High-energy pulse spinning plasma perforation method

Abstract

The invention belongs to the field of petroleum engineering, and particularly relates to a high-energy pulse spinning plasma perforation method. After an oil and gas well is drilled, a high-energy pulse spinning plasma drill bit and a whipstock are tripped in through a coiled tubing, after the coiled tubing reaches a specific stratum, the whipstock anchors a casing pipe, and the plasma drill bit deviates to one side of the casing pipe under the guiding effect of the whipstock; a ground control system sends out a control signal, and the plasma drill bit jets pulsed spinning plasma; the spinning plasma sequentially melts the casing pipe, annular cement and stratum rocks; in a plasma jet gap, high-pressure spinning airflow is jetted out of a plasma nozzle, and the high-pressure spinning airflow blows away molten substances in a plasma action area; and the spinning plasma is repeatedly jetted, and a high-seepage hole is gradually drilled in the side wall of a shaft. By means of the method, the large-diameter long-depth high-seepage hole can be drilled in the side wall of the shaft rapidly, the connectivity between the shaft and a reservoir is greatly improved, and the exploitation efficiency and the total yield of the oil and gas well are improved.

Description

technical field [0001] The invention belongs to the field of petroleum engineering, and in particular relates to a high-energy pulsed spin plasma perforation method. Background technique [0002] In the process of oil and gas exploitation, after the drilling of oil and gas wells is completed, it is necessary to use shaped perforating charges for perforating operations to open the channel between the wellbore and the reservoir, so that oil and gas resources can enter the wellbore through this channel, and then be mined to the ground . However, the existing perforating bullets have the following disadvantages: the depth of injection into the formation is limited, usually only 0.5-1.5m deep, and the diameter is 10-15mm, which cannot effectively penetrate the near-wellbore contamination zone; during the perforation process, there is pressure The real effect causes the permeability of the rock to decrease; the decrease of the permeability of the rock directly leads to the decrea...

AI Technical Summary

Problems solved by technology

However, the existing perforating bullets have the following disadvantages: the depth of injection into the formation is limited, usually only 0.5-1.5m deep, and the diameter is 10-15mm, which cannot effectively penetrate the near-wellbore contamination zone; during the perforation process, there is pressure The real effect causes the permeability of the rock to decrease; the decrease of the permeability of the rock directly leads to the decrease of the connectivity between the reservoir and the wellbore, which reduces the production and production efficiency of oil and gas wells; therefore, it is necessary to develop a new type of perforation technology to increase the connectivity between the reservoir and the wellbore. The connectivity of the wellbore improves the production efficiency of oil and gas wells

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