Visual micro-pore structure simulation physical model and manufacturing method thereof

Abstract

The invention mainly belongs to the technical field of oil and gas field microcosmic mechanism research and particularly relates to a visual micro-pore structure simulation physical model and a manufacturing method thereof. The simulation physical model comprises a primary board and a secondary board. The secondary board comprises an injection port and a recovery port. The primary board is formed by mixing epoxy resin and a curing agent. The secondary board is formed by processing planar optical glass. The primary board comprises a pore network structure which is composed of three parts. The front ends of the three parts of the pore network structure are connected with the injection port through a common throat, and the tail ends of the three parts of the pore network structures are connected with the recovery port through a common throat. By means of the method, the throat diameter, any throat-to-pore ratio and various coordination numbers under micrometer size can be achieved, and the manufactured physical model is good in transparency, high in visualization and low in manufacturing cost.

Description

technical field [0001] The invention mainly belongs to the technical field of oil and gas field microcosmic mechanism research, and in particular relates to a visualized microcosmic pore structure simulation physical model and a manufacturing method. Background technique [0002] In recent years, due to the rapid development of medium- and high-permeability oilfields and the slowdown in the increase in proven reserves, the oil production of low-permeability and ultra-low-permeability reservoirs will become more and more important in reservoir engineering, and the development of low-permeability reservoirs will have important strategic significance. Therefore, the study of fluid seepage in porous media is of great significance for the development of underground fluid resources such as oil and gas, surface engineering and anti-seepage of river dams. However, for a long time, the research on the seepage problem in the microscopic model mainly includes: ① Taking artificial core...

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Problems solved by technology

However, for a long time, the research on the seepage problem in the microscopic model mainly includes: ① Taking artificial core or artificial geological model as the research object, the cost is low, the processing is relatively simple, but the error is large, and the flow of oil, gas, water and other fluids cannot be observed. The driving process cannot meet the needs of current oilfield development; ②The existing porous media models, such as microcapillary network models, quartz sand interlayer models, simulated pore structure models, and models using real cores as the main body, are transparent and can simulate displacement The process is visible, and images can be collected and analyzed, but the production methods are complicated, the production cost is high, the production accuracy is poor, and the size of the pore network structure is uncontrollable; ③ For the existing porous media model made of epoxy resin bonding, the production The resulting model has good transparency, strong visibility, and can clearly observe the microscopic seepage process in the model, but the model has poor manufacturing accuracy, uncontrollable size, poor bonding ability, no pressure resistance, low success rate, and cannot reach low\ The micron-scale pore size requirements of ultra-low permeability oilfields cannot meet the research on microscopic parameters of reservoirs

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