A rock pressurized imbibition device

Abstract

The invention relates to a rock pressure filtration absorption device which is characterized by comprising a pressure device, a power supply system, a base and a shell arranged on the base, wherein the pressure device comprises an oil pump arranged on the base; the oil pump is connected with a plurality of hydraulic cylinders arranged at two ends and on side walls of the shell at intervals through pipelines; a push rod is arranged on each hydraulic cylinder; the hydraulic cylinders positioned on the side walls of the shell are connected with annular claws used for fixing columnar rock cylinders through the push rods; the annular claws are arranged inside the shell; the hydraulic cylinders positioned at two ends of the shell are respectively connected with pressing plates used for fixing two ends of the columnar rock through the push rods; the power supply system comprises a filtration absorption net and a plurality of water inlet pipes; the annular claws and the inner walls of the pressing plates are respectively connected with the tail ends of the water inlet pipes; and the filtration absorption net is arranged on the inner side of the annular claws.

Description

technical field [0001] The invention relates to a rock pressure imbibition device. Background technique [0002] Imbibition is a process in which a porous medium spontaneously absorbs a wetting phase fluid and simultaneously displaces a non-wetting phase fluid. In recent years, due to the increasing demand for energy and the decreasing recoverable reserves of conventional oil and gas resources, one of the main development targets in the future is low-permeability reservoirs. There are fracture systems in low-permeability reservoirs. Due to imbibition, water can replace and displace crude oil in the matrix block into the fracture system. It can be said that imbibition determines the productivity of such reservoirs. Therefore, in the experimental Formation imbibition under simulated formation conditions in the laboratory has very important guiding significance for improving the recovery of low-permeability reservoirs. [0003] At present, the test condition of the imbibition...

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Problems solved by technology

[0003] At present, the test condition of the imbibition dynamic measurement device is usually normal pressure, and it is difficult to change the stress in all directions

However, for actual reservoirs, since the capillary pressure-dominated imbibition flooding environment is a high-pressure environment, the capillary pressure will change in different directions. Therefore, the results obtained by these imbibition dynamic measurement devices cannot truly reflect the actual reservoir. imbibition dynamics

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