METHODS AND SYSTEMS TO REMOVE PARTICLE-MOTION-SENSOR NOISE FROM VERTICAL-VELOCITY DATA

摘要

Methods and systems that remove particle-sensor noise from measured vertical-velocity wavefield are presented. A approximate vertical-velocity data is computed from pressure data and vertical-velocity data at receiver coordinates of a seismic data acquisition system. The pressure data is composed of a pressure signal component and pressure-sensor noise and the vertical-velocity data is composed of a vertical-velocity signal component and particle-motion-sensor noise. A filter that gives a minimum difference between the vertical-velocity data and the approximate vertical-velocity data at each receiver coordinate is computed. Vertical-velocity data composed of the vertical-velocity signal component and approximate particle-motion-sensor noise based on the pressure-sensor noise is convolved with the filter at each receiver coordinate.

主权项

1. A method to remove particle-motion-sensor noise from vertical-velocity data, the method comprising:
computing approximate vertical-velocity data from pressure data and vertical-velocity data measured at each receiver coordinate of a seismic data acquisition system, the pressure data having a pressure-signal component and pressure-sensor noise and the vertical-velocity data having a vertical-velocity signal component and particle-motion-sensor noise; computing a filter that gives a minimum difference between the vertical-velocity data and the approximate vertical-velocity data at each receiver coordinate; and computing noise-corrected vertical-velocity data composed of the vertical-velocity signal component and an approximate particle-motion-sensor noise convolved with the filter at each receiver coordinate, the approximate particle-motion-sensor noise composed of the pressure-sensor noise.