Physical model experimental device for measuring planar radial flow displacement pressure gradient

Abstract

The invention relates to a physical model experimental device for measuring the planar radial flow displacement pressure gradient. The physical model experimental device is characterized in that the physical model experimental device is a detachable disc-shaped device and comprises a disc-shaped sand filling container, a flat plate with a pressure measuring points, and a fastening plate; the flatplate with the pressure measuring points is arranged at the upper part of the disc-shaped sand filling container, and the fastening plate is arranged at the lower part of the disc-shaped sand fillingcontainer; fastening bolts penetrate through the peripheral areas of the flat plate with the pressure measuring points and the fastening plate so as to seal the disc-shaped sand filling container in the peripheral areas in a fastened mode; one injection point or four extraction points are arranged on the flat plate with the pressure measuring points; the injection points are arranged at the centerof the flat plate, and the extraction points are symmetrically distributed at the periphery of the flat plate; the flat plate with the pressure measuring points is provided with the multiple pressuremeasuring points; and the pressure measuring pointss are arranged in spiral and uneven modes along a flow line from the injection points to the extraction points.

Description

technical field [0001] The invention relates to a physical model experiment device for measuring the displacement pressure gradient of plane radial flow. Background technique [0002] A large number of water flooding experiments have proved that the efficiency of water flooding is affected by external dynamic conditions such as injection ratio and displacement pressure gradient. Domestic oilfields generally have a water cut above 90%, and high injection multiples often lead to ineffective circulation of injected water, resulting in low oil displacement efficiency and uneconomical. Under the general situation of low international oil prices, water plugging and profile control operations aimed at increasing the displacement pressure gradient are favored by more and more oilfield companies as a low-cost and efficient means of controlling water and stabilizing oil production. It is self-evident that the understanding of the displacement pressure distribution of the formation is...

AI Technical Summary

Problems solved by technology

At present, the routine experiments for the study of formation pressure in the laboratory include core displacement experiments and visual plate experiments, and there is no experimental device specially used to study the distribution of plane displacement pressure gradients.

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