Device and method for supercritical carbon dioxide high-pressure jet flow plug removal seepage enhancement
A carbon dioxide, high-pressure jet technology, applied in the fields of fluid production, earth-moving drilling, wellbore/well components, etc., can solve the problems of complex equipment, unpredictable pressure, high fracture initiation pressure in hard formations, and achieve high energy utilization, increase The effect of large porosity and low surface tension
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[0015] The main structure of the supercritical carbon dioxide high-pressure jet block removal and permeability enhancement device involved in this embodiment includes tubing 1, casing 2, packer 3, detonator 4, propellant 5, piston 6, cylinder liner 7, and diversion joint 8. And nozzle 9; casing 2 is sleeved on the outside of tubing 1 to form upper and lower passages. Packers 3 are evenly arranged in the upper and lower passages between casing 2 and tubing 1. The number of packers 3 is set according to actual needs The detonator 4 is arranged in the oil pipe 1 and connected to the oil pipe 1. The detonator 4 adopts a commercially available wireless or wired detonator; the detonator 4 is provided with a piston 6, and a cavity formed between the piston 6 and the detonator 4 The lower end of the piston 6 is filled with a propellant 5; the lower end of the piston 6 is made with a cylinder liner 7 filled with supercritical carbon dioxide, and the piston 6 moves downw...
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