Temporary plugging ball impact and polishing testing device and method for shale gas horizontal well fracturing

Abstract

The invention discloses a temporary plugging ball impact and polishing testing device for shale gas horizontal well fracturing. The device comprises a circulating pump, a liquid tank, a sensor and animpact and polishing test part, the impact and polishing test part comprises a ball throwing vertical pipe, a plugging ball backflow vertical pipe, an acceleration impact short section, a spiral polishing oil pipe and a solid capture blocking short joint. The plugging ball backflow vertical pipe is arranged on the downstream of the ball throwing vertical pipe, the two ends of the plugging ball backflow vertical pipe are connected with an inlet of the acceleration impact short section and the solid capture blocking short section respectively, and an outlet of the solid capture blocking short section is communicated with the liquid tank. According to the invention, the impact and polishing testing device is designed; the influence of equipment and a manifold on the temporary plugging ball issimulated, meanwhile, a circulation experiment structure is designed, the long-time test requirement is met, deformation of the temporary plugging ball in the manifold can be effectively tested, andan indoor experiment basis is provided for obtaining material performance, optimizing pitching temporary plugging steering equipment and process and improving fracturing efficiency.

Description

technical field [0001] The invention relates to a temporary plugging ball impact grinding test device for shale gas horizontal well fracturing, belonging to the technical field of oil and gas field exploration and development. Background technique [0002] As a new energy source, shale gas plays an increasingly important role in my country's energy supply, and the development of shale gas has also received strong support from the state. In recent years, the shale gas development technology represented by Fuling around the Sichuan Basin in my country has become more and more perfect, and hydraulic fracturing has achieved remarkable results as a transformation measure. Temporary plugging balls are used to plug blastholes. Experiments have been carried out in normal pressure shale gas development and repeated fracturing of old wells. The temporary plugging balls enter the well bottom along the manifold along with the fracturing fluid. The temporary plugging balls are placed bet...

AI Technical Summary

Problems solved by technology

The size of the temporary plugging ball is small, and the gradation with the blast hole is strict. The traditional experiment did not test the impact and grinding effect of the manifold on the temporary plugging ball, so it is impossible to judge whether the temporary plugging ball is deformed when it reaches the bottom of the well; Although the size has changed, it is impossible to judge the influence ratio of the two factors of manifold wear and self-dissolution

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