Transparent parallel board device for researching fracture acidizing fluid viscous

Abstract

The invention relates to a transparent parallel plate device for researching the viscous fingering of fractured acidification fluid, which is utilized for the test and research for the viscous fingering of fractured acidification construction in an oil field. The transparent parallel plate is characterized in that the transparent parallel plate is composed of two transparent plates which are bonded at the four edges, and a stimulant slit with the width between 5 mm and 20 mm is formed between the two parallel plates. A pressure sensor is fixed on one side of the parallel plates. A release valve and an exhaust valve are fixed on the parallel plates, and an inlet and an outlet for testing fluid are arranged on the left end face and the right end face. The outlet of a pumping system is connected with the inlet of two intermediate containers. A piston or a diaphragm is arranged inside an intermediate container. The outlet of the intermediate container is connected with the inlet of a shunt. The outlet part of the shunt is connected with the inlet of the transparent plates. The outlet of the transparent plates is connected with a confluence device, and the outlet of the confluence device is connected with a back pressure regulator. The transparent parallel plate device has the advantages that the occasion and the degree of the appearance of the viscous fingering of the fractured acidification under the conditions of different viscosity differences, density differences and different discharge capacity can be observed and measured, so as to conduct relevant scientific research.

Description

technical field [0001] The invention relates to an indoor experimental device for studying oil and gas field reservoirs, in particular to a device for experimenting with the viscous fingering phenomenon between liquids that occurs in fracturing and acidizing fluids, specifically for the cracks formed in the formation of fracturing and acidizing fluids. Viscosity that may exist between different fluids refers to the device for testing and research. Background technique [0002] In the exploration and development of oil and gas reservoirs, especially low-permeability oil and gas layers, fracturing and acidizing technology is the main measure commonly used to stimulate reservoir production and injection. The viscous fingering of fracturing acidizing fluid is one of the main technologies to effectively stimulate the reservoir. The main process is to first inject high-viscosity, non-Newtonian fluid as the front fluid to generate fractures, viscous gel fluid to create fractures, a...

AI Technical Summary

Problems solved by technology

However, for fracturing and acidizing fluids, the fluids are all non-Newtonian fluids, and one non-Newtonian fluid involved in the viscous fingering process displaces another non-Newtonian fluid, and this unstable displacement process occurs In fractures, the fracture non-expansion geometry and the state of liquid flow are far from being simulated by the Hele-Shaw model and the pore model, and there are very few related studies and research equipment in the existing literature

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