CN109443886A - A kind of simulation core production method for determining pore throat and particle surface properties - Google Patents
A kind of simulation core production method for determining pore throat and particle surface properties Download PDFInfo
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- CN109443886A CN109443886A CN201910034384.1A CN201910034384A CN109443886A CN 109443886 A CN109443886 A CN 109443886A CN 201910034384 A CN201910034384 A CN 201910034384A CN 109443886 A CN109443886 A CN 109443886A
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- particle surface
- production method
- surface properties
- simulation core
- pore throat
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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
- G01N1/286—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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- 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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Abstract
The present invention relates to a kind of simulation core production methods for determining pore throat and particle surface properties, the production method chooses the glass marble of certain radius and is packed into compaction die, it recycles prepared clayish solution to rock core displacement, it is heated at high temperature after the completion of displacement, finally obtains simulation core finished product.The present invention determines the simulation core production method of pore throat and particle surface properties, is fitted into mold and is compacted using the tempered glass ball material of high temperature resistance and high strength.Radius by adjusting glass marble changes pore throat, the clayish solution pre-configured to glass simulation rock core displacement, it realizes the different property of particle surface, and then can carry out probing into different fluid when to rock displacement, rock particles surface nature is to Flooding Efficiency affecting laws.And the production method of entire simulation core is simple, raw material economics is easy to get, and in turn avoids the problem of natural core obtains difficult, common artificial core particle surface properties uncertainty, can not probe into single influence factor.
Description
Technical field
The present invention relates to a kind of simulation core production methods for determining pore throat and particle surface properties, belong to simulation core preparation
Technical field.
Background technique
Either explore, develop in petroleum industry, a series of reservoir treating such as reservoir reconstruction during, rock is not
Response pattern under the conditions of same-action is most important, is stranded when carrying out rock property test in the lab since natural core obtains
It is difficult and expensive, and apparent otherness can be shown due to drilling through rock core position difference in natural core, these
The influence of factor limits the research of laboratory rock response pattern.
For probing into research of the rock particles surface nature to Flooding Efficiency, seldom a part uses natural core, mainly
It uses using quartz sand or river sand as framework material, is prepared using epoxy resin or composite phosphate etc. as cementing agent
Artificial core, but this artificial core is more to the influence factor of physical properties of rock, there is partial size, the type of load bearing solids, cementing
Type, the content of agent, time, temperature of compacting etc., too many factor just determine the complexity of rock core, erratic behavior.For visiting
Studying carefully rock particles surface nature influences the experiment of Flooding Efficiency, and either natural core or common artificial core all can not
Unitary variant is controlled, influence of the different fluid to rock can not be necessarily probed into, petrophysical property can not be described to flowing in rock
The dynamic response of body.
Therefore, it needs to design a kind of simulation core production method, produces and meet laboratory and probe into different fluid to rock
When stone displacement, simulation core needed for experiment of the rock particles surface nature to Flooding Efficiency affecting laws.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of simulation core production side for determining pore throat and particle surface properties
Method realizes the scheduled porosity of simulation core and particle surface properties, utilizes party's legal system using glass marble simulation core particle
Make obtained simulation core surface nature to stablize, single factors can be probed into the affecting laws of Flooding Efficiency.
Technical scheme is as follows:
A kind of simulation core production method for determining pore throat and particle surface properties, comprising the following steps:
(1) glass marble that radius is 0.5mm-1.5mm is chosen, it is spare；
(2) glass marble is packed into mold and is compacted, obtain glass marble simulation core；
(3) montmorillonite, kaolin, chlorite are uniformly mixed to form mixture A, wherein montmorillonite, kaolin, green
The mass ratio of mudstone is (0.1-1): (0.1-2): (0.1-3)；
(4) water stirring is added into mixture A, is configured to clayish solution B, the content of solute is 3%- in clayish solution B
20%；
(5) glass marble simulation core made from step (2) is put into core holding unit, is driven with clayish solution B
For attachment；
(6) after the completion of displacement attachment, glass marble simulation core is taken out from core holding unit, is heated, most
Simulation core finished product is obtained eventually.
Preferably, in step (1), the glass marble that material is tempered glass, compression strength 6MPa are chosen.
Preferably, in step (1), selected glass marble highest bearing temperature is 180 DEG C.
Preferably, in step (2), the mold be cylinder, material is tempered glass, be highly 65mm, internal diameter 25mm,
Outer diameter is 28mm, compression strength 6MPa.
Preferably, it in step (2), is compacted using four-column hydraulic press, pressurization range is 0-30MPa, the pressure of compacting
For 1-3MPa, the persistent pressure time is 1-10min.
Preferably, in step (3), the particle mesh number of montmorillonite is 500-1200 mesh, and kaolinic particle mesh number is 500-
1200 mesh, the particle mesh number of chlorite are 500-1200 mesh.
Preferably, in step (3), montmorillonite, kaolin, chlorite are stirred the time and are at least 3min.
Preferably, in step (4), water used is deionized water.
Preferably, in step (5), core holding unit can provide confining pressure and displacement effect, confining pressure 0.2-0.5MPa, displacement
Pressure is 0.1-0.3MPa.
Preferably, in step (5), the time of displacement attachment is 5-20min.
Preferably, it in step (6), is heated using dryer, heating temperature range is at 0-500 DEG C.
Preferably, it in step (6), is heated using the method for fractional steps, 80 DEG C first heating 1h, then 120 DEG C of heating 2h.
The beneficial effects of the present invention are:
The present invention determines the simulation core production method of pore throat and particle surface properties, realizes and utilizes high temperature resistance and high strength
Tempered glass ball material, is fitted into mold and is compacted.Radius by adjusting glass marble changes pore throat, simulates rock core displacement to glass
Pre-configured clayish solution realizes the different property of particle surface, and then can probe into different fluid to rock
When displacement, rock particles surface nature is to Flooding Efficiency affecting laws.And the production method of entire simulation core is simple, raw material
It is economical and easily available, it in turn avoids natural core and obtains difficulty, common artificial core particle surface properties are uncertain, can not probe into list
The problem of one influence factor.
Detailed description of the invention
Fig. 1 is the flow chart of simulation core production method of the present invention；
Fig. 2 is simulation core structural schematic diagram obtained；
Specific embodiment
The present invention will be further described by way of example and in conjunction with the accompanying drawings, but not limited to this.
Embodiment 1:
As shown in Figure 1, the present embodiment provides a kind of simulation core production methods for determining pore throat and particle surface properties, specifically
Operating process is as follows:
(1) choose radius be 0.5mm, the glass marble that material is tempered glass, and compression strength be 6MPa, highest bear temperature
Degree is 180 DEG C, spare；
(2) glass marble is packed into cylinder mould, and is compacted using four-column hydraulic press, obtain glass marble simulation rock
The heart；
(3) montmorillonite, kaolin, chlorite are uniformly mixed in a reservoir to form mixture A, wherein montmorillonite,
Kaolin, chlorite mass ratio be 1:1:1, be stirred the time be 3min；
(4) deionized water stirring is added into mixture A, is configured to clayish solution B, the content of solute in clayish solution B
It is 10%；
(5) glass marble simulation core made from step (2) is put into core holding unit, is driven with clayish solution B
For attachment, confining pressure is set as 0.3MPa, displacement pressure 0.1MPa.The time of displacement attachment is 10min；
(6) glass marble simulation core is taken out from core holding unit, is heated using dryer, heating temperature range
At 0-500 DEG C, 80 DEG C first heating 1h, then 120 DEG C of heating 2h, finally obtain simulation core finished product, as shown in Figure 2.?
To simulation core finished product in, glass marble be used for simulation core particle, clayish solution B, which is attached on glass marble, forms single object
Matter, it is subsequent to can be used for displacement test law study.
The wherein cylinder mould that step (2) uses, material is tempered glass, is highly 65mm, internal diameter 25mm, outer diameter are
28mm, compression strength 6MPa.The pressurization range of four-column hydraulic press is 0-30MPa, and the pressure of compacting is 1MPa, when persistent pressure
Between be 5min.
The particle mesh number of montmorillonite is 1000 mesh in step (3), and kaolinic particle mesh number is 1000 mesh, of chlorite
Grain mesh number is 1000 mesh.
Core holding unit is standard displacement test clamper in step (5), such as a kind of Chinese patent application " more rulers of pressure-sensitive
Spend horizontal joint comprehensive regulation imitative experimental appliance and method " (application number 201811085718X) middle core holding unit knot provided
Structure, it is possible to provide confining pressure and displacement effect.
The present embodiment technical solution changes pore throat using the different glass radiuses of a ball, and utilizes prepared clayish solution
B carries out displacement to glass marble rock core to obtain different particle surface properties, finally obtains simulation core finished product.It is subsequent can be right
The simulation core probe into different fluid when to rock displacement, and rock particles surface nature is to Flooding Efficiency affecting laws.
Utilize simulation core finished product made from the present embodiment, when carrying out the displacement test of different fluid, displacement result
It is shown in Table 1.
1 simulation core displacement test physical property contrast table of table
| Displacement fluid | Start liquid time/s out | Total time/s | Total amount of liquid/ml | Flow rate ml/s |
| Deionized water | 3.4 | 60 | 20 | 0.33 |
| 10%NaCl solution | 5.1 | 60 | 16 | 0.27 |
| 20%NaCl solution | 6.2 | 60 | 11 | 0.18 |
| 30%NaCl solution | 7 | 60 | 8 | 0.13 |
The present embodiment production rock core using glass marble diameter setting hole size, and can to particle surface into
Row adheres to one or more single clay materials, probes into rock porosity and a certain particle surface properties pair in laboratory experiment with this
The affecting laws of Flooding Efficiency, and entire simulation core obtains that manufacturing process is simple, safe and environment-friendly, and production raw material par is easy to get.
Embodiment 2:
A kind of simulation core production method for determining pore throat and particle surface properties, step is as described in Example 1, difference
Be: choose in step (1) radius be 1mm, the glass marble that material is tempered glass.
The pressure being compacted in step (2) is 1.5MPa, and the persistent pressure time is 5min.
Montmorillonite in step (3), kaolin, chlorite mass ratio be 1:2:1.Being stirred the time is 5min.
The content of solute is 15% in clayish solution B in step (4).
Confining pressure is set in step (5) as 0.5MPa, displacement pressure 0.2Mpa, and the time of displacement attachment is 5min.
Utilize simulation core finished product made from the present embodiment, when carrying out the displacement test of different fluid, displacement result
It is shown in Table 2.
2 simulation core displacement test physical property contrast table of table
Embodiment 3:
A kind of simulation core production method for determining pore throat and particle surface properties, step is as described in Example 1, difference
Be: choose in step (1) radius be 1.5mm, the glass marble that material is tempered glass.
The pressure being compacted in step (2) is 3MPa, and the persistent pressure time is 10min.
Montmorillonite in step (3), kaolin, chlorite mass ratio be 1:2:3.The particle mesh number of montmorillonite is 500 mesh,
Kaolinic particle mesh number is 500 mesh, and the particle mesh number of chlorite is 500 mesh.
The content of solute is 3% in clayish solution B in step (4).
Confining pressure is set as 0.5MPa, displacement pressure 0.3MPa in step (5).The time of displacement attachment is 20min.
Embodiment 4:
A kind of simulation core production method for determining pore throat and particle surface properties, step is as described in Example 1, difference
Be: the pressure being compacted in step (2) is 3MPa, and the persistent pressure time is 1min.
The particle mesh number of montmorillonite is 1200 mesh in step (3), and kaolinic particle mesh number is 1200 mesh, of chlorite
Grain mesh number is 1200 mesh.
The content of solute is 20% in clayish solution B in step (4).
Confining pressure is set as 0.2MPa, displacement pressure 0.3MPa in step (5).The time of displacement attachment is 20min.
Claims (10)
1. a kind of simulation core production method for determining pore throat and particle surface properties, which comprises the following steps:
(1) glass marble that radius is 0.5mm-1.5mm is chosen, it is spare；
(2) glass marble is packed into mold and is compacted, obtain glass marble simulation core；
(3) montmorillonite, kaolin, chlorite are uniformly mixed to form mixture A, wherein montmorillonite, kaolin, chlorite
Mass ratio be (0.1-1): (0.1-2): (0.1-3)；
(4) water stirring is added into mixture A, is configured to clayish solution B, the content of solute is 3%-20% in clayish solution B；
(5) glass marble simulation core made from step (2) is put into core holding unit, it is attached to carry out displacement with clayish solution B
?；
(6) after the completion of displacement attachment, glass marble simulation core is taken out from core holding unit, is heated, final
To simulation core finished product.
2. determining the simulation core production method of pore throat and particle surface properties as described in claim 1, which is characterized in that step
(1) in, the glass marble that material is tempered glass, compression strength 6MPa are chosen.
3. determining the simulation core production method of pore throat and particle surface properties as described in claim 1, which is characterized in that step
(1) in, selected glass marble highest bearing temperature is 180 DEG C.
4. determining the simulation core production method of pore throat and particle surface properties as described in claim 1, which is characterized in that step
(2) in, the mold is cylinder, and it is highly 65mm, internal diameter 25mm, outer diameter 28mm that material, which is tempered glass, compression strength
For 6MPa.
5. determining the simulation core production method of pore throat and particle surface properties as described in claim 1, which is characterized in that step
(2) it in, is compacted using four-column hydraulic press, pressurization range is 0-30MPa, and the pressure of compacting is 1-3MPa, when persistent pressure
Between be 1-10min.
6. determining the simulation core production method of pore throat and particle surface properties as described in claim 1, which is characterized in that step
(3) in, the particle mesh number of montmorillonite is 500-1200 mesh, and kaolinic particle mesh number is 500-1200 mesh, the particle of chlorite
Mesh number is 500-1200 mesh.
7. determining the simulation core production method of pore throat and particle surface properties as described in claim 1, which is characterized in that step
(3) in, montmorillonite, kaolin, chlorite are stirred the time and are at least 3min.
8. determining the simulation core production method of pore throat and particle surface properties as described in claim 1, which is characterized in that step
(4) in, water used is deionized water.
9. determining the simulation core production method of pore throat and particle surface properties as described in claim 1, which is characterized in that step
(5) in, core holding unit can provide confining pressure and displacement effect, confining pressure 0.2-0.5MPa, displacement pressure 0.1-0.3MPa drive
Time for attachment is 5-20min.
10. determining the simulation core production method of pore throat and particle surface properties as described in claim 1, which is characterized in that step
Suddenly it in (6), being heated using dryer, heating temperature range is heated at 0-500 DEG C using the method for fractional steps, and 80 DEG C first
1h is heated, then 120 DEG C of heating 2h.
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| CN201910034384.1A CN109443886B (en) | 2019-01-15 | 2019-01-15 | Method for manufacturing simulated rock core with fixed pore throat and particle surface property |
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| CN113702147A (en) * | 2020-05-20 | 2021-11-26 | 中国石油天然气股份有限公司 | Core manufacturing method |
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