Visual crack type rock plate acid liquor etching experimental device and method

Abstract

The invention discloses a visual fracture type rock plate acid liquor etching experimental device and method. The experimental device comprises a visualization experiment unit, an acid supply unit, a pressure supply unit and a waste liquor collecting unit, the visualization experiment unit comprises a protection frame, a visualization rock plate cover, a visualization rubber sleeve, a sealing cover, a liquor inlet end opening and a liquor outlet end opening, the protection frame comprises a top plate, a bottom plate and two side plates arranged at the two ends of the top plate and the two ends of the bottom plate, the two side plates are provided with first mounting openings respectively, and a first water inlet is formed in the top plate. The visualization rock plate cover is inserted into the protection frame, a second water inlet is formed in the top of the visualization rock plate cover, the visualization rubber sleeve is inserted into the visualization rock plate cover, and annular space is reserved between the visualization rubber sleeve and the visualization rock plate cover. Sealing covers are arranged on first mounting openings in the two ends of the protection frame and seal the annular space. The acid supply unit is connected with a liquor inlet of the liquor inlet end opening, the pressure supply unit is connected with a second water inlet, and the waste liquor collecting unit is connected with a liquor outlet of the liquor outlet end opening.

Description

technical field [0001] The invention relates to the technical field of experimental equipment for oil and gas field development, and more specifically, relates to an experimental device and an experimental method for visual crack type slab acid etching. Background technique [0002] Hydraulic fracturing and acidizing of oil and gas wells are currently widely used reservoir stimulation measures for oil and gas reservoirs, especially artificial fractures are created by fracturing first, and then acidizing is performed to improve the seepage capacity of the formation. [0003] Acid liquid can enter fractures or pores to react with rocks, dissolve fracture walls or pore walls, expand fracture width, increase pore volume and improve fluid seepage conditions. Moreover, the acid solution can dissolve the blockages in the cracks or pores or destroy the structure of the blockages to disintegrate them, and then discharge the formation together with the residual acid to dredge the flow...

AI Technical Summary

Problems solved by technology

[0004] At present, most acidification researches on fractured reservoirs or artificially fractured re

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