Multi-stage oriented logging wave detector device

Abstract

The invention relates to a multi-stage oriented logging wave detector device which is provided with a plurality of logging wave detector units, wherein each logging wave detector unit comprises a cylindrical main body, a tricomponent wave detector arranged on the cylindrical main body and a well wall pushing device; two ends of the logging wave detector units are connected with fixed shock absorption and insulation units, and interstage hard connecting rod assemblies are arranged between the shock absorption and insulation units; and the plurality of logging wave detector units, the shock absorption and insulation units and the interstage hard connecting rod assemblies are connected in series to form the multi-stage oriented logging wave detector device to realize the simultaneous receiving of multiple position points of the wave detector in a well. In a construction process, the number of stages can be increased and reduced according to a specific construction requirement. The devicehas the advantages of simple and reasonable structure, convenience of connection and disassembly, flexibility of stage control, accuracy of pushing position and capabilities of oriented construction and receiving as well as good interstage shock absorption and insulation function and is suitable for logging wave detection of petroleum seismic exploration, mining geology, constructional engineering, and the like.

Description

Technical field [0001] The invention relates to a geophone device for oil exploration, in particular to a multi-level directional logging geophone device suitable for small well diameters and capable of directional construction and reception. Background technique [0002] A lot of research and practice have shown that the low-speed zone on the surface absorbs high frequencies very seriously, so if the geophone can be placed below the low-speed zone to receive, it will reduce a lot of high-frequency absorption. Some foreign high-resolution construction teams use disposable downhole geophones. If the geophone is buried in a blast well with a depth of 15m for reception, one geophone is placed in each well. In the rolling forward construction process, the shot point is the past receiver point, and the receiver is no longer recovered. The improvement in profile quality obtained by this method is evident. [0003] In response to this situation, large-scale well logging equipmen...

AI Technical Summary

Problems solved by technology

With the in-depth research and practice of micro-logging vertical seismic section, this seismic observation method, this type of device still has the following limitations: (1) The main body of the single-stage logging detector determines that it can only be used during use. The main body is collected point by point according to a certain rule, and repeatedly pushes against, repeatedly excites the source, and repeatedly receives signals. The seismic signals received by multiple single-point excitations and single-point receptions cannot well reflect the objective situation of the region's geology; (2) Due to the soft lifting rope structure, the direction of the shear wave component geophone cannot be controlled in the well, and the shear wave component cannot always be ensured. Maintain a specific angle relationship with the source direction

Therefore, the final processed seismic data will not fully reflect the actual geological structure, and cannot accurately analyze the propagation and attenuation laws of the near-source wave field.

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