Wedge extrusion stratum structure deformation physical simulation experiment device and experiment method

Abstract

The embodiment of the invention discloses a physical simulation experiment device and method for deformation of a wedge-shaped extrusion stratum structure. The device comprises a fan-shaped wedge block, a dovetail groove guide rail, a convex block roller, a fixed baffle plate and a U-shaped experiment groove, wherein the fan-shaped wedge block is fixedly connected with the plane side of the first dovetail groove guide rail, and the top end of the fan-shaped wedge block is fixed on the U-shaped experiment groove; the fixed baffle plate is provided with a second dovetail groove guide rail which is as long as the first dovetail groove guide rail, and the fixed baffle plate is fixed on the U-shaped experiment groove; the dovetail groove guide rails comprise a first dovetail groove guide rail and a second dovetail groove guide rail; and the bump roller is provided with a bump corresponding to the dovetail groove guide rail and an external power push rod, and is arranged between the first dovetail groove guide rail and the second dovetail groove guide rail. By adopting the scheme, external force is applied to push the fan-shaped wedge-shaped block to perform wedge-shaped extrusion on the simulated stratum, so that the stratum is deformed, and the deformation process and the deformation state of the wedge-shaped extrusion stratum structure are analyzed.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of oil and gas exploration structure analysis and simulation, and in particular to a wedge-shaped extrusion stratum structure deformation physical simulation experimental device and experimental method. Background Art

[0002] At present, most of the physical model experiments on stratigraphic structural deformation are completed under the background of unidirectional horizontal coaxial uniform compression. However, the actual stratigraphic compression structural deformation includes coaxial horizontal compression deformation, non-coaxial horizontal shear compression deformation and oblique compression deformation, and the structural deformation styles include anterior (posterior) oblique folds, thrust fault belts, thrust-fold belts and strike-slip thrust belts.

[0003] Wedge compression is a kind of oblique compression, such as compression between continental plates, oblique intrusive compression of volcanic intrusive rock bodies, wedge-shaped oblique thrust compression of orogenic belts, lateral compression of shear wedge blocks, etc. Therefore, wedge compression and deformation structural style are very common geological phenomena. However, the external stress applied by existing physical model experimental devices is mostly coaxial horizontal uniform compression, which cannot realize the physical simulation experiment of wedge compression structural deformation. Summary of the invention

[0004] The embodiment of the present invention provides a wedge-shaped squeezing stratum structure deformation physical simulation experimental device and an experimental method, so as to analyze the deformation process and deformation state of the wedge-shaped squeezing stratum structure through the constructed wedge-shaped squeezing stratum structure deformation physical simulation experimental device.

[0005] In a first aspect, an embodiment of the present invention provides a wedge-shaped extrusion stratum structural deformation physical simulation experimental device, the device comprising: a fan-shaped wedge block, a dovetail groove guide rail, a convex roller, a fixed baffle and a U-shaped experimental groove; wherein,

[0006] The fan-shaped wedge block is fixedly connected to the plane side of the first dovetail groove guide rail, and the top end of the fan-shaped wedge block is fixed to the U-shaped test groove; wherein the fan-shaped wedge block and the first dovetail groove guide rail are both provided with corresponding bolt holes;

[0007] The fixed baffle is provided with a second dovetail groove guide rail having the same length as the first dovetail groove guide rail, and the fixed baffle is fixed on the U-shaped experimental groove; the dovetail groove guide rail includes a first dovetail groove guide rail and a second dovetail groove guide rail;

[0008] The lug roller is provided with a lug corresponding to the dovetail groove guide rail and an external power push rod, and is installed between the first dovetail groove guide rail and the second dovetail groove guide rail; the external power push rod is used to apply thrust to the fan-shaped wedge block.

[0009] In a second aspect, an embodiment of the present invention further provides a physical simulation experimental method for wedge-shaped squeeze stratum structural deformation, the method comprising:

[0010] Determine the stratum material, stratum number and target extrusion deformation of the simulation experiment;

[0011] Determine the target fan-shaped wedge block according to the target extrusion deformation amount, and construct a wedge-shaped extrusion stratum structural deformation physical simulation experimental device; wherein the wedge-shaped extrusion stratum structural deformation physical simulation experimental device is integrated with a scanning device;

[0012] The extrusion deformation speed and the extrusion deformation duration are set, and an external force is applied to the external power push rod to make the convex block roller move from the top of the fan-shaped wedge block toward the fan-shaped surface end, so as to apply extrusion force to the simulated formation.

[0013] The embodiment of the present invention provides a physical simulation experimental device and experimental method for wedge-shaped compression stratum structural deformation, the device comprising: a fan-shaped wedge block, a dovetail groove guide rail, a protrusion roller, a fixed baffle and a U-shaped experimental groove; wherein the fan-shaped wedge block is fixedly connected to the plane side of the first dovetail groove guide rail, and the top of the fan-shaped wedge block is fixed on the U-shaped experimental groove; wherein the fan-shaped wedge block and the first dovetail groove guide rail are both provided with corresponding bolt holes; the fixed baffle is provided with a second dovetail groove guide rail of the same length as the first dovetail groove guide rail, and the fixed baffle is fixed on the U-shaped experimental groove; the dovetail groove guide rail comprises a first dovetail groove guide rail and a second dovetail groove guide rail; the protrusion roller is provided with a protrusion corresponding to the dovetail groove guide rail and an external power push rod, and is installed between the first dovetail groove guide rail and the second dovetail groove guide rail; the external power push rod is used to apply thrust to the fan-shaped wedge block. By adopting the technical solution of the embodiment of the present invention, a combined structural component of a fan-shaped wedge block, a dovetail groove guide rail and a convex roller is creatively designed. By applying an external thrust, the fan-shaped wedge block is pushed to wedge-extrude the simulated formation to cause structural deformation of the formation, so as to study and analyze the structural deformation process and deformation state of the wedge-extrusion formation, obtain the structural deformation pattern of the salt layer system stratum wedge-extrusion, and guide the sub-salt oil and gas exploration of the salt-bearing strata. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present invention. Also, the same reference symbols are used throughout the drawings to represent the same parts. In the drawings:

[0015] Figure 1 It is a structural schematic diagram of a wedge-shaped compression stratum structural deformation physical simulation experimental device provided in an embodiment of the present invention;

[0016] Figure 2 It is a schematic diagram of a front plan view of a physical simulation experimental device for wedge-shaped compression stratum structural deformation provided in an embodiment of the present invention;

[0017] Figure 3 It is a front side structural schematic diagram of a wedge-shaped compression stratum structural deformation physical simulation experimental device provided in an embodiment of the present invention;

[0018] Figure 4 It is a front side structural schematic diagram of another wedge-shaped compression stratum structural deformation physical simulation experimental device provided in an embodiment of the present invention;

[0019] Figure 5 It is a schematic flow chart of a physical simulation experimental method for wedge-shaped compression stratum structural deformation provided in an embodiment of the present invention;

[0020] Figure 6 It is a schematic diagram of the initial state structure of a wedge-shaped compression stratum structural deformation physical simulation experiment provided in an embodiment of the present invention;

[0021] Figure 7 It is a schematic diagram of the state structure after the extrusion is completed in a wedge-shaped extrusion stratum structural deformation physical simulation experiment provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0023] Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations (or steps) as sequential processes, many of the operations (or steps) therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0024] Among them, the acquisition, storage, use and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations.

[0025] Figure 1 Schematic diagram of a physical simulation experimental device for wedge-shaped extrusion stratum structure deformation provided in an embodiment of the present invention. This embodiment is applicable to the case of physical simulation of extrusion deformation of wedge-shaped extrusion stratum structure. Figure 1As shown, the wedge-shaped extrusion stratum structural deformation physical simulation experimental device provided in the embodiment of the present invention may include: a fan-shaped wedge block, a dovetail groove guide rail, a convex roller, a fixed baffle and a U-shaped experimental groove; wherein,

[0026] The fan-shaped wedge block ① is fixedly connected to the plane side of the first dovetail groove guide rail, and the top end of the fan-shaped wedge block is fixed to the U-shaped experimental groove ⑤; wherein the fan-shaped wedge block and the first dovetail groove guide rail are both provided with corresponding bolt holes;

[0027] The fixed baffle ④ is provided with a second dovetail groove guide rail having the same length as the first dovetail groove guide rail, and the fixed baffle is fixed on the U-shaped experimental groove; the dovetail groove guide rail ② includes the first dovetail groove guide rail and the second dovetail groove guide rail;

[0028] The lug roller ③ is provided with a lug corresponding to the dovetail groove guide rail and an external power push rod, and is installed between the first dovetail groove guide rail and the second dovetail groove guide rail; the external power push rod is used to apply thrust to the fan-shaped wedge block.

[0029] Optionally, the U-shaped experimental tank is provided with stratum materials simulating strata, and marker layers of different colors are used to separate the simulated strata. Figure 2 As shown, the U-shaped experimental tank ⑤ is a U-shaped physical model experimental tank with an open side. The specifications of the U-shaped experimental tank are length × width × height = 90cm × 30cm × 12cm, and the internal specifications of the simulated stratum experimental tank are length × width × height = 60cm × 30cm × 12cm. 3 to 5 layers of experimental simulated stratum materials are loaded into the U-shaped experimental tank (the number of strata can be increased according to experimental requirements), and the thickness of each simulated stratum layer can be set to 0.5 to 1.5 cm according to the similarity ratio of the actual stratum. In order to better distinguish different simulated strata, different colored marking layers can be used to separate different simulated strata; after the multiple layers of simulated strata are stacked and laid, a layer of quartz sand protective layer is added on the top. Optionally, the simulated stratum material can use 40 to 80 mesh loose quartz sand.

[0030] Optionally, the length of the fan-shaped wedge block is equal to the width of the U-shaped test trough, and the width of the fan-shaped surface of the fan-shaped wedge block corresponds to the extrusion deformation of the simulated stratum in the U-shaped test trough; the top of the fan-shaped wedge block is fixed on the U-shaped test trough by fixing bolts and blocking bolts to perform initial extrusion and fixation on the simulated stratum in the U-shaped test trough. The maximum length L of the fan-shaped wedge block ① is equal to the width of the U-shaped test trough 30cm, and it is fan-shaped; the width H of the fan-shaped surface can be designed and adjusted according to the parameters such as 0-5%, 0-10%, 0-15% and 0-20% of the shortening amount of the length extrusion deformation of the simulated stratum in the simulation experiment. For example, if the length of the stratum in the U-shaped test trough is 60cm, the maximum width H of the fan-shaped surface of the fan-shaped wedge block can be made into 3.0cm, 6.0cm, 9.0cm and 12.0cm respectively.

[0031] Optionally, the fan-shaped wedge block, dovetail groove guide rail and fixed baffle are provided with bolt holes of equal distance in the same position, and bolts are used to fix the fan-shaped wedge block to the dovetail groove guide rail, and the dovetail groove guide rail to the fixed baffle. Among them, the dovetail groove guide rail ② has a flat surface on one side and a dovetail groove on the other side, which can play a role in relative fixing and directional guiding of the bump roller ③, preventing the bump roller from sliding up and down and causing the force direction to change, and can also facilitate integrated operation.

[0032] like Figure 2 As shown, the fan-shaped wedge block and the first dovetail groove guide rail are both provided with equally spaced bolt holes (e.g., 3 rows of 9 equally spaced bolt holes), and the fan-shaped wedge block and the first dovetail groove guide rail are fixedly connected by bolts to form an integral assembly. The dovetail groove guide rail ② is fixedly installed in the middle of the fan-shaped wedge block ①, so as to apply uniform thrust to the fan-shaped wedge block.

[0033] The fixed baffle plate ④ and the second dovetail groove guide rail are both provided with equidistant bolt holes (e.g., 3 rows of 9-hole bolt holes equidistantly spaced), and the fixed baffle plate and the second dovetail groove guide rail are fixedly connected by bolts. The second dovetail groove guide rail is installed corresponding to the first dovetail groove guide rail, and the fixed baffle plate is fixed to the two side groove walls of the U-shaped experimental groove.

[0034] Optionally, the protrusion of the protrusion roller corresponds to the dovetail groove of the dovetail groove guide rail, forming a snap-fit ​​connection relationship; an external force is applied to the external power push rod to move the protrusion roller from the top of the fan-shaped wedge block toward the fan-shaped surface end to apply extrusion pressure to the simulated stratum. Among them, the protrusion roller ③ is provided with a protrusion corresponding to the dovetail groove guide rail, and the shape of the protrusion corresponds to the shape of the dovetail groove of the dovetail groove guide rail, forming a snap-fit ​​connection relationship. The shaft of the protrusion roller is provided with an external power push rod, which is driven by the external power to push the protrusion roller to move; the thickness of the protrusion roller is consistent with the width h between the two dovetail groove guide rails. For example, if the diameter of the protrusion roller Ф=10cm, the width between the first dovetail groove guide rail and the second dovetail groove guide rail is also 10cm.

[0035] Among them, Figure 3 as well as Figure 4 As shown, Figure 3 This is a side view of the physical simulation experimental device for wedge-shaped compression stratum structural deformation. Figure 4 ⑥ is the end side view of the dovetail groove guide rail ②, and ⑦ is the side view of the bump roller ③. The fan-shaped wedge block ①, dovetail groove guide rail ②, bump roller ③ and fixed baffle ④ together constitute a complete power transmission device, which is driven by external force to complete the physical simulation experiment of wedge-shaped extrusion deformation.

[0036] Optionally, the device further includes a scanning device; wherein the scanning device is integrated into the wedge-shaped compression stratum structure deformation physical simulation experimental device, and is used to obtain the stratum thickness change, stratum deformation state, and stratum transverse and longitudinal deformation characteristics of the simulated stratum when it is squeezed. The scanning device may refer to a CT scanning device, which is used to obtain the morphological changes of the simulated stratum when the wedge-shaped compression stratum structure is squeezed and deformed. The morphological changes include but are not limited to stratum thickness change, stratum deformation state, and stratum transverse and longitudinal deformation characteristics.

[0037] An embodiment of the present invention provides a physical simulation experimental device for wedge-shaped compression stratum structural deformation, the device comprising: a fan-shaped wedge block, a dovetail groove guide rail, a protrusion roller, a fixed baffle and a U-shaped experimental groove; wherein the fan-shaped wedge block is fixedly connected to the plane side of the first dovetail groove guide rail, and the top of the fan-shaped wedge block is fixed on the U-shaped experimental groove; wherein the fan-shaped wedge block and the first dovetail groove guide rail are both provided with corresponding bolt holes; the fixed baffle is provided with a second dovetail groove guide rail of the same length as the first dovetail groove guide rail, and the fixed baffle is fixed on the U-shaped experimental groove; the dovetail groove guide rail comprises a first dovetail groove guide rail and a second dovetail groove guide rail; the protrusion roller is provided with a protrusion corresponding to the dovetail groove guide rail and an external power push rod, and is installed between the first dovetail groove guide rail and the second dovetail groove guide rail; the external power push rod is used to apply thrust to the fan-shaped wedge block. By adopting the technical solution of the embodiment of the present invention, a combined structural component of a fan-shaped wedge block, a dovetail groove guide rail and a convex roller is creatively designed. By applying an external thrust, the fan-shaped wedge block is pushed to wedge-extrude the simulated formation to cause structural deformation of the formation, so as to study and analyze the structural deformation process and deformation state of the wedge-extrusion formation, obtain the structural deformation pattern of the salt layer system stratum wedge-extrusion, and guide the sub-salt oil and gas exploration of the salt-bearing strata.

[0038] Figure 5 The flowchart of a physical simulation experimental method for wedge-shaped squeeze stratum structural deformation provided in an embodiment of the present invention. The embodiment of the present invention further optimizes the above embodiment on the basis of the above embodiment, and the embodiment of the present invention can be combined with various optional solutions in one or more of the above embodiments. Figure 5 As shown, the wedge-shaped compression stratum structural deformation physical simulation experimental device and experimental method provided in the embodiment of the present invention may include the following steps:

[0039] S510, determining the simulation experiment stratum material, stratum layer number and target extrusion deformation.

[0040] Among them, when conducting a physical simulation experiment of wedge-shaped extrusion stratum structural deformation, the target extrusion deformation of the simulated stratum is determined, and the determination of the target extrusion deformation is to determine the target fan-shaped wedge block. The simulation experiment stratum material is determined, and the stratum material can be selected from 40-80 mesh loose quartz sand, and the thickness of each simulated stratum layer can be set to 0.5-1.5 cm according to the similarity ratio of the actual stratum; in order to better distinguish different strata, different layers can be separated by marker layers of different colors; after the multiple layers of simulated strata are stacked and laid, a layer of quartz sand protection layer is added on the top.

[0041] S520, determining a target fan-shaped wedge block according to the target extrusion deformation amount, and constructing a wedge-shaped extrusion stratum structural deformation physical simulation experimental device.

[0042] like Figure 6 As shown, the target extrusion deformation of the simulated stratum is determined, and the target fan-shaped wedge block is determined based on the target extrusion deformation. For example, the length of the U-shaped experimental groove is 60 cm, the target extrusion deformation is 5%, and the fan surface width of the target fan-shaped wedge block is 3.0 cm. After determining the target fan-shaped wedge block, the simulated experimental stratum material⑧ simulating different lithological strata is filled in the U-shaped experimental groove, and different stratum layers are set. The target fan-shaped wedge block and the dovetail groove guide rail assembly are fixed by fixing bolts and blocking bolts to construct a wedge-shaped extrusion stratum structural deformation physical simulation experimental device, and constitute the initial state of the wedge-shaped extrusion stratum structural deformation physical simulation experiment.

[0043] S530, setting the extrusion deformation speed and the extrusion deformation duration, and applying external force to the external power push rod to move the bump roller from the top of the fan-shaped wedge block toward the fan-shaped surface end, so as to apply extrusion force to the simulated formation.

[0044] Among them, the extrusion deformation speed and the extrusion deformation duration are set, and the size of the external driving force can be measured and controlled by the hydraulic cylinder, and can be set to a fixed size or an adjustable size. The hydraulic cylinder uses the external power push rod to push the convex roller to move laterally, and the convex roller then pushes the fan-shaped wedge block with a dovetail groove guide rail to offset; as the convex roller moves to the other side, the extrusion pressure on the dovetail groove side of the fan-shaped wedge block increases, and the corresponding side of the fan-shaped wedge block generates uneven extrusion pressure on the simulated formation in the U-shaped test trough, causing the formation to deform. Figure 7 As shown in the figure, when the convex roller is close to the groove wall on the other side of the U-shaped experimental groove, the displacement of the fan-shaped end of the fan-shaped wedge block is the largest, and the extrusion deformation of the simulated stratum is the largest. After the whole process is completed, it is a complete extrusion experiment process. The wedge-shaped extrusion stratum structural deformation physical simulation experiment device is used to change the original unidirectional horizontal coaxial extrusion simulation experiment into a wedge-shaped gradual extrusion deformation simulation experiment. When the external thrust of the hydraulic cylinder remains unchanged, the fan-shaped wedge block is used to squeeze the stratum deformation force from the initial F=0 to a maximum value step by step.

[0045] Among them, according to the experimental requirements, fan-shaped wedge blocks of different sizes can be selected to complete simulation experiments with different amounts of compression deformation of strata; multiple experimental parameters such as different numbers of simulated strata (such as 3 layers, 4 layers or 5 layers, etc.), different extrusion deformation rates and different extrusion deformation durations can also be set to carry out multiple groups of experiments.

[0046] As an optional but non-limiting implementation, the method further includes but is not limited to steps A1-A3:

[0047] Step A1: Setting a scanning time interval of a scanning device, and using the scanning device to obtain surface data when the simulated stratum is squeezed; the surface data includes stratum thickness change data, stratum deformation state data, and stratum transverse and longitudinal deformation characteristic data.

[0048] Step A2: Load the surface data into reconstruction software to construct a three-dimensional data volume.

[0049] Step A3: Load the three-dimensional data body into the grayscale editing and analysis software to determine the thickness change, deformation state and lateral and longitudinal deformation characteristics of different simulated strata when squeezed; different simulated strata are separated by different color marking layers.

[0050] Among them, the scanning equipment takes the CT scanning equipment as an example. According to the real geological background of different stratigraphic structural compression deformation and the experimental similarity ratio, the experimental plan is designed to make the experimental model, and the wedge-shaped compression structural deformation physical model experiment is completed on the experimental device platform; at the beginning of the experiment, the physical model experimental model is placed in the data acquisition industrial CT scanning system, and the physical model experiment is scanned and collected in real time according to the set collection interval. During the scanning, three CT observation scanning positions are set (such as Figure 2 The collected surface data is loaded into professional reconstruction software to reconstruct a three-dimensional data volume; the reconstructed three-dimensional data volume model is loaded into professional grayscale editing and analysis software, and different strata are distinguished by using different color marker layers between strata, and quantitative statistics are made on the changes in stratum thickness, stratum deformation morphology, and vertical and horizontal deformation characteristics of strata at different compression deformation times.

[0051] As an optional but non-limiting implementation, the method further includes but is not limited to steps B1-B3:

[0052] Step B1: Under the experimental conditions of the same extrusion deformation speed and different sizes of the fan-shaped wedge blocks, obtain the data of the change of the formation thickness of the simulated formation during the extrusion with the extrusion time.

[0053] Step B2: constructing a first squeezing time-stratum thickness intersection diagram based on the data of the variation of the stratum thickness with the squeezing time.

[0054] Step B3: Analyze the deformation state of the wedge-shaped extrusion formation structure based on the first extrusion time-formation thickness intersection diagram.

[0055] Among them, the quantitative analysis method is adopted, with the cumulative thickness H of the stratum after quantitative measurement as the ordinate Y, and the extrusion deformation time T as the abscissa X, to obtain the TH plate; in this way, when only the size of the fan-shaped wedge block is changed and other experimental conditions remain unchanged, the first extrusion time-stratum thickness cross-plot of four groups of shortening of the stratum thickness extrusion deformation of 0-5%, 0-10%, 0-15% and 0-20% can be obtained. Through the first extrusion time-stratum thickness cross-plot, the change of stratum thickness with extrusion time under different extrusion scales of the wedge-shaped extrusion stratum structure can be determined.

[0056] As an optional but non-limiting implementation, the method further includes but is not limited to steps C1-C3:

[0057] Step C1: Under the experimental conditions that the fan-shaped wedge blocks have the same size and different extrusion deformation speeds, obtain the data of the change of the formation thickness of the simulated formation with the extrusion time when it is squeezed.

[0058] Step C2: constructing a second squeezing time-stratum thickness intersection diagram based on the data of the variation of the stratum thickness with the squeezing time.

[0059] Step C3: analyzing the deformation state of the wedge-shaped extrusion stratum structure according to the second extrusion time-stratum thickness intersection diagram.

[0060] In an optional scheme of an embodiment of the present invention, a group of fan-shaped wedge blocks can be selected with the same size and the extrusion deformation speed can be changed to obtain a second extrusion time-stratum thickness intersection diagram to analyze the deformation state of the wedge extrusion stratum structure. For example, the target extrusion deformation amount is 0-20%, the size of the fan-shaped wedge block is 12.0 cm, and the extrusion deformation speed is 0.1 cm / min, 0.2 cm / min or 0.3 cm / min, respectively, to obtain the second extrusion time-stratum thickness intersection diagram. Through multi-parameter experiments and result analysis, it is helpful to improve the accuracy of wedge extrusion structural deformation analysis and guide the interpretation of similar geological phenomena and the analysis of the causal mechanism.

[0061] An embodiment of the present invention provides a physical simulation experiment method for wedge-shaped extrusion stratum structural deformation, which determines the simulation experiment stratum material, the number of stratum layers and the target extrusion deformation amount; determines the target fan-shaped wedge block according to the target extrusion deformation amount, and constructs a physical simulation experiment device for wedge-shaped extrusion stratum structural deformation; wherein a scanning device is integrated in the physical simulation experiment device for wedge-shaped extrusion stratum structural deformation; sets the extrusion deformation speed and the extrusion deformation duration, and applies an external force to an external power push rod to move the convex block roller from the top of the fan-shaped wedge block toward the fan-shaped surface end, so as to apply extrusion force to the simulated stratum. By adopting industrial CT scanning technology, it is possible to quantitatively study the stratum deformation and the internal deformation characteristics of the model stratum from any direction without destroying the experimental model structure and reducing the manual workload, extract the quantitative parameters of the vertical and horizontal deformation of the stratum and the spatial distribution of the stratum and other information, and establish a quantitative evaluation plate, which greatly improves the efficiency of the research and analysis of the structural characteristics of the wedge-shaped compression structure deformation. It can effectively solve the deformation mechanism analysis of complex structural deformation areas, structural closure evaluation and prediction of favorable areas of oil and gas reservoirs, and guide the deployment of oil and gas exploration targets and exploration breakthroughs.

Claims

1. A physical simulation experimental device for wedge-shaped compression stratum structural deformation, characterized in that: The device comprises: a fan-shaped wedge block, a dovetail groove guide rail, a convex roller, a fixed baffle and a U-shaped test groove; wherein, The fan-shaped wedge block is fixedly connected to the plane side of the first dovetail groove guide rail, and the top end of the fan-shaped wedge block is fixed to the U-shaped test groove; wherein the fan-shaped wedge block and the first dovetail groove guide rail are both provided with corresponding bolt holes; The fixed baffle is provided with a second dovetail groove guide rail having the same length as the first dovetail groove guide rail, and the fixed baffle is fixed on the U-shaped experimental groove; the dovetail groove guide rail includes a first dovetail groove guide rail and a second dovetail groove guide rail; The lug roller is provided with a lug corresponding to the dovetail groove guide rail and an external power push rod, and is installed between the first dovetail groove guide rail and the second dovetail groove guide rail; the external power push rod is used to apply thrust to the fan-shaped wedge block.

2. The experimental device according to claim 1, characterized in that: The U-shaped experimental tank is provided with formation materials simulating formations, and the simulated formations are separated by marking layers of different colors.

3. The experimental device according to claim 1, characterized in that: The fan-shaped wedge block, dovetail groove guide rail and fixed baffle are provided with equidistant bolt holes at the same position, and bolts are used to fix the fan-shaped wedge block and the dovetail groove guide rail, and the dovetail groove guide rail and the fixed baffle.

4. The experimental device according to claim 2, characterized in that: The length of the fan-shaped wedge block is equal to the width of the U-shaped experimental groove, and the width of the fan-shaped surface of the fan-shaped wedge block corresponds to the extrusion deformation amount of the simulated formation in the U-shaped experimental groove; the top end of the fan-shaped wedge block is fixed to the U-shaped experimental groove by a fixing bolt and a blocking bolt to perform initial extrusion and fixation on the simulated formation in the U-shaped experimental groove.

5. The experimental device according to claim 1, characterized in that: The protrusion of the protrusion roller corresponds to the dovetail groove of the dovetail groove guide rail, forming a snap-fit ​​connection relationship; an external force is applied to the external power push rod to move the protrusion roller from the top of the fan-shaped wedge block toward the fan-shaped surface end to apply extrusion force to the simulated formation.

6. The experimental device according to claim 1, characterized in that: The apparatus further comprises a scanning device; wherein, The scanning device is integrated into a wedge-shaped compression stratum structural deformation physical simulation experimental device, and is used to obtain the stratum thickness change, stratum deformation state, and lateral and longitudinal deformation characteristics of the simulated stratum when it is squeezed.

7. A physical simulation experimental method for wedge-shaped compression stratum structural deformation, characterized in that: The method comprises: Determine the stratum material, stratum number and target extrusion deformation of the simulation experiment; Determine the target fan-shaped wedge block according to the target extrusion deformation amount, and construct a wedge-shaped extrusion stratum structural deformation physical simulation experimental device; wherein the wedge-shaped extrusion stratum structural deformation physical simulation experimental device is integrated with a scanning device; The extrusion deformation speed and the extrusion deformation duration are set, and an external force is applied to the external power push rod to make the convex block roller move from the top of the fan-shaped wedge block toward the fan-shaped surface end, so as to apply extrusion force to the simulated formation.

8. The method according to claim 7, characterized in that The method further comprises: Setting a scanning time interval of a scanning device, and using the scanning device to obtain surface data when the simulated stratum is squeezed; the surface data includes stratum thickness change data, stratum deformation state data, and stratum transverse and longitudinal deformation characteristic data; Loading the surface data into reconstruction software to construct a three-dimensional data volume; The three-dimensional data body is loaded into the grayscale editing and analysis software to determine the thickness change, deformation state and transverse and longitudinal deformation characteristics of different simulated strata when squeezed; different simulated strata are separated by different color marking layers.

9. The experimental method according to claim 8, characterized in that: The method further comprises: Under the experimental conditions of the same extrusion deformation speed and different sizes of the fan-shaped wedge blocks, the data of the variation of the thickness of the simulated stratum with the extrusion time when the stratum is squeezed is obtained; Constructing a first squeezing time-stratum thickness intersection diagram according to the variation data of the stratum thickness with squeezing time; The deformation state of the wedge-shaped compression formation structure is analyzed based on the first compression time-formation thickness intersection diagram.

10. The experimental method according to claim 8, characterized in that: The method further comprises: Under the experimental conditions of the same size of the fan-shaped wedge blocks and different compression deformation speeds, the data of the change of the formation thickness with the compression time when the simulated formation is squeezed are obtained; Constructing a second squeezing time-stratum thickness intersection diagram according to the variation data of the stratum thickness with squeezing time; The deformation state of the wedge-shaped compression stratum structure is analyzed based on the second compression time-stratum thickness intersection diagram.

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