Multistage pulses enhanced perforation equpment in use for oil and gas well

Abstract

The present invention discloses a multi-stage pulse synergistic perforating system for oil-gas well. Said system is characterized by that on the basis of adopting detonator for resisting sand impact and synergistic perforating gun said invention utilizes synergistic gun tail, connecting component and threaded connecting component to make second-stage synergistic gunpowder with higher combustion velocity and third-stage synergistic gunpowder with lower combustion velocity be added into the construction pipe string, and the adopted partition board time-delay fire lighter can light the next-stagesynergistic gunpowder after a period of time after the last-stage perforating gun is perforated so as to form several gunpowder pressure pulses to fracture formation and make the fracture be continuously extended. Besides, the proppants in two synergistic gunpowders can be fed into the formation fracture together with high-temperature high-pressure gas so as to prevent the formation fracture frombeing closed.

Description

technical field [0001] The invention belongs to the field of perforating operations of oil and gas wells, and mainly relates to a perforating device for exploiting oil and gas, in particular to a perforating device integrating deep penetration synergistic perforation, high-energy gas fracturing and hydraulic fracturing . Background technique [0002] In order to increase the production of oil and gas wells, many methods have been adopted in actual production. In the early 1990s, my country introduced the high-energy gas fracturing technology from the former Soviet Union, and later, the synergistic perforation technology developed in my country. These two technologies have their own advantages. High-energy gas fracturing is to use high-energy gas fracturing bombs to fracturing the formation after perforation, in order to achieve the purpose of eliminating the perforation compaction zone and communicating formation fractures. But this technology is carried out after some tim...

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Problems solved by technology

But this technology is carried out after some time after perforation, and this can delay the valuable time of a large amount of oil exploitations, and the second construction that carries out also can take considerable manpower and material resources, so does not obtain a large amount of popularization; The perforating technology is to load a certain amount of gunpowder in the perforating gun. While perforating, the perforating bullet ignites the gunpowder, and the high-energy gas generated by the gunpowder performs fracturing. It compensates for the deep penetration perforation and high-energy gas pressure. split single function

However, this technology has certain shortcomings, that is, the space in the perforating gun is limited, and the amount of gunpowder installed is limited, that is, the effect of fracturing is limited. If the amount of charge in the perforating gun is large, under the existing conditions, the There will be a problem of blowing up the gun, causing serious quality problems

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