# Massimiliano Vassallo

## Massimiliano Vassallo, Brighton GB

Patent application number | Description | Published |
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20090067285 | 3D DEGHOSTING OF MULTICOMPONENT OR OVER / UNDER STREAMER RECORDINGS USING CROSS-LINE WAVENUMBER SPECTRA OF HYDROPHONE DATA - A technique includes obtaining pressure data that was acquired by seismic sensors towed as part of a three-dimensional spread of streamers and obtaining particle motion data, which are indicative of particle motion at locations of the sensors. The technique includes estimating cross-line spectra of the pressure data based at least in part on the pressure data, and the technique includes deghosting the particle motion data based at least in part on the estimated cross-line spectra. | 03-12-2009 |

20090296523 | JOINTLY INTERPOLATING AND DEGHOSTING SEISMIC DATA - A technique includes representing actual measurements of a seismic wavefield as combinations of an upgoing component of the seismic wavefield and ghost operators. Interpolated and deghosted components of the seismic wavefield are jointly determined based at least in part on the actual measurements and the representation. | 12-03-2009 |

20100211319 | RECONSTRUCTING SEISMIC WAVEFIELDS - A technique includes receiving seismic data acquired in a seismic survey in the vicinity of a reflecting interface. The survey has an associated undersampled direction. The technique includes providing second data indicative of discrete samples of incident and reflected components of a continuous seismic wavefield along the undersampled direction and relating the discrete samples to a linear combination of the continuous incident and reflected seismic wavefields using at least one linear filter. Based on the relationship, an unaliased representation of the linear combination of the continuous incident and reflected seismic wavefields is constructed. | 08-19-2010 |

20100211320 | RECONSTRUCTING A SEISMIC WAVEFIELD - A technique to reconstruct a seismic wavefield includes receiving datasets, where each dataset is indicative of samples of one of a plurality of measurements of a seismic wavefield that are associated with a seismic survey. The technique includes modeling the plurality of measurements of a seismic wavefield as being generated by the application of at least one linear filter to the seismic wavefield. The technique includes processing the datasets based on the linear filter(s) and a generalized matching pursuit technique to generate data indicative of a spatially continuous representation of the seismic wavefield. | 08-19-2010 |

20100211322 | INTERPOLATING A PRESSURE WAVEFIELD ALONG AN UNDERSAMPLED DIRECTION - A technique includes receiving seismic data acquired in a seismic survey. The survey has an associated undersampled direction, and the seismic data contains samples, which are indicative of a pressure wavefield and a directional derivative of the pressure wavefield that contains information related to vertical variations. The technique includes relating the samples to the pressure wavefield or to the directional derivative of the pressure wavefield using at least one linear filter and based on the relationship, constructing a substantially unaliased continuous representation of the pressure wavefield or the directional derivative of the pressure wavefield along the undersampled direction. | 08-19-2010 |

20110002192 | Jointly Interpolating and Deghosting Seismic Data - A technique includes representing actual measurements of a seismic wavefield as combinations of an upgoing component of the seismic wavefield and ghost operators. Interpolated and deghosted components of the seismic wavefield are jointly determined based at least in part on the actual measurements and the representation. | 01-06-2011 |

20110178714 | Deghosting and Interpolating Seismic Data - A technique includes receiving seismic data indicative of measurements acquired by seismic sensors. The measurements are associated with a measurement noise. The technique includes estimating at least one characteristic of the measurement noise and deghosting the seismic data based at least in part on the estimated characteristic(s) of the measurement noise. | 07-21-2011 |

20110182139 | INTERPOLATION AND DEGHOSTING OF SEISMIC DATA ACQUIRED IN THE PRESENCE OF A ROUGH SEA - A technique for processing seismic data acquired in a seismic survey conducted in the presence of a rough sea includes receiving a first dataset that is derived from data acquired by a first set of seismic sensors generally towed at a first depth in the seismic survey and receiving a second dataset that is derived from data acquired by a second set of seismic sensors generally towed at a second depth that is different than the first depth in the seismic survey. The first dataset is indicative of at least pressure measurements, and the second dataset is indicative of at least crossline particle motion measurements. The technique includes determining crossline particle motion measurements in the presence of a relatively flat sea surface based at least in part on the crossline measurements that are indicated by the second dataset and the pressure measurements that are indicated by the first dataset. | 07-28-2011 |

20120089337 | MATCHING PURSUIT-BASED APPARATUS AND TECHNIQUE TO CONSTRUCT A SEISMIC SIGNAL USING A PREDICTED ENERGY DISTRIBUTION - A technique includes processing seismic data indicative of samples of at least one measured seismic signal in a processor-based machine to, in an iterative process, determine basis functions, which represent a constructed seismic signal. The technique includes in each iteration of the iterative process, selecting another basis function of the plurality of basis functions. The selecting includes based at least in part on the samples and a current version of the constructed seismic signal, determining a cost function; and interpreting the cost function based at least in part on a predicted energy distribution of the constructed seismic signal to select the basis function. | 04-12-2012 |

20120140592 | 3D DEGHOSTING OF MULTICOMPONENT OR OVER/UNDER STREAMER RECORDINGS USING CROSS-LINE WAVENUMBER SPECTRA OF HYDROPHONE DATA - A technique includes obtaining pressure data that was acquired by seismic sensors towed as part of a three-dimensional spread of streamers and obtaining particle motion data, which are indicative of particle motion at locations of the sensors. The technique includes estimating cross-line spectra of the pressure data based at least in part on the pressure data, and the technique includes deghosting the particle motion data based at least in part on the estimated cross-line spectra. | 06-07-2012 |

20130080067 | DETERMINING ONE OR MORE TARGET POSITIONS IN AN ACQUISITION DOMAIN FOR PROCESSING SURVEY DATA - In response to at least one input criterion, one or more target positions in an acquisition domain are determined for processing of survey data, where the survey data is acquired by survey equipment in the acquisition domain having a first set of dimensions, and where the processing of the survey data is to be performed in a processing domain having a second set of dimensions different from the first set of dimensions. | 03-28-2013 |

20130128696 | NOISE REMOVAL FROM 3D SEISMIC REPRESENTATION - A method for removing noise from a three-dimensional representation of seismic data. The method includes receiving seismic data acquired in a seismic survey. The method may organize the acquired seismic data into a three-dimensional representation of the acquired seismic data. The method may then remove a noise from the three-dimensional representation of the acquired seismic data based on at least one criterion. | 05-23-2013 |

20130182536 | WAVEFIELD DEGHOSTING - A technique includes receiving sensor acquired data, which includes pressure data representative of at least one pressure measurement of a wavefield and particle motion data representative of at least one particle motion measurement of the wavefield. The technique includes filtering the pressure data and the particle motion data with a plurality of directional filters to provide a plurality of filtered datasets. The filtered datasets are associated with different directional ranges. The technique includes estimating an angle of incidence for at least one of the directional ranges based at least in part on at least one of the filtered datasets; and processing the acquired data to determine at least one of an upgoing component of the wavefield and a downgoing component of the wavefield based at least in part on the at least one estimated angle of incidence. | 07-18-2013 |

20130261980 | USING CROSSLINE MEASUREMENT DATA FOR AN ACTION RELATING TO SURVEY OF A TARGET STRUCTURE - Methods and systems for survey operations are provided. In some embodiments, crossline measurement data measured by at least one survey receiver is received. Based at least in part on a characteristic of the crossline measurement data, an option from among a plurality of candidate options is selected, where the selected option is for use in an action relating to survey of a target structure. | 10-03-2013 |

20140029378 | RECONSTRUCTING SEISMIC WAVEFIELDS - A technique includes receiving seismic data acquired in a seismic survey in the vicinity of a reflecting interface. The survey has an associated undersampled direction. The technique includes providing second data indicative of discrete samples of incident and reflected components of a continuous seismic wavefield along the undersampled direction and relating the discrete samples to a linear combination of the continuous incident and reflected seismic wavefields using at least one linear filter. Based on the relationship, an unaliased representation of the linear combination of the continuous incident and reflected seismic wavefields is constructed. | 01-30-2014 |

20140036626 | ESTIMATING AND USING SLOWNESS VECTOR ATTRIBUTES IN CONNECTION WITH A MULTI-COMPONENT SEISMIC GATHER - A technique includes determining at least one attribute of a slowness vector associated with a seismic gather based on pressure data and an indication of particle motion that is measured by at least one seismic sensor while in tow. | 02-06-2014 |

20140200820 | WAVEFIELD EXTRAPOLATION AND IMAGING USING SINGLE- OR MULTI-COMPONENT SEISMIC MEASUREMENTS - Described herein are architectures, platforms, computing systems, and methods for mitigating noise in wavefield extrapolation and imaging. In one aspect, a method of wavefield extrapolation is provided that includes receiving data representing at least one measurement of pressure wavefield or particle motion wavefield; modeling the received data as a sum of signal and noise; providing a noise model to components of the received data; and weighting the measured components of the received data to reduce the impact of noise of results of the wavefield extrapolation. | 07-17-2014 |

20140200854 | METHODS AND COMPUTING SYSTEMS FOR SURVEY DESIGN AND MODELING WORKFLOW FOR TOWED MULTIMEASUREMENT SEISMIC STREAMER DATA - Modular workflows for determining acquisition geometry and efficiency using 3D deghosting and wavefield reconstruction methods enabled by multicomponent seismic information are disclosed, which may be performed as methods. In some embodiments, such methods may be performed on computing systems. | 07-17-2014 |

20140269185 | TIME-LAPSE MONITORING - Described herein are implementations of various technologies for a method. The method may receive a baseline survey dataset for a region of interest. The method may obtain a transformed dataset from the baseline survey dataset using a transform. The method may determine sparsity characteristics from the transformed dataset. The method may determine survey parameters using the sparsity characteristics. The survey parameters may be for a monitor survey for the region of interest. | 09-18-2014 |

20140355379 | METHODS AND SYSTEMS FOR MARINE SURVEY ACQUISITION - Methods and systems for marine survey acquisition are disclosed. In one embodiment, a method is provided that may deploy a marine seismic spread that includes a first seismic source, a second seismic source and a streamer with a receiver. The second source may be disposed at a distance from the first seismic source in an inline direction. The distance may be selected to produce one or more pairs of shot points during a seismic survey. The shot points within a pair may be disposed within a range that is used to calculate a pressure source gradient between the shot points within the pair. The method may shoot the first seismic source and the second seismic source substantially simultaneously. The method may record seismic data associated with shooting the first seismic source and the second seismic source. The method may calculate the pressure source gradient for respective pairs of shot points. | 12-04-2014 |

## Massimiliano Vassallo, Clifton Terrace GB

Patent application number | Description | Published |
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20100002541 | INTERPOLATING SEISMIC DATA - A technique includes modeling interpolated seismic measurements as a random process characterized by seismic measurements acquired at a set of sensor locations and an interpolation error. The technique includes determining the interpolated seismic measurements based at least in part on a minimization of the interpolation error. | 01-07-2010 |

## Massimiliano Vassallo, Hove GB

Patent application number | Description | Published |
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20090003132 | Estimating and Using Slowness Vector Attributes in Connection with a Multi-Component Seismic Gather - A technique includes determining at least one attribute of a slowness vector associated with a seismic gather based on pressure data and an indication of particle motion that is measured by at least one seismic sensor while in tow. | 01-01-2009 |

20090290448 | System and Technique to Determine High Order Derivatives from Seismic Sensor Data - A technique includes obtaining multi-component seismic data acquired by two or more seismic sensors while in tow. The multi-component seismic data is indicative of a pressure wavefield and particle motion. The technique includes based on the data, determining at least one high order (i.e., second order or higher) spatial derivative of the pressure wavefield. | 11-26-2009 |