Disclosed is a geophysical data acquisition system. The system comprises a frame assembly; a set of ground engaging members connected to the frame assembly, and adapted to move the frame assembly along the ground surface; and a carrier assembly carried by the frame assembly, the carrier assembly having one or more seismic source subsystems and a drive mechanism adapted to move each of the one or more seismic source subsystems through a plurality of positions between a lowered position and a raised position and forward and rearward positions with respect to the frame assembly. The movement of each of the one or more seismic source subsystems being in coordination with the movement of the frame assembly, such that each of the one or more seismic source subsystems move to the lowered position when the frame assembly approaches one or more data acquisition points on the ground surface.

Seismic exploration system based on an underwater mobile platform including: an add-on type electronic cabin, a circuit integration device, an underwater mobile platform, a mounting mechanism, a multi-electrode emission array, and a multi-channel hydrophone linear array; where the electronic cabin is externally fixed on the underwater mobile platform through the mounting mechanism, the circuit integration device is disposed in the electronic cabin, the circuit integration device is connected with the multi-electrode emission array, and the multi-electrode emission array is connected with the multi-channel hydrophone linear array; and the circuit integration device includes a multi-channel underwater acoustic data acquisition device, a sound source host, a photoelectric junction box and a battery pack, where the acoustic data acquisition device is connected with the sound source host, and the photoelectric junction box is connected with the acoustic data acquisition device, the sound source host, the battery pack, and the multi-electrode emission array, respectively.

Seismic exploration system based on an underwater mobile platform including: an add-on type electronic cabin, a circuit integration device, an underwater mobile platform, a mounting mechanism, a multi-electrode emission array, and a multi-channel hydrophone linear array; where the electronic cabin is externally fixed on the underwater mobile platform through the mounting mechanism, the circuit integration device is disposed in the electronic cabin, the circuit integration device is connected with the multi-electrode emission array, and the multi-electrode emission array is connected with the multi-channel hydrophone linear array; and the circuit integration device includes a multi-channel underwater acoustic data acquisition device, a sound source host, a photoelectric junction box and a battery pack, where the acoustic data acquisition device is connected with the sound source host, and the photoelectric junction box is connected with the acoustic data acquisition device, the sound source host, the battery pack, and the multi-electrode emission array, respectively.

A method for actuating plural sets of vibratory seismic sources. The method includes calculating, at a controller, a continuous signal C.sub.n that is made as a periodic repetition of a template p.sub.n, wherein the template p.sub.n includes a swept-frequency signal; receiving a subset duration time L.sub.sub; receiving a tapering function W having a time length of L.sub.sub; receiving a calendar time t.sub.sweep; computing, at the controller, a product S.sub.n of a subset of the continuous signal C.sub.n and the tapering function W, wherein the subset of the continuous signal C.sub.n starts at the calendar time t.sub.sweep and lasts for the duration time L.sub.sub; and actuating a set n of the plural sets of vibratory sources at the calendar time t.sub.sweep, wherein each vibratory source of the set n of vibratory sources is actuated based on the product S.sub.n.

A method for actuating plural sets of vibratory seismic sources. The method includes calculating, at a controller, a continuous signal C.sub.n that is made as a periodic repetition of a template p.sub.n, wherein the template p.sub.n includes a swept-frequency signal; receiving a subset duration time L.sub.sub; receiving a tapering function W having a time length of L.sub.sub; receiving a calendar time t.sub.sweep; computing, at the controller, a product S.sub.n of a subset of the continuous signal C.sub.n and the tapering function W, wherein the subset of the continuous signal C.sub.n starts at the calendar time t.sub.sweep and lasts for the duration time L.sub.sub; and actuating a set n of the plural sets of vibratory sources at the calendar time t.sub.sweep, wherein each vibratory source of the set n of vibratory sources is actuated based on the product S.sub.n.

A monopole acoustic logging while drilling instrument used together with a bottom hole assembly and a method for measuring a shear wave velocity of slow formations, wherein the bottom hole assembly includes a drill collar and a drill bit, wherein the monopole acoustic logging while drilling instrument is installed on the drill collar. The monopole acoustic logging while drilling instrument comprises: an acoustic receiver array installed on the drill collar; a monopole acoustic source arranged at the drill collar, wherein the monopole acoustic source is configured to emit acoustic waves with a frequency in a preset frequency range, and the ratio of the outer diameter D1 of the drill collar to the outer diameter D2 of the drill bit is d, and 0.75<d<1.

Embodiments herein use an acquisition vessel towing a plurality of receivers and a seismic source and a source vessel towing a seismic source to acquire seismic data corresponding to a subsurface below a bottom surface of a body of water. When activating the seismic source on the acquisition vessel, the plurality of receivers acquire survey data for a central coverage area underneath a swath defined by the plurality of receivers. However, when activating the seismic source on the source vessel, the plurality of receivers acquires survey data for a side coverage area. The embodiments herein control a separation distance between the acquisition and source vessels so that there is a gap between the central and side coverage areas resulting from activating the seismic sources towed by those vessels. This gap can reduce the cost and time required to perform the seismic survey.

Embodiments herein use an acquisition vessel towing a plurality of receivers and a seismic source and a source vessel towing a seismic source to acquire seismic data corresponding to a subsurface below a bottom surface of a body of water. When activating the seismic source on the acquisition vessel, the plurality of receivers acquire survey data for a central coverage area underneath a swath defined by the plurality of receivers. However, when activating the seismic source on the source vessel, the plurality of receivers acquires survey data for a side coverage area. The embodiments herein control a separation distance between the acquisition and source vessels so that there is a gap between the central and side coverage areas resulting from activating the seismic sources towed by those vessels. This gap can reduce the cost and time required to perform the seismic survey.

A seismic source apparatus, configured to be maneuvered by a vehicle over terrain.

The present disclosure is directed to loading a helical conveyor for underwater seismic exploration. The system includes a case and a first conveyor having a helix structure provided within the case to support one or more ocean bottom seismometer (OBS) units. The case can include a first opening at a first end of the first conveyor and a second opening at a second end of the first conveyor. The system can include a base to receive at least a portion of the case. The system can include a second conveyor positioned external to the case that can move an OBS unit into the first opening at the first end of the first conveyor. The first conveyor can receive the OBS unit and direct the OBS unit towards the second opening at the second end of the first conveyor.