CN-119296427-B - Experimental device and method integrating inversion construction and fluid migration

CN119296427BCN 119296427 BCN119296427 BCN 119296427BCN-119296427-B

Abstract

The invention provides an experimental device and method integrating a reverse structure and fluid migration, comprising an experimental box, a push-pull power mechanism and a fluid injection mechanism, wherein the experimental box is a rectangular box body, an experimental model simulating a stratum structure is arranged in the experimental box, the push-pull power mechanism is connected with the experimental box and pushes and pulls the experimental model in the experimental box so as to stretch or squeeze the simulated stratum, and the fluid injection mechanism laterally injects dyeing fluid from the experimental model. The invention can simulate the deformation process of the extrusion structure on the stretching simulation result of uniform stress transmission, and complete fluid migration simulation under the condition of not damaging the elastic polymer used in the stretching simulation experiment, thereby effectively combining inversion structure simulation of stretching before extrusion and fluid migration simulation.

Inventors

ZHANG CHENYU
DENG PENG
LU JIANLIN
WANG BIN
Shan Shuaiqiang
ZUO ZONGXIN

Assignees

中国石油化工股份有限公司
中国石油化工股份有限公司石油勘探开发研究院

Dates

Publication Date: 20260508
Application Date: 20230710

Claims (11)

1. An experimental apparatus for integrating a reverse configuration with fluid transport, comprising: the experimental box (1), wherein the experimental box (1) is a rectangular box body, and an experimental model (4) for simulating a stratum structure is arranged in the experimental box (1); A push-pull power mechanism (2) connected with the experiment box (1) and pushing and pulling the experiment model (4) in the experiment box (1) to stretch or squeeze the simulated stratum, and A fluid injection mechanism (3), the fluid injection mechanism (3) injecting the staining fluid laterally from the experimental model (4); the push-pull power mechanism (2) stretches and then extrudes the experimental model (4) so as to simulate formation inversion structural deformation, the fluid injection mechanism (3) injects dyeing fluid into the experimental model (4), and fluid migration simulation experiments are carried out on the basis of inversion structural deformation; the experimental box (1) comprises an experimental platform (11) at the bottom, and transparent baffles (12) are arranged on the edges of the two sides and the rear side of the experimental platform (11); The front side of the experiment platform (11) is provided with a double-layer push-pull structure connected with a push-pull power mechanism (2); The push-pull power mechanism (2) comprises a power electric cylinder (21), wherein a push rod (22) connected with the double-layer push-pull structure is arranged on the power electric cylinder (21), and the push rod (22) stretches or contracts under the action of the power electric cylinder (21); The double-layer push-pull structure comprises a stretching push plate (13) close to one side of the power electric cylinder (21) and an extrusion push plate (14) far away from one side of the power electric cylinder (21), and a through hole is formed in the stretching push plate (13); The push rod (22) passes through the through hole, and the front end of the push rod (22) is provided with a push plate (23), and the push plate (23) is arranged between the stretching push plate (13) and the extrusion push plate (14); The experimental platform (11) is provided with an elastic layer, the rear end of the elastic layer is fixedly connected with the transparent baffle (12) at the rear side, and the two sides of the elastic layer are respectively and movably connected with the transparent baffles (12) at the left side and the rear side; the front end of the elastic layer is fixedly connected with the stretching push plate (13) and stretches along with the forward movement of the stretching push plate (13); The stretching pushing plate (13) can be fixed on the experiment platform (11) and separated from the extrusion pushing plate (14) and does not move along with the movement of the extrusion pushing plate (14).
2. The inversion construction and fluid migration integrated experimental apparatus according to claim 1, wherein a push plate groove (15) is provided on the extrusion push plate (14), and the push plate (23) is provided in the push plate groove (15).
3. The experimental device with integrated inversion construction and fluid migration according to claim 2, wherein the two sides of the experimental platform (11) are provided with groove guide rails (16), a plurality of traction rings (17) are arranged in the groove guide rails (16), the two sides of the elastic layer pass through the side transparent baffle plates (12), and the edges are connected with the traction rings (17); the traction ring (17) moves flexibly in the guide rail along with the stretching deformation of the elastic layer.
4. An experimental device with integrated reverse construction and fluid transportation according to claim 3, wherein the front and rear ends of the transparent baffle plate (12) at both sides of the experimental platform (11) are fixedly connected with the experimental platform (11) through fixing blocks (18), and the elastic layer is sealed and slides through a gap between the bottom of the transparent baffle plate (12) and the experimental platform (11) and extends onto the groove guide rail (16).
5. The experimental device with integrated inversion structure and fluid migration according to claim 4, wherein a plurality of injection holes (32) are correspondingly arranged on the stretching pushing plate (13) and the extrusion pushing plate (14), the injection holes (32) are sealed by plugs, the fluid injection mechanism (3) can be connected after the plugs are detached, and the fluid injection mechanism (3) injects dyeing fluid into the experimental box (1) through the injection holes (32).
6. The experimental device with integrated reversing construction and fluid migration according to claim 5, wherein the fluid injection mechanism (3) comprises a fluid control injection pump (31), at least one liquid injection hose (34) is arranged on the fluid control injection pump (31), a conveying pipe (33) is connected to the liquid injection hose (34), and the conveying pipe (33) can be inserted into the injection hole (32).
7. The device according to claim 6, wherein the elastic layer is a silica gel sheet (41), the transparent baffle (12) is a glass plate coated with a hydrophobic material, and the surface of the conveying pipe (33) is coated with the hydrophobic material.
8. A physical simulation experiment method of integrating a reverse construction with fluid migration, characterized in that an experiment is performed using the experimental apparatus of integrating a reverse construction with fluid migration according to any one of claims 1 to 7, comprising: Step one, arranging experimental materials in an experimental box (1) to form an extension simulation experiment simulated stratum, and carrying out an extension simulation experiment; step two, laying experimental materials to form an extrusion simulation experiment simulated stratum, and carrying out the extrusion simulation experiment; Step three, paving a protective layer (47) on the top of the simulated stratum of the extrusion simulation experiment; pumping dyeing fluid to perform fluid migration simulation experiments; And fifthly, removing a transparent baffle plate (12) on one side, and performing slice observation and photographing recording on the experimental model (4) at intervals of 1-2cm to obtain the fluid migration position, direction and main storage position.
9. The method according to claim 8, wherein in the first step, experimental materials are arranged in the experimental box (1), a silica gel fluid layer and an interaction layer are sequentially arranged to form an extension simulation experiment simulated stratum, and the push-pull power mechanism (2) pulls the double-layer push-pull structure, the elastic layer and the extension simulation experiment simulated stratum to move forwards to perform the extension simulation experiment.
10. The method according to claim 9, wherein in the second step, the stretching pushing plate (13) is fixed, and experimental materials are distributed to form an extrusion simulation experiment simulated stratum; Wherein the extrusion simulation experiment simulated stratum comprises an extension simulation experiment simulated stratum and a co-deposited wet quartz sand layer (45) and a co-deposited wet clay layer (46) which are covered on the extension simulation experiment simulated stratum.
11. The method according to claim 10, characterized in that the protective layer (47) is a quartz sand protective layer, after laying the protective layer (47), pouring the test box (1) with a watering can, the watering can opening being evenly sprayed at a distance of 15+ -3 cm from the top of the test material until the entire test material is saturated.

Description

Experimental device and method integrating inversion construction and fluid migration Technical Field The invention relates to an experimental device integrating a reverse structure and fluid migration, and belongs to the field of geological structure simulation and structure control and storage professions. Background The research of the geological structure has important significance for the research and understanding of plate slippage, fault impact and fold formation. The evolution process of early extension and late extrusion leads to the development of complex structures, most positive faults of early extension development are reversed in the late extrusion environment to become main control fractures affecting the deposition thickness and the structural form, so the reversed faults have important effects on migration, enrichment and preservation of oil gas. The experimental device integrating the reverse structure and the fluid migration is built, the experimental device has important significance in restraining and guiding the research on the oil gas control effect of the reverse structure, and the analysis of the control mechanism of the reverse fault development in the early-stage forward fault to the later-stage extrusion environment can be performed. The physical simulation experiment can be assisted in researching reverse structural evolution and oil and gas reservoir processes. The physical simulation experiment is to recover the evolution process of the structure by controlling the deformation factors of the structure by utilizing the similarity principle. Multiple layers of quartz sand are typically deployed in a laboratory to simulate a formation, and then the ends of the simulated formation are squeezed or stretched. Analysis of formation evolution and formation cause is performed by recording and processing the migration of each layer of silica sand. Most of the existing physical simulation instruments are simulation devices of a single power system, only extension or extrusion simulation experiments can be completed, and the simulation is concentrated on a structural deformation stage, and the simulation of fluid migration and the influence of preexisting fracture in a reverse structure are not concerned. Disclosure of Invention Aiming at the technical problems in the prior art, the invention provides an experimental device and method for integrating a reverse structure and fluid migration, which can simulate the deformation process of an extrusion structure on the basis of the stretching simulation result of uniform stress transmission, and complete the fluid migration simulation under the condition of not damaging an elastic polymer used in the stretching simulation experiment, thereby effectively combining the reverse structure simulation of stretching before extrusion with the fluid migration simulation. The invention provides an experimental device integrating a reversing structure and fluid migration, which comprises: the experimental box is a rectangular box body, and an experimental model for simulating a stratum structure is arranged in the experimental box; a push-pull power mechanism connected with the experiment box and pushing and pulling the experiment model in the experiment box to stretch or squeeze the simulated stratum, and A fluid injection mechanism that laterally injects a staining fluid from the experimental model; the push-pull power mechanism stretches and then extrudes the experimental model so as to simulate formation inversion structural deformation, the fluid injection mechanism injects dyeing fluid into the experimental model, and fluid migration simulation experiments are carried out on the basis of inversion structural deformation. The invention is further improved in that the experiment box comprises an experiment platform at the bottom, and transparent baffles are arranged on the edges of the two sides and the rear side of the experiment platform; the front side of the experiment platform is provided with a double-layer push-pull structure connected with a push-pull power mechanism. The push-pull power mechanism comprises a power electric cylinder, wherein a push rod connected with the double-layer push-pull structure is arranged on the power electric cylinder, and the push rod stretches or contracts under the action of the power electric cylinder. The invention further improves that the double-layer push-pull structure comprises a stretching push plate close to one side of the power electric cylinder and an extrusion push plate far away from one side of the power electric cylinder, wherein a through hole is formed in the stretching push plate; The push rod passes through the through hole, and the front end of the push rod is provided with a push plate which is arranged between the stretching push plate and the extrusion push plate. The invention is further improved in that the extrusion pushing plate is provided with a pushing plate groove, and the pushin