Westerngeco L.l.p.

Qinglin Liu

Kambiz Iranpour

Everhard Johan Muyzert

Pascal Guillaume Edme

Daniel Ronnow

Julian Edward Kragh

Johan O A Robertsson

Julian Edward (Ed) Kragh

Jon Magnus Soerli

Kevin O'Connell

A technique includes receiving seismic data acquired in a seismic survey. The technique includes determining a geophysical trend of trace amplitudes indicated by the seismic data based on non-linear regression and performing quality control analysis on the seismic data based on the determined trend.

Technique and apparatus for seismic data quality control using non-linear regression analysis

To perform noise attenuation for seismic surveying, a sensor assembly is deployed on a ground surface, where the sensor assembly has a seismic sensor to measure seismic waves propagated through a subterranean structure, and a divergence sensor comprising a pressure sensor to measure noise. First data is received from the seismic sensor, and second data is received from the divergence sensor. The first data and the second data are combined to attenuate noise in the first data.

Combining seismic data from sensors to attenuate noise

A technique includes during a seismic acquisition, selectively forming groups of at least one seismic source from a plurality of seismic sources as the seismic sources become available based at least in part on a minimum source spacing distance. The technique also includes selectively activating the groups. Each group responds to being activated by substantially simultaneously initiating a sweep for the seismic source(s) of the group. The technique further includes regulating a timing of the group activations based at least in part on a slip time and a minimum group spacing distance.

Vibroseis acquisition technique and system using dynamic source control

A sensor assembly includes a housing structure, a seismic sensor in the housing structure to measure seismic waves propagated through a subterranean structure, and a pressure sensor in the housing structure. A processor in the housing structure is configured to receive a first signal based on an output of the seismic sensor, and a second signal based on an output of the pressure sensor. First and second digital filters are applied to the first and second signals. Application of the first and second digital filters to the first and second signals causes production of a substantially zero output in response to input that includes just noise data detected at the seismic sensor and the pressure sensor.

Sensor assembly having a seismic sensor, pressure sensor, and processor to apply first and second digital filters

A technique includes deploying seismic sensors to perform a seismic survey and during the deployment of the seismic sensors, testing each of the seismic sensors to determine an associated sensor transfer function. The technique includes determining an associated operator to apply to seismic data acquired by each of the seismic sensors in the seismic survey based at least in part on a frequency dependent variation between the associated sensor transfer function and a nominal response for the seismic sensor. The technique includes processing the seismic data, including applying the associated operators to the seismic data.

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Oslo, Norway

Qinglin Liu