CN109187133A - The preparation method of preset microscopic damage artificial core - Google Patents
The preparation method of preset microscopic damage artificial core Download PDFInfo
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- CN109187133A CN109187133A CN201811085717.5A CN201811085717A CN109187133A CN 109187133 A CN109187133 A CN 109187133A CN 201811085717 A CN201811085717 A CN 201811085717A CN 109187133 A CN109187133 A CN 109187133A
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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
- G01N1/286—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
- G01N1/286—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
- G01N2001/2866—Grinding or homogeneising
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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
- G01N2001/2873—Cutting or cleaving
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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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Abstract
The present invention relates to a kind of preparation methods of preset microscopic damage artificial core, after mainly paraffin particles and cement slurry are mixed for the preparation method, it is put into mold and carries out solid model, sillar is obtained after demoulding, after carrying out curing in water, high temperature displacement, toluene washing oil to sillar again, Standard rock sample is finally obtained.Utilize Standard rock sample made from this method, realize the microscopic damage with admant wax simulation natural rock, it overcomes and was mixed with artificial core in proportion with cement, quartz sand merely in the past, it is only capable of the pore character and Penetration Signature of simulation natural rock, the defect for the microscopic damage that rock is subject in forming process can not be presented.The artificial core of preparation not only has the pore character and Penetration Signature of natural core, also with the damage seen thin inside natural core, and physical property is relatively stable and size is standard rock core, and the natural core that can replace reservoir completely carries out oil exploration and the desk research simulated experiment of Oil-Gas Field Development Engineering.
Description
Technical field
The present invention relates to a kind of preparation methods of preset microscopic damage artificial core, belong to artificial core technology of preparing neck
Domain.
Background technique
Rock type materials are a kind of non-uniform dielectrics, and each stage formed will be by a variety of destructions, it may be said that
Carefully seeing, upper angle rock interior structure is considerably complicated.In oil field prospecting and development and production, stratum truth is understood from not
Open core experiment analysis, natural core obtains source and is restricted and expensive, and the physical property of rock will receive acquisition again
The difference on ground and lead to difference.
The rock core of conventional method preparation does not account for the damage that rock interior is carefully seen, but rock interior carefully sees difference
The damage of degree often has crucial influence to physical properties such as the porosity of rock, permeability, compression strength, hardness.Currently,
Laboratory prepares that rock core is mixing cured in proportion frequently with cement and quartz sand, and this method has ignored rock interior and carefully sees
Damage, the artificial core made by this method have a certain difference in physical property with natural core.It is surveyed in oil gas
It visits in development process, if preparing simulated formation rock core using conventional method, necessarily cannot really understand formation properties.
Therefore, it is necessary to a kind of preparation methods of preset microscopic damage artificial core, so as to more true simulated formation rock.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of preparation method of preset microscopic damage artificial core.
Technical scheme is as follows:
The preparation method of preset microscopic damage artificial core, comprising the following steps:
(1) cement and quartz sand 1:(1-3 in mass ratio) is mixed, is stirred evenly, mixture A is made；
(2) the high-melting-point hard paraffin of volume accounting 5-15% is added into mixture A, by cement and water quality in mixture A
Measure than 1:(0.65-0.8) ratio water and uniform stirring is added, mixture B is made；
(3) mixture B is poured into the square dies of inner wall coating lubricating oil, demoulding obtains sillar after stablizing 12 hours,
Then by sillar maintenance submerged in water 25-30 days；
(4) after the completion of conserving, sillar by drilling through, cutting into diameter 48mm-54mm, the rock object of ratio of height to diameter 2-2.5
The general rock sample of Experimental Study On Mechanical Properties is managed, or cuts into diameter 25mm, the general rock of rock displacement property test of ratio of height to diameter 2-2.5
Sample；
(5) then by rock sample made from step (4) after 100 DEG C of oven heats stablize 24 hours, with kerosene to rock sample
Displacement 10PV or more；
(6) finally the rock sample after step (5) kerosene displacement is cleaned up in oil cleaning apparatus with toluene, band can be obtained
There is the artificial core of preset microscopic damage.
Preferably, in step (1), quartz sand selects 20 mesh or 50 mesh.
Preferably, in step (1), cement selection composite Portland cement.
Preferably, in step (1), the mass ratio of cement and quartz sand is 1:1.5,1:2.
Preferably, in step (2), high-melting-point hard paraffin selects Fischer-Tropsch wax or ceresin, the fusing point of high-melting-point hard paraffin are
96-100℃。
Preferably, in step (2), the shape of high-melting-point hard paraffin is spherical or coin shape.
Preferably, in step (2), the mass percent that water accounts for mixture B is 20-23%.
Preferably, in step (3), GB11121-95 model lubricating oil is selected in lubricating oil suggestion.
The beneficial effects of the present invention are:
1) preparation method of the preset microscopic damage artificial core of the present invention is realized thin with admant wax simulation natural rock
Damage is seen, overcomes and was mixed with artificial core in proportion with cement, quartz sand merely in the past, is only capable of the hole of simulation natural rock
The defect for the microscopic damage that rock is subject in forming process can not be presented in gap feature and Penetration Signature.
2) method of the invention for preparing rock core is simple, safety, is convenient for operation；The artificial core of preparation not only has natural rock
The pore character and Penetration Signature of the heart, also with the damage seen thin inside natural core, and physical property it is relatively stable and
Size is standard rock core, and the natural core that can replace reservoir completely carries out oil exploration and the interior of Oil-Gas Field Development Engineering is ground
The property studied carefully simulated experiment.
3) the place influence of natural core materials not only solved using standard rock core made from the method for the present invention, obtain and is stranded
Difficult, expensive experiment condition drawback in turn avoids the dispersion of experimental data caused by the complicated otherness because of natural core
The problem of property and date comprision difficulty.Formation rock property is studied in oil field prospecting and Oil-Gas Field Development Engineering to provide
Close to actual simulated experiment condition.
Detailed description of the invention
Fig. 1 is according to preset microscopic damage artificial core rock sample schematic diagram made from preparation method of the present invention.
Fig. 2 is the rock sample production flow diagram of the preparation method of the preset microscopic damage artificial core of the present invention.
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 depicted in figs. 1 and 2, the present embodiment provides a kind of preparation method of preset microscopic damage artificial core, the preparations
Method mainly comprises the steps that
(1) cement and quartz sand 1:3 in mass ratio are mixed, is stirred evenly, mixture A is made；Wherein cement is
Composite Portland cement, quartz sand select 20 purposes；
(2) preparing spherical Fischer-Tropsch wax, fusing point is 96 DEG C, the Fischer-Tropsch wax of volume accounting 5% is added into mixture A,
Water and uniform stirring is added by the ratio of cement in mixture A and water quality ratio 1:0.65, mixture B is made, final water accounts for mixed
The mass percent for closing object B is 20-23%；
(3) mixture B is poured into the square dies of inner wall coating lubricating oil, wherein lubricating oil selects GB11121-95 type
Number lubricating oil, demoulding obtains sillar after stablizing 12 hours, then by sillar maintenance submerged in water 25 days；
(4) after the completion of conserving, sillar by drilling through, cutting into diameter 48mm-54mm, the rock object of ratio of height to diameter 2-2.5
Manage the general rock sample of Experimental Study On Mechanical Properties；
(5) then by rock sample made from step (4) after 100 DEG C of oven heats stablize 24 hours, with kerosene to rock sample
Displacement 10PV or more；
(6) finally the rock sample after step (5) kerosene displacement is cleaned up in oil cleaning apparatus with toluene, band can be obtained
There is the artificial core of preset microscopic damage, which can be used as the Standard rock sample of subsequent experimental.
Not only have the pore character of natural core and infiltration special using artificial core prepared by the present embodiment technical solution
Property, also with the damage seen thin inside natural core, and physical property is relatively stable and size is standard rock core, completely may be used
To replace the natural core of reservoir to carry out oil exploration and the desk research simulated experiment of Oil-Gas Field Development Engineering.
Embodiment 2:
The present embodiment provides a kind of preparation method of preset microscopic damage artificial core, method and step such as 1 institutes of embodiment
It states, the difference is that: the quartz sand in step (1) selects 50 purposes, and cement and quartz sand 1:1 in mass ratio are mixed.
Embodiment 3:
The present embodiment provides a kind of preparation method of preset microscopic damage artificial core, method and step such as 1 institutes of embodiment
It states, the difference is that: cement and quartz sand 1:1.5 in mass ratio are mixed.
Embodiment 4:
The present embodiment provides a kind of preparation method of preset microscopic damage artificial core, method and step such as 1 institutes of embodiment
It states, the difference is that: cement and quartz sand 1:2 in mass ratio are mixed.
Embodiment 5:
The present embodiment provides a kind of preparation method of preset microscopic damage artificial core, method and step such as 1 institutes of embodiment
It states, the difference is that: in step (2), prepare nummular ceresin, fusing point is 100 DEG C, and body is added into mixture A
The ceresin of product accounting 15% is added water and uniform stirring by the ratio of cement in mixture A and water quality ratio 1:0.8, is made
Mixture B.
Embodiment 6:
The present embodiment provides a kind of preparation method of preset microscopic damage artificial core, method and step such as 1 institutes of embodiment
It states, the difference is that: in step (3), by sillar maintenance submerged in water 30 days；In step (4), sillar is cut into diameter
The general rock sample of rock displacement property test of 25mm, ratio of height to diameter 2-2.5, the rock sample can be used as subsequent oil-water displacement experiment standard
Rock sample.
Claims (8)
1. the preparation method of preset microscopic damage artificial core, which comprises the following steps:
(1) cement and quartz sand 1:(1-3 in mass ratio) is mixed, is stirred evenly, mixture A is made；
(2) the high-melting-point hard paraffin of volume accounting 5-15% is added into mixture A, by cement in mixture A and water quality ratio
Water and uniform stirring is added in ratio 1:(0.65-0.8), and mixture B is made；
(3) mixture B is poured into the square dies of inner wall coating lubricating oil, demoulding obtains sillar after stablizing 12 hours, then
By sillar maintenance submerged in water 25-30 days；
(4) after the completion of conserving, sillar by drilling through, cutting into diameter 48mm-54mm, the rock physics power of ratio of height to diameter 2-2.5
The general rock sample of property test is learned, or cuts into diameter 25mm, the general rock sample of rock displacement property test of ratio of height to diameter 2-2.5；
(5) then by rock sample made from step (4) after 100 DEG C of oven heats stablize 24 hours, with kerosene to rock sample displacement
10PV or more；
(6) finally the rock sample after step (5) kerosene displacement is cleaned up in oil cleaning apparatus with toluene, is can be obtained with pre-
Set the artificial core of microscopic damage.
2. the preparation method of preset microscopic damage artificial core as described in claim 1, which is characterized in that in step (1), stone
Sand selects 20 mesh or 50 mesh.
3. the preparation method of preset microscopic damage artificial core as described in claim 1, which is characterized in that in step (1), water
Mud selects composite Portland cement.
4. the preparation method of preset microscopic damage artificial core as described in claim 1, which is characterized in that in step (1), water
The mass ratio of mud and quartz sand is 1:1.5,1:2.
5. the preparation method of preset microscopic damage artificial core as described in claim 1, which is characterized in that high in step (2)
Fusing point hard paraffin selects Fischer-Tropsch wax or ceresin, and the fusing point of high-melting-point hard paraffin is 96-100 DEG C.
6. the preparation method of preset microscopic damage artificial core as described in claim 1, which is characterized in that high in step (2)
The shape of fusing point hard paraffin is spherical or coin shape.
7. the preparation method of preset microscopic damage artificial core as described in claim 1, which is characterized in that in step (2), water
The mass percent for accounting for mixture B is 20-23%.
8. the preparation method of preset microscopic damage artificial core as described in claim 1, which is characterized in that in step (3), profit
GB11121-95 model lubricating oil is selected in lubricating oil suggestion.
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| CN201811085717.5A CN109187133A (en) | 2018-09-18 | 2018-09-18 | The preparation method of preset microscopic damage artificial core |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443886A (en) * | 2019-01-15 | 2019-03-08 | 中国石油大学(华东) | A kind of simulation core production method for determining pore throat and particle surface properties |
| CN110864944A (en) * | 2019-11-06 | 2020-03-06 | 大庆油田有限责任公司 | Preparation method of artificial rock core for simulating irregular natural cracks of cement sheath of ternary composite flooding well |
| CN111060366A (en) * | 2019-12-13 | 2020-04-24 | 中国海洋石油集团有限公司 | Artificial core manufacturing method for simulating borehole drilling |
| CN112857935A (en) * | 2021-01-22 | 2021-05-28 | 上海大学 | Preparation method of large-grade-difference heterogeneous nonmagnetic core |
| CN114199647A (en) * | 2021-12-13 | 2022-03-18 | 四川大学 | Rock mass in-situ stress curing method and curing system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443886A (en) * | 2019-01-15 | 2019-03-08 | 中国石油大学(华东) | A kind of simulation core production method for determining pore throat and particle surface properties |
| CN110864944A (en) * | 2019-11-06 | 2020-03-06 | 大庆油田有限责任公司 | Preparation method of artificial rock core for simulating irregular natural cracks of cement sheath of ternary composite flooding well |
| CN110864944B (en) * | 2019-11-06 | 2022-07-19 | 大庆油田有限责任公司 | Preparation method of artificial rock core for irregular natural cracks of cement sheath of oil-water well |
| CN111060366A (en) * | 2019-12-13 | 2020-04-24 | 中国海洋石油集团有限公司 | Artificial core manufacturing method for simulating borehole drilling |
| CN112857935A (en) * | 2021-01-22 | 2021-05-28 | 上海大学 | Preparation method of large-grade-difference heterogeneous nonmagnetic core |
| CN112857935B (en) * | 2021-01-22 | 2022-11-18 | 上海大学 | Preparation method of large-grade-difference heterogeneous nonmagnetic core |
| CN114199647A (en) * | 2021-12-13 | 2022-03-18 | 四川大学 | Rock mass in-situ stress curing method and curing system |
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