo
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- CN106285593A CN106285593A CN201510362196.3A CN201510362196A CN106285593A CN 106285593 A CN106285593 A CN 106285593A CN 201510362196 A CN201510362196 A CN 201510362196A CN 106285593 A CN106285593 A CN 106285593A
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Abstract
The invention discloses a kind of horizontal well steam and drive physical model and experimental technique, wherein physical model includes: model ontology, and it is cuboid, and the length of this model ontology determines through scaled down according to physical length and the width of the single well pattern of mining site with width；If dry temperature sensor, it is arranged on the bottom of model ontology uniformly；And four pit shafts, having slot on the barrel of pit shaft, each pit shaft correspondence is arranged on the corner location inside of model ontology and then forms well pattern structure, and each pit shaft is arranged along the width of model ontology, and the heel of each pit shaft connect with extraneous injected system, the toe-end closing of each pit shaft；Wherein the size of well pattern structure determines according to horizontal well length, well spacing and the array pitch scaled down that mining site is actual, and the dimension scale determining well pattern structure is consistent with the dimension scale of width with the length determining model ontology.This physical model can simulate the development features that steam under the conditions of different well pattern form drives.
Description
Technical field
The present invention relates to oil-gas field development experiment field, drive physical model particularly to a kind of horizontal well steam
And experimental technique.
Background technology
Thick oil steam drive physical modeling mainly includes one-dimensional, two-dimentional, three-dimensional physical simulation.One-dimensional physics mould
Plan is to carry out steam at single tube or two-tube displacement test device to drive experiment, under the conditions of the different steam of research drives
Improve thick oil recovery ratio mechanism, reasonable process parameter is optimized.The experiment of two dimension, three-dimensional physical simulation
It is possible not only to carry out axial displacement, plane, longitudinal displacement rule can be specified simultaneously.
Prior art has following achievement in research:
The mode utilizing High Temperature High Pressure ratio physical simulating device research straight well steam injection horizontal well production turns steam
Assisted gravity drainage development mecha-nism；
Utilize original steam flooding three-dimensional physical simulation pilot system, carry out the horizontal fracture-steaming of super-heavy oil deposit
Vapour assisted gravity drainage (FSAGD) indoor physical simulation is tested；
Utilization indoor are one-dimensional, the three-dimensional physical simulation experimental system research heavy crude reservoir steam injection later stage turns fireflood
The mechanism of exploitation and relevant problem of reservoir engineering；
Two-dimensional physical analogue experiment installation is utilized to carry out special thick oil horizontal well and straight well combination thermal recovery and super-viscous oil
Dual horizontal well SAGD (SAGD) 3 d scale physical simulation experiment is studied；
Set up ratio physical model according to principle of similitude design, carry out SAGD ratio physical simulation experiment,
Formation and growth course, the production feature of vapor chamber in thin layer viscous crude dual horizontal well SAGD exploitation are inquired into
And development effectiveness, also carried out straight well note straight well adopt, straight well water filling horizontal well adopt with horizontal well note straight well adopt
Three-dimensional physical simulation experimentation under various combination mode.
At present, two dimension, 3 d scale physics are used in steam-drive process, SAGD process, fireflood process
Experiment carried out by model, and experimentation uses straight well steam injection horizontal well production, horizontal well steam injection horizontal well production
Deng different modes, but it does not have occur making for well pattern form physical models different in steam-drive process
And experimental technique.
The information disclosing this background section is merely intended to increase the understanding of the general background to the present invention,
And be not construed as recognizing or imply in any form that this information structure is for persons skilled in the art
Known prior art.
Summary of the invention
It is an object of the invention to provide a kind of horizontal well steam and drive physical model and experimental technique, by building
The vertical physical model that can simulate different well pattern form, simulation different well pattern form (row well pattern, 5 points
Well pattern, inverted nine-spot pattern) under the conditions of the development features driven of steam.
For achieving the above object, the invention provides a kind of horizontal well steam and drive physical model, including: mould
Type body, it is cuboid, and the length of this model ontology and width are according to the actual (tube) length of the single well pattern of mining site
Degree and width determine through scaled down；If dry temperature sensor, it is arranged on model ontology uniformly
Bottom；And four pit shafts, the barrel of pit shaft has slot, each pit shaft correspondence is arranged on model originally
The corner location of body is internal and then forms well pattern structure, and each pit shaft is arranged along the width of model ontology,
And the heel of each pit shaft connect with extraneous injected system, the toe-end closing of each pit shaft；Wherein well pattern knot
The size of structure determines according to horizontal well length, well spacing and the array pitch scaled down that mining site is actual, determines well
The dimension scale of web frame is consistent with the dimension scale of width with the length determining model ontology.
Preferably, the long ratio wide with seam of seam of pit shaft is 10:1, the axial slit length of pit shaft and kerf spacing
Ratio is 2:1, and the kerf spacing of pit shaft circumferential section is 5:1 with the wide ratio of seam.
Preferably, adjacent temperature sensor is less than the 1/10 of model ontology width in the distance of in-plane.
Present invention also offers a kind of horizontal well steam utilizing above-mentioned any one claim and drive physics mould
The physical experimental method of type, comprises the steps:
Step 1, selects row well pattern modeling scheme, determines four pit shafts according to this row well pattern modeling scheme
Installation site so that determine injection well and producing well；
Step 2, carries out model back-up sand, model ontology is warming up to experimental temperature and stablizes and full producing well
Oily with experiment, and rise high pressure to experimental pressure；
Step 3, injects high-temperature steam to injecting well with constant speed, the production fluid of producing well is loaded graduated cylinder
In；
Step 4, experiment terminates, and clears up whole experimental system；
Step 5, reads the crude oil amount in graduated cylinder and the water yield respectively, calculates final oil displacement efficiency；
Step 6, selects five-spot pattern modeling scheme, determines four pit shafts according to this five-spot pattern modeling scheme
Installation site so that determine injection well and producing well, then repeat step 2 to 5；
Step 7, selects inverted nine-spot pattern modeling scheme, determines four according to this inverted nine-spot pattern modeling scheme
The installation site of pit shaft and then determine injection well and producing well, then repeats step 2 to 5；And
Step 8, determines reality according to the contrast of the final oil displacement efficiency in step 5, step 6 and step 7
Pattern of well.
Preferably, in row well pattern modeling scheme, two producing wells or two injection wells are respectively at model
The upper bottom of the side of body.
Preferably, in five-spot pattern modeling scheme, two producing wells or two injection wells are respectively at model
The diagonal positions of body.
Preferably, in inverted nine-spot pattern modeling scheme, injection well is in a jiao of model ontology, and three
Individual producing well is respectively at other triangles of model ontology.
Compared with prior art, there is advantages that the horizontal well steam of the present embodiment drives
Physical model and experimental technique can be carried out thick oil horizontal well steam and drive different well pattern form physical modeling in fact
Test, it is thus achieved that temperature field development characteristics that under the conditions of varying level well pattern, steam drives and oil displacement efficiency.Its experiment
Result can obtain thick oil horizontal well steam and drive optimization well pattern form, provides theory for mining site conceptual design
Support, and simple to operate.
Accompanying drawing explanation
Fig. 1 is the structural representation that the horizontal well steam according to the present invention drives physical model；
Fig. 2 is the schematic side view that the horizontal well steam according to the present invention drives physical model；
Fig. 3 is the design of physical model figure of row well pattern in the present invention；
Fig. 4 is the design of physical model figure of five-spot pattern in the present invention；
Fig. 5 is the design of physical model figure of inverted nine-spot pattern in the present invention；
Fig. 6 is row well pattern in the present invention, five-spot pattern and inverted nine-spot pattern recovery percent of reserves comparison diagram；
Fig. 7 is row well pattern difference displacement time-temperature field variation diagram in the present invention；
Fig. 8 is five-spot pattern difference displacement time-temperature field variation diagram in the present invention；
Fig. 9 is inverted nine-spot pattern difference displacement time-temperature field variation diagram in the present invention.
Main Reference Numerals illustrates:
1-model ontology, 2-pit shaft, 3-temperature sensor.
Detailed description of the invention
Below in conjunction with the accompanying drawings, the detailed description of the invention of the present invention is described in detail, it is to be understood that this
The protection domain of invention is not limited by detailed description of the invention.
Explicitly indicate that unless otherwise other, otherwise in entire disclosure and claims, term " bag
Include " or its conversion as " comprising " or " including " etc. will be understood to comprise stated element or
Ingredient, and do not get rid of other element or other ingredient.
As shown in Figures 1 and 2, physics is driven according to a kind of horizontal well steam of the specific embodiment of the invention
Model, including: if model ontology 1 dry temperature sensor 3 and four pit shafts 2.Wherein model ontology
1 is cuboid, and the length of this model ontology 1 and width are according to the physical length of the single well pattern of mining site and width
Determine through scaled down.If dry temperature sensor 3 is arranged on the bottom (ginseng of model ontology 1 uniformly
See Fig. 2).Having slot on the barrel of four pit shafts 2, each pit shaft correspondence is arranged on model ontology 1
Corner location is internal and then forms well pattern structure, and each pit shaft 2 is arranged along the width of model ontology 1
(seeing Fig. 1), and the heel (A of each pit shaft 21、A2、A3And A4) connect with extraneous injected system,
Toe-end (the B of each pit shaft 21、B2、B3And B4) close.Wherein the size of well pattern structure (sees figure
1) determine according to horizontal well length, well spacing and the array pitch scaled down that mining site is actual, determine well pattern structure
Dimension scale consistent with the dimension scale of width with the length determining model ontology 1.
As a kind of preferred embodiment, the long ratio wide with seam of seam of pit shaft 2 is 10:1, the axle of pit shaft 2
Long to seam and kerf spacing ratio is 2:1, and the kerf spacing of the pit shaft 2 circumferential section ratio wide with seam is 5:1.
As a kind of preferred embodiment, adjacent temperature sensor is less than model originally in the distance of in-plane
The 1/10 of body width.
In such scheme, when determining length and the width of model ontology 1, first obtain the single well pattern of mining site
Put into practice length and width, scaled down, calculate similar proportion chi L, utilize similar proportion chi L, will
Horizontal well length, well spacing and the array pitch scaled down of mining site reality calculate the well pattern size in the present embodiment.
A kind of physical model dimensional parameters being applicable to different well pattern form provided for the present embodiment below:
The size of model ontology is that (H in Fig. 2 is thickness to 38cm × 38cm × 4cm, and wellbore centre line is in
It is in H1/2), four wellbore arrangement are in the position at four angles of model ontology, A1, A2, A3, A4
For the heel of pit shaft, being connected with outside injected system by pipeline, B1, B2, B3, B4 are pit shaft
Toe-end, and close, borehole size is 16cm × φ 0.4cm, A1A2A length of 32cm, B2B3A length of
8cm.Pit shaft uses slot mode completion, stitches a length of 0.5cm, stitches a width of 0.05cm, pit shaft axial slit with
Distance between seam is 0.25cm, and the distance between pit shaft circumferential part parting and seam is 0.24cm.It addition,
It is 3cm bottom temperature sensor distance from top model ontology.
A kind of horizontal well utilizing above-mentioned any one claim according to the specific embodiment of the invention steams
Vapour drives the physical experimental method of physical model, comprises the steps:
Step 1, selects row well pattern modeling scheme, determines four pit shafts according to this row well pattern modeling scheme
Installation site so that determine injection well and producing well；
Step 2, carries out model back-up sand and saturation experiments oil, and rises high pressure to experimental pressure producing well；
Step 3, injects high-temperature steam to injecting well with constant speed, the production fluid of producing well is loaded graduated cylinder
In；
Step 4, experiment terminates, and clears up whole experimental system；
Step 5, reads the crude oil amount in graduated cylinder and the water yield respectively, calculates final oil displacement efficiency；
Step 6, selects five-spot pattern modeling scheme, determines four pit shafts according to this five-spot pattern modeling scheme
Installation site so that determine injection well and producing well, then repeat step 2 to 5；
Step 7, selects inverted nine-spot pattern modeling scheme, determines four according to this inverted nine-spot pattern modeling scheme
The installation site of pit shaft and then determine injection well and producing well, then repeats step 2 to 5；And
Step 8, determines reality according to the contrast of the final oil displacement efficiency in step 5, step 6 and step 7
Pattern of well.
In such scheme, in row well pattern modeling scheme, two producing wells or two injection wells are respectively at
The upper bottom (seeing Fig. 3) of the side of model ontology.In five-spot pattern modeling scheme, two producing wells or
Two injection wells are respectively at the diagonal positions (seeing Fig. 4) of model ontology.Inverted nine-spot pattern simulation side
In case, injection well is in a jiao of model ontology, and three producing wells are respectively at its of model ontology
His triangle (seeing Fig. 5).Finally, as can be seen from Figure 6 the final recovery percent of reserves of row well pattern is the highest,
Drive optimized well pattern form as obtaining thick oil horizontal well steam, provide reason for mining site conceptual design
Opinion supports.
When carrying out above-mentioned three kinds of well pattern physical simulation experiments, if can be detected by dry temperature sensor 3
To the change (seeing Fig. 7 to Fig. 9) in different injection length temperature fields, can be intuitively from Fig. 7 to Fig. 9
Temperature field when finding out three kinds of well pattern physical simulation experiments is with the change of different injection lengths, for theoretical research
Important data are provided.
To sum up, the horizontal well steam of the present embodiment drives physical model and experimental technique can carry out viscous crude level
Well steam drives different well pattern form physical simulation experiment, it is thus achieved that the temperature that under the conditions of varying level well pattern, steam drives
Degree field development characteristics and oil displacement efficiency.Its experimental result can obtain thick oil horizontal well steam and drive optimization well
Web form, provides theory support for mining site conceptual design, and simple to operate.
The aforementioned description to the specific illustrative embodiment of the present invention illustrates that and the purpose of illustration.
These descriptions are not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned
Teaching, can much change and change.The purpose selected exemplary embodiment and describe exists
In explaining the certain principles of the present invention and actual application thereof, so that those skilled in the art can be real
Now and utilize the various different exemplary of the present invention and various different selection and change.
The scope of the present invention is intended to be limited by claims and equivalents thereof.
Claims (7)
1. a horizontal well steam drives physical model, it is characterised in that including:
Model ontology, it is cuboid, and the length of this model ontology and width are according to the single well pattern of mining site
Physical length and width determine through scaled down；
If dry temperature sensor, it is arranged on the bottom of described model ontology uniformly；And
Four pit shafts, the barrel of described pit shaft has slot, and each described pit shaft correspondence is arranged on described
The corner location of model ontology is internal and then forms well pattern structure, and each described pit shaft is along described model ontology
Width arrange, and the heel of each described pit shaft with the external world injected system connect, each described well
The toe-end of cylinder is closed；
The size of wherein said well pattern structure is according to horizontal well length, well spacing and the array pitch geometric ratio of mining site reality
Example reduces and determines, the dimension scale determining described well pattern structure and the length determining described model ontology are with wide
The dimension scale of degree is consistent.
Horizontal well steam the most according to claim 1 drives physical model, it is characterised in that described well
The long ratio wide with seam of seam of cylinder is 10:1, and the axial slit length of described pit shaft and the ratio of kerf spacing are 2:1,
The kerf spacing of described pit shaft circumferential section is 5:1 with the wide ratio of seam.
Horizontal well steam the most according to claim 1 drives physical model, it is characterised in that adjacent temperature
Degree sensor is less than the 1/10 of described model ontology width in the distance of in-plane.
4. the horizontal well steam utilized described in above-mentioned any one claim drives the physics of physical model
Analogue experiment method, it is characterised in that comprise the steps:
Step 1, selects row well pattern modeling scheme, determines four pit shafts according to this row well pattern modeling scheme
Installation site so that determine injection well and producing well；
Step 2, carries out model back-up sand and saturation experiments oil, and rises high pressure to experiment described producing well
Pressure；
Step 3, injects high-temperature steam to described injection well with constant speed, by the production fluid of described producing well
Load in graduated cylinder；
Step 4, experiment terminates, and clears up whole experimental system；
Step 5, reads the crude oil amount in graduated cylinder and the water yield respectively, calculates final oil displacement efficiency；
Step 6, selects five-spot pattern modeling scheme, determines four pit shafts according to this five-spot pattern modeling scheme
Installation site so that determine injection well and producing well, then repeat step 2 to 5；
Step 7, selects inverted nine-spot pattern modeling scheme, determines four according to this inverted nine-spot pattern modeling scheme
The installation site of pit shaft and then determine injection well and producing well, then repeats step 2 to 5；And
Step 8, determines reality according to the contrast of the final oil displacement efficiency in step 5, step 6 and step 7
Pattern of well.
Physical simulation experiment method the most according to claim 4, it is characterised in that described row's shape well
In net modeling scheme, two producing wells or two injection wells are respectively at the upper of the side of described model ontology
The next.
Physical simulation experiment method the most according to claim 4, it is characterised in that described 5 wells
In net modeling scheme, two producing wells or two injection wells are respectively at the diagonal position of described model ontology
Put.
Physical simulation experiment method the most according to claim 4, it is characterised in that described anti-9 points
In well pattern modeling scheme, injection well is in a jiao of described model ontology, and three producing wells are located respectively
Other triangles in described model ontology.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108060918A (en) * | 2018-01-15 | 2018-05-22 | 长安大学 | The device and method that evaluation initial water mobility influences heavy crude reservoir exploitation effect |
| CN109025965A (en) * | 2018-08-31 | 2018-12-18 | 中国石油天然气股份有限公司 | Method for determining permeability lower limit of water flooding development of ultra-low permeability tight reservoir |
| CN109113731A (en) * | 2018-07-16 | 2019-01-01 | 中国石油天然气股份有限公司 | Vertical well and horizontal well combined steam flooding thickened oil exploitation physical simulation system and method |
| CN114544121A (en) * | 2020-11-26 | 2022-05-27 | 中国石油天然气股份有限公司 | Horizontal well pipeline state simulation test platform and horizontal well pipeline vibration simulation device |
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| CN109113731A (en) * | 2018-07-16 | 2019-01-01 | 中国石油天然气股份有限公司 | Vertical well and horizontal well combined steam flooding thickened oil exploitation physical simulation system and method |
| CN109025965A (en) * | 2018-08-31 | 2018-12-18 | 中国石油天然气股份有限公司 | Method for determining permeability lower limit of water flooding development of ultra-low permeability tight reservoir |
| CN114544121A (en) * | 2020-11-26 | 2022-05-27 | 中国石油天然气股份有限公司 | Horizontal well pipeline state simulation test platform and horizontal well pipeline vibration simulation device |
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Application publication date: 20170104 |