Geoquest Systems

Systems and methods for direct arrival estimation for marine seismic data are provided. A computer-implemented method for estimating direct-arrival energy in seismic data acquired in a marine environment, the method including: executing, by one or more processors, operations on seismic data that contain up-going and down-going wavefields in which direct-arrival information is not properly or completely recorded, processing the seismic data using a computer-based wavefield-analysis technique to identify water-layer reverberation events within the up-going and down-going wavefields, leveraging, through computer-implemented analysis, stable relationships among water-layer reverberations, computing, by the processors, an estimated direct-arrival signal based on the identified relationships to compensate for missing or improperly recorded direct-arrival information, and producing, using the processors, a direct-arrival estimate configured for use in subsequent seismic-processing operations.

A first velocity model having a three-dimensional (3D) grid of voxels containing velocity values is processed with an eikonal solver to generate a reference travel-time model as a second 3D grid of voxels containing respective reference travel-time values. A candidate background model is initialized based on the first velocity model. A candidate travel-time model is generated from the candidate background model. The candidate travel-time model has a third 3D grid of voxels containing respective candidate travel-time values. The candidate background model is updated to minimize a measure of difference between respective candidate travel-time values of the candidate travel-time model and respective reference travel-time values of the reference travel-time model. The updated candidate model serves as a second velocity model of the subsurface region that is kinematically equivalent to the first velocity model.

A method implements automation of product carbon footprint computations. A process map view is displayed, including multiple process nodes and product nodes. A process view is displayed for a process model associated with one of the process nodes. The process map view is updated with a footprint node that is connected to one or more process nodes. A set of process models, including the selected process model, is processed using footprint data from the footprint node to calculate process emissions. The process map view is updated to display the calculated emissions for the connected process nodes. The process emissions are further processed to determine an overall emission value. A dashboard view is displayed showing the emission value for a product represented by a product node.

A method for improving subsurface images includes receiving data from at least one source and one receiver disposed at a subsurface location. The method may include representing the subsurface location with a dense grid of point scatterers, calculating a wavefield of the source based on the position of the source within the subsurface location, calculating a wavefield of the receiver based on the position of the receiver within the subsurface location and on the grid of point scatterers, and forming an unweighted image of point spread functions (PSFs). The method may also include forming a weighted image of PSFs. The method may also include calculating an image of the weight based on the weighted image of PSFs and the unweighted image of PSFs, and generating a partitioned image of PSFs based on the image of the weight, thereby preventing PSFs from overlapping and improving images of the subsurface location.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

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