Downhole tools

Abstract

The invention discloses a borehole operation tool. The borehole operation tool comprises a frame, at least one perforating bullet and an acid liquor injection device; at least one through hole is formed in the frame, and any of the perforating bullets is arranged in the frame and corresponds to at least one through hole; and the acid liquor injection device is arranged in the frame and can be started under the condition that the temperature is higher than the preset temperature to guide acid liquor located in the acid liquor injection device out. According to the embodiment of the acid liquor injection device, through pulse power discharging, discharge-induced explosion occurs on metal wires in the perforating bullets, high-temperature high-pressure plasmas are generated, and accompanying with shock waves, energetic materials in the perforating bullets are detonated; and through the energy-gathered effect, a jet flow much larger than a traditional perforating appliance is generated. The acid liquor injection device acts under the high-heat effect generated during perforating, and the acid liquor is extruded into a hole canal; and through the acid-rock reaction, a compaction band on the surface of the hole canal is corroded, and the acid liquor permeates inwards a storing layer, and an acidic corrosion meshwork is formed so that the flow guiding capacity of near bore zones can be improved.

Description

technical field [0001] The invention relates to the technical field of oil and gas field well completion and reservoir reconstruction, in particular to a downhole operation tool. Background technique [0002] With the development of low-permeability, unconventional, shallow sea, and remote oil and gas fields, wells with special structures such as highly deviated wells, cluster wells, horizontal wells, and inclined-bed vertical wells continue to emerge. Most oil and gas wells need to be fractured, Reservoir stimulation measures such as acidizing put forward new requirements for traditional perforation technology. As a "bridge" between wellbore and reservoir, perforation technology should be fully combined with reservoir and actual well conditions in design and application, so as to create favorable conditions for later production and reconstruction measures. refer to figure 1 As shown, the perforating system may include a vehicle power supply 1 , a cable 2 , a cable control...

AI Technical Summary

Problems solved by technology

[0004] The main problems of the existing perforating technology are: (1) The traditional explosive shaped energy perforating charge technology is used, which uses chemical energy as the main energy for penetrating the casing, cement sheath and reservoir, and is limited by the amount of charge Due to factors such as structure size, perforating equipment, etc., the perforation hole diameter is small and the penetration depth is short (less than 2 meters), which affects the flow conductivity of the tunnel and the post-fracture effect; (2) the formation of shaped charges After the jet enters the rock formation, it has a strong compaction effect on the rocks around the pores and forms a compaction zone, which reduces the permeability of the reservoir, and the pores are blocked by shrapnel and debris, which affects the flow of oil and gas.

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