Reverse vertical seismic profile seismic prospecting explosive source

Abstract

The invention relates to a reverse vertical seismic profile seismic prospecting explosive source, composed of a safety mechanism body, a piston-type detonator seat, a pressure spring, a detonator, a rubber protector, a detonating primer device, a reducer union, a detonating fuse device shell, cushioning material, a primary explosive grain, main blasting charge and a centering device. The safety mechanism body is internally provided with the piston-type detonator seat and the rubber protector, the piston-type detonator seat is internally provided with the detonator and the pressure spring, the lower end of the safety mechanism body is connected with the reducer union and is also connected with the shell and the detonating fuse device which are filled with the cushioning material as well as the primary explosive grain. All joints are sealed by adopting high temperature sealing elements. The invention adopts brittle metal material shell, tyrannical high density high temperature resistant explosive is placed in the shell, the explosive amount thereof can be adjusted in a increasing or reducing way according to the energy requirement of prospecting, and energy of explosion can be transmitted to ground surface by virtue of oil well casing and well cementation sheath, so as to be received.

Description

technical field [0001] The invention relates to a petroleum geological prospecting technology, in particular to an explosive seismic source for seismic prospecting by the reverse vertical seismic profile method which can be used for safe excitation in an oil well with casing and cement sheath and received on the surface. technical background [0002] At present, the seismic sources generally used in cross-well seismic mainly include land-use electric splash seismic source and heavy hammer impact underground seismic source. Such as Chinese patent 01233188 land use electric spark seismic source, it is a kind of electric energy seismic source, utilizes capacitor to add the stored electric energy on the electrode that is placed in water in advance, because discharge effect produces spark, causes vibration. Chinese patent 200520104279.4 interwell seismic spark source uses mechanical effects to generate single pulse energy as a seismic source for seismic exploration. In addition,...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of reverse vertical seismic section method seismic exploration explosive seismic source, overcome the defects such as weak excitation energy in the existing seismic source, increase the excitation energy, and make the reverse vertical seismic section method seismic exploration become a reality

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