Electric pulse enhanced pulsation hydraulic fracturing device and application method thereof

Abstract

The invention discloses an electric pulse enhanced pulsation hydraulic fracturing device. The device comprises a downhole hydraulic pulsation generating system and an electric pulse generating system;the downhole hydraulic pulsation generating system comprises a cylinder body, an opening is formed in the upper portion of the cylinder body, and a jet opening is formed in the side wall of the lowerportion of the cylinder body; the cylinder body is internally provided with a pressure bearing piston, pressure bearing springs, a pressure bearing plate and an electromagnetic switch assembly, the pressure bearing springs are arranged below the pressure bearing piston, a through hole is formed in the pressure bearing piston, and the pressure bearing plate is arranged in the through hole; the electric pulse generating system comprises electric pulse generators. Moreover, the invention also provides a method of applying the electric pulse enhanced pulsation hydraulic fracturing device. The device can achieve a water hammer effect with low frequency, large discharge capacity, high strength and strong impact force and is suitable for volume reconstruction engineering of coal reservoirs and other reservoirs, convenience is provided for the reservoirs to form high-density and complex fracture network structures, and the permeability of the reservoirs is improved.

Description

technical field [0001] The invention belongs to the technical field of hydraulic fracturing devices, and in particular relates to an electric pulse enhanced pulsating hydraulic fracturing device and an application method thereof. Background technique [0002] my country's coalbed methane resources have great potential and broad prospects for development. However, coal reservoirs are characterized by low porosity and low permeability, which restricts the large-scale commercial exploitation of coalbed methane. The traditional reservoir stimulation technique is hydraulic fracturing, which creates wide fractures in the coal seam. The single fracture structure makes the effect of hydraulic fracturing technology in some coalbed methane wells not obvious, and cannot greatly increase the production capacity of coalbed methane. The mismatch between the traditional reservoir stimulation technology and the special geological conditions of the coal seam has become a technical bottlene...

AI Technical Summary

Problems solved by technology

The current pulsating hydraulic fracturing technology is limited by the volume of the equipment, and cannot realize a single large-volume fracturing fluid injection. Therefore, the jet intensity is low and the impact force is small, and the long-distance reservoir fracture reconstruction is limited.

Images