Acoustic system module of acoustic logging while drilling

Abstract

The invention provides an acoustic system module of acoustic logging while drilling. The acoustic system module is composed of a base and a transducer. The base comprises a module frame body, a data line interface and a rubber support component, wherein the module frame body is in a cubic structure, the frame body portion of the module frame body is provided with an outer lateral surface and two blank surfaces of concave space, and the two blank surfaces are a drill collar surface and a transducer mounting surface; and the concave space at the center of the module frame body is set as transducer accommodating space. The transducer is arranged in the transducer accommodating space. The data line interface is opened on the lateral surface of the module frame body and is used for mounting a wiring terminal connected with the transducer. The rubber support component is arranged on the outer lateral surface of the module frame body and used for supporting and being connected with the module frame body and the drill collar. Non-metallic soft materials are connected between the acoustic system module and the drill collar, accordingly, effects of acoustic wave interfering are eliminated structurally, and interfering energy transfer between the transducer and the drill collar is cut off.

Description

technical field [0001] The invention relates to the field of applied geophysics, in particular to an acoustic system module for acoustic logging while drilling. Background technique [0002] Compared with wireline logging, acoustic logging while drilling is less affected by the invasion of drilling filtrate, and can measure and record the geophysical parameters in the original state in real time after drilling into the target layer, and can more effectively detect the lithology, Physical properties and reservoir parameters; acoustic time difference can be extracted in real time downhole, providing more comprehensive data support for drilling construction and reservoir evaluation, improving drilling efficiency, reducing drilling costs, optimizing drilling operations, and improving drilling safety; in horizontal wells and large wells Timely understanding of well conditions in deviated wells can replace wireline logging in complex wells where it is difficult to use wireline log...

AI Technical Summary

Problems solved by technology

In the process of acoustic logging while drilling, the drill collar of the metal structure is required to have a high strength. In the wireline logging, the insulation of the direct wave propagating along the casing is attenuated by cutting slots on the metal casing or using a special sound-insulating body nipple. Acoustic measures are difficult to implement in acoustic logging while drilling, and the sound insulation problem of drill collars brings great challenges to acoustic logging while drilling

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