A nodal seismic unit for acquiring seismic information includes an enclosure, a GPS receiver disposed in the enclosure; a motion sensor disposed in the enclosure; a LPWAN radio transceiver disposed in the enclosure; and a control unit disposed in the enclosure. The control unit is configured to transmit an unplanned movement signal to a remote operator using the LPWAN radio transceiver if the control unit receives a signal from the motion sensor indicative of an acceleration greater than a preset level. Additionally, he control unit may be configured to change an operating state of the nodal seismic unit in response to detecting a predetermined pattern of motion using the motion sensor.

Implementations described and claimed herein provide systems and methods for isolation detection. In one implementation, recorded data is obtained. The recorded data includes radial acoustic waves transmitted and received using a radial sensor of an acoustic logging tool deployed in a wellbore. Clockwise waves are separated from counterclockwise waves by converting the recorded data from a time domain to a frequency domain. The clockwise waves are shifted into shifted clockwise waves, and the counterclockwise waves are shifted into a shifted counterclockwise waves. A forward wave is generated by combining the shifted clockwise waves, and a reflected wave is generated by combining the shifted counterclockwise waves. One or more isolation regions are identified in the wellbore using the forward wave and the reflected wave.

Embodiments of the present invention provide a method and device for identifying microfacies of a limestone shoal. The method includes: establishing identification charts of different microfacies of a limestone shoal according to core and thin section data, constructing natural gamma-ray (GR) response templates of different microfacies of a limestone shoal of a standard drilled well, and standardizing a GR curve of a non-standard drilled well according to a GR curve of the limestone shoal of the standard drilled well; comparing the standardized GR curve of the non-standard drilled well with the GR response template of the standard drilled well to divide microfacies of a limestone shoal of the non-standard drilled well.

Implementations described and claimed herein provide systems and methods for isolation detection. In one implementation, an axial acoustic signal is obtained. The axial acoustic signal is captured using an axial sensor deployed in a structure in a subterranean surface. The axial acoustic signal is separated into a first wave region and a second wave region by applying velocity filtering. An axial symmetry of a portion of the structure is determined based on at least one of the first wave region or the second wave region.

Implementations described and claimed herein provide systems and methods for isolation detection. In one implementation, recorded data is obtained. The recorded data includes radial acoustic waves transmitted and received using a radial sensor of an acoustic logging tool deployed in a wellbore. Clockwise waves are separated from counterclockwise waves by converting the recorded data from a time domain to a frequency domain. The clockwise waves are shifted into shifted clockwise waves, and the counterclockwise waves are shifted into a shifted counterclockwise waves. A forward wave is generated by combining the shifted clockwise waves, and a reflected wave is generated by combining the shifted counterclockwise waves. One or more isolation regions are identified in the wellbore using the forward wave and the reflected wave.

A remote control system for a vibratory seismic source that generates seismic signals. The remote control system includes an attachment mechanism configured to be fixedly attached to a component of a vehicle carrier that carries the vibratory seismic source, and a remote control mechanism supported by the attachment mechanism, wherein the remote control mechanism includes first and second command units, each configured to control a baseplate associated with the vibratory seismic source. Each of the first and second command units are configured to be removed from the remote control mechanism while the attachment mechanism is hold in place.