CN108717005B - A kind of preparation method of artificial viscous crude sandstone - Google Patents
A kind of preparation method of artificial viscous crude sandstone Download PDFInfo
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- CN108717005B CN108717005B CN201810843252.9A CN201810843252A CN108717005B CN 108717005 B CN108717005 B CN 108717005B CN 201810843252 A CN201810843252 A CN 201810843252A CN 108717005 B CN108717005 B CN 108717005B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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Abstract
The invention discloses a kind of preparation methods of artificial viscous crude sandstone, which comprises the following steps: (1) takes viscous crude and aggregate respectively；(2) viscous crude described in step (1) and aggregate are mixed, after stirring 10min-20min, is cooled down；(3) filter paper soaked in one layer of core mold middle berth with viscous crude, treated that viscous crude sandstone is packed into core mold for the cooling for then obtaining step (2), and core is taken out in compression moulding, is put into thermal shrinkable sleeve preservation.The invention has the benefit that artificial viscous crude sandstone inertia is good, Physicochemical property stabilization, simple production process, it is at low cost, can one-pass molding.
Description
Technical field
The present invention relates to petroleum, natural gas exploration and development field, in particular to a kind of preparation method of artificial viscous crude sandstone.
Background technique
In recent years, the exhaustive exploitation with conventional oil resource and consumption, conventional thin oil reserves are increasingly reduced, viscous crude conduct
Non-conventional oil resource is increasingly taken seriously.Artificial cores physical analogy is to solve scientific research in oilfield explorating developing process to appoint
One of the important means of business needs a large amount of core during entire research.
Heavy crude reservoir often has the characteristics that bury shallow, reservoir loose cementation, using conventional drilling extracting core method at
This height, and the core obtained, substantially at loose sand shape, intensity is small, can not carry out the laboratory measurement of the properties such as the velocity of sound, resistivity.
Therefore, develop artificial viscous crude sandstone for exploration of oil and gas field and development technique research provide experiment support it is imperative.
CN107144452A discloses a kind of preparation method of loose oil-containing artificial sand rock rock core of Guantao group shallow-layer, including such as
Lower step: (1) it takes Guantao group shallow-layer loose sand and with ball mill grinding at powder, then screens out difference with standard inspection sieve
The sand sample of partial size, then weigh the sand sample of different-grain diameter and be uniformly mixed；(2) binder is prepared, stirring makes it after mixing again
Acetone is added；(3) oil emulsion is prepared；(4) by the bonding of addition acetone in the sand sample being uniformly mixed in step (1), step (2)
Oil emulsion in agent, step (3) is mixed and stirred for uniformly to no larger particles；(5) mixture by step (4) preparation is packed into rock
The heart prepares mold, applies pressure compression moulding by hydraulic jack, then sealed with masking foil, In Shade natural air drying,
Obtain oil-containing artificial sand rock rock core；Rock core prepared by this method is existing to be had centainly again with the consistent rock constituents of natural core
Mechanical strength, be able to satisfy rock physicochemical property test request.But this method adds a variety of chemical substances, and inertia is poor, and component is multiple
Miscellaneous, rock core property is unstable.
CN107543744A discloses a kind of artificial rock production method of dispersed shale loose cementation sandstone, including as follows
Step :) weigh certain mass different-grain diameter quartz sand be uniformly mixed, the aggregate as artificial rock；2) kaolin mistake is crushed
Sieve weighs；3) epoxy resin is diluted, dibutyl phthalate (DBP), ethylenediamine, acetone etc. is added and stirs evenly as cementing
Agent；4) quality for calculating the cementing agent in step 3) mixes quartz sand and stirs evenly, laminated quartz sand is made and dries；5) will
Laminated quartz sand sieving in step 4), adds people's clay and suitable water to stir evenly and is prepared into argillaceous laminated quartz sand；6)
By in step 5), argillaceous laminated quartz sand inserts artificial rock press diagenesis mold, and after applying setting pressure, taking-up is dried in the air
It is dry, it drills through, the plunger rock sample that specification of polishing is pine；This method has the good physicochemical properties stabilization of inertia, cheap spy
Point is fabricated to power height.But due to viscous crude sandstone it is loose it is soft, easily deformation occurs and it is damaged, can not be carried out after one-pass molding
The reprocessing of sample, therefore, this method are being prepared in viscous crude sandstone and are being not suitable for.
Artificial cores physical analogy is that one of the important means of scientific research mission is solved in oilfield explorating developing process, entirely
A large amount of core is needed during research, and the core for using conventional drilling extracting core method at high cost, and obtaining is substantially at scattered
Sand-like, intensity is small, can not carry out the laboratory measurement of the properties such as the velocity of sound, resistivity.And the preparation of current artificial rock (heart)
In the presence of a variety of chemical substances are added in the process, cause rock sample (heart) inertia of preparation poor, complicated components, rock core property is unstable；
Viscous crude sandstone it is loose it is soft easily deformation occurs and damaged, the problems such as reprocessing of sample can not be carried out after one-pass molding, Wu Fajin
The laboratory research of row artificial core limits the research and development of exploration of oil and gas field and development technique.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of Physicochemical property stabilization, simple production process, at
This is low, can one-time formed artificial viscous crude sandstone preparation method.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of preparation method of artificial viscous crude sandstone, comprising the following steps:
(1) viscous crude and aggregate are taken respectively；
(2) viscous crude described in step (1) and aggregate are mixed, stirring cools down；
(3) in one layer of filter paper soaked with viscous crude of core mold middle berth, treated for the cooling for then obtaining step (2)
Viscous crude sandstone is packed into core mold, and core is taken out in compression moulding, is put into thermal shrinkable sleeve preservation.
Specifically, aggregate described in step (1) is the one or more of river sand, quartz sand and glass microballoon；Preferably,
The aggregate is the one or two of river sand and quartz sand；It is further preferred that the aggregate is quartz sand.
Specifically, the mass ratio of viscous crude described in step (1) and aggregate is 1:5-20；Preferably, the viscous crude and
The mass ratio of aggregate is 1:8-15；It is further preferred that the mass ratio of the viscous crude and aggregate is 1:9-11.
Specifically, mixing time described in step (2) is 10min-20min.
Specifically, cooling described in step (2) is that the mixture of viscous crude and aggregate after stirring is cooled to -4 DEG C -4
DEG C, and keep 5min-15min；Preferably, the cooling is that the mixture of viscous crude and aggregate after stirring is cooled to -4
DEG C -0 DEG C, and keep 5min-10min；It is further preferred that the cooling is the mixture of the viscous crude and aggregate after stirring
- 4 DEG C are cooled to, and keeps 5min.
Specifically, the filter paper of the wetting of viscous crude described in step (3) is that filter paper is totally immersed into viscous crude, is flattened after pulling out
Suspension is to not oil dripping in 5min.
Specifically, in step (3), the pressure of the compression moulding is 10Mpa-20Mpa, pressing time 2h-24h；
Preferably, the pressure of the compression moulding is 10Mpa-15Mpa, pressing time 2h-12h；It is further preferred that described
The pressure of compression moulding is 12Mpa, pressing time 6h.
It is further preferred that as pressing time >=6h, it is primary every 3h ftercompction.
Specifically, core mold described in step (3) includes pedestal, cylinder cavity and upper end plug, the pedestal
Positioned at cylinder cavity lower part, it is tightly connected by the lower end of the first O-ring on pedestal and cylinder cavity, the upper end
Plug is located at cylinder cavity top, is tightly connected by the upper end of the second O-ring in upper end plug and cylinder cavity.
Specifically, the operating method of core mold described in step (3), comprising the following steps:
1) one layer of filter paper soaked with viscous crude is put on pedestal；
2) by cylinder cavity and pedestal seal combination, after the completion of combination, upper one layer of viscous crude profit is covered in cylinder cavity
Wet filter paper avoids viscous crude sandstone from directly contacting with cylinder cavity；
3) obtained cooling treated viscous crude sandstone is packed into cylinder cavity；
4) upper end plug is covered, compression moulding obtains core；
5) it takes out core: removing pedestal first, then push upper end plug, core sample is ejected from cylinder cavity lower end
?.
A kind of preparation method of artificial viscous crude Sandstone Cores provided by the invention has with following compared with prior art
Beneficial effect:
(1) artificial viscous crude sandstone core inertia of the invention is good, stable in physicochemical property, one-pass molding, and intensity is high, without into
The machining of one step, reduces the risk that sample is damaged by reprocessing, manufacture craft is simple, at low cost.
(2) it is handled using cooling, shortens the high pressure pressing time, reduce energy consumption, improve sample preparation efficiency.
(3) artificial viscous crude sandstone of the invention can substitute the reality that natural viscous crude rock core carries out the properties such as the velocity of sound, resistivity
Research is tested, provides technical support for thickened oil recovery.
Detailed description of the invention
Attached drawing 1 is the combining structure schematic diagram for the core mold that the present invention uses.
In figure, 1, pedestal, 1, cylinder cavity, 3, upper stick harness, the 4, first O-ring, the 5, second O-ring.
Specific embodiment
Illustrate embodiments of the present invention below by way of in conjunction with drawings and concrete examples, those skilled in the art can be by this theory
Other advantages and efficacy of the present invention can be easily understood for content disclosed by bright book.The present invention can also pass through in addition different tools
Body embodiment is embodied or practiced, and the various details in this specification can also not had based on different viewpoints and application
Various modifications or alterations are carried out under spirit of the invention.
Before further describing the specific embodiments of the present invention, it should be appreciated that protection scope of the present invention is not limited to down
State specific specific embodiment；It is also understood that term used in the embodiment of the present invention is specific specific in order to describe
Embodiment, rather than limiting the scope of protection of the present invention.
When embodiment provides numberical range, it should be appreciated that except non-present invention is otherwise noted, two ends of each numberical range
Any one numerical value can be selected between point and two endpoints.Unless otherwise defined, all technologies used herein and section
Technics has and the normally understood identical meaning of general technical staff of the technical field of the invention.
Attached drawing 1 is the combining structure schematic diagram for the core mold that the present invention uses.Core mold of the present invention includes
Pedestal 1, cylinder cavity 2 and upper end plug 3, the pedestal 1 are located at 2 lower part of cylinder cavity, pass through the first O on pedestal 1
The lower end of type circle 4 and cylinder cavity 2 is tightly connected, and the upper end plug 3 is located at 2 top of cylinder cavity, passes through upper end plug 3
On the second O-ring 5 and the upper end of cylinder cavity 2 be tightly connected.
A kind of preparation method of artificial viscous crude sandstone of the invention, comprising the following steps:
(1) viscous crude and aggregate are taken respectively；
(2) viscous crude described in step (1) and aggregate are mixed, after stirring 10min-20min, is cooled down；
(3) prepare core mold: putting one layer of filter paper soaked with viscous crude on pedestal 1 first；Then by cylinder cavity 2
With 1 seal combination of pedestal, after the completion of combination, the filter paper of upper one layer of viscous crude wetting is covered in cylinder cavity 2, avoids viscous crude sandstone
It is directly contacted with cylinder cavity 2；
(4) cooling for obtaining step (2) treated viscous crude sandstone is packed into step (3) ready cylinder cavity 2
It is interior, upper end plug 3 is covered, compression moulding obtains core；
(5) it takes out core: removing pedestal 1 first, then push upper end plug 3, by core sample from 2 lower end of cylinder cavity
Ejection；
(6) core saves: the core of taking-up, is put into thermal shrinkable sleeve preservation.
Specifically, aggregate described in step (1) is the one or more of river sand, quartz sand and glass microballoon；Preferably,
The aggregate is the one or two of river sand and quartz sand；It is further preferred that the aggregate is quartz sand.
Specifically, the mass ratio of viscous crude described in step (1) and aggregate is 1:5-20；Preferably, the viscous crude and
The mass ratio of aggregate is 1:8-15；It is further preferred that the mass ratio of the viscous crude and aggregate is 1:9-11.
Specifically, cooling described in step (2) is that the mixture of viscous crude and aggregate after stirring is cooled to -4 DEG C -4
DEG C, and keep 5min-15min；Preferably, the cooling is that the mixture of viscous crude and aggregate after stirring is cooled to -4
DEG C -0 DEG C, and keep 5min-10min；It is further preferred that the cooling is the mixture of the viscous crude and aggregate after stirring
- 4 DEG C are cooled to, and keeps 5min.
Specifically, the filter paper of the wetting of viscous crude described in step (3) is that filter paper is totally immersed into viscous crude, is flattened after pulling out
Suspension is to not oil dripping in 5min.
Specifically, in step (3), the pressure of the compression moulding is 10Mpa-20Mpa, pressing time 2h-24h；
Preferably, the pressure of the compression moulding is 10Mpa-15Mpa, pressing time 2h-12h；It is further preferred that described
The pressure of compression moulding is 12Mpa, pressing time 6h.
It is further preferred that as pressing time >=6h, it is primary every 3h ftercompction, to guarantee the stabilization of pressure, improve
The quality and success rate of core production.
Embodiment 1
A kind of preparation method of artificial viscous crude sandstone of the invention, comprising the following steps:
(1) viscous crude and quartz sand are taken respectively by the mass ratio of 1:8；
(2) viscous crude described in step (1) and quartz sand are mixed, after stirring 10min-20min, is kept at 0 DEG C
10min carries out cooling processing；
(3) prepare core mold: putting one layer of filter paper soaked with viscous crude on pedestal 1 first；Then by cylinder cavity 2
With 1 seal combination of pedestal, after the completion of combination, the filter paper of upper one layer of viscous crude wetting is covered in cylinder cavity 2, avoids viscous crude sandstone
It is directly contacted with cylinder cavity 2；
(4) cooling for obtaining step (2) treated viscous crude sandstone is packed into step (3) ready cylinder cavity 2
It is interior, upper end plug 3 is covered, compression moulding obtains core；
(5) it takes out core: removing pedestal 1 first, then push upper end plug 3, by core sample from 2 lower end of cylinder cavity
Ejection；
(6) core saves: the core of taking-up, is put into thermal shrinkable sleeve preservation.
Specifically, the filter paper of the wetting of viscous crude described in step (3) is that filter paper is totally immersed into viscous crude, is flattened after pulling out
Suspension is to not oil dripping in 5min.
Specifically, the pressure of compression moulding described in step (4) is 10Mpa, pressing time 12h, every 3h ftercompction
Once.
Embodiment 2
A kind of preparation method of artificial viscous crude sandstone of the invention, comprising the following steps:
(1) viscous crude and river sand are taken respectively by the mass ratio of 1:9；
(2) viscous crude described in step (1) and river sand are mixed, after stirring 10min-20min, is kept at 4 DEG C
15min carries out cooling processing；
(3) prepare core mold: putting one layer of filter paper soaked with viscous crude on pedestal 1 first；Then by cylinder cavity 2
With 1 seal combination of pedestal, after the completion of combination, the filter paper of upper one layer of viscous crude wetting is covered in cylinder cavity 2, avoids viscous crude sandstone
It is directly contacted with cylinder cavity 2；
(4) cooling for obtaining step (2) treated viscous crude sandstone is packed into step (3) ready cylinder cavity 2
It is interior, upper end plug 3 is covered, compression moulding obtains core；
(5) it takes out core: removing pedestal 1 first, then push upper end plug 3, by core sample from 2 lower end of cylinder cavity
Ejection；
(6) core saves: the core of taking-up, is put into thermal shrinkable sleeve preservation.
Specifically, the filter paper of the wetting of viscous crude described in step (3) is that filter paper is totally immersed into viscous crude, is flattened after pulling out
Suspension is to not oil dripping in 5min.
Specifically, the pressure of compression moulding described in step (4) is 20Mpa, and the pressing time is for 24 hours, every 3h ftercompction
Once.
Embodiment 3
A kind of preparation method of artificial viscous crude sandstone of the invention, comprising the following steps:
(1) viscous crude and quartz sand are taken respectively by the mass ratio of 1:10；
(2) viscous crude described in step (1) and quartz sand are mixed, after stirring 10min-20min, is kept at 4 DEG C
15min carries out cooling processing；
(3) prepare core mold: putting one layer of filter paper soaked with viscous crude on pedestal 1 first；Then by cylinder cavity 2
With 1 seal combination of pedestal, after the completion of combination, the filter paper of upper one layer of viscous crude wetting is covered in cylinder cavity 2, avoids viscous crude sandstone
It is directly contacted with cylinder cavity 2；
(4) cooling for obtaining step (2) treated viscous crude sandstone is packed into step (3) ready cylinder cavity 2
It is interior, upper end plug 3 is covered, compression moulding obtains core；
(5) it takes out core: removing pedestal 1 first, then push upper end plug 3, by core sample from 2 lower end of cylinder cavity
Ejection；
(6) core saves: the core of taking-up, is put into thermal shrinkable sleeve preservation.
Specifically, the filter paper of the wetting of viscous crude described in step (3) is that filter paper is totally immersed into viscous crude, is flattened after pulling out
Suspension is to not oil dripping in 5min.
Specifically, the pressure of compression moulding described in step (4) is 20Mpa, and the pressing time is for 24 hours, every 3h ftercompction
Once.
Embodiment 4
A kind of preparation method of artificial viscous crude sandstone of the invention, comprising the following steps:
(1) viscous crude and quartz sand are taken respectively by the mass ratio of 1:11；
(2) viscous crude described in step (1) and quartz sand are mixed, after stirring 10min-20min, is kept at -4 DEG C
5min carries out cooling processing；
(3) prepare core mold: putting one layer of filter paper soaked with viscous crude on pedestal 1 first；Then by cylinder cavity 2
With 1 seal combination of pedestal, after the completion of combination, the filter paper of upper one layer of viscous crude wetting is covered in cylinder cavity 2, avoids viscous crude sandstone
It is directly contacted with cylinder cavity 2；
(4) cooling for obtaining step (2) treated viscous crude sandstone is packed into step (3) ready cylinder cavity 2
It is interior, upper end plug 3 is covered, compression moulding obtains core；
(5) it takes out core: removing pedestal 1 first, then push upper end plug 3, by core sample from 2 lower end of cylinder cavity
Ejection；
(6) core saves: the core of taking-up, is put into thermal shrinkable sleeve preservation.
Specifically, the filter paper of the wetting of viscous crude described in step (3) is that filter paper is totally immersed into viscous crude, is flattened after pulling out
Suspension is to not oil dripping in 5min.
Specifically, the pressure of compression moulding described in step (4) is 12Mpa, pressing time 6h, every 3h ftercompction one
It is secondary.
The artificial viscous crude sandstone that embodiment 1-4 is obtained carries out velocity of sound experiment, and experimental result is as shown in table 1.
The velocity of sound experimental data of table 1, artificial viscous crude sandstone
By table 1 it can be found that artificial viscous crude sandstone of the invention can complete the experiment of the velocity of sound under condition of different temperatures, together
When, the data such as velocity of longitudinal wave, shear wave velocity and P-S wave velocity ratio of the artificial viscous crude sandstone of the present invention and natural viscous crude sandstone
The order of magnitude of sound velocity data matches, it was demonstrated that artificial viscous crude sandstone of the invention, which can be very good to substitute natural viscous crude sandstone, to be used for
Sound Velocity Measurements provide technical support for thickened oil recovery.
Claims (7)
1. a kind of preparation method of artificial viscous crude sandstone, which comprises the following steps:
(1) viscous crude and aggregate are taken respectively；The mass ratio of the viscous crude and aggregate is 1:5-20;
(2) viscous crude as described in step (1) and aggregate are mixed, stirring cools down；
The cooling is the mixture of viscous crude and aggregate after stirring to be cooled to -4 DEG C -4 DEG C, and keep 5min-15min;
(3) filter paper soaked in one layer of core mold middle berth with viscous crude, the cooling for then obtaining step (2) treated viscous crude
Sandstone is packed into core mold, and core is taken out in compression moulding, is put into thermal shrinkable sleeve preservation;
The pressure of the compression moulding is 10Mpa -20Mpa, pressing time 2h-24h.
2. preparation method according to claim 1, which is characterized in that aggregate as described in step (1) is river sand, quartz sand
It is one or more with glass microballoon.
3. preparation method according to claim 1, which is characterized in that mixing time 10min- described in step (2)
20min。
4. preparation method according to claim 1, which is characterized in that viscous crude described in step (3) wetting filter paper be
Filter paper is totally immersed into viscous crude, flattening suspension is to not oil dripping in 5min after pulling out.
5. preparation method according to claim 1, which is characterized in that primary every 3h ftercompction as pressing time >=6h.
6. preparation method according to claim 1, which is characterized in that core mold described in step (3) include pedestal,
Cylinder cavity and upper end plug, the pedestal are located at cylinder cavity lower part, pass through the first O-ring and cylindrical type on pedestal
The lower end of cavity is tightly connected, and the upper end plug is located at cylinder cavity top, passes through the second O-ring and circle in upper end plug
The upper end of column type cavity is tightly connected.
7. preparation method according to claim 6, which is characterized in that the operating method of the core mold, including it is following
Step:
1) one layer of filter paper soaked with viscous crude is put on pedestal；
2) by cylinder cavity and pedestal seal combination, after the completion of combination, upper one layer of viscous crude wetting is covered in cylinder cavity
Filter paper avoids viscous crude sandstone from directly contacting with cylinder cavity；
3) obtained cooling treated viscous crude sandstone is packed into cylinder cavity；
4) upper end plug is covered, compression moulding obtains core；
5) it takes out core: removing pedestal first, then push upper end plug, ejection is from cylinder cavity lower end by core sample
It can.
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| CN109540974B (en) * | 2018-12-10 | 2019-11-05 | 青岛海洋地质研究所 | Hydrate core sample test macro and its application method |
| CN111829843B (en) * | 2019-04-19 | 2024-05-31 | 中国石油化工股份有限公司 | Method for preparing sand bay group loose heavy oil sandstone core by using drill cuttings |
| CN111610081B (en) * | 2020-05-09 | 2021-08-24 | 中国科学院地质与地球物理研究所 | Artificial rock core and manufacturing method thereof |
| CN114002123B (en) * | 2021-10-29 | 2024-05-10 | 中国海洋石油集团有限公司 | Loose hypotonic sandstone particle migration experimental method |
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| CN1269761C (en) * | 2004-05-19 | 2006-08-16 | 郭勇 | Artificial float stone and its manufacturing method |
| CN201819863U (en) * | 2010-09-08 | 2011-05-04 | 中国海洋石油总公司 | Microcosmic visual test device for sand production of oil reservoir |
| CN203465126U (en) * | 2013-08-05 | 2014-03-05 | 中国海洋石油总公司 | Production device for sand mixed rock sample |
| CN103979835B (en) * | 2014-06-05 | 2017-02-15 | 甘肃畅陇公路养护技术研究院有限公司 | Preparation method of polymer modified asphalt concrete for paving normal-temperature steel structure |
| CN107543744A (en) * | 2016-06-23 | 2018-01-05 | 韦献艺 | A kind of artificial rock preparation method of dispersed shale loose cementation sandstone |
| CN106596223B (en) * | 2016-12-12 | 2020-04-21 | 西南石油大学 | Preparation method of rock core for dense conglomerate oil displacement |
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