BURIED HYDROPHONE WITH SOLID OR SEMI-RIGID COUPLING

摘要

According to an embodiment, a seismic receiver device is described for use in a borehole surrounded by an ambient material, e.g., rock, mud, etc. The seismic receiver device includes a pressure wave measuring device which is configured to sense pressure changes associated with received seismic waves, a coating layer disposed on the pressure wave measuring device, and an outer layer disposed on the coating layer which is made of a material that is selected to have a bulk modulus number that is substantially similar to a bulk modulus number of the ambient medium. In this way, the acoustic impedance of the device is better matched to the ambient material so that more accurate seismic acquisition may be performed.

主权项

1. A land seismic system comprising:
at least one buried receiver device surrounded by an ambient material and configured to receive the seismic waves, the receiver device including:
a pressure wave measuring device which is configured to sense pressure changes associated with received seismic waves and to convert the pressure changes into corresponding electric signal, wherein the pressure wave measuring device includes a hollow sphere transducer formed of a piezoelectric material;a coating layer disposed on the said hollow sphere transducer and configured to substantially hermetically seal said hollow sphere transducer; andan outer layer disposed on said coating layer which is made of a material that is selected to acoustically match said ambient medium in which the receiver device is intended to operate, such that a bulk modulus number associated with the material is substantially similar to a bulk modulus number of the ambient medium.