CN111175110A - Method for manufacturing artificial flat rock core multi-angle cracks - Google Patents
Method for manufacturing artificial flat rock core multi-angle cracks Download PDFInfo
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- CN111175110A CN111175110A CN202010133377.XA CN202010133377A CN111175110A CN 111175110 A CN111175110 A CN 111175110A CN 202010133377 A CN202010133377 A CN 202010133377A CN 111175110 A CN111175110 A CN 111175110A
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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
- G01N1/36—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
- G01N1/36—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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Abstract
The invention relates to a method for manufacturing a multi-angle crack of an artificial flat rock core, which comprises the following steps: designing and manufacturing a pressing plate, wherein the pressing plate is provided with a cylindrical pore channel; manufacturing a multi-angle crack auxiliary part, wherein the multi-angle crack auxiliary part is used for being inserted into a cylinder pore passage; manufacturing a cutter, wherein the size of the cutter is consistent with the size of a preset crack; manufacturing a flat plate crack core, inserting a multi-angle crack auxiliary piece into a cylindrical pore passage of a pressing plate while pressing the core, inserting a cutter into the core through the multi-angle crack auxiliary piece, and rotating the multi-angle crack auxiliary piece to enable the cutter to reach a specified angle to form a crack in the core; taking out the cutter and the multi-angle crack auxiliary piece, and pulling out the pressing plate; and after drying the core, filling the pressed preset cracks by using large-particle-size quartz sand, filling the rest cracks by using a quartz sand mixture which is the same as the core, and compacting. The invention can realize the formation of multi-angle cracks while ensuring the accuracy of the sizes and the positions of the cracks.
Description
The technical field is as follows:
the invention relates to the field of artificial core preparation processes, in particular to a method for manufacturing multi-angle cracks of an artificial flat core.
Background art:
the artificial rock core manufacturing technology in the field of petroleum research is very wide, but related crack manufacturing technologies and the like are still to be further improved. At present, two methods are mainly used for manufacturing artificial flat rock core cracks, one method is to adopt a mode of combining a wallpaper cutter and a ruler, after rock core pressing is finished, according to the size and angle of the cracks required by experiments, the position accuracy is guaranteed by the ruler on each rock core, the wallpaper cutter is used for cutting the cracked rock core to form cracks, but the method wastes time and labor in the process of forming the cracks, the formed cracks are extremely irregular, and the edges are rough and irregular; the other method is to put a hard plastic film at the preset crack position of each core to meet the size of the crack, and draw out the plastic film before the core is completely solidified to form the crack.
The invention content is as follows:
the invention aims to provide a method for manufacturing multi-angle cracks of an artificial flat plate core, which is used for solving the problems that the existing method for manufacturing cracks of the artificial flat plate core is time-consuming and labor-consuming and can not meet the requirements.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for manufacturing the multi-angle fracture of the artificial flat rock core comprises the following steps:
(1) designing and manufacturing a pressing plate, wherein the size of the pressing plate is determined according to a flat plate crack core to be manufactured, the pressing plate is provided with a cylindrical pore passage, the cylindrical pore passage is a through hole arranged along the thickness direction of the pressing plate, and the cylindrical pore passage is formed by connecting two coaxial circular holes with different diameters;
(2) manufacturing a multi-angle crack auxiliary part, wherein the multi-angle crack auxiliary part is composed of two cylinders which are coaxial and have different diameters, the shape of the multi-angle crack auxiliary part is matched with a cylinder pore passage, and the multi-angle crack auxiliary part is used for being inserted into the cylinder pore passage; a cuboid pore passage is arranged in the middle of the multi-angle crack auxiliary piece and penetrates through the multi-angle crack auxiliary piece along the axial direction, and the size of the cuboid pore passage corresponds to a preset crack;
(3) manufacturing a cutter, wherein the upper end of the cutter is provided with a cylindrical joint, and the size of the cutter is consistent with the size of a preset crack;
(4) preparing a flat crack core, firstly, placing a mold, mixing quartz sand with different meshes and epoxy resin glue according to a certain proportion, rubbing the mixture uniformly to obtain a quartz sand mixture, and placing the quartz sand mixture into the mold; covering a pressing plate, inserting the multi-angle crack auxiliary piece into a cylindrical pore channel of the pressing plate, and pressing the pressing plate downwards to enable the height of the quartz sand mixture to be 1cm more than that of the core; thirdly, inserting a cutter into the rock core along the cuboid pore channel, and rotating the multi-angle crack auxiliary member to enable the cutter to reach a specified angle, so that cracks can be formed in the rock core conveniently; fourthly, continuously pressing the pressing plate for 1cm until the height of the core is reached; fifthly, taking out the cutter and the multi-angle crack auxiliary piece, and lifting out the pressing plate;
(5) and after drying the rock core, calculating the volume of the required large-particle-size quartz sand according to the size of the preset crack, filling the pressed preset crack by using the large-particle-size quartz sand, filling the rest part of the crack with a quartz sand mixture which is the same as that of the rock core, and compacting.
According to the scheme, in the step (1), the design thickness of the pressing plate is 30mm, the cylinder through hole in the pressing plate is accurately designed as required, the conversion of various angles of a crack can be realized, the simulation accuracy is guaranteed, the pressing plate is made of an aluminum alloy plate, the size of the pressing plate is larger than that of a flat crack core, the flat crack core is 4mm, 4mm, 4mm and 34mm away from the edges of the long edge and the short edge of the pressing plate respectively, and the permeability and the accurate core size can be conveniently measured.
In the scheme, the height of the two coaxial cylinders with different diameters in the step (2) is 15 mm.
Putting a mould in the step (4) of the scheme, mixing quartz sand and epoxy resin glue with different meshes according to a proportion to obtain three mixtures, and putting the three mixtures into the mould in layers; and covering a pressing plate, ensuring that the upper end of the cutter is positioned on the same horizontal plane after the cutter is inserted into the rock core along the cuboid pore channel, continuously pressing to the preset rock core thickness, taking out the cutter and the auxiliary part, and pulling out the pressing plate.
The invention has the following beneficial effects:
1. the invention adopts a new process, adopts a mode of combining the pressing plate, the auxiliary piece and the cutter, can realize the preparation of multi-angle cracks while ensuring the size of the cracks and the space positions of the cracks to be accurate, and forms corresponding cracks after the pressing of the rock core is finished.
2. The crack at different angles can be prepared, only one mold can be used for meeting the requirements of a large number of different cracks, the used mold is simple to manufacture, can be used for a long time and is not easy to deform, the material is simple, the source is wide, the manufacturing process is simple, and the mold can be repeatedly used.
Description of the drawings:
FIG. 1 is a schematic view of the structure of the pressing plate of the present invention.
FIG. 2 is a schematic view of a multi-angle crack auxiliary member according to the present invention.
FIG. 3 is a schematic view of the structure of the cutter of the present invention.
Fig. 4 is an assembly schematic of the present invention.
In the figure: 1 clamp plate, 2 multi-angle crack auxiliary members, 3 cutters, 4 flat plate crack rock cores, 5 producing wells, 6 cylinder pore canals, 7 injection wells, 8 cuboid pore canals and 9 cylinder connectors.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
referring to fig. 1 to 4, the method for manufacturing the multi-angle fracture of the artificial flat rock core comprises the following steps:
(1) a pressing plate is designed by using SolidWorks software, the thickness of the pressing plate 1 is 30mm, and the length and width dimensions are determined according to a flat plate fracture core 4 to be prepared according to experimental requirements. The accurate design cylinder through-hole is carried out as required on clamp plate 1, guarantees to realize the conversion of the various angles of crack, guarantees the accuracy of simulation, designs two coaxial cylinder pore 6 of different diameters at clamp plate 1 upper and lower both ends. Selecting an aluminum alloy plate with proper hardness, and milling holes by using a numerical control machine according to the design, as shown in figure 1; the 1 size of clamp plate is bigger than dull and stereotyped rock core, can guarantee that the rock core is 4mm, 4mm, 4mm, 34mm respectively apart from the edge of aluminium alloy plate long limit and minor face, is convenient for survey permeability and accurate rock core size.
(2) Manufacturing a multi-angle crack auxiliary part, wherein the main body of the auxiliary part is a cylinder, the upper end of the auxiliary part is provided with a cylinder boss, the heights of the two coaxial cylinders are both 15mm, and the diameters of the two coaxial cylinders are set according to the experimental requirements and correspond to the pressure plate 1; has a centrally designed rectangular solid tunnel 8 through the coaxial cylinder, the dimensions of which correspond to the predetermined cracks, as shown in fig. 2. The size of the multi-angle crack auxiliary part 2 is consistent with that of the through hole on the pressing plate 1, so that the integrity of the pressing plate 1 is ensured; the preparation of multi-angle cracks can be realized through rotating the matched cutter 3.
(3) The preparation cutter, according to the experiment needs design with predetermine the unanimous cutter 3 of crack size, 3 upper ends of cutter have the cylinder of take-up 9 of take-up height, and the crack on the clamp plate 1 has just in time been put into to the size of cutter 3, has guaranteed to form the accurate nature of crack size, and cylinder connects 9 cooperation auxiliary members and rotatory and be convenient for take out the cutter after the suppression is accomplished, like figure 3.
(4) The method comprises the following steps of manufacturing a flat fracture core, firstly, placing a mold, mixing quartz sand with different meshes and epoxy resin glue according to a certain proportion, rubbing the mixture until the mixture is uniform to obtain a mixture of three types of quartz sand, and placing the mixture into the mold in a layered mode. And secondly, covering the pressing plate 1, inserting the multi-angle crack auxiliary part 2, and pressing the quartz sand mixture in the mold to a height 1cm more than that of the core. And thirdly, inserting the cutter 3 into the rock core from the cuboid pore channel 8, ensuring that the upper end is positioned at the same horizontal plane, and rotating the multi-angle crack auxiliary part 2 to enable the cutter 3 to reach a specified angle, so that cracks can be conveniently formed in the rock core. And fourthly, continuously pressing to the core depth. And fifthly, taking out the cutter 3 and the multi-angle crack auxiliary part 2, and taking out the pressing plate 1.
(5) After the rock core is dried, the rock core has high strength, large-particle-size quartz sand is used for filling cracks, the volume of the required large-particle-size quartz sand is calculated according to the size of the cracks required by experiments, pressed preset cracks are filled, the rest depth part is filled with quartz sand mixture which is the same as the rock core, homogeneity is guaranteed, the rock core cannot be crushed, and compaction is carried out.
Example 1:
this example produced a flat core with a length, width, height of 300mm 45mm with two fractures with a length, width, 30mm 3mm, laterally on the diagonal of the injection and production wells, 30mm from the injection and production wells, 0 ° from the injection and production direction, vertically down from the 10mm core depth, and a fracture depth of 20 mm. The preparation process mainly comprises the following steps:
(1) the pressing plate 1 is designed by using solidworks software, two cylinder holes 6 are designed on the pressing plate 1, the diameter of the upper part of each cylinder hole 6 is 50mm, the depth of each cylinder hole is 15mm, the diameter of the lower part of each cylinder hole is 40mm, the depth of each cylinder hole is 15mm, the cylinder holes penetrate through the pressing plate 1, and the center of each cylinder is located on the diagonal line of an injection well 7 and a production well 5 and is 30mm away from the injection well and the production well respectively. And (3) processing the aluminum alloy pressing plate with the size of 308mm 338mm 30mm to ensure that the distance between the core and the edges of the long side and the short side of the aluminum alloy plate is 4mm, 4mm, 4mm and 34mm respectively, and milling the well position and the cylindrical through hole as shown in figure 1.
(2) The multi-angle crack auxiliary part 2 is manufactured, the size of the multi-angle crack auxiliary part is consistent with that of a cylindrical pore passage 6 on the pressing plate 1, 1 through crack groove (cuboid pore passage 8) is designed on each auxiliary part, and the length and the width of each crack groove are designed to be 31mm 3.5mm according to needs and matched with a cutter, as shown in figure 2.
(3) Make cutter 3, according to the experiment needs, 3 sizes of cutter are unanimous with presetting the crack, and length is wide for 30mm 3mm, and the degree of depth is 60mm, can insert the predetermined position that the crack needs, processes a cylinder joint 9 that highly is 30mm in 3 one end of cutter for the cooperation auxiliary member rotates and realizes multi-angle crack, and takes out the cutter after conveniently suppressing the rock core, as figure 3.
(4) Manufacturing a flat fracture core 4, placing a mould, mixing quartz sand and glue with different meshes according to a proportion to obtain three mixtures, adding the three mixtures into the mould in a layering manner, covering a pressing plate 1, and inserting an auxiliary piece to press the mixture to 5.5 cm.
(5) And (3) placing the cutter 3 in a cuboid duct 8 of the multi-angle crack auxiliary part 2, rotating to a specified angle, and pressing the core from 5.5cm to 4.5cm as shown in figure 4. And finally, taking out the cutter 3 and the multi-angle crack auxiliary part 2 and starting the pressing plate 3.
(6) After drying the core, the required volume was calculated using 120 mesh quartz sand as filler according to the length, width, height of the fracture 30mm 3mm 20mm, the preset fracture was filled, the remaining depth was filled with the same mixture as the core, and compacted.
Compared with the two methods in the prior art, the method has the advantages that the cracks are directly formed in the process of pressing the rock core, time and labor are saved, and the size and the position of the formed cracks can be ensured to be accurate; the formation of the cracks at various angles can be realized by only one die, and the crack forming process is greatly simplified. Therefore, the artificial flat plate core multi-crack manufacturing method has important significance for petroleum artificial core displacement experiments and perfecting artificial core preparation processes.
Claims (4)
1. A method for manufacturing multi-angle cracks of an artificial flat rock core is characterized by comprising the following steps:
(1) designing and manufacturing a pressing plate, wherein the size of the pressing plate (1) is determined according to a flat plate crack core (4) to be manufactured, the pressing plate (1) is provided with a cylindrical pore passage (6), the cylindrical pore passage (6) is a through hole arranged along the thickness direction of the pressing plate (1), and the cylindrical pore passage (6) is formed by connecting two coaxial circular holes with different diameters;
(2) manufacturing a multi-angle crack auxiliary part, wherein the multi-angle crack auxiliary part (2) is composed of two cylinders which are coaxial and have different diameters, the shape of the multi-angle crack auxiliary part (2) is matched with a cylinder pore passage (6), and the multi-angle crack auxiliary part (2) is used for being inserted into the cylinder pore passage (6); a cuboid pore passage (8) is arranged in the middle of the multi-angle crack auxiliary piece (2), the cuboid pore passage (8) axially penetrates through the multi-angle crack auxiliary piece (2), and the size of the cuboid pore passage (8) corresponds to a preset crack;
(3) manufacturing a cutter, wherein the upper end of the cutter (3) is provided with a cylindrical joint () 9, and the size of the cutter (3) is consistent with the size of a preset crack;
(4) preparing a flat crack core, firstly, placing a mold, mixing quartz sand with different meshes and epoxy resin glue according to a certain proportion, rubbing the mixture uniformly to obtain a quartz sand mixture, and placing the quartz sand mixture into the mold; covering a pressing plate, inserting the multi-angle crack auxiliary piece (2) into a cylindrical pore passage (6) of the pressing plate (1), and pressing down the pressing plate (1) to enable the height of the quartz sand mixture to be 1cm more than that of the core; thirdly, inserting the cutter (3) into the rock core along the cuboid pore channel (8), and rotating the multi-angle crack auxiliary piece (2) to enable the cutter (3) to reach a specified angle, so that cracks can be formed in the rock core conveniently; fourthly, continuously pressing the pressing plate (1) for 1cm until the height of the core is reached; fifthly, taking out the cutter (3) and the multi-angle crack auxiliary piece (2) and pulling out the pressing plate (1);
(5) and after drying the rock core, calculating the volume of the required large-particle-size quartz sand according to the size of the preset crack, filling the pressed preset crack by using the large-particle-size quartz sand, filling the rest part of the crack with a quartz sand mixture which is the same as that of the rock core, and compacting.
2. The method for manufacturing the artificial flat rock core multi-angle fracture as claimed in claim 1, wherein the method comprises the following steps: step (1) well clamp plate design thickness be 30mm, carry out the cylinder through-hole on the accurate design clamp plate as required, guarantee to realize the conversion of the various angles of crack, guarantee the accuracy of simulation, clamp plate (1) material adopts aluminium alloy plate, its size is bigger than dull and stereotyped crack rock core, dull and stereotyped crack rock core (4) are 4mm, 4mm, 4mm, 34mm respectively apart from the edge of clamp plate (1) long limit and minor face, be convenient for survey permeability and accurate rock core size.
3. The method for manufacturing the artificial flat rock core multi-angle fracture as claimed in claim 2, wherein the method comprises the following steps: and (3) in the step (2), the heights of the two cylinders which are coaxial and have different diameters are both 15 mm.
4. The method for manufacturing the multi-angle fracture of the artificial flat rock core according to claim 3, wherein the method comprises the following steps: placing a mould in the step (4), mixing quartz sand and epoxy resin glue with different meshes according to a proportion to obtain three mixtures, and placing the three mixtures into the mould in layers; covering a pressing plate (1), inserting the cutter (3) into the rock core along the cuboid pore passage (8), ensuring that the upper end is positioned at the same horizontal plane, continuously pressing to the preset rock core thickness, taking out the cutter (3) and the auxiliary part, and pulling out the pressing plate (1).
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| CN202010133377.XA CN111175110A (en) | 2020-03-01 | 2020-03-01 | Method for manufacturing artificial flat rock core multi-angle cracks |
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| CN202010133377.XA CN111175110A (en) | 2020-03-01 | 2020-03-01 | Method for manufacturing artificial flat rock core multi-angle cracks |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112903396A (en) * | 2021-03-02 | 2021-06-04 | 东北石油大学 | Rock core grooving tool for fracture toughness experiment and grooving method thereof |
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