Water-seal effect measuring and control device of water-seal underground oil storage cavern

Abstract

The invention discloses a water-seal effect measuring and control device of a water-seal underground oil storage cavern, and the device comprises a data acquisition instrument and a drilled hole which is formed above the arch-shaped top of the oil storage cavern; the bottom of the drilled hole is a 50mm to 100mm distance from the arch-shaped top of the cavern; the drilled hole is provided with device layers embedded with saturated osmometer components and unsaturated pressure testing sensors every 3m to 5m upwards from the bottom, and the adjacent device layers are blocked by a micro expansion low-permeability material; the saturated osmometer components and the unsaturated pressure testing sensors are respectively connected with the data acquisition instrument through respective leads which penetrate through the micro expansion low-permeability materials; and the data acquisition instrument sends a measuring signal to a computer of a monitoring center through a data sending unit. According to the water-seal effect measuring and control device of the water-seal underground oil storage cavern, the design is reasonable, the structure is simple, the operation is convenient, and the reliability is high.

Description

technical field [0001] The invention relates to a water sealing effect measurement and control device, in particular to a water sealing effect measurement and control device for underground oil storage caverns. Background technique [0002] Under the existing technical conditions, there are two methods for measuring the pressure of the water body above the underground water-sealed oil depot: one is to measure the water level in the borehole with a level gauge and convert it into hydrostatic pressure; the other is to directly obtain the pressure of the rock mass by embedding a piezometer The water pressure method in . These two methods are only suitable for monitoring the water pressure in rock mass in saturated state; when the fractured rock mass is in unsaturated state, the above two methods are not applicable. Water-sealed underground oil storage caverns are not allowed to appear in the unsaturated state area during the construction period or the operation period, so it i...

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Problems solved by technology

Water-sealed underground oil storage caverns are not allowed to appear in the unsaturated state area during the construction period or the operation period, so it is particularly necessary to measure the unsaturated area in the rock mass; It will lead to two groundwater levels above the cavern. In this case, the thickness of the water body calculated by the pressure of the piezometer is not true, so the water sealing effect cannot be correctly judged.

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