AU2020101616A4 - A device for simulating local fracturing core making and multi-stage fracture monitoring - Google Patents
A device for simulating local fracturing core making and multi-stage fracture monitoring Download PDFInfo
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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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
- G01N23/20066—Measuring inelastic scatter of gamma rays, e.g. Compton effect
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
-
- 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
Abstract
The invention discloses a simulated local fracturing core production and multi-stage
fracture monitoring device, which includes a material blending system, a pressure loading
system, a core forming system, a fracturing system and a y-CT scanning device. The provided
mold can produce cores with different volume shapes according to requirements, and cores
with different crack (or interlayer) characteristics and various local brittle characteristics and
shapes, which solves the problem that models of traditional mold are fixed; Cracks (or
interlayers) with different characteristics can be made by changing the thickness, shape,
location, size and mineral composition of the adhesive sheet; According to the need, by
changing the type and quantity of core materials, the cores with different mineral contents and
different local brittleness characteristics can be produced, so as to meet the various needs of
the test; The integration of core making and fracturing is realized, which makes the test more
automatic and convenient.
Description
A device for simulating local fracturing core making and multi-stage fracture monitoring
[01] The invention relates to a hydraulic fracturing monitoring device, in particular to a functional fracturing core making and multi-stage fracture monitoring device simulating local characteristics, belonging to the technical field of petroleum engineering.
[02] At present, hydraulic fracturing technology is widely used in petroleum engineering as a measure to increase production. Through hydraulic fracturing technology, a good oil-gas seepage channel is formed in the reservoir. Establishing oil flow channel between formation and bottom hole can increase oil and gas production and increase oil and gas production greatly. The brittleness of rock is an important parameter that affects and controls the fracture evolution mechanism and the formation of fracture network. This invent analyzes the influence of rock heterogeneity and natural fracture development on rock brittleness, which is of great significance in
guiding fracture strike and improving reservoir volume. It is found that the macro brittle fracture of rock mass is the process of the local crack initiation and expansion under the action of external load. Macro fracture is the appearance of local fracture after reaching a certain degree, and local fracture is the fundamental reason of macro fracture. The study of local brittleness of rock can reveal the intrinsic nature of fracture behavior and reflect the evolution mechanism of fracture more directly and accurately. However, during the fracturing process, there are many conditions to obtain natural cores. Most of the cores used in the tests are artificial fractured cores, and there is no obvious brittle stratification, which poses a great challenge to the study of local brittleness characteristics of natural cores. In the process of making natural cores, the existing technical problems are as follows:
(1) When making natural cores by materials, natural fractures need to be made in advance. Most experimenters prepare cores by internal inclusion method. In the process of core preparation, the shape of prefabricated fractures is easy to change, or the internal inclusions affect the fracture propagation, which will affect the actual fracturing effect;
(2) Most of the test cores are prepared under conventional experimental conditions and lack of underground stress state, which is quite different from the formation conditions of natural fractures. Although the condition of in-situ stress is simulated in the subsequent fracturing process, it is still quite different from the actual fracturing engineering;
(3) In the process of core making, it is impossible to simulate the phenomenon of different local brittleness during actual fracturing;
(4) In the process of fracturing, the actual situation of fracturing can not be monitored and described in real time, and the fracture propagation can not be effectively monitored. The above problems of core preparation and fracturing monitoring have not been well solved. This invention aims to solve the above-mentioned technical problems of functional core preparation with natural fracture and local brittleness and real-time monitoring during fracturing process.
[03] The purpose of the invention is to provide a simulated local fracturing core making and multi-stage fracture monitoring device to solve the problem.
[04] The purpose of the invention is achieved through the following technical scheme: a device for simulating local fracturing core production and multi-stage fracture monitoring, including a material mixing system, a pressure loading system, a core forming system, a fracturing system and a y-CT scanning device. The material mixing system is connected with a porous partition mold device in the core forming system through a material conveying pipeline. The pressure loading system acts on the core forming system and the porous partition mold device in the fracturing system respectively, and the formed core made in the core forming system is sent to they-CT scanning device through the slide way.
[05] The material mixing system comprises a transmission system, a core material manufacturing tank, a flow control valve, a raw material conveying pipeline, a mixing material tank, a core material conveying pipeline and a conveying control valve, The core raw material making tank transports the core raw material to the mixing material tank through the raw material conveying pipeline. And a flow control valve is installed on the raw material conveying pipeline, a stirrer is arranged in the mixing material tank, and the stirrer rotates through a transmission system, wherein the transmission system comprises a raw material stirrer group and a transmission rod, and the raw material stirrer group is connected with the stirrer through the transmission rod.
[06] The pressure loading system comprises a gas transmission line, a gas flow and pressure control valve, a pressure monitoring system, a gas storage tank and a pressure control unit. The gas outlet end of the gas storage tank is connected with a gas transmission pipeline and one end of the gas transmission pipeline is equipped with a gas flow rate and pressure control valve. The gas flow rate and pressure control valve are connected with a pressure monitoring system and the other end of the gas transmission pipeline is connected with a pressure control unit.
[07] The core forming system comprises a pressure applying device, a shock absorbing pad and a porous separator mold device. One end of the pressure applying device is connected with the pressure loading system, and the other end of the pressure applying device is abutted on the outer surface of the porous separator mold device through the shock absorbing pad.
[08] The pressure applying device comprises a gas pipeline, a connecting shaft and a gas drive telescopic rod, wherein one end of the gas pipeline is communicated with a gas transmission pipeline, the other end of the gas pipeline is respectively communicated with the gas drive telescopic rod and a plurality of the gas drive telescopic rods are connected through the connecting shaft;
[09] The fracturing system comprises a pressure plate, a fracturing device, a fracture monitoring system and a porous separator mold device. The fracturing device is internally provided with a porous diaphragm mold device. The two sides of the porous diaphragm mold device are respectively clamped with pressure plates. The porous diaphragm mold device is connected with a crack monitoring system and the porous diaphragm mold device is connected with another pressure loading system through a gas conveying channel;
[010] The porous separator mold device consists of a transparent plexiglass plate, a radiant adhesive and a core material injection control hole, wherein the radiant adhesive is filled on the inner cavity separator of the porous separator mold device and core material injection control holes are provided on both sides of the porous separator mold device and connected with a material conveying pipeline.
[011] A transparent plexiglass plate is arranged at the top end of the porous partition plate mold device. The shape and arrangement of the adhesive plate interlayer inside the porous partition plate mold device, the mineral composition in the adhesive and the position where the material pipeline is connected to the plate can be changed according to actual manufacturing requirements.
[012] The core forming system and the porous partition plate mold device in the fracturing system are slidably arranged by being installed in a slideway.
[013] Wedge-shaped rubber sealing plates are squared at the four corners of the porous partition plate mold device, and the force applying device of the porous partition plate mold device is installed in the force applying device slideway.
[014] The fracturing system is a coupling of a fracturing device and y-CT scanning device. The fracturing device performs fracturing according to the pressure and data provided by the pressure application system. y-CT scanning device converts radiant adhesive thin plate from flat plate to adhesive, cements released minerals, completes core cementation and fracture formation at the same time, monitors and records the whole fracturing process, and describes the formation law of multi-stage fractures in detail.
[015] For the core manufactured by the porous separator mold device, cracks can exist in one brittle medium or span different brittle media. The local brittleness characteristics, crack morphology and interlayer can be changed by changing the size, shape, arrangement and mineral composition of the adhesive sheet.
[016] The radiation-type adhesive is added with fluorescent materials and corresponding mineral components as required to realize different functions. Under the y radiation emitted by the y-CT scanning device, the radiation-type adhesive changes the adhesive thin plate from a flat plate to a cemented shape, and the minerals released in the adhesive are cemented, or the foaming agent in the adhesive is foamed with water to form cracks.
[017] A radiation-type adhesive may not be arranged in that porous partition plate mold device. Each layer of the porous partition plate mold device is in a horizontal position and the mold is gently vibrate after each layer is injected, so that each layer is horizontally added with another layer.
[018] The invention relates to an operation step of a device for simulating local fracturing core manufacturing and multi-stage fracture monitoring, which comprises the following steps:
Step 1: prepare the materials for core making as required, put the core materials into different core preparation raw material pools (4), start the raw material mixing unit (2), slowly open the flow control valve (5), and input the core raw materials into the mixing pool while stirring, and mix the mixed materials evenly. The flow of core material is controlled by pipeline and flow control device;
Step 2: input the required data into the monitoring system as the starting condition, and then start the pressure loading system (16) and the porous partition mold device (30). According to the test requirements, install the radiation adhesive (22) sheet into the porous plate, observe the mold installation, and after the device is closed, install the wedge-shaped rubber sealing plate (32), and determine the sealing effect. According to different local brittleness characteristics, the corresponding core material delivery pipeline (10) is connected with the corresponding hole on the flat plate, the input control valve (11) is opened, and the mixed raw material is continuously stirred, so that the core material is smoothly transported to the closed mold. When the core material is filled with the mold, the conveying control valve (11) is closed, and then the whole core material conveying system is closed;
Step 3: after the core material solidifies, open the mold and send the core along the slide to the core y-CT scanning device (38), scan the core, observe the cementation transformation of adhesive sheet, and close the y-CT scanning device (38) after the core cementation is completed; and
Step 4: send the core (37) along the slide (24) into the core fracturing chamber (39), and fix the core (37); input relevant parameters into the fracturing monitoring system in advance, start the fracturing system, and pay attention to observation;
Step 5: after the experiment, export and sort out the data, gently take out the tested core (37), clean the test device and equipment, and turn off the power supply.
[019] FIG. 1 is a schematic view of that overall structure of the apparatus of the present invention.
[020] Fig. 2 is a schematic top view of that structure of the perforate separator mold apparatus of the present invention;
[021] Fig. 3 is a schematic structural diagram of that pressure apply device of the present invention;
[022] Fig. 4 is a schematic view of that core movement structure of the present invention;
[023] Fig. 5 is a schematic structural diagram of that fracturing device of the present invention.
[024] In the figure: 1. Material blending system; 2. That raw material mix unit; 3. Transmission system; 4.a core raw material manufacture tank; 5. Flow control valve; 6. Raw material transport pipeline; 7. Mix material tank; 8. Drive rod; 9. Agitator; 10. Core material transport pipeline; 11. Delivery control valve; 12. Material transport pipeline; 13. Gas transmission line; 14. Gas flow and pressure control valve; 15.
Pressure monitor system; 16. A pressure load system; 17. Gas storage tank; 18. Pressure control unit; 19. Pressure apply means; 20. Shock cushion; 21. transparent plexiglass plate; 22. radiant adhesive; 23. core material injection control hole; 24.slideway; 25.core forming system; 26. gas delivery channel; 27. pressure plate; 28. fracturing device; 29. fracture monitoring system; 30. porous partition plate mold device; 31. force applying device slideway; 32. wedge rubber sealing plate; 33. force applying device; 34. gas pipeline; 35. connecting shaft; 36.gas drive telescopic rod; 37. core; 38.-CT scanning device; 39.core fracturing chamber.
[025] A clear and complete description will be made of that technical aspect of the embodiments of the present invention in connection with the accompany drawings in which the embodiments of the present invention are taken. It will be apparent that the described embodiments are only part of the embodiments of the present invention but not all of the embodiments of the present invention. Based on the embodiments in the invention, all other embodiments obtained by those of ordinary skill in the art without creative work should fall within the scope of protection of the invention.
[026] Refer to Figures 1-5, a device for simulating local fracturing core manufacture and multi-stage fracture monitoring comprises a material blending system 1, a pressure loading system 16, a core forming system 25, a fracturing system and a 7 CT scanning device 38. The material blending system 1 is connected to the porous diaphragm mold device 30 in the core forming system 25 through the material conveying line 12. The pressure loading system 16 acts on the core forming system 25 and the porous diaphragm mold device 30 in the fracturing system respectively, and the formed cores 37 produced in the core forming system 25 are sent to they-CT scanning device 38 via the slideway 24;
[027] The material mixing system 1 comprises a transmission system 3, a core material manufacturing tank 4, a flow control valve 5, a material conveying pipeline 6, a mixing material tank 7, a core material conveying pipeline 10 and a conveying control valve 11. The core raw material production tank 4 transports the core raw material to the mixing material tank 7 through the raw material transfer line 6. And a flow control valve 5 is installed on the raw material conveying line 6, and a stirrer 9 is arranged in the mixing material tank 7. The stirrer 9 rotates through a transmission system 3, which comprises a raw material mixer group 2 and a transmission rod 8. The raw material mixer group 2 is connected to the stirrer 9 through the transmission rod 8.
[028] The pressure loading system 16 comprises a gas delivery line 13, a gas flow and pressure control valve 14, a pressure monitoring system 15, a gas storage tank 17 and a pressure control unit 18. The outlet end of the gas storage tank 17 is connected with a gas transmission line 13 and one end of the gas transmission line 13 is provided with a gas flow and pressure control valve 14, which is connected with a pressure monitoring system 15. The other end of the gas transmission line 13 is connected with a pressure control unit 18.
[029] The core forming system 25 comprises a pressure applying device 19, a shock absorbing pad 20 and a perforated baffle mold device 30. One end of the pressure applying device 19 is connected to the pressure loading system 16, and the other end of the pressure applying device 19 is abutted against the outer surface of the perforated baffle mold device 30 by the shock absorbing pad 20.
[030] The pressure applying device 19 comprises a gas pipe 34, a connecting shaft and a gas drive telescopic rod 36. One end of the gas pipe 34 is communicating with the gas transmission line 13, and the other end of the gas pipe 34 is communicating with the gas drive telescopic rod 36 respectively. A plurality of the gas drive telescopic rods 36 are connected through the connecting shaft 35.
[031] The fracturing system comprises a pressure plate 27, a fracturing device 28, a fracture monitoring system 29 and a porous baffle mold device 30. The fracturing device 28 is internally provided with a porous diaphragm mold device 30, the two sides of which are respectively sandwiched with pressure plates 27. The porous diaphragm mold device 30 is connected with a fracture monitoring system 29, and it is connected with another pressure loading system 16 through a gas delivery channel 26.
[032] The porous separator mold device 30 is composed of a transparent plexiglass plate 21, a radiant adhesive 22 and a core material injection control hole 23. The radiant adhesive 22 is filled in the inner cavity separator of the porous separator mold device 30, and a core material injection control hole 23 is formed at both sides of the porous separator mold device 30 and connected with a material conveying line 12.
[033] A transparent plexiglass plate 21 is placed at the top end of the porous separator mold device 30. The shape and arrangement of the adhesive plate interlayer inside the porous partition plate mold device 30, the mineral composition in the adhesive and the position where the material pipes are connected to the plate can be changed according to the actual manufacturing requirements. Various cores with different local brittleness characteristics can be made, and cores with different fracture characteristics or interlayers can also be made.
[034] The core forming system 25 and the porous baffle mold device 30 in the fracturing system are slidably arranged by being installed on the slideway 24 to facilitate the movement of the porous baffle mold device 30 in different positions.
[035] Wedge-shaped rubber sealing plates 32 are squared at the four corners of the porous partition mold device 30, and the force applying device 33 of the porous partition mold device 30 is installed in the force applying device slideway 31.
[036] The fracturing system is the coupling of the fracturing device 28 with the y-CT scanning device 38. The fracturing device 28 performs fracturing according to the pressure and data provided by the pressure application system 1. A y-CT scanning device 38 converts that thin plate of the radiant adhesive 22 from a flat plate to an adhesive, cements the released mineral, simultaneously completes the cementation of the core 37 and the formation of fractures, and monitors and records the whole fracturing process, describes the formation rule of multi-stage fractures in detail.
[037] In the core 37 manufactured by the porous separator mold device 30, cracks can exist in one brittle medium or span different brittle media. The local brittleness characteristics, fracture morphology and interlayer can be changed by changing the size, shape, arrangement and mineral composition of the adhesive sheet, and the core size and shape can be changed by changing the size and shape of the mold.
[038] The radiation-type adhesive 22 uses butyl acrylate as a main raw material. As require, fluorescent materials and correspond mineral components are added to realize different functions. y-CT scanning device 38 uses OOCi radioactive isotope cobalt-60 as radioactive source. Under the y radiation emitted by the-CT scanning device 38, the radiation-type adhesive 22 changes the adhesive sheet from a flat plate to a cemented shape, cements the minerals released in the adhesive, or blowing the foaming agent in the adhesive with water to form cracks, simulating the formation of natural cracks or interlayers, and realizing natural cracks or inter layers with different characteristics while making cores.
[039] The radiant adhesive 22 may not be provided in the porous separator mold device 30. Each layer of the porous separator mold device 30 is in a horizontal position, and the mold is gently shaken after each layer is injected, so that each layer is horizontally added with another layer, and cores with different brittleness characteristics can be simply manufactured.
[040] The invention relates to an operation step of a device for simulating local fracturing core manufacturing and multi-stage fracture monitoring, which comprises the following steps:
Step 1: prepare the materials for core making as required, put the core materials into different core preparation raw material pools (4), start the raw material mixing unit (2), slowly open the flow control valve (5), and input the core raw materials into the mixing pool while stirring, and mix the mixed materials evenly. The flow of core material is controlled by pipeline and flow control device;
Step 2: input the required data into the monitoring system as the starting condition, and then start the pressure loading system (16) and the porous partition mold device (30). According to the test requirements, install the radiation adhesive (22) sheet into the porous plate, observe the mold installation, and after the device is closed, install the wedge-shaped rubber sealing plate (32), and determine the sealing effect. According to different local brittleness characteristics, the corresponding core material delivery pipeline (10) is connected with the corresponding hole on the flat plate, the input control valve (11) is opened, and the mixed raw material is continuously stirred, so that the core material is smoothly transported to the closed mold. When the core material is filled with the mold, the conveying control valve (11) is closed, and then the whole core material conveying system is closed;
Step 3: after the core material solidifies, open the mold and send the core along the slide to the core y-CT scanning device (38), scan the core, observe the cementation transformation of adhesive sheet, and close the y-CT scanning device (38) after the core cementation is completed;
Step 4: send the core (37) along the slide (24) into the core fracturing chamber (39), and fix the core (37); input relevant parameters into the fracturing monitoring system in advance, start the fracturing system, and pay attention to observation; and
Step 5: after the experiment, export and sort out the data, gently take out the tested core (37), clean the test device and equipment, and turn off the power supply.
[041] Working principle: Radiant adhesive sheet and y-CT scanning device are used when using the simulated local fracturing core fabrication and multi-stage fracture monitoring device. The radiation adhesive uses butyl acrylate as the main raw material and adding fluorescent materials to it so as to facilitate observation and recording on the display device. When cobalt 60 decays, it produces gamma rays. Under the action of gamma rays, butyl acrylate polymerize and produce polymer adhesives. The adhesive sheet used in the invention is prepared by mixing special substances into the butyl acrylate in a specific environment. It has the following characteristics: it reacts at normal temperature without heating. When the core is scanned by the y-CT scanning device, the radiation emitted by the y-CT scanning device converts the adhesive sheet into an adhesive, which has very close properties to the cementing substance that plays an adhesive role with rock particles in the formation, and can bind the released minerals to simulate the cementation conditions of underground rocks, natural interlayers and fracture conditions. According to the test requirements, the adhesive sheet can be made, in which different mineral components can be added to simulate the interlayer with different mineral components. At that same time, a foaming agent may be added to the adhesive sheet, simulating natural fractured cores. During the core manufacturing process, when radiation scanning is carried out on the core, the thin plate is converted into a colloidal body, and water enters the cracks of the thin plate and reflects with the foaming agent to form bubbles, thus continuous cracks along the adhesive thin plate can be manufactured with controllable direction and length. When making the adhesive sheet, attention should be paid to the proper amount of cement on the adhesive sheet, otherwise the interlayer or crack will be blocked and the test effect will be affected. According to the test requirements, the size and shape of the radiant adhesive sheet can be designed into any shape according to the test requirements, and different materials can be added according to the different functions to meet the requirements of various tests. y-CT scanning device uses OOCi radioactive isotope cobalt-60 as radioactive source. A y-CT scanning device is used in conjunction with a radiant adhesive sheet. Before fracturing, the finished core slides into the device along the slideway, and the y CT scanning device is started. At this time, the device emits y rays to transform the radiant adhesive sheet from a separator to an adhesive, which cements the released minerals and can form fractures with different characteristics while cementing the core. If you simply want to make cores with different brittleness characteristics, you can do not add adhesive sheets, just adjust the mold position, and try to make each layer in a horizontal position, and gently shake the mold after injecting each layer, so that each layer can be injected into another layer horizontally.
[042] Although the invention has been described with reference to specific examples, it will be appreciated by those skilled in the art that the invention may be embodied in many other forms, in keeping with the broad principles and the spirit of the invention described herein.
[043] The present invention and the described embodiments specifically include the best method known to the applicant of performing the invention. The present invention and the described preferred embodiments specifically include at least one feature that is industrially applicable
Claims (9)
1. A device for simulating local fracturing core making and multi-stage fracture
monitoring includes a material mixing system (1), a pressure loading system (16), a
core forming system (25), a fracturing system and a y-CT scanning device (38). It is
characterized in that the material mixing system (1) is connected with the porous
partition mold device (30) in the core forming system (25) through the material
conveying pipeline (12), and the pressure loading system (16) acts on the porous
partition mold device (30) in the core forming system (25) and the fracturing system,
respectively. The formed core (37) made in the core forming system (25) is sent to a 7
CT scanning device (38) via a slide (24);
The material mixing system (1) comprises a transmission system (3), a core
raw material making pool (4), a flow control valve (5), a raw material conveying
pipeline (6), a mixed material pool (7), a core material conveying pipeline (10) and a
conveying control valve (11). The core raw material making pool (4) transmits the core
raw material to the mixed material pool (7) through the raw material conveying pipeline
(6), and the flow control valve (5) is installed on the raw material conveying pipeline
(6), and an agitator (9) is arranged in the mixed material pool (7), and the agitator (9)
rotates through the transmission system (3), and the transmission system (3) includes
raw material mixing unit (2)and the driving rod (8). The raw material mixing unit (2) is
connected with the agitator (9) through the driving rod (8).
The pressure loading system (16) includes a gas transmission line (13), a gas
flow and pressure control valve (14), a pressure monitoring system (15), a gas storage
tank (17) and a pressure control unit (18). The gas output end of the storage tank (17) is connected with a gas transmission line (13), and one end of the gas transmission line
(13) is installed with a gas flow and pressure control valve (14), which is connected
with a pressure monitoring system (15), and the other end of the gas transmission
pipeline (13) is connected with a pressure control unit (18).
The core forming system (25) includes a pressure applying device (19), a
shock cushion (20) and a porous diaphragm mold device (30). One end of the pressure
applying device (19) is connected to the pressure loading system (16). The other end of
the pressure applying device (19) is pressed against the outer surface of the porous
diaphragm mold device (30) through a shock-absorbing pad (20).
The pressure applying device (19) includes a gas pipe (34), a connecting shaft
(35) and a gas-driven telescopic rod (36). One end of the gas pipe (34) is in connection
with a gas transmission pipeline (13). The other end of the pipe (34) is respectively
connected with the air drive telescopic rod (36), and a plurality of the air drive
telescopic rods (36) are connected by a connecting shaft (35).
The fracturing system includes a pressure plate (27), a fracturing device (28),
a fracture monitoring system (29) and a porous partition mold device (30). The
fracturing device (28) is internally provided with a porous partition mold device (30),
and the two sides of the porous partition mold device (30) are respectively clamped
with pressure plates (27), and the porous partition mold device (30) is connected with
a fracture monitoring system (29) The porous partition mold device (30) is connected
with another pressure loading system (16) through a gas conveying channel (26).
The porous partition mold device (30) is composed of transparent plexiglass
plate (21), radiation adhesive (22) and core material injection control hole (23). The
radiation adhesive (22) is filled on the inner cavity partition board of the porous
partition mold device (30). Core material injection control holes (23) are arranged on
both sides of the porous partition mold device (30) to connect with the material
conveying pipeline (12).
2. The device for simulating local fracturing core production and multi-stage
fracture monitoring according to claim 1 is characterized in that a transparent plexiglass
plate (21) is placed at the top of the porous partition mold device (30). The shape and
arrangement of the adhesive plate interlayer, the mineral composition in the adhesive
and the position of the material pipe connecting the plate in the porous partition mold
device (30) can be changed according to the actual production requirements, so as to
produce various rock cores with different local brittleness characteristics and cores with
different fracture characteristics or interlayer.
3. The invention relates to a device for simulating local fracturing core
production and multi-stage fracture monitoring according to claim 1 is characterized in
that the core forming system (25) and the porous partition mold device (30) in the
fracturing system are slidably disposed by being arranged on a slide (24) so as to
facilitate the moving of the porous partition mold device (30) in different positions.
4. The device for simulating local fracturing core production and multi-stage
fracture monitoring according to claim 1 is characterized in that wedge-shaped rubber
sealing plate (32) is clamped at four corners of the porous partition mold device (30), and the force application device (33) of the porous partition mold device (30) is installed in the slide way (31) of the force application device.
5. The device for simulating local fracturing core production and multi-stage
fracture monitoring according to claim 1 is characterized in that the fracturing system
is coupling the fracturing device (28) with the y-CT scanning device (38). The
fracturing device (28) carries out fracturing according to the pressure and data provided
by the pressure application system (16). The y - CT scanning device (38) transforms the
radiation adhesive (22) sheet from a flat plate to an adhesive, and the released minerals
are cemented. At the same time, core (37) cementation and fracture formation are
completed. The whole process of fracturing is monitored and recorded, and the
formation law of multi-stage fractures is described in detail.
6. The device for simulating local fracturing core production and multi-stage
fracture monitoring according to claim 1 is characterized in that the core (37) made by
the porous partition mold device (30) can exist in a brittle medium or cross different
brittle media; the size, shape, arrangement and mineral composition of the adhesive
sheet can be changed to change the local brittle characteristics, fracture morphology
and interlayer, and the size and shape of the core can be changed by changing the size
and shape of the mold.
7. The device for simulating local fracturing core production and multi-stage
fracture monitoring according to claim 6 is characterized in that the radiation type
adhesive (22) can realize different functions by adding fluorescent materials and
corresponding mineral components according to the needs. Under the y ray emitted by the y-CT scanning device (38), the radiation adhesive (22) transforms the adhesive sheet from the flat to the cemented. The mineral released from the binder is cemented, or the foaming agent in the binder foams with water to form fracture, which simulates the formation of natural fracture or interlayer, so as to realize the natural fracture or interlayer with different characteristics while making the core.
8. The device for simulating local fracturing core production and multi-stage
fracture monitoring according to claim 1 is characterized in that radiation adhesive (22)
can not arranged in the porous partition mold device (30), and each layer of the porous
partition mold device (30) is in a horizontal position. After each layer is injected, the
mold is gently vibrated to make each layer horizontally add another layer, so that cores
with different brittleness characteristics can be produced simply.
9. The utility model relates to an operation method for simulating local fracturing
core production and multi-stage fracture monitoring device, which is characterized in
that the operation method includes:
Step 1: prepare the materials for core making as required, put the core materials
into different core preparation raw material pools (4), start the raw material mixing unit
(2), slowly open the flow control valve (5), and input the core raw materials into the
mixing pool while stirring, and mix the mixed materials evenly. The flow of core
material is controlled by pipeline and flow control device;
Step 2: input the required data into the monitoring system as the starting
condition, and then start the pressure loading system (16) and the porous partition mold device (30). According to the test requirements, install the radiation adhesive (22) sheet into the porous plate, observe the mold installation, and after the device is closed, install the wedge-shaped rubber sealing plate (32), and determine the sealing effect. According to different local brittleness characteristics, the corresponding core material delivery pipeline (10) is connected with the corresponding hole on the flat plate, the input control valve (11) is opened, and the mixed raw material is continuously stirred, so that the core material is smoothly transported to the closed mold. When the core material is filled with the mold, the conveying control valve (11) is closed, and then the whole core material conveying system is closed;
Step 3: after the core material solidifies, open the mold and send the core along
the slide to the core y-CT scanning device (38), scan the core, observe the cementation
transformation of adhesive sheet, and close the y-CT scanning device (38) after the core
cementation is completed;
Step 4: send the core (37) along the slide (24) into the core fracturing chamber
(39), and fix the core (37); input relevant parameters into the fracturing monitoring
system in advance, start the fracturing system, and pay attention to observation;
Step 5: after the experiment, export and sort out the data, gently take out the tested core (37), clean the test device and equipment, and turn off the power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020101616A AU2020101616A4 (en) | 2020-08-02 | 2020-08-02 | A device for simulating local fracturing core making and multi-stage fracture monitoring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2020101616A AU2020101616A4 (en) | 2020-08-02 | 2020-08-02 | A device for simulating local fracturing core making and multi-stage fracture monitoring |
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| Publication Number | Publication Date |
|---|---|
| AU2020101616A4 true AU2020101616A4 (en) | 2020-09-17 |
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ID=72432485
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418788A (en) * | 2021-05-07 | 2021-09-21 | 宁波金晟芯影像技术有限公司 | Mobile camera lens pressure measuring device |
| CN115341886A (en) * | 2021-05-14 | 2022-11-15 | 中国石油化工股份有限公司 | Composite rock stratum fracturing simulation method and device |
-
2020
- 2020-08-02 AU AU2020101616A patent/AU2020101616A4/en not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113418788A (en) * | 2021-05-07 | 2021-09-21 | 宁波金晟芯影像技术有限公司 | Mobile camera lens pressure measuring device |
| CN113418788B (en) * | 2021-05-07 | 2022-12-27 | 宁波金晟芯影像技术有限公司 | Mobile camera lens pressure measuring device |
| CN115341886A (en) * | 2021-05-14 | 2022-11-15 | 中国石油化工股份有限公司 | Composite rock stratum fracturing simulation method and device |
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