Embodiments relate to a sensor cable that may be reconfigurable to have various combinations of seismic sensors. An apparatus may comprise a sensor cable and seismic sensors distributed throughout a volume of the sensor cable and along all three axes of the sensor cable, wherein the seismic sensors are assigned to sampling groups that are reconfigurable and not hardwired.

A device and method used to increase the resolution when imaging, measuring and inspecting wells, pipes and objects located therein. The device comprises an array of acoustic transducers that both transmit and receive acoustic signals. Scan lines may be overlapped by interlacing transmission and receiving windows thus increasing either the resolution or logging speed drastically compared to conventional approaches. The sequence of the scan lines making up an imaging frame is created by stratifying physically close lines and randomly selecting from within each stratum, preventing interference from neighboring transducers, signals and acoustic artifacts that fundamentally limit logging speed and resolution using conventional methods.

A method includes receiving over a network from one or more seismic sensors a data set characterizing a seismic event generating a seismic wave. Based on the data set, a time of arrival and intensity of the seismic wave at a predetermined location is calculated. The predetermined location has one or more mitigation devices. Whether the intensity of the seismic wave exceeds a predetermined seismic intensity threshold is determined. If the intensity of the seismic wave exceeds the predetermined seismic intensity threshold, the one or more mitigation devices are activated.

The present disclosure is directed to a MEMS-based rotation sensor for use in seismic data acquisition and sensor units having same. The MEMS-based rotation sensor includes a substrate, an anchor disposed on the substrate and a proof mass coupled to the anchor via a plurality of flexural springs. The proof mass has a first electrode coupled to and extending therefrom. A second electrode is fixed to the substrate, and one of the first and second electrodes is configured to receive an actuation signal, and another of the first and second electrodes is configured to generate an electrical signal having an amplitude corresponding with a degree of angular movement of the first electrode relative to the second electrode. The MEMS-based rotation sensor further includes closed loop circuitry configured to receive the electrical signal and provide the actuation signal. Related methods for using the MEMS-based rotation sensor in seismic data acquisition are also described.

Multicomponent data are acquired using a downhole acoustic tool having transmitters and receiver stations distributed azimuthally in a plane perpendicular to the axis of the tool. The receiver stations are located at several receiving stations along the axis of the tool. At each acquisition depth, waveforms are processed through a multi-dimensional fast Fourier transform, extrapolation and inverse multi-dimensional fast Fourier transform. At each receiver station, waveforms are combined to produce the standard monopole waveforms and the inline and crossline dipole waveforms along fixed azimuths. These oriented waveforms produce a finer azimuthal sampling of the surrounding formation, and can then be used for imaging geological features within the surrounding formation.

A system is provided. The system includes a pedestal, a platform, and a sensor enclosure including a housing encompassing one or more sensors. The pedestal is a cuboid oriented in a vertical direction. The platform is a cuboid oriented in a horizontal direction. The sensor enclosure is positioned on a top of and in physical contact with the pedestal. The pedestal is positioned on a top of and in physical contact with the platform. The platform and the sensor enclosure are positioned at distal ends of the pedestal.

A seismic sensor is provided. The seismic sensor includes a housing, one or more detectors including a first detector tuned to vibrate when exposed to a first frequency, and the one or more microsensors associated with each of the one or more detectors. The one or more microsensors are configured to detect a vibration of the corresponding detector. The seismic sensor is configured to a) receive a signal at the first frequency, b) cause the first detector to vibrate in respond to the received signal at the first frequency, and c) transmit the received signal in response to detecting the first frequency.

A seismic sensor assembly can include a housing that defines a longitudinal axis; a sensor; sensor circuitry operatively coupled to the sensor; and overvoltage protection circuitry electrically coupled to the housing.

An apparatus for performing a seismic survey includes a data unit disposed in a housing, a flexible tether connected to the housing at a first end and having a second end, the tether including at least signal carrying wire and a tension conveying member, and an antenna connected to the second end of the tether, the data unit in signal communication with the antenna via the at least one signal carrying wire.

A method for deployment of a geophysical sensor includes moving a ram having a ground penetrating bit at a movable end thereof to a selected geodetic position. The ram and the ground penetrating bit are extended to create a hole in a ground surface while measuring extension of the ram. The ram is retracted, and if the measured extension of the ram indicates successful creation of the hole, then the geophysical sensor is moved to a position beneath the ram and the ram is extended to urge the geophysical sensor into the hole.