CN114778308A - Visual simulation method and tool for migration of fracturing propping agent of true triaxial horizontal well - Google Patents
Visual simulation method and tool for migration of fracturing propping agent of true triaxial horizontal well Download PDFInfo
- Publication number
- CN114778308A CN114778308A CN202210352979.3A CN202210352979A CN114778308A CN 114778308 A CN114778308 A CN 114778308A CN 202210352979 A CN202210352979 A CN 202210352979A CN 114778308 A CN114778308 A CN 114778308A
- Authority
- CN
- China
- Prior art keywords
- fracturing
- blind hole
- migration
- fracture
- stress
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a visual simulation method and tool for migration of a fracturing propping agent of a true triaxial horizontal well. The method comprises the following steps: 1) cutting an organic glass block, and grinding and mirror polishing the surface of the organic glass block to obtain a transparent sample; 2) drilling a blind hole on the transparent sample, putting a casing into the blind hole, and solidifying an annulus between the casing and the blind hole by using a well cementation glue; 3) performing slotting treatment inside the sleeve; 4) loading the hydraulic fracturing physical simulation system with a pressurizing plate, loading true triaxial stress through the pressurizing plate, and injecting sand-carrying liquid into the blind hole for fracturing; 5) and shooting the fracturing process through an explosion-proof glass window and a transparent sample of the pressurizing plate by using high-speed camera equipment, and observing the conditions of fracture expansion and proppant migration under the simulated formation stress condition in real time. The method can synchronously simulate the fracture initiation, expansion and proppant migration processes under the condition of formation stress, and furthest simulate the proppant migration condition in field fracturing.
Description
Technical Field
The invention belongs to the technical field of hydraulic fracturing indoor physical simulation tests, and particularly relates to a visual simulation method and tool for migration of a fracturing propping agent of a true triaxial horizontal well.
Background
The horizontal well technology is combined with the multi-section multi-cluster fracturing technology to realize the economic development of unconventional oil and gas. In hydraulic fracturing, a ground high-pressure pump set is used for transmitting pressure to a reservoir through fracturing fluid, and when the pressure in a shaft rises to the fracture pressure of the reservoir, the reservoir can form cracks. The fracture will continue to propagate in length and width as well as in height as the injection of fracturing fluid continues. After the fracture is formed, a sand-carrying fluid mixed with a proppant is injected into the fracture. After the pump is stopped, the fracture cannot be completely closed under the action of the propping agent, so that an oil-gas flowing high-speed channel with certain flow conductivity is formed. Migration and distribution rules of the proppant in the fracture are important factors influencing the fracture conductivity. Since the placement of proppant cannot be directly observed in the formation, laboratory experiments have become the primary means of studying proppant transport and distribution.
At present, the experimental method for studying the migration and distribution rule of the proppant mainly uses a transparent flat plate gap or a resin material reverse mold to simulate a hydraulic fracture, and sand-carrying liquid is injected into the simulated fracture to simulate the migration and distribution of the proppant in the fracture, such as the experimental methods and equipment disclosed in application numbers CN113338920A and CN 202110289578.3.
However, the above method has certain problems. Firstly, the fracture is a flat plate, and the shape, roughness and other parameters of the real fracture in the stratum cannot be really reduced. Secondly, the fracture is preset, the sand carrying liquid is only used for carrying sand without a fracture forming function, and fracture expansion and proppant migration cannot be simulated synchronously. And thirdly, the stress of the crack is in a uniaxial stress state, and the stress state is greatly different from the stress state of the real stratum. And therefore have greater limitations.
Disclosure of Invention
The invention aims to provide a method and a tool for visually simulating migration of a fracturing propping agent of a true triaxial horizontal well, which consider simulating a real formation stress condition, fracture initiation and expansion, multi-cluster fracture stress interference, fracture surface roughness, construction displacement, a real-time migration process of the propping agent in a fracture under the influence of a fracturing fluid type and viscosity, and finally visually observing and recording a laying state, so that the consistency of a simulation experiment and the migration mechanism of the propping agent in the real fracture is ensured.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a visual simulation method for migration of fracturing propping agent of a true triaxial horizontal well comprises the following steps:
1) cutting the organic glass block, and polishing and mirror polishing the surface of the organic glass block to obtain a transparent sample for simulating a stratum;
2) drilling a blind hole for simulating a shaft on the transparent sample obtained in the step 1), placing a casing in the blind hole, and solidifying an annulus between the casing and the blind hole by using a well cementation glue to simulate well cementation;
3) performing slotting treatment in the casing after consolidation in the step 2) to simulate the actual shaft perforation process;
4) loading the transparent sample treated in the step 3) into a hydraulic fracturing physical simulation system equipped with a pressurizing plate, loading true triaxial stress through the pressurizing plate, and injecting a sand-carrying fluid into the blind hole for fracturing to simulate a fracturing process under a formation stress condition; the sand carrying fluid is a fracturing fluid mixed with a propping agent;
5) and shooting the fracturing process through the explosion-proof glass window of the pressurizing plate and the transparent sample by using high-speed camera equipment, and observing the fracture expansion and proppant migration conditions under the simulated formation stress condition in real time.
In the method, in the step 1), the organic glass is made of polymethyl methacrylate.
The cutting shape and size of the organic glass block are determined according to a rock sample loading chamber of the hydraulic fracturing physical simulation system, and the size suitable for the cavity is selected.
The polished surface should have good light transmission, allowing the interior of the sample to be clearly observed from the surface.
And integrally cutting and forming the organic glass block to simulate a homogeneous stratum, or cutting the organic glass block in layers and then bonding and forming to simulate a layered stratum.
In the step 2), the direction of drilling the blind hole is perpendicular to the direction of loading the maximum horizontal main stress.
The size of the blind hole is determined according to the sizes of the transparent sample and the sleeve;
the sleeve is a rigid polyvinyl chloride pipe or a steel pipe;
the well cementation glue is epoxy resin glue.
In the consolidation step, the well cementation glue is added between the sleeve and the blind hole annulus, and the well cementation glue is dripped into the bottom of the well to prevent the bottom of the well from forming cracks.
In the step 3), the distance and the number of the slots are determined according to the site construction condition and the similar criterion.
In the step 4), the fracturing process comprises multi-fracture initiation, expansion and proppant migration, and multi-fracture stress interference, flow distribution of clusters, fracture surface roughness and near-well tortuosity can be considered.
In the fracturing process, fracturing is carried out according to the sequence of adding the pad fluid and then adding the sand carrying fluid, or directly adding the sand carrying fluid for fracturing;
the fracturing fluid is a medium for transmitting pressure, and the proppant is a substance for propping fractures. The proppant concentration and size and material are determined based on field conditions and similar criteria.
The fracturing fluid is one of slickwater, clear water and guar gum.
The displacement of the fracturing fluid may be determined based on field displacement and similar criteria.
In the step 5), at least embedding the explosion-proof glass window in a pressurizing plate opposite to the blind hole;
the interior of the rock sample loading chamber of the fracturing system can be clearly observed through the explosion-proof glass window.
Step 5), observing the distribution condition of the proppant in the fracture in real time;
the high-speed camera equipment is connected to the display equipment and the computer, and videos shot by the high-speed camera equipment can be displayed in the display equipment in real time and can be played back after fracturing is finished.
The true triaxial horizontal well fracturing proppant migration visualization tool capable of realizing the method is also within the protection scope of the invention.
The technical scheme of the invention has the following beneficial effects:
one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. the process of fracture initiation, propagation and proppant migration under the condition of formation stress can be synchronously simulated, and the migration condition of the proppant in field fracturing can be simulated to the maximum extent;
2. the influence of stress interference on proppant migration under different cluster spacing conditions can be researched through the spacing of the perforation clusters;
3. by changing the discharge capacity of the pump, the influence of different construction discharge capacities on an experimental result can be researched;
4. the crack width is controlled by changing the magnitude of the three-way loading pressure, so that the influence of different stresses on an experimental result can be researched;
5. fractures were fracture formed in the experiment, so the effect of near-well fracture tortuosity on proppant transport can be considered.
6. In the experiment, a pressure plate embedded with an explosion-proof glass window and a transparent fracturing sample are adopted, and high-speed camera equipment can be used for displaying and recording the fracturing process in real time, so that the whole research process is visual.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a flow chart of a visualization simulation experiment method for migration of a fracturing proppant of a true triaxial horizontal well, which is provided by the embodiment of the present application.
Fig. 2 is a structural schematic diagram of a visual simulation experiment tool for migration of a fracturing proppant of a true triaxial horizontal well in the embodiment of the present application. Each label is as follows: 1-transparent sample; 2, blind holes; 3-sleeving a pipe; 4-slot position; 401. 402, 403-annular groove; 5-cracking; 6-a proppant; 7-high speed camera equipment; 8-a compression plate with an explosion-proof observation window; 801-explosion-proof observation window; a compression plate opposite the 802 blind hole; 9-a compression plate; 901-vertical stress direction pressurizing plate; 902-maximum horizontal principal stress direction compression plate; 903-a minimum horizontal principal stress direction pressing plate; 10-display device and computer.
Fig. 3 is a schematic diagram of an organic glass transparent fracturing sample in the embodiment of the application.
Fig. 4 is a schematic view of a pressing plate with an explosion-proof window in the embodiment of the present application. Each marker is as follows: 801-compression plate, 802-explosion-proof window.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in other sequences than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a flow chart of a true triaxial horizontal well fracturing proppant migration visualization simulation experiment method provided by an embodiment of the invention. FIG. 2 is a schematic diagram of the structure of the experimental tool, and the following numbers refer to the numbers of the components in FIG. 1. The simulation experiment was carried out according to the flow chart shown in fig. 1, and the specific steps were as follows:
s201: cutting and polishing an organic glass block (polymethyl methacrylate) into a sample with a smooth surface and a size suitable for a rock sample loading chamber of a hydraulic fracturing simulation system. Specifically, the organic glass can be integrally cut and formed or can be formed by bonding after being cut in a layered mode, and the homogeneous stratum and the layered stratum can be simulated under the two conditions respectively.
The size of the organic glass sample can be determined according to the size of the cavity of the true triaxial fracturing physical simulation device and the thickness of the layered stratum to be simulated, and the size is not limited.
S202: the surface of the sample was mirror-polished to form a transparent sample 1.
Specifically, the polishing wheel may be used for polishing by being dipped in an abrasive paste or may be used for polishing by using a high-mesh-number abrasive paper, for example, by polishing the entire machine, and then, the local part may be polished manually by using the abrasive paper, and the inside of the sample can be clearly observed from the surface after polishing.
S203: the drilling direction of the blind hole is determined on the transparent sample 1 and the blind hole 2 is drilled.
Specifically, a blind hole 2 is drilled on one of the faces with a drill to a certain depth and diameter. Because the migration condition of the propping agent in the fractured fractures of the horizontal well is researched, the direction of the well bore is generally in the same direction with the horizontal minimum principal stress (namely perpendicular to the direction of loading the maximum horizontal principal stress) according to the actual situation in the field. And determining the drilling depth of the blind hole 2 according to the length of the experimental shaft.
S204: the sleeve 3 is lowered into the blind hole.
Specifically, the casing 3 is a rigid polyvinyl chloride pipe or a steel pipe, the length of the casing 3 is the same as the depth of a borehole, and the diameter of the casing 3 is smaller than that of the blind hole.
S205: the annulus between the casing 3 and the blind hole 2 is cemented with glue to simulate cementing.
Specifically, a dummy casing 3 is lowered into the drilled blind hole 2, and an annular space between the dummy casing and the rock sample is completely filled with a well cement paste, which is dropped at the bottom of the well to prevent cracks from being formed at the bottom of the well. Standing for a preset time to completely solidify the well cementation glue, wherein the well cementation glue can be epoxy resin glue, and the preset time can be set according to experience data.
S206: and after the annular glue is solidified, performing slotting treatment inside the sleeve to form the transparent fracturing sample.
Specifically, a cutting tool is run into the simulated casing 3 and annular grooves 401, 402, 403 having a certain depth (diameter) and width, respectively, are cut at a specific depth position. Optional slot positions and the number of slots are set according to perforation intervals required to be simulated by an experimental scheme, and if the inner wall of the simulated casing is rough in the cutting process, the inner wall can be properly polished.
S207: the prepared transparent fracturing sample (figure 3) is put into a hydraulic fracturing physical simulation system, and sand-carrying fluid (fracturing fluid mixed with proppant) is injected for fracturing.
Specifically, the transparent fracturing sample 1 prepared by the steps is loaded into a core loading chamber of a true triaxial hydraulic fracturing physical simulation system, three-way stress is provided by a hydraulic station 11, and the stress is transmitted to three main stress directions of the transparent fracturing sample through pressurizing plates 901, 902 and 903 connected with hydraulic plungers 11 respectively. In horizontal well fracturing, the stress loading direction is shown in FIG. 1, where σVIs a vertical stress, σHIs the maximum horizontal principal stress, σhIs the minimum level principal stress. The stress magnitude is determined from the actual formation stress. The fracturing fluid injection pump is turned on and when the pressure in the wellbore is greater than the formation fracture pressure, a fracture 5 is formed. Continuously pumping the sand-carrying liquid into the crackAnd expands while the proppant 6 enters the fracture and migrates with the fracturing fluid in the fracture 5. And after fracturing is finished, stopping the pump.
S208: the fracturing process is shot by a high-speed camera through an explosion-proof glass window and a transparent fracturing sample on the pressurizing plate, the process of synchronously generating fracture expansion and proppant migration under the condition of simulating real formation stress is observed in real time, and the process is stored and displayed by a computer and a display.
Specifically, the high-speed imaging device 7 is aligned with an observation window 8 of the rock sample loading chamber, which is embedded in the middle of the back pressure plate (fig. 4) to obtain an optimal observation angle, is made of explosion-proof glass, can withstand high pressure, and has good light transmittance. Adjusting the relative distance between the camera and the window to enable the camera to clearly shoot the inside of the sample, connecting the camera 7 to the display device and the computer 10, and starting the camera to capture the expansion process of the crack and the distribution condition of the propping agent in the crack at different moments during fracturing. The shot video can be displayed in the display device in real time, and meanwhile, the playback after the fracturing is finished is supported.
The present invention will be further described with reference to the following examples, but the present invention is not limited to the following examples.
The experimental methods used in the following examples are all conventional methods unless otherwise specified; the materials, reagents and the like used are commercially available unless otherwise specified.
Example 1
Carrying out visual simulation of proppant migration on a stratum of a certain block of a bull plot, wherein the field conditions are as follows: the lithology of the stratum is compact sandstone, and the stratum in the well section of the target layer can be regarded as a homogeneous stratum, so that the simulation can be carried out by organic glass. The formation stresses are respectively: vertical stress sigmaV30Mpa, maximum horizontal principal stress σH25MPa, minimum level principal stress sigmahThe same stress parameters were used for the experiments at 18 MPa. The fracturing fluid used in the simulation experiment is the same as the fracturing fluid on site, is guanidine gum fracturing fluid, has the viscosity of 100mPa & s, has the size and the concentration of the propping agent similar to those on site, and is 70/140-mesh quartz sand.
The hydraulic fracturing physical simulation system is disclosed in 'influence of CO _ 2-water-rock action on compact sandstone property and crack propagation' by Lisihai et al.
The simulation experiment is carried out according to the method, and the specific parameters are set as follows:
s201: the organic glass block (polymethyl methacrylate) is integrally cut and polished into a sample which is suitable for the size of a rock sample loading chamber of a hydraulic fracturing simulation system and has a smooth surface, wherein the size of the sample is 8cm multiplied by 10cm, and the size of a cavity of the true triaxial fracturing physical simulation device is 8cm multiplied by 10 cm.
S202: the surface of the sample is integrally ground through a machine, and then the local part of the sample is ground and polished manually by using sand paper to form a transparent sample 1.
S203: and determining the drilling direction of the blind hole on the transparent sample by using a drilling machine and drilling the blind hole 2, wherein the direction of the shaft is the same as the horizontal minimum principal stress, the crack is initiated vertical to the shaft, the simulation is that the horizontal well is drilled, and the depth of the blind hole 2 is 6.0cm and the diameter is 1.5 cm.
S204: and (3) setting a casing 3 in the blind hole, wherein the casing 3 is a steel pipe, the length of the casing 3 is the same as the depth of the borehole, and the diameter of the casing 3 is 1.3 cm.
S205: and (3) solidifying an annular space between the sleeve 3 and the blind hole 2 by using epoxy resin glue to simulate well cementation, wherein the well cementation time is 12 hours.
S206: and after the annular glue is solidified, performing slotting treatment inside the sleeve, wherein the number of the slotting is 1, and the slotting position 4 is the position of the blind hole root with naked eyes, so as to form a transparent fracturing sample.
S207: the prepared transparent fracturing sample is loaded into a hydraulic fracturing physical simulation system, a hydraulic station is used for providing three-way stress, the stress is transmitted to three main stress directions of the transparent fracturing sample through pressure plates 901, 902 and 903 which are connected with hydraulic plungers 11 respectively, and the three-way stress is respectively as follows: sigmaV＝30Mpa，σH＝25MPa，σh18 MPa; the fracturing fluid injection pump is turned on and after the pressure in the wellbore is greater than the formation fracture pressure, a fracture 5 is formed. Pumping the sand-carrying fluid continuously, expanding the fracture, simultaneously leading the propping agent 6 to enter the fracture and along with the fracturing fluid in the fractureAnd 5, migration. And after fracturing is finished, stopping the pump. The fracturing fluid is guanidine gum fracturing fluid, the discharge capacity of the fracturing fluid is 5ml/min, the viscosity is 100mPa & s, the propping agent is 70/140-mesh quartz sand, and the concentration of the propping agent is 16g/100 ml.
S208: the fracturing process is photographed through an explosion-proof glass window and a transparent fracturing sample on a pressurizing plate by using a high-speed camera device, wherein the high-speed camera device 7 is aligned to an observation window 801 of a rock sample loading chamber, the observation window is embedded in the middle 802 of the pressurizing plate opposite to a blind hole, the process of synchronously generating crack propagation and proppant migration under the condition of simulating real formation stress is observed in real time, and the process is stored and displayed by using a computer and a display 10.
The results show that the crack 5 is initiated from the open hole section, a transverse cutting seam along the horizontal maximum main stress expansion is formed, and the local tortuosity exists. The average width of the fracture is 624 mu m, the fracture pressure of the test sample is 20.5MPa, the distribution concentration of the proppant 6 in the fracture is gradually reduced from a shaft to the edge of the test sample, and the proppant is seriously accumulated at the tortuous part of the fracture.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A visual simulation method for migration of fracturing propping agent of a true triaxial horizontal well comprises the following steps:
1) cutting the organic glass block, and polishing and mirror polishing the surface of the organic glass block to obtain a transparent sample for simulating a stratum;
2) drilling a blind hole for simulating a shaft on the transparent sample obtained in the step 1), putting a casing into the blind hole, and solidifying an annulus between the casing and the blind hole by using a well cementation glue to simulate well cementation;
3) performing slotting treatment in the casing after consolidation in the step 2) to simulate the actual shaft perforation process;
4) loading the transparent sample treated in the step 3) into a hydraulic fracturing physical simulation system provided with a pressurizing plate, loading true triaxial stress through the pressurizing plate, and injecting a sand-carrying liquid into the blind hole for fracturing to simulate a fracturing process under a stratum stress condition; the sand-carrying fluid is fracturing fluid mixed with proppant;
5) and shooting the fracturing process through the explosion-proof glass window of the pressurizing plate and the transparent sample by using high-speed camera equipment, and observing the fracture expansion and proppant migration conditions under the simulated formation stress condition in real time.
2. The method of claim 1, wherein: in the step 1), the organic glass is made of polymethyl methacrylate.
3. The method according to claim 1 or 2, characterized in that: in the step 1), the organic glass block is integrally cut and formed to simulate a homogeneous stratum, or the organic glass block is cut in layers and then bonded and formed to simulate a layered stratum.
4. The method according to any one of claims 1-3, wherein: in the step 2), the direction of drilling the blind hole is perpendicular to the direction of loading the maximum horizontal main stress.
5. The method according to any one of claims 1-4, wherein: in the step 2), the sleeve is a rigid polyvinyl chloride pipe or a steel pipe;
the well cementation glue is epoxy resin glue.
6. The method according to any one of claims 1-5, wherein: in the step 2), in the consolidation step, the well cementation glue is added between the sleeve and the blind hole annulus, and the well cementation glue is dripped into the well bottom to prevent a crack from being formed at the well bottom.
7. The method according to any one of claims 1-6, wherein: in the step 4), the fracturing process is carried out according to the sequence of adding the pad fluid and then adding the sand-carrying fluid, or the sand-carrying fluid is directly added for fracturing;
the fracturing fluid is one of slickwater, clear water and guar gum.
8. The method according to any one of claims 1-7, wherein: and 5) embedding the explosion-proof glass window in at least a pressurizing plate opposite to the blind hole.
9. The method according to any one of claims 1-8, wherein: step 5), observing the distribution condition of the propping agent in the fracture in real time;
the high-speed camera equipment is connected to the display equipment and the computer, and videos shot by the high-speed camera equipment can be displayed in the display equipment in real time and can be played back after fracturing is finished.
10. The utility model provides a visual instrument of true triaxial horizontal well fracturing proppant migration which characterized in that: the tool is capable of carrying out the method of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210352979.3A CN114778308A (en) | 2022-04-02 | 2022-04-02 | Visual simulation method and tool for migration of fracturing propping agent of true triaxial horizontal well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210352979.3A CN114778308A (en) | 2022-04-02 | 2022-04-02 | Visual simulation method and tool for migration of fracturing propping agent of true triaxial horizontal well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114778308A true CN114778308A (en) | 2022-07-22 |
Family
ID=82426550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210352979.3A Pending CN114778308A (en) | 2022-04-02 | 2022-04-02 | Visual simulation method and tool for migration of fracturing propping agent of true triaxial horizontal well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114778308A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115639083A (en) * | 2022-12-06 | 2023-01-24 | 新疆斐德莱布能源科技有限公司 | True triaxial hydraulic fracturing simulation experiment method and device for mine field level |
| CN116181301A (en) * | 2023-03-08 | 2023-05-30 | 中国石油大学(北京) | Simulation method and simulation system for fracturing multi-joint interference of three-dimensional well pattern of horizontal well |
| CN117489317A (en) * | 2023-12-29 | 2024-02-02 | 克拉玛依市白碱滩区(克拉玛依高新区)石油工程现场(中试)实验室 | Mining site-level carbon dioxide fracturing fluid simulation experiment device and method |
-
2022
- 2022-04-02 CN CN202210352979.3A patent/CN114778308A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115639083A (en) * | 2022-12-06 | 2023-01-24 | 新疆斐德莱布能源科技有限公司 | True triaxial hydraulic fracturing simulation experiment method and device for mine field level |
| CN116181301A (en) * | 2023-03-08 | 2023-05-30 | 中国石油大学(北京) | Simulation method and simulation system for fracturing multi-joint interference of three-dimensional well pattern of horizontal well |
| CN116181301B (en) * | 2023-03-08 | 2023-09-19 | 中国石油大学(北京) | Simulation method and simulation system for fracturing multi-joint interference of three-dimensional well pattern of horizontal well |
| CN117489317A (en) * | 2023-12-29 | 2024-02-02 | 克拉玛依市白碱滩区(克拉玛依高新区)石油工程现场(中试)实验室 | Mining site-level carbon dioxide fracturing fluid simulation experiment device and method |
| CN117489317B (en) * | 2023-12-29 | 2024-03-22 | 克拉玛依市白碱滩区(克拉玛依高新区)石油工程现场(中试)实验室 | Mining site-level carbon dioxide fracturing fluid simulation experiment device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114778308A (en) | Visual simulation method and tool for migration of fracturing propping agent of true triaxial horizontal well | |
| Hou et al. | Fracture initiation and propagation in a deep shale gas reservoir subject to an alternating-fluid-injection hydraulic-fracturing treatment | |
| CN106124325B (en) | Rock fracture simulates sample and preparation method, the simulation test device and method | |
| CN108756841B (en) | Shale repeated fracturing treatment method | |
| CN108590601B (en) | Experimental method for optimizing water injection expansion construction parameters | |
| CN105334090B (en) | A kind of preparation method of the group of payzone containing coal pressure break object mould sample | |
| Younessi et al. | Sand production simulation under true-triaxial stress conditions | |
| Bale et al. | Stimulation of carbonates combining acid fracturing with proppant (CAPF): A Revolutionary Approach for Enhancement of Sustained Fracture Conductivity and Effective Fracture Half-length | |
| CN106198181B (en) | A kind of fractured horizontal well physical analogy sample and preparation method thereof | |
| Gou et al. | Effect of different types of stimulation fluids on fracture propagation behavior in naturally fractured carbonate rock through CT scan | |
| CN105675399A (en) | Laboratory staged hydraulic fracturing test method for large-size natural rock | |
| Fallahzadeh et al. | The impacts of fracturing fluid viscosity and injection rate on the near wellbore hydraulic fracture propagation in cased perforated wellbores | |
| Wang et al. | Cement sheath integrity during hydraulic fracturing: An integrated modeling approach | |
| CN106121640B (en) | The rock sample processing method and device of tilted stratum true triaxial pressure break physical simulation experiment | |
| CN109989737B (en) | Method for realizing self-supporting fracture of rock | |
| CA3062854A1 (en) | Method for predicting of hydraulic fracturing and associated risks | |
| CN114575819A (en) | Visual simulation method and device for migration of fracturing propping agent of true triaxial three-dimensional well pattern | |
| CN112096359B (en) | Pitching temporary blocking steering fracturing test device, system and manufacturing method | |
| Surjaatmadja | Multioriented fracturing in unconventional reservoirs offers improved production by better connectivity | |
| Xu et al. | Simulation of fracture propagation law in fractured shale gas reservoirs under temporary plugging and diversion fracturing | |
| Frash et al. | True-triaxial hydraulic fracturing of Niobrara carbonate rock as an analogue for complex oil and gas reservoir stimulation | |
| Palencia Yrausquin et al. | Experimental study on sand control in unconsolidated sandstones by chemical injection and hydraulic fracturing | |
| Wu et al. | Observations of hydraulic fracture initiation and propagation in a brittle polymer | |
| CN113738351B (en) | Manufacturing method and experimental method of fracture reservoir physical model | |
| CN115032368A (en) | Fracturing fracture self-supporting flow conductivity overall-process evaluation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |