CN-122016472-A - Metamorphic core and muck separation simulation experiment device and method

CN122016472ACN 122016472 ACN122016472 ACN 122016472ACN-122016472-A

Abstract

The invention relates to a metamorphic core and parasitic rock separation simulation experiment device and method, wherein the device comprises a supporting platform and a plurality of experiment elements to form an experiment module in a combined mode, the first experiment module comprises a driving assembly provided with a movable plate, a first enclosing assembly and a first movable baffle plate, the first movable baffle plate is movable and is arranged opposite to the movable plate, the second experiment module comprises the driving assembly, a second enclosing assembly and a second fixed baffle plate, the movable plate is opposite to the second fixed baffle plate and is movable, the third experiment module comprises the driving assembly, a third enclosing assembly and a third movable baffle plate, the stretching direction of the driving assembly is perpendicular to the moving direction of the third movable baffle plate. The device adopts a modularized design, and supports the rapid switching of three experimental modes of free gravity stretching, constant-speed stretching and anisotropic stretching superposition.

Inventors

LI HONGBO
PENG GUANGRONG
ZHANG LILI
QIU XINWEI
CAI JUNJIE
Tang lishan
GUO JIA

Assignees

中海石油(中国)有限公司深圳分公司
中海石油深海开发有限公司

Dates

Publication Date: 20260512
Application Date: 20260213

Claims (10)

1. The metamorphic core and muck separation simulation experiment device is characterized by comprising a supporting platform (1) and an experiment element arranged on the supporting platform (1); The experimental element comprises a driving component (2), a first enclosing component (3), a second enclosing component (4) and a third enclosing component (5), a first movable baffle (6), a second fixed baffle (7) and a third movable baffle (8), wherein the driving component (2) comprises a driving piece (21) and a movable plate (23) which can linearly move under the driving of the driving piece (21), and the movable plate (23) is used for being matched to form an enclosing area; The experimental device is configured by combining different experimental elements, and any one of the following three experimental modules is formed by switching: The first experiment module is used for free gravity stretching, comprises a driving assembly (2), a first enclosing assembly (3) and a first movable baffle (6) and is used for constructing a first enclosing area, wherein the first movable baffle (6) is arranged opposite to the movable plate (23) and is configured to move outwards under the force of gravity; The second experiment module for constant-rate stretching comprises a driving assembly (2), a second enclosing assembly (4) and a second fixed baffle (7) and is used for constructing a second enclosing area, wherein a movable plate (23) is arranged opposite to the second fixed baffle (7), and the movable plate (23) is configured to move outwards at a preset rate under the driving of a driving piece (21); the third experiment module for the different-direction stretching superposition comprises a driving assembly (2), a third enclosing assembly (5) and a third movable baffle plate (8) and is used for constructing a third enclosing area, wherein the third movable baffle plate (8) is configured to move outwards under the force of gravity, the movable plate (23) is configured to move outwards at a preset speed under the force of a driving piece (21), and the moving direction of the movable plate (23) is perpendicular to the moving direction of the third movable baffle plate (8).
2. The metamorphic core and muck separation simulation experiment device according to claim 1 is characterized in that the supporting platform (1) is a polished metal base, and pulley assemblies are arranged at the bottoms of the first movable baffle (6) and the third movable baffle (8).
3. The metamorphic core and sundry rock separation simulation experiment device according to claim 1, wherein the first surrounding assembly (3) comprises a plurality of transparent toughened glass plates, and forms a square structure with the first movable baffle (6) and the movable plate (23); The second enclosing assembly (4) comprises a plurality of transparent toughened glass plates, and forms a square structure with the second fixed baffle (7) and the movable plate (23); The third enclosing assembly (5) comprises a plurality of transparent acrylic plates, and forms a right trapezoid structure together with the third movable baffle (8) and the movable plate (23), wherein the third movable baffle (8) is provided with an inclined side surface (81) for forming a hypotenuse of the right trapezoid structure.
4. The metamorphic core muck separation simulation experiment device according to claim 1, wherein the third surrounding assembly (5) comprises a plurality of coamings standing on the supporting platform (1), including a first coamings (51), a second coamings (52) and a third coamings (53); In the third experiment module, a first coaming (51) and a second coaming (52) are vertically connected, the plate surface of the first coaming (51) is spatially parallel to the stretching direction of the driving assembly (2), a third coaming (53) is parallel to the first coaming (51) and is spaced from the second coaming (52), a movable plate (23) is arranged between the third coaming (53) and the first coaming (51) and is parallel to the second coaming (52), a third movable baffle (8) is of a right triangle structure, and is inserted between the third coaming (53) and the second coaming (52) from the opposite side of the first coaming (51), and one side of a bevel edge of the third movable baffle (8) is used for forming the boundary of a third enclosing area.
5. The metamorphic core-muck separation simulation experiment device according to claim 4, wherein the angle between the inclined side and the long right-angle side of the third movable baffle (8) is 30 ° -60 °.
6. A metamorphic core-muck separation simulation experiment method, which is characterized in that the experiment method is realized by adopting the metamorphic core-muck separation simulation experiment device according to any one of claims 1-5, and the steps comprise: The free gravity stretching experiment step comprises the steps of constructing a first enclosing area by utilizing a first experiment module, paving an experiment material to form a basal layer and a brittle layer, and enabling a first movable baffle (6) to slide outwards under the action of gravitational potential energy of the experiment material; The constant-rate stretching experiment step comprises the steps of constructing a second enclosing area by using a second experiment module, paving an experiment material to form a basal layer and a brittle layer, taking whether a viscous medium is embedded in the basal layer as a control variable, and then controlling a movable plate (23) to stretch the experiment material at the optimal stretching rate; And the step of the heterodromous stretching superposition experiment comprises the steps of constructing a third surrounding area by utilizing a third experiment module, paving an experiment material to form a basal layer and a brittle layer, embedding a viscous medium into the basal layer, and then carrying out outward sliding by the gravity of a third movable baffle (8) and mechanical outward stretching of a movable plate (23) at the optimal stretching speed to simulate the stress field rotation and non-coaxial deformation process so as to obtain an experiment result.
7. The metamorphic core-muck separation simulation experiment method according to claim 6, wherein the free gravity stretching experiment step specifically comprises: providing a first set of experimental materials, the first set of experimental materials comprising a base material and a brittle material; Combining and constructing a first experiment module; Uniformly paving a substrate material serving as a substrate layer in the first surrounding area, and paving a particle material serving as a brittle layer on the substrate material; releasing the limit of the first movable baffle (6) to enable the first movable baffle to move in a direction away from the movable plate (23) under the action of the gravity of the material; Controlling the moving distance of the first movable baffle (6), paving the same deposited granular material after each period of movement is finished, and repeating for a plurality of times; based on the steps, a plurality of groups of experiment comparison are carried out, an experiment group with the structural style most consistent with the preset prototype is screened, and the stretching rate is determined as the optimal stretching rate of the subsequent experiment.
8. The metamorphic core-muck separation simulation experiment method according to claim 6, wherein the constant-rate stretching experiment step specifically comprises: providing a second group of experimental materials, wherein the second group of experimental materials comprise a base material, a brittle material and a viscous medium for simulating a rheological anomaly, and the viscosity of the viscous medium is lower than that of the base material; Constructing a second experiment module in a combined mode; adding a substrate material and a brittle material into the second surrounding area to construct a substrate layer and a brittle layer, and embedding a viscous medium at a preset position of the substrate layer to serve as an experimental variable; controlling the movable plate (23) to stretch the material continuously at an optimal stretching rate; And setting a comparison reference group without embedded viscous medium, and recording the inclination angle evolution difference of the detached faults in the two groups of experiments, so as to confirm the action of the rheological abnormal body.
9. The metamorphic core-muck separation simulation experiment method according to claim 6, wherein the step of anisotropic stretching and stacking experiment specifically comprises: Providing a third group of experimental materials, wherein the third group of experimental materials comprise a base material, a brittle material and a viscous medium for simulating a rheological anomaly, and the viscosity of the viscous medium is lower than that of the base material; Combining and constructing a third experiment module; Paving a basal layer in a third surrounding area, arranging an etching groove (9) at a preset position of the basal layer, and pouring a viscous medium; The stress is applied in the third stage, wherein the limit of the third movable baffle (8) is released in the first stage, the third movable baffle is controlled to stretch for a first preset length under the action of gravity, the movable plate (23) is controlled to stretch for a second preset length at the optimal stretching rate in the second stage, and the movable plate (23) is maintained to continuously stretch for a third preset length in the third stage, so that an experiment result is obtained.
10. The metamorphic nucleus and omnirange separation simulation experiment method according to claim 9 is characterized in that silica gel with the viscosity of 5000 Pa.s is selected as a base material, the paving thickness is 8cm, a plurality of etching grooves (9) are configured and are all in strip shapes and are embedded on a base layer at intervals along the moving direction of a third moving baffle (8), silica gel with the viscosity of 2000 Pa.s is selected as a viscous medium, quartz sand with the viscosity of 40-70 meshes or 80-120 meshes is selected as a brittle material, the thickness of a single layer is controlled to be 10+/-0.5 mm in a layering paving mode, and mineral coloring agents are doped between layers to serve as time sequence marks; In the third stage of applying stress, the third movable shutter (8) in the first stage is stretched 5cm, the movable plate (23) in the second stage is stretched 9cm at a constant rate of 0.1cm/min, and the movable plate (23) in the third stage is kept continuously pulled 4cm.

Description

Metamorphic core and muck separation simulation experiment device and method Technical Field The invention relates to the technical field of geological physical simulation of structures, in particular to a metamorphic nuclear parasitic rock separation simulation experiment device and method. Background Metamorphic core muck is an important manifestation of the rock ring stretch configuration, the evolution of which is often accompanied by complex stress field changes and deep thermodynamic processes. In the field of oil and gas exploration, the deep understanding of the uncoupling mechanism of metamorphic nuclear parasitic rock is important for revealing the evolution law of a fractured basin. At present, the traditional sand box simulation experiment has some limitations when researching the structure, the traditional device can only realize stretching or extrusion in a single direction, the dynamic rotation and multi-period anisotropic superposition process of a stress field which are common in nature cannot be reproduced, and the fixed experimental device is difficult to adapt to the anisotropic stress superposition requirement. As the prior art does not effectively solve the problems, the application precision and reliability of the structural physical simulation in complex basin evolution research are severely restricted. Disclosure of Invention The invention aims to solve the technical problem of providing a metamorphic core and muzzle rock separation simulation experiment device and method. The technical scheme adopted for solving the technical problems is that a metamorphic nuclear varirock separation simulation experiment device is constructed and comprises a supporting platform and an experiment element arranged on the supporting platform; the experimental element comprises a driving component, a first enclosing component, a second enclosing component, a third enclosing component, a first movable baffle, a second fixed baffle and a third movable baffle, wherein the driving component comprises a driving piece and a movable plate connected with the driving piece, and the movable plate is used for forming an enclosing area in a matching way and can move along a straight line under the driving of the driving piece; The experimental device is configured by combining different experimental elements, and any one of the following three experimental modules is formed by switching: The first experiment module comprises a driving assembly, a first enclosing assembly and a first movable baffle plate, wherein the first movable baffle plate is arranged opposite to the movable plate and is configured to move outwards under the force of gravity; The second experiment module comprises a driving assembly, a second enclosing assembly and a second fixed baffle plate, wherein the driving assembly, the second enclosing assembly and the second fixed baffle plate are used for constructing a second enclosing area; The third experiment module comprises a driving assembly, a third enclosing assembly and a third movable baffle plate, wherein the third movable baffle plate module is used for constructing a third enclosing area, the third movable baffle plate module is configured to move outwards under the force of gravity, the movable plate is configured to move outwards at a preset speed under the force of a driving piece, and the moving direction of the movable plate is perpendicular to the moving direction of the third movable baffle plate. In some embodiments, the support platform is a polished metal base, and pulley assemblies are mounted at the bottoms of the first moving baffle and the third moving baffle. In some embodiments, the first enclosing assembly comprises a plurality of transparent toughened glass, and forms a square structure with the first movable baffle and the movable plate; the second enclosing assembly comprises a plurality of transparent toughened glass blocks, and forms a square structure with the second fixed baffle and the movable plate; The third enclosing assembly comprises a plurality of transparent acrylic plates, a right trapezoid structure formed by the third enclosing assembly, a third movable baffle and a movable plate, wherein the third movable baffle is provided with an inclined side face for forming a hypotenuse of the right trapezoid structure. In some embodiments, the third enclosure assembly includes a plurality of enclosures standing on the support platform including a first enclosure, a second enclosure, and a third enclosure; In the third experiment module, the first coaming and the second coaming are vertically connected, the plate surface of the first coaming is parallel to the stretching direction of the driving assembly in space, the third coaming is parallel to the first coaming and is spaced from the second coaming, the movable plate is arranged between the third coaming and the first coaming and is parallel to the second coaming, the third movable baffle is of a right triangl