CN106596223A - Production method of rock core for compact gravel rock oil displacement - Google Patents
Production method of rock core for compact gravel rock oil displacement Download PDFInfo
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- CN106596223A CN106596223A CN201611138822.1A CN201611138822A CN106596223A CN 106596223 A CN106596223 A CN 106596223A CN 201611138822 A CN201611138822 A CN 201611138822A CN 106596223 A CN106596223 A CN 106596223A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N1/36—Embedding or analogous mounting of samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N1/38—Diluting, dispersing or mixing samples
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/364—Embedding or analogous mounting of samples using resins, epoxy
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N1/36—Embedding or analogous mounting of samples
- G01N2001/366—Moulds; Demoulding
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N1/38—Diluting, dispersing or mixing samples
- G01N2001/386—Other diluting or mixing processes
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- Curing Cements, Concrete, And Artificial Stone (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a production method of a rock core for . The method comprises the following steps: 1, mixing quartz sands with a certain particle size, clay mineral and cementing agent powder in proportion; 2, assembling a die; 3, moistening the die: spraying 3 mg of target stratum layer on a lower surface to be in contact with sands by a fine water sprayer before filling the die with the sands; 4, leveling the sands: weighing the above obtained quartz sand mixture accounting for 1/N of the volume of the die, filling the die with the weighed mixture, moving a leveling tool in the die along a horizontal direction, and pressing the leveled mixture with a press block; 5, stabilizing the pressure of the filled die for 15 min, and releasing the pressure; 6, repeating step 3 to step 5 until the die is full; 7, placing the integral rock core die in an incubator, and baking the integral rock core die; and 8, demolding the die. The large-size compact rock core is produced in the invention, has small dead aperture, optimizes a situation that experiments only dependents on core taking of compact sand rocks and no artificial rock cores exist, and provides help for development of nonconventional oil and gas fields.
Description
Technical field
The present invention relates to a kind of tight sandy gravel displacement of reservoir oil rock core preparation method, belongs to artificial core and its technology of preparing neck
Domain.
Background technology
The energy exploration reserves that unconventionaloil pool hides (tight sand) are huge, and by wide concern is sent out, for its exploitation also into
For the Major research field of current problem.Due to the uniqueness of its reservoir, conventional meanses effectively, can not be produced out efficiently
Send out, rational development plan is the basis of oil-gas field development, and necessary/accurate interior is the basis in basis, therefore, for
The rock core of the basis of in-house laboratory investigation-simulation oil reservoir makes, most important.
Research now at present with regard to rock core making is numerous, but majority is the rock core making based on conventional oil gas reservoir,
Such as dermatitis husband teaches in " technology of the quartz sand epoxy resin cementitious artificial core and application " document made with regard to rock core and explains
State all types of rock cores to make, these are mainly also based on for the conventional geology reservoir of Daqing oil field.
For only Wu Songtao in the making design of tight sand, a kind of warm-pressing double-control densification artificial sand rock rock core and its system
Preparation Method, publication number is CN104931312A, and he employs 300 degree of high temperature, high pressure 220MPa to make rock core, disclosure satisfy that institute
Need the porosity and permeability of rock core.Then the porosity and permeability that reaching design needs only makes the head of compact rock core
Want problem, Next major issue is made rock core size, using above-mentioned manufacture method, can not molding more substantially
Long-pending compact rock core.If being only that size isWithShort rock core, under the conditions of bottom outlet is hypotonic, pore volume is extremely limited
(the such as rock core of 10cm length, pore volume only has several ml), so for oil displacement experiment, the reality of recovery ratio/moisture content
Testing error can just directly affect conclusion；Injection pressure is still presented growth and goes down under conditions of complete water drive involves.Three
The main important parameter for characterizing oil displacement efficiency/displacement characteristics can not be showed effectively at all.
For this purpose, needing design a kind of more preferably model and manufacture method with tight sand rock core for the displacement of reservoir oil.
The content of the invention
To solve technical problem of the prior art, the present invention provides a kind of tight sandy gravel displacement of reservoir oil rock core preparation side
Method, the method primarily to the displacement characteristics of in-house laboratory investigation tight sandy gravel oil reservoir and manufacture artificial core, Neng Gouman
The indoor indoor displacement test with regard to tight sandstone reservoir type of foot is studied.
The present invention solves the technical scheme that adopted of above-mentioned technical problem：A kind of tight sandy gravel displacement of reservoir oil is prepared with rock core
Method, the method is comprised the following steps：
(1) dispensing:The quartz sand of certain particle diameter, clay mineral and cement powders are mixed in proportion, stirring is equal
It is even, obtain quartz sand mixture；
(2) assembly jig：Mould is mainly made up of base plate, side plate, briquetting, and wherein base plate, side plate, briquetting are steel plate,
Inner wall surface roughness Ra≤0.025 μm, square rock core mould size：Length × width × height=305mm × 92mm × 92mm；
(3) mould moistening：Before to mould back-up sand, the lower surface that will be contacted to sand body with fine fountain head sprays into purpose
Stratum water 3mg, and uniform fold；
(4) even sand：The quartz sand mixture for weighing 1/N mould volumes loads in the mould after moistening, is existed with instrument is struck off
Moves back and forth in the horizontal direction in mould, until quartz sand mixture surfacing, finally with briquetting by quartz sand mixture pressure
Firmly；
(5) it is compacted：The mould for having loaded is placed on predetermined four-column hydraulic press, under the conditions of pressing pressure 80MPa
After precompressed 5min, press voltage stabilizing release after 80MPa, voltage stabilizing 15min is controlled again；
(6) repeat step (3)～(5) to fill up to mould, wherein when per a many repeat step (5), step
(5) pressure increases 10MPa；
(7) molding：Rock core mould with briquetting is integrally put in calorstat, is toasted under alternating temperature, timing condition, dried
100 DEG C of roasting temperature and time, 240min → 130 DEG C, 30min → 210 DEG C, 10min → natural cooling；
(8) demoulding：Rock core mould after molding is placed on four-column hydraulic press fixed position, compacting briquetting makes rock core from mould
Abjection in tool obtains rock core.
It is further that the cementing agent in the step (1) is mainly made up of the component of following mass percent：Firming agent
9～20%, levelling agent 1～5%, barium sulfate 0.5～1%, balance of epoxy resin and polyester, its epoxy resin and polyester
Mass percent is 1:1.
It is further, the particle size content one of the particle size content corresponding relation of cementing agent and quartz sand in the step (1)
Cause.
It is further that the base plate and side plate middle pad in the step (2) in mould adds high temperature resistance thin film.
It is further that quartz sand mixture to load and release quartz sand mixing with even sand device after mould in the step (4)
The bridging plug of thing, makes quartz sand mixture form closely point contact each other.
It is further, can simultaneously to equipped with quartz sand during compacting quartz sand mixture in the step (5)
Mould discharge 90HZ～150HZ ultrasound wave.
Beneficial effects of the present invention：The present invention has prepared the compact rock core of large volume, and the rock core has stagnant pore little
Advantage, and optimize tight sand and only test by coring in laboratory experiment, and the blank without artificial core is unconventionaloil pool
Field exploitation provides help.
Specific embodiment
The specific embodiment of the present invention is further described with reference to embodiment, not therefore by present invention limit
System is among described scope of embodiments.
A kind of tight sandy gravel displacement of reservoir oil of the present invention uses rock core preparation method, the method to comprise the following steps：
(1) dispensing:The quartz sand of certain particle diameter, clay mineral and cement powders are mixed in proportion, stirring is equal
It is even, obtain quartz sand mixture；According to characteristics of reservoirs, the drainage screen of different meshes screens the quartz sand particle of required size, takes
With powder cementing agent (particle diameter distribution is 75 μm～100 μm), clay mineral determines grain according to sandstone reservoir lithology mineral content quantitative
Footpath weighs；
Wherein cementing agent is mainly made up of the component of following mass percent：Firming agent 9～20%, levelling agent 1～5%,
The mass percent of barium sulfate 0.5～1%, balance of epoxy resin and polyester, its epoxy resin and polyester is 1:1.Quartz
Sand is 5～12.5 with the consumption mass ratio of cementing agent:1.
Particle size content corresponding relation (such as mesh of sand body 20 consistent with the particle size content of quartz sand of cementing agent：120 mesh=5：
The mesh of 1=cementing agent 80：180 mesh) because the gluing/setting capacity of the cementing agent under the conditions of being somebody's turn to do is stronger, because the part of quartz sand
Sand body particle size is larger, the adhesive of conventional formulation not necessarily can it is gluing live sand grains, suitable particle diameter ratio can be more reasonable
Collocation contact, it is all meticulous that stagnant pore can be caused to increase.
(2) assembly jig：Mould is mainly made up of base plate, side plate, briquetting, and wherein base plate, side plate, briquetting are steel plate,
Inner wall surface roughness Ra≤0.025 μm, square rock core mould size：Length × width × height=305mm × 92mm × 92mm；
The base plate and side plate middle pad of mould adds high temperature resistance thin film, its objective is the injury for avoiding knockout course to rock core bottom；
Above-mentioned mould latus inframedium is overall ring wall, and with globality, side plate, base plate and briquetting polish coarse on surface,
To promote agreeing with for core particle and mould；And the pressed surface of briquetting has steam vent, it is to avoid tamp process rock core cavity
Interior output gas impacts core particle and cement particle, changes the granule contact relation after mix homogeneously.
(3) mould moistening：Before to mould back-up sand, the lower surface that will be contacted to sand body with fine fountain head sprays into purpose
Stratum water 3mg, and uniform fold；Its purpose is to adsorb the quartz sand mixture that will be inserted, reduce upper surface cementing agent
Contact with briquetting, finally avoids a large amount of aggregations on the contact surface from forming stagnant pore；
(4) even sand：The quartz sand mixture for weighing 1/N mould volumes loads in the mould after moistening, is released with even sand device
The bridging plug of quartz sand mixture, makes quartz sand mixture form closely point contact each other, then with striking off instrument in mould
Move back and forth in the horizontal direction, until quartz sand mixture surfacing, finally pushed down quartz sand mixture with briquetting；
(5) it is compacted：The mould for having loaded is placed on predetermined four-column hydraulic press, under the conditions of pressing pressure 80MPa
After precompressed 5min, press voltage stabilizing release after 80MPa, voltage stabilizing 15min is controlled again；During compacting quartz sand mixture
Simultaneously the ultrasound wave of 90HZ～150HZ can be discharged to the mould equipped with quartz sand, under high pressure, this wavelength ultrasound wave, Ke Yiyou
The vertical migration promoted between granule of effect, forces contact even closer；
(6) repeat step (3)～(5) to fill up to mould, wherein when per a many repeat step (5), step
(5) pressure increases 10MPa, and the gradient type supercharging that briquetting incorporates under the high temperature oven-pressure condition on mould is many rounds
Experimental result, in order to keep on vertical one straightforward；The cementing agent paid after so repeatedly tamping on briquetting surface also can be
The superiors' core surface, so per layer of cementing agent is relatively uniform, vertically upward with uniformity；
(7) molding：Rock core mould with briquetting is integrally put in calorstat, is toasted under alternating temperature, timing condition, dried
100 DEG C of roasting temperature and time, 240min → 130 DEG C, 30min → 210 DEG C, 10min → natural cooling；
(8) demoulding：Rock core mould after molding is placed on four-column hydraulic press fixed position, compacting briquetting makes rock core from mould
Abjection in tool obtains rock core, and the rock core for obtaining is smaller in size than the artificial core of 305mm × 92mm × 92mm, using liquid nitrogen cutting machine
Further modification rock core fixes its size for 300mm × 89mm × 89mm.
Said method prepares the compact rock core fixed as 300mm × 89mm × 89mm, and the volume of the rock core is larger and has
Have the advantages that stagnant pore is little, and optimize tight sand only to test by coring in laboratory experiment, and the blank without artificial core,
Help is provided for the exploitation of unconventionaloil pool field.
Claims (6)
1. a kind of tight sandy gravel displacement of reservoir oil rock core preparation method, it is characterised in that the method is comprised the following steps：
(1) dispensing:The quartz sand of certain particle diameter, clay mineral and cement powders are mixed in proportion, is stirred, obtained
To quartz sand mixture；
(2) assembly jig：Mould is mainly made up of base plate, side plate, briquetting, and wherein base plate, side plate, briquetting are steel plate, inwall
Surface roughness Ra≤0.025 μm, square rock core mould size：Length × width × height=305mm × 92mm × 92mm；
(3) mould moistening：Before to mould back-up sand, the lower surface that will be contacted to sand body with fine fountain head sprays into purpose stratum
Water 3mg, and uniform fold；
(4) even sand：The quartz sand mixture for weighing 1/N mould volumes loads in the mould after moistening, with striking off instrument in mould
Inside move back and forth in the horizontal direction, until quartz sand mixture surfacing, finally pushed down quartz sand mixture with briquetting；
(5) it is compacted：The mould for having loaded is placed on predetermined four-column hydraulic press, the precompressed under the conditions of pressing pressure 80MPa
After 5min, press voltage stabilizing release after 80MPa, voltage stabilizing 15min is controlled again；
(6) repeat step (3)～(5) to fill up to mould, wherein when per a many repeat step (5), step (5)
Pressure increases 10MPa；
(7) molding：Rock core mould with briquetting is integrally put in calorstat, is toasted under alternating temperature, timing condition, baking temperature
Degree and 100 DEG C of time, 240min → 130 DEG C, 30min → 210 DEG C, 10min → natural cooling；
(8) demoulding：Rock core mould after molding is placed on four-column hydraulic press fixed position, compacting briquetting makes rock core from mould
Abjection obtains rock core.
2. a kind of tight sandy gravel displacement of reservoir oil rock core preparation method according to claim 1, it is characterised in that the step
(1) cementing agent in is mainly made up of the component of following mass percent：Firming agent 9～20%, levelling agent 1～5%, barium sulfate
The mass percent of 0.5～1%, balance of epoxy resin and polyester, its epoxy resin and polyester is 1:1.
3. a kind of tight sandy gravel displacement of reservoir oil rock core preparation method according to claim 1 and 2, it is characterised in that described
The particle size content corresponding relation of cementing agent is consistent with the particle size content of quartz sand in step (1).
4. a kind of tight sandy gravel displacement of reservoir oil rock core preparation method according to claim 3, it is characterised in that the step
(2) base plate and side plate middle pad in mould adds high temperature resistance thin film.
5. a kind of tight sandy gravel displacement of reservoir oil rock core preparation method according to claim 1,2,4, it is characterised in that described
Quartz sand mixture to load and release the bridging plug of quartz sand mixture with even sand device after mould in step (4), makes quartz sand mixture
Closely point contact is formed each other.
6. a kind of tight sandy gravel displacement of reservoir oil rock core preparation method according to claim 5, it is characterised in that the step
(5) simultaneously the ultrasound of 90HZ～150HZ can be discharged to the mould equipped with quartz sand during compacting quartz sand mixture in
Ripple.
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Cited By (10)
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| CN108412469A (en) * | 2018-02-14 | 2018-08-17 | 中国石油大学(北京) | A kind of fill out sand tube and preparation method thereof and Reservoir Seepage analogy method |
| CN108717005A (en) * | 2018-07-27 | 2018-10-30 | 中国石油大学(华东) | A kind of preparation method of artificial viscous crude sandstone |
| CN108871907A (en) * | 2018-08-31 | 2018-11-23 | 中国石油天然气股份有限公司 | Hydraulic sand shaking device, hydraulic sand shaking system applied to sand filling model and hydraulic sand shaking method |
| CN108918214A (en) * | 2018-05-17 | 2018-11-30 | 中国石油天然气股份有限公司 | Conglomerate sample preparation method for core analysis and conglomerate sample for core analysis |
| CN109060484A (en) * | 2018-10-08 | 2018-12-21 | 中国海洋石油集团有限公司 | A kind of large scale rock core and preparation method thereof for permeability saturation curve measurement |
| CN110208059A (en) * | 2019-06-12 | 2019-09-06 | 西南石油大学 | A kind of physical model and preparation method thereof for simulating fluvial facies deposit |
| CN110208058A (en) * | 2019-06-12 | 2019-09-06 | 西南石油大学 | A kind of preparation method for simulating fluvial facies deposit oil reservoir artificial core |
| CN111781051A (en) * | 2020-07-09 | 2020-10-16 | 中国石油大学(北京) | Artificial conglomerate core based on lithology and permeability control and preparation method and application thereof |
| CN113532990A (en) * | 2021-07-15 | 2021-10-22 | 西南石油大学 | Preparation method of compact sandstone reservoir oil displacement core with argillaceous interlayer |
| CN114428000A (en) * | 2020-10-13 | 2022-05-03 | 中国石油化工股份有限公司 | Natural gas hydrate ore body artificial rock sample material, natural gas hydrate ore body artificial rock sample and preparation method |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108412469A (en) * | 2018-02-14 | 2018-08-17 | 中国石油大学(北京) | A kind of fill out sand tube and preparation method thereof and Reservoir Seepage analogy method |
| CN108918214A (en) * | 2018-05-17 | 2018-11-30 | 中国石油天然气股份有限公司 | Conglomerate sample preparation method for core analysis and conglomerate sample for core analysis |
| CN108918214B (en) * | 2018-05-17 | 2020-12-01 | 中国石油天然气股份有限公司 | Conglomerate sample preparation method for core analysis and conglomerate sample for core analysis |
| CN108717005A (en) * | 2018-07-27 | 2018-10-30 | 中国石油大学(华东) | A kind of preparation method of artificial viscous crude sandstone |
| CN108871907B (en) * | 2018-08-31 | 2020-10-09 | 中国石油天然气股份有限公司 | Hydraulic sand shaking device, hydraulic sand shaking system applied to sand filling model and hydraulic sand shaking method |
| CN108871907A (en) * | 2018-08-31 | 2018-11-23 | 中国石油天然气股份有限公司 | Hydraulic sand shaking device, hydraulic sand shaking system applied to sand filling model and hydraulic sand shaking method |
| CN109060484A (en) * | 2018-10-08 | 2018-12-21 | 中国海洋石油集团有限公司 | A kind of large scale rock core and preparation method thereof for permeability saturation curve measurement |
| CN109060484B (en) * | 2018-10-08 | 2021-06-15 | 中国海洋石油集团有限公司 | Large-size rock core for relative permeability curve determination and preparation method thereof |
| US20200300054A1 (en) * | 2019-06-12 | 2020-09-24 | Southwest Petroleum University | Method for preparing artificial core to simulate fluvial sedimentary reservoir |
| CN110208058A (en) * | 2019-06-12 | 2019-09-06 | 西南石油大学 | A kind of preparation method for simulating fluvial facies deposit oil reservoir artificial core |
| CN110208059A (en) * | 2019-06-12 | 2019-09-06 | 西南石油大学 | A kind of physical model and preparation method thereof for simulating fluvial facies deposit |
| CN111781051A (en) * | 2020-07-09 | 2020-10-16 | 中国石油大学(北京) | Artificial conglomerate core based on lithology and permeability control and preparation method and application thereof |
| CN111781051B (en) * | 2020-07-09 | 2021-06-25 | 中国石油大学(北京) | Artificial conglomerate core based on lithology and permeability control and preparation method and application thereof |
| CN114428000A (en) * | 2020-10-13 | 2022-05-03 | 中国石油化工股份有限公司 | Natural gas hydrate ore body artificial rock sample material, natural gas hydrate ore body artificial rock sample and preparation method |
| CN113532990A (en) * | 2021-07-15 | 2021-10-22 | 西南石油大学 | Preparation method of compact sandstone reservoir oil displacement core with argillaceous interlayer |
| CN113532990B (en) * | 2021-07-15 | 2023-11-14 | 西南石油大学 | Preparation method of compact sandstone oil displacement core with argillaceous interlayer |
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