CN105884255A - Method for controlling wettability of artificial conglomerate core - Google Patents
Method for controlling wettability of artificial conglomerate core Download PDFInfo
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- CN105884255A CN105884255A CN201610190951.9A CN201610190951A CN105884255A CN 105884255 A CN105884255 A CN 105884255A CN 201610190951 A CN201610190951 A CN 201610190951A CN 105884255 A CN105884255 A CN 105884255A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/14—Polyepoxides
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/10—Coating or impregnating
- C04B20/1051—Organo-metallic compounds; Organo-silicon compounds, e.g. bentone
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Abstract
The invention relates to a method for controlling wettability of an artificial conglomerate core. The method includes a water wet control method and an oil wet control method. In the water wet control process, a water-soluble nonionic surfactant OP-10 is added into a curing agent, the addition amount is controlled so that wettability of the artificial conglomerate core can be converted into hydrophily from neutral partial lipophilicity, and the wettability of the artificial conglomerate core is controlled. In the oil wet control process, quartz sand at different grades is mixed and treated with silicone oil, and the manufactured artificial conglomerate core has weak lipophilicity through a series of operation such as stirring, volatilizing and drying. The method for controlling the wettability of the artificial conglomerate core is easy to operate, low in cost, high in efficiency, stability and adsorbability and high in wettability control accuracy, the manufactured artificial conglomerate core approximates a natural rock core and is suitable for indoor flooding oil physical simulation experiments in the petroleum industry, and simulation results are more real and reliable and meet practical situations better.
Description
Technical field
The invention belongs to petroleum exploration and development technical field, be specifically related to a kind of artificial sand rock core
The control method of wetability.
Background technology
The experimental model that indoor physical simulation uses is mainly core model.Owing to natural coring is deposited
Complicated in flow process, difficulty big, high in cost of production problem, so the most generally selecting artificial cores generation
Laboratory physical simulation experiment is carried out for natural core.Complexity based on the natural core origin cause of formation,
During making artificial core, it is impossible to simulate natural core complicated become thus reach to connect with natural core
Near anisotropism, the in addition pore throat character of conventional artificial's core, surface nature and wetting property
Single, it is impossible to well close to natural core, therefore artificial cores can not replace accurately and effectively
Natural core carries out indoor physical simulation research.
Application publication number is that the patent of invention of CN1664547A discloses a kind of quartz sand epoxy
Plastic bonding core and preparation method thereof, this core is made up of cement and quartz sand, wherein glue
Knot thing is made up of epoxy resin and three kinds of additives, and epoxy resin and additive formula be: epoxy
Resin 0.5-1.5 part, dibutyl phthalate 0.1-0.5 part, ethylenediamine 0.01-0.1 part and
Acetone 0.1-1 part.Application publication number is that the patent of invention of CN103880384A discloses one
Artificial sand rock core and preparation method thereof, the percentage by weight of each component in this artificial sand rock core
For: clay 2-20%, cement 5-25%, feldspar 0-10%.These two patents are each provided with
A kind of sandstone core containing quartz sand and preparation method thereof, and from pore throat character, distribution and core
It is poor that surface nature aspect solves the artificial cores of prior art similitude compared with natural core
Problem, but do not solve about artificial cores wetability be difficult to control problem.
During actual development at the scene, chemical assistant has weight for improving oil recovery factor
Acting on, the wetability at different development phase rocks also can produce change.How by artificial
Core, from the condition of the angle approximate simulation reservoir rocks of wetability, is by every contrast experiment
Key link, especially petroleum industry use indoor physical simulation technical research mechanism of oil displacement weight
Want premise, however the most few to the research of artificial sand rock core wetability control method,
And there are some insoluble problems.For control wet for water, in the mistake of configuration wetting agent
In journey, Monophase microemulsion needs to pre-process with surfactant, crosslinking agent etc., operates and joins
Put complex process, microemulsion at high temperature extremely unstable, easily degrade；For oily wet control
For, wetting agent polymethyl methacrylate, polystyrene and polyethylene are controlling microscopic glass
Model aspect advantage highlights, and has the ability of good control angle of wetting, but artificial in control
The wetability aspect of sandstone core is the most unsatisfactory, and one is that quartz sand particle produces suction to wetting agent
Attached, reduce wetting agent effect, two is during making artificial sandstone core, quartz sand particle
And cementing agent needs at high temperature to process and suppress, but these three wetting agent is at high temperature stable
Property extreme difference.Therefore, it is badly in need of developing the control method of a kind of artificial sand rock core wetability, it is considered to
The factors such as the absorption of stability, sand body and wetability control accuracy, preferably solve the problems referred to above.
Summary of the invention
For solving problems of the prior art, the present invention provides a kind of artificial sand rock core profit
Moist control method, including the wet control method of water and the wet control method of oil, its object is to:
By selecting suitable wetting agent, and consider stability, sand during wetting control
The factors such as body absorption and wetability control accuracy, to realize the accurate of artificial sand rock core wetability
Control, reduce the difference with natural core.
The present invention provides the control method of a kind of artificial sand rock core wetability, according to sequencing
Comprise the following steps:
Step one: use vibrating sieving machine sieve to take the quartz sand of different-grain diameter, and mix by a certain percentage；
Step 2: curing agent is put in insulating box and heat；
Step 3: wetting agent is added in the curing agent after heating, and stirring makes it fully dissolve, then
Material after dissolving adds in acetone, obtains the mixture containing wetting agent；
Step 4: the mixture containing wetting agent is added in quartz sand, adds epoxy resin and increasing
Tough dose, and stir, sieve, obtain the quartz sand with wetability；
Step 5: the quartz sand with wetability is loaded in core mould, is pressed into by hydraulic press
Artificial sand rock core, then artificial sand rock core is put into oven for curing, and naturally cool to room
Temperature, obtains the artificial sand rock core with wetability.
In addition to the surface nature of quartz sand, the surface nature of cement is equally to artificial sand rock core
Wetability play an important role.During the wet control of water of the present invention, quartz sand need not
Pretreatment, adds a certain amount of wetting agent to significantly change made artificial sand in curing agent
The wetability of rock core.By lot of experiments, finally determine a kind of water-soluble nonionic
Type Surfactant OP-10 is as wetting agent, and controls its addition so that made people
Make the wetability of sandstone core by the inclined lipophile of neutrality to hydrophilic conversion, thus reach to control people
Make the purpose of sandstone core wetability.
In step 3, wetting agent, curing agent, acetone order of addition the most crucial, first will wetting
Agent adds in curing agent, then is added in acetone by the mixture of the two.Owing to curing agent rises cementing
Effect, be added in quartz sand, first can at the Surface coating one layer of quartz sand particle,
So first wetting agent being added in curing agent, such curing agent plays again the effect of solvent, will profit
Humectant is dissolved in wherein.Mixture after wetting agent dissolves with curing agent adds in quartz sand
Time, curing agent is first at the Surface coating one layer of quartz sand particle, and meanwhile wetting agent also exists
The Surface coating of quartz sand particle one layer, curing agent helps wetting agent to be attached to quartz sand particle
On surface.
In step 5, after quartz sand mixture is loaded core mould, with stragith edge by quartz sand
It is uniformly distributed, then the mould filling quartz sand is placed under hydraulic press, slowly boosts to
14-83 atmospheric pressure, voltage stabilizing 15min, pressure release；The core suppressed is placed in baking oven,
Isothermal curing 6-8h under the conditions of 85 DEG C, closes baking oven power supply, naturally cools to room temperature；Make
Difform core is made with coring bit and cutting machine.
Preferably, in step one, the particle diameter of quartz sand be 40-60 mesh, 60-100 mesh and
100-200 mesh, corresponding mixed proportion is 1:1:0.5-1.Sand is sieved, on the one hand by vibrating sieving machine
The film iron of quartz sand surface, bonding can be removed by the mill stripping power between mechanical force and sand grains
Thing and mud impure mineral etc., grind into the mineral aggregate of monomer, on the other hand further
The quartz sand particle that particle diameter is bigger can be filtered out, and reach to purify further through classification process
The effect of quartz sand.
In any of the above-described scheme preferably, in step 2, the heating-up temperature of curing agent is
100-110 DEG C, the heat time be 2-3h.
In any of the above-described scheme preferably, described curing agent, epoxy resin and toughener structure
Become cement.
In any of the above-described scheme preferably, described curing agent, epoxy resin and toughener divide
Not Wei described cement gross weight 7%, 63% and 20%.
In any of the above-described scheme preferably, described curing agent is ethylenediamine, described toughener
For dibutyl phthalate.
In any of the above-described scheme preferably, described wetting agent is quartz sand gross weight after mixing
0.3-1.0%.
In any of the above-described scheme preferably, described wetting agent is water-soluble nonionic surface
Activating agent OP-10.The Chinese of nonionic surface active agent OP-10 is alkyl phenol polyoxy
Vinethene, white and milky pastel, viscosity when 100 DEG C is 41 ± 10mPa s, flash-point
More than 250 DEG C, HLB value scope is 13-14.5, in wider pH range and temperature range
The most stable, acid and alkali-resistance, and resistance to hard water is strong, can be with anions and canons surfactant
Compatibility, is nonionic surfactant of good performance.Non-polar group due to OP-10
The longest, so hydrophobic ability is strong, and hydrophilic radical is clipped in hydrocarbon chain, the hydrophilic ability of ether
Weak, institute is so that OP-10 has extraordinary water solubility.
The present invention also provides for the control method of a kind of artificial sand rock core wetability, according to the most suitable
Sequence comprises the following steps:
Step one: use vibrating sieving machine sieve to take the quartz sand of different-grain diameter, and mix by a certain percentage,
After weighing mixing again, 1/3rd of quartz sand gross weight carry out subsequent operation, remaining three/
Two is standby；
Step 2: silicone oil is diluted, then the silicone oil after dilution is added the quartz of weigh 1/3rd
Sand stirs, volatilizees under room temperature；
Step 3: the quartz sand after volatilization is put in electric drying oven with forced convection and heats, constant temperature drying,
Obtain the quartz sand with wetability；
Step 4: the quartz sand with wetability is added in the quartz sand of standby 2/3rds and stir
Uniformly, add curing agent, epoxy resin, toughener and acetone, and stir, sieve,
To mixture；
Step 5: fill this blend in core mould, be pressed into artificial sand rock core by hydraulic press,
Again artificial sand rock core is put into oven for curing, and naturally cool to room temperature, obtain that there is profit
Moist artificial sand rock core.
After different grades of quartz sand is mixed in proportion, process through silicone oil, then through stirring,
Made artificial sand rock core is made to present slightly oil-wet after the sequence of operations such as volatilization, drying.
In step 5, after quartz sand mixture is loaded core mould, with stragith edge by quartz sand
It is uniformly distributed, then the mould filling quartz sand is placed under hydraulic press, slowly boosts to
14-83 atmospheric pressure, voltage stabilizing 15min, pressure release；The core suppressed is placed in baking oven,
Isothermal curing 6-8h under the conditions of 85 DEG C, closes baking oven power supply, naturally cools to room temperature；Make
Difform core is made with coring bit and cutting machine.
Preferably, in step one, the particle diameter of quartz sand be 40-60 mesh, 60-100 mesh and
100-200 mesh, corresponding mixed proportion is 1:1:0.5-1.Sand is sieved, on the one hand by vibrating sieving machine
The film iron of quartz sand surface, bonding can be removed by the mill stripping power between mechanical force and sand grains
Thing and mud impure mineral etc., grind into the mineral aggregate of monomer, on the other hand further
The quartz sand particle that particle diameter is bigger can be filtered out, and reach to purify further through classification process
The effect of quartz sand.
In any of the above-described scheme preferably, in step 2, the weight of silicone oil is stone after mixing
The 1% of sand gross weight 1/3rd.
In any of the above-described scheme preferably, dilute silicone oil with petroleum ether, the weight of petroleum ether
For silicone oil weight 20 times.Petroleum ether is prone to volatilization, and dissolubility is good, makees solvent with petroleum ether,
It is fast that silicone oil dissolves, and dissolves full and uniform.
In any of the above-described scheme preferably, in step 2, the volatilization time is at least 20h.
In the wet control method of oil of the present invention, silicone oil is soaked in petroleum ether so that it is fully dissolve,
Adding in quartz sand, now silicone oil and quartz sand are all dissolved in petroleum ether, and silicone oil is coated on
On quartz sand particle, petroleum ether need to vapor away completely so that adheres between silicone oil and quartz sand
More fully closely, wetting effect is more notable.
In any of the above-described scheme preferably, in step 3, the heating temperature of quartz sand after volatilization
Degree is 180-190 DEG C, the heat time is 8-10h.The present invention, should through experimental results demonstrate
Heating-up temperature and heat time are the optimal stoving process of quartz sand, quartz sand this high temperature of process,
After environment is dried for a long time, can be formed highly stable when later stage core wetability processes
Silicon oil membrane, and then make the wetability of artificial cores be well controlled.If heating-up temperature is too high
Or too low, the heat time is long or too short, then the silicon oil membrane formed is the most unstable, and is weak to
High temperature, wetability hardly results in control.
In any of the above-described scheme preferably, described curing agent, epoxy resin and toughener structure
Become cement.
In any of the above-described scheme preferably, described curing agent, epoxy resin and toughener divide
Not Wei described cement gross weight 7%, 63% and 20%.
In any of the above-described scheme preferably, described curing agent is ethylenediamine, described toughener
For dibutyl phthalate.
The control method of the artificial sand rock core wetability of the present invention, simple to operate, low cost,
Efficiency is high, good stability, excellent adsorption, and wetting control accuracy is high, made artificial sand rock
Core is close to natural core, it is adaptable to petroleum industry indoor drive physical analogue is tested, simulation
Result is more true and reliable, more tallies with the actual situation.
Detailed description of the invention
In order to be further understood that the summary of the invention of the present invention, detailed below in conjunction with specific embodiment
Carefully illustrate the present invention.
Embodiment one:
According to the embodiment of control method of the artificial sand rock core wetability of the present invention, according to
Sequencing comprises the following steps:
Step one: use vibrating sieving machine sieve to take the quartz sand of different-grain diameter, and mix by a certain percentage；
Step 2: curing agent is put in insulating box and heat；
Step 3: wetting agent is added in the curing agent after heating, and stirring makes it fully dissolve, then
Material after dissolving adds in acetone, obtains the mixture containing wetting agent；
Step 4: the mixture containing wetting agent is added in quartz sand, adds epoxy resin and increasing
Tough dose, and stir, sieve, obtain the quartz sand with wetability；
Step 5: the quartz sand with wetability is loaded in core mould, is pressed into by hydraulic press
Artificial sand rock core, then artificial sand rock core is put into oven for curing, and naturally cool to room
Temperature, obtains the artificial sand rock core with wetability.
During the wet control of water of the present embodiment, quartz sand need not pretreatment, at curing agent
A certain amount of wetting agent of middle interpolation is to significantly change the wetability of made artificial sand rock core.
The present embodiment select a kind of water-soluble nonionic Surfactant OP-10 as wetting agent, and
Control its addition so that the wetability of made artificial sand rock core is by the inclined lipophile of neutrality
To hydrophilic conversion, thus reach to control the purpose of artificial sand rock core wetability.
In step one, the particle diameter of quartz sand is 40 mesh, 60 mesh and 100 mesh, mixes accordingly
Ratio is 1:1:0.5.Sand is sieved by vibrating sieving machine, on the one hand can be by between mechanical force and sand grains
Mill stripping power remove the film iron of quartz sand surface, adhesive and mud impure mineral etc., enter one
Step grinds into the mineral aggregate of monomer, on the other hand can filter out the quartz that particle diameter is bigger
Sand particle, and the effect reaching further purifying quartz sand is processed through classification.
In step 2, the heating-up temperature of curing agent is 100 DEG C, the heat time is 3h.
In step 3, wetting agent, curing agent, acetone order of addition the most crucial, first will wetting
Agent adds in curing agent, then is added in acetone by the mixture of the two.Owing to curing agent rises cementing
Effect, be added in quartz sand, first can at the Surface coating one layer of quartz sand particle,
So first wetting agent being added in curing agent, such curing agent plays again the effect of solvent, will profit
Humectant is dissolved in wherein.Mixture after wetting agent dissolves with curing agent adds in quartz sand
Time, curing agent is first at the Surface coating one layer of quartz sand particle, and meanwhile wetting agent also exists
The Surface coating of quartz sand particle one layer, curing agent helps wetting agent to be attached to quartz sand particle
On surface.
In step 5, after quartz sand mixture is loaded core mould, with stragith edge by quartz sand
It is uniformly distributed, then the mould filling quartz sand is placed under hydraulic press, slowly boosts to
14-83 atmospheric pressure, voltage stabilizing 15min, pressure release；The core suppressed is placed in baking oven,
Isothermal curing 6-8h under the conditions of 85 DEG C, closes baking oven power supply, naturally cools to room temperature；Make
Difform core is made with coring bit and cutting machine.
Described curing agent, epoxy resin and toughener constitute cement.Described curing agent, epoxy
Resin and toughener are respectively 7%, 63% and the 20% of described cement gross weight.Described solid
Agent is ethylenediamine, and described toughener is dibutyl phthalate.
Described wetting agent is water-soluble nonionic Surfactant OP-10, and its addition is mixed
After conjunction the 0.3% of quartz sand gross weight.The Chinese of nonionic surface active agent OP-10
For APES, white and milky pastel, viscosity when 100 DEG C is
41 ± 10mPa s, flash-point is more than 250 DEG C, and HLB value scope is 13-14.5, at wider PH
In value scope and temperature range the most stable, acid and alkali-resistance, and resistance to hard water is strong, can with cloudy,
Cationic surfactant compatibility, is nonionic surfactant of good performance.Due to OP
The non-polar group of-10 is the longest, so hydrophobic ability is strong, and hydrophilic radical is clipped in hydrocarbon chain,
The hydrophilic ability of ether is weak, and institute is so that OP-10 has extraordinary water solubility.OP-10 buys
In Beijing Chemical Plant.
The control method of the artificial sand rock core wetability of the present embodiment, simple to operate, low cost,
Efficiency is high, good stability, excellent adsorption, and wetting control accuracy is high, the artificial sand rock rock of making
Core is close to natural core.
Embodiment two:
According to another embodiment of control method of the artificial sand rock core wetability of the present invention, its
Processing step, principle are all identical with embodiment one with beneficial effect etc., except for the difference that: quartz sand
Particle diameter be 50 mesh, 80 mesh and 150 mesh, corresponding mixed proportion is 1:1:0.8；Curing agent
Heating-up temperature be 105 DEG C, the heat time be 2.5h；Water-soluble nonionic surfactant
The addition of OP-10 be mixing after quartz sand gross weight 1.0%.
Embodiment three:
According to another embodiment of control method of the artificial sand rock core wetability of the present invention, its
Processing step, principle are all identical with embodiment one with beneficial effect etc., except for the difference that: quartz sand
Particle diameter be 60 mesh, 100 mesh and 200 mesh, corresponding mixed proportion is 1:1:1；Curing agent
Heating-up temperature be 110 DEG C, the heat time be 2h；Water-soluble nonionic surfactant
The addition of OP-10 be mixing after quartz sand gross weight 0.5%.
Embodiment four:
According to another embodiment of control method of the artificial sand rock core wetability of the present invention, its
Processing step, principle are all identical with embodiment one with beneficial effect etc., except for the difference that: quartz sand
Particle diameter be 40 mesh, 80 mesh and 150 mesh, corresponding mixed proportion is 1:1:0.6；Curing agent
Heating-up temperature be 110 DEG C, the heat time be 3h；Water-soluble nonionic surfactant
The addition of OP-10 be mixing after quartz sand gross weight 0.7%.
Embodiment five:
According to another embodiment of control method of the artificial sand rock core wetability of the present invention, press
Comprise the following steps according to sequencing:
Step one: use vibrating sieving machine sieve to take the quartz sand of different-grain diameter, and mix by a certain percentage,
After weighing mixing again, 1/3rd of quartz sand gross weight carry out subsequent operation, remaining three/
Two is standby；
Step 2: silicone oil is diluted, then the silicone oil after dilution is added the quartz of weigh 1/3rd
Sand stirs, volatilizees under room temperature；
Step 3: the quartz sand after volatilization is put in electric drying oven with forced convection and heats, constant temperature drying,
Obtain the quartz sand with wetability；
Step 4: the quartz sand with wetability is added in the quartz sand of standby 2/3rds and stir
Uniformly, add curing agent, epoxy resin, toughener and acetone, and stir, sieve,
To mixture；
Step 5: fill this blend in core mould, be pressed into artificial sand rock core by hydraulic press,
Again artificial sand rock core is put into oven for curing, and naturally cool to room temperature, obtain that there is profit
Moist artificial sand rock core.
After different grades of quartz sand is mixed in proportion, process through silicone oil, then through stirring,
Made artificial sand rock core is made to present slightly oil-wet after the sequence of operations such as volatilization, drying.
Silicone oil is bought in Beijing Chemical Plant.
In step one, the particle diameter of quartz sand is 40 mesh, 60 mesh and 100 mesh, mixes accordingly
Ratio is 1:1:0.5.Sand is sieved by vibrating sieving machine, on the one hand can be by between mechanical force and sand grains
Mill stripping power remove the film iron of quartz sand surface, adhesive and mud impure mineral etc., enter one
Step grinds into the mineral aggregate of monomer, on the other hand can filter out the quartz that particle diameter is bigger
Sand particle, and the effect reaching further purifying quartz sand is processed through classification.
In step 2, the weight of silicone oil be mixing after quartz sand gross weight 1/3rd 1%；
Diluting silicone oil with petroleum ether, the weight of petroleum ether is 20 times of silicone oil weight；The volatilization time is extremely
It is 20h less.In the wet control method of oil of the present embodiment, silicone oil is soaked in petroleum ether, makes
It fully dissolves, and adds in quartz sand, and now silicone oil and quartz sand are all dissolved in petroleum ether,
Silicone oil is coated on quartz sand particle, and petroleum ether need to vapor away completely so that silicone oil and quartz sand
Between adhere to more fully closely, wetting effect is more notable.
In step 3, after volatilization the heating-up temperature of quartz sand be 180 DEG C, the heat time be 10h.
After quartz sand is dried under this temperature and time, can be formed when later stage core wetability processes
Highly stable silicon oil membrane, and then make the wetability of artificial cores be well controlled.
In step 5, after quartz sand mixture is loaded core mould, with stragith edge by quartz sand
It is uniformly distributed, then the mould filling quartz sand is placed under hydraulic press, slowly boosts to
14-83 atmospheric pressure, voltage stabilizing 15min, pressure release；The core suppressed is placed in baking oven,
Isothermal curing 6-8h under the conditions of 85 DEG C, closes baking oven power supply, naturally cools to room temperature；Make
Difform core is made with coring bit and cutting machine.
Described curing agent, epoxy resin and toughener constitute cement.Described curing agent, epoxy
Resin and toughener are respectively 7%, 63% and the 20% of described cement gross weight.Described solid
Agent is ethylenediamine, and described toughener is dibutyl phthalate.
The control method of the artificial sand rock core wetability of the present embodiment, simple to operate, low cost,
Efficiency is high, good stability, excellent adsorption, and wetting control accuracy is high, the artificial sand rock rock of making
Core is close to natural core.
Embodiment six:
According to another embodiment of control method of the artificial sand rock core wetability of the present invention, its
Processing step, principle are all identical with embodiment five with beneficial effect etc., except for the difference that: quartz sand
Particle diameter be 50 mesh, 80 mesh and 150 mesh, corresponding mixed proportion is 1:1:0.8；Petroleum ether
After volatilization the heating-up temperature of quartz sand be 185 DEG C, the heat time be 9h, quartz sand is in this temperature
After drying under the time, highly stable silicone oil can be formed when later stage core wetability processes
Film, and then make the wetability of artificial cores be well controlled.
Embodiment seven:
According to another embodiment of control method of the artificial sand rock core wetability of the present invention, its
Processing step, principle are all identical with embodiment five with beneficial effect etc., except for the difference that: quartz sand
Particle diameter be 60 mesh, 100 mesh and 200 mesh, corresponding mixed proportion is 1:1:1；Petroleum ether
After volatilization the heating-up temperature of quartz sand be 190 DEG C, the heat time be 8h, quartz sand is in this temperature
After drying under the time, highly stable silicone oil can be formed when later stage core wetability processes
Film, and then make the wetability of artificial cores be well controlled.
Amott method is utilized to measure the wetability of the artificial sand rock core that above-described embodiment makes,
Measurement result is as shown in table 1.Knowable to the data of table 1, use the technical side of above-described embodiment
Case can control the wetability of artificial sand rock core well.
The measurement result of table 1 artificial sand rock core wetability
| Artificial sand rock core | Wetting index | Wetability |
| Silicon oil sand (embodiment seven) | -0.23 | Slightly oil-wet |
| Silicon oil sand (embodiment six) | -0.23 | Slightly oil-wet |
| Silicon oil sand (embodiment five) | -0.23 | Slightly oil-wet |
| Normal sands | -0.06 | Neutral oleophylic partially |
| 0.3%OP-10 (embodiment one) | 0.04 | Neutrality is the most hydrophilic |
| 0.5%OP-10 (embodiment three) | 0.07 | Neutrality is the most hydrophilic |
| 0.7%OP-10 (embodiment four) | 0.09 | Neutrality is the most hydrophilic |
| 1.0%OP-10 (embodiment two) | 0.16 | Slightly water-wet |
It will be apparent to those skilled in the art that the control of the artificial sand rock core wetability of the present invention
Method includes the summary of the invention of the invention described above specification and any of detailed description of the invention part
Combination, does not has each scheme one these combinations constituted as space is limited and for making specification simple and clear
One describes.All within the spirit and principles in the present invention, any amendment of being made, equivalent,
Improve, should be included within the scope of the present invention.
Claims (10)
1. a control method for artificial sand rock core wetability, comprises the following steps according to sequencing:
Step one: use vibrating sieving machine sieve to take the quartz sand of different-grain diameter, and mix by a certain percentage；
Step 2: curing agent is put in insulating box and heat；
Step 3: wetting agent is added in the curing agent after heating, and stir and make it fully dissolve, then the material after dissolving adds in acetone, obtains the mixture containing wetting agent；
Step 4: the mixture containing wetting agent is added in quartz sand, adds epoxy resin and toughener, and stir, sieve, obtain the quartz sand with wetability；
Step 5: the quartz sand with wetability is loaded in core mould, is pressed into artificial sand rock core by hydraulic press, then artificial sand rock core is put into oven for curing, and naturally cool to room temperature, obtain the artificial sand rock core with wetability.
2. the control method of artificial sand rock core wetability as claimed in claim 1, it is characterised in that: in step one, the particle diameter of quartz sand is 40-60 mesh, 60-100 mesh and 100-200 mesh, and corresponding mixed proportion is 1:1:0.5-1.
3. the control method of artificial sand rock core wetability as claimed in claim 1, it is characterised in that: in step 2, the heating-up temperature of curing agent is 100-110 DEG C, the heat time is 2-3h.
4. the control method of the artificial sand rock core wetability as according to any one of claim 1-3, it is characterised in that: described curing agent, epoxy resin and toughener constitute cement.
5. the control method of artificial sand rock core wetability as claimed in claim 4, it is characterised in that: described curing agent, epoxy resin and toughener are respectively 7%, 63% and the 20% of described cement gross weight.
6. the control method of artificial sand rock core wetability as claimed in claim 5, it is characterised in that: described curing agent is ethylenediamine, and described toughener is dibutyl phthalate.
7. the control method of artificial sand rock core wetability as claimed in claim 4, it is characterised in that: described wetting agent is the 0.3-1.0% of quartz sand gross weight after mixing.
8. the control method of artificial sand rock core wetability as claimed in claim 8, it is characterised in that: described wetting agent is water-soluble nonionic Surfactant OP-10.
9. a control method for artificial sand rock core wetability, comprises the following steps according to sequencing:
Step one: use vibrating sieving machine sieve to take the quartz sand of different-grain diameter, and mix by a certain percentage, then 1/3rd of quartz sand gross weight carry out subsequent operation after weighing mixing, remaining 2/3rds standby；
Step 2: silicone oil is diluted, then the quartz sand of 1/3rd that the silicone oil addition after dilution is weighed stir, volatilizees under room temperature；
Step 3: the quartz sand after volatilization is put in electric drying oven with forced convection and heats, constant temperature drying, obtain the quartz sand with wetability；
Step 4: the quartz sand with wetability is added in the quartz sand of standby 2/3rds and stir, add curing agent, epoxy resin, toughener and acetone, and stir, sieve, obtain mixture；
Step 5: fill this blend in core mould, is pressed into artificial sand rock core by hydraulic press, then puts into oven for curing by artificial sand rock core, and naturally cool to room temperature, obtains the artificial sand rock core with wetability.
10. the control method of artificial sand rock core wetability as claimed in claim 9, it is characterised in that: in step one, the particle diameter of quartz sand is 40-60 mesh, 60-100 mesh and 100-200 mesh, and corresponding mixed proportion is 1:1:0.5-1.
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| CN108005634A (en) * | 2017-11-29 | 2018-05-08 | 中国石油大学(北京) | A kind of oil and gas reservoir physical model and its wetability universe quantify analogy method |
| CN108181144A (en) * | 2017-12-15 | 2018-06-19 | 浙江海洋大学 | A kind of production method of artificial oleophylic Sandstone Cores |
| 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 |
| CN116063687A (en) * | 2021-11-01 | 2023-05-05 | 中国石油化工股份有限公司 | Hydrophobic quartz sand and preparation method and application thereof |
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| CN101769151A (en) * | 2010-01-18 | 2010-07-07 | 刘其成 | Resistivity data collecting and processing method based on oil-water front |
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| CN108005634A (en) * | 2017-11-29 | 2018-05-08 | 中国石油大学(北京) | A kind of oil and gas reservoir physical model and its wetability universe quantify analogy method |
| CN108005634B (en) * | 2017-11-29 | 2020-08-11 | 中国石油大学(北京) | Oil and gas reservoir physical model and wettability global quantitative simulation method thereof |
| CN108181144A (en) * | 2017-12-15 | 2018-06-19 | 浙江海洋大学 | A kind of production method of artificial oleophylic Sandstone Cores |
| 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 |
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| CN116063687A (en) * | 2021-11-01 | 2023-05-05 | 中国石油化工股份有限公司 | Hydrophobic quartz sand and preparation method and application thereof |
| CN116063687B (en) * | 2021-11-01 | 2024-05-07 | 中国石油化工股份有限公司 | Hydrophobic quartz sand and preparation method and application thereof |
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