Seismic data are obtained by recording simultaneously in seismic streamer, acquired by activating approximately simultaneously two or more seismic sources towed at two positions in the vicinity of seismic streamers. A residual is updated iteratively for an inversion solution for the activations of the two or more seismic sources. The iterative updating of the residuals utilizes a sequence of overlapping temporal windows containing reflection events and utilizes normal moveout corrections based on largest reflection events in each temporal window. A final updated residual is added to a final updated model result.

A method and system for positioning and correcting visual data by seafloor topographic profiles are provided. The method includes: offsetting the water-depth profile of the target survey line equidistantly in a grid layer of a target area to make profiles generated after the offsetting traverse the grid layer of the target area, and obtaining offset data sequences corresponding to the water-depth profile of the target survey line; drawing offset topographic profiles based on offset data of the offset data sequences corresponding to the water-depth profile of the target survey line; calculating a profile similarity between the water-depth profile of the target survey line and each of the offset topographic profiles by using a dynamic time warping (DTW) algorithm; and selecting a geographic location of one of the offset topographic profiles with a largest profile similarity as an actual geographic location of a water-depth profile of a seafloor visual survey line.

Disclosed are methods of marine 3D seismic data acquisition that do not require compensation for winds and currents.

A seabed object detection system is provided. The system can include a receiver array including streamers. The system can include a plurality of receivers coupled with the streamers. The system can include a receiver array cross-cable to couple with the first streamer and to couple with the second streamer. The receiver array cross-cable can be disposed at a first depth of a body of water. The system can include a first diverter and a second diverter coupled with the receiver array cross-cable. The system can include a source array including a first source and a second source. The source array can be coplanar to the receiver array. The system can include a source array cross-cable to couple with the first source and to couple with the second source, the source array cross-cable disposed at a second depth of the body of water.

Implementations for monitoring seismic data recorded in a marine survey of a subterranean formation for coverage gaps are described herein. Implementations include computing Fresnel sum operators for Fresnel zones of the subterranean formation based on a Kirchhoff migration impulse response at horizons of a representative plane layer model of a survey area of the subterranean formation. Implementations also include computing an acceptability map of the survey area based on the Fresnel sum operators. The acceptability map reveals coverage gaps in the survey area. Geoscientist may use the acceptability map to infill seismic data in areas of the survey area that correspond to the coverage gaps.

A method includes acquiring seismic data of a region that utilizes multiple seismic energy sources and seismic energy receivers where the seismic data include blended seismic data for a number of emissions from a corresponding number of the multiple seismic energy sources; determining spatially distributed coherent noise properties for the region using the blended seismic data; via the spatially distributed coherent noise properties, modeling coherent noise as at least two coherent noise models for at least two of the emissions from a corresponding at least two of the multiple seismic energy sources; via the coherent noise models, attenuating coherent noise in a portion of the blended seismic data to generate coherent noise attenuated blended seismic data; deblending the coherent noise attenuated blended seismic data to generate deblended seismic data; and rendering an image of at least a portion of the region to a display using the deblended seismic data.

A plurality of sensors and a controller are disposed in a marine seismic streamer. Each of the sensors comprises an enclosure having two opposing interior walls, first and second piezoelectric elements disposed on the opposing interior walls, a third piezoelectric element disposed on a flexible substrate within the enclosure between the opposing interior walls, a pressure signal output node and an acceleration signal output node disposed on the exterior surface of the enclosure. A combined pressure signal derived from the pressure signal output nodes of the plural sensors is coupled to a pressure signal input of the controller. A combined acceleration signal derived from the acceleration signal output nodes of the plural sensors is coupled to an acceleration signal input of the controller. The streamer may be towed, and the combined pressure and acceleration signals may be recorded in a computer-readable medium.

A method for seismic imaging includes receiving a multi-shot seismic data set that was collected using one or more streamers having recorders configured to detect seismic waves that propagate through a subterranean domain. The method also includes partitioning the multi-shot seismic data set into windows including a source dimension. The method also includes defining one or more first basis functions that describe the windows of the multi-shot seismic data set. The method also includes generating a model that describes a decomposition of the multi-shot seismic data set using the one or more first basis functions. The method also includes defining one or more second basis functions that describe a selected output data. The method also includes combining the one or more second basis functions with the model to produce a result for a source side wavefield and a receiver side wavefield.

The present embodiments describe a system and method for generating one or more predictive models to reduce the static interference present in seismic reflection studies. The system can include a user device and a server. The method proceeds with gathering historical data, generating synthetic data, generating a predictive model based on those data sets, and applying that model to a current set of a data to calculate a seismic reflection of a geological space.

Apparatuses, systems, and methods for data and/or power transfer to and from an ocean bottom seismic node are described. In an embodiment, an autonomous seismic node is configured with a bulkhead connector assembly that may be coupled to a plug assembly for data and/or power transfer and a pressure cap assembly when utilized subsea. A plurality of pins may be located on the bulkhead assembly in a substantially flat contact surface to obtain an external electrical connection to the node. The pins on the bulkhead assembly may form a flat circuit with an external device, such as a plug assembly or pressure cap assembly. One or more external devices may be coupled to the pressure cap assembly and/or bulkhead connector for increased functionality to the node. A quick release assembly and/or locking ring may be utilized to fasten any external device to the bulkhead connector assembly.