METHODS AND SYSTEMS FOR ATTENUATING NOISE IN SEISMIC DATA

摘要

The disclosure presents computational systems and methods for attenuating noise in seismic data. The seismic data may be recorded by distributed sensors in response to acoustic signals emanating from one or more sources activated at approximately the same location with a time delay between activations of the one or more sources. The system and methods form an initial gather of traces from the seismic data and generate time-shifted gathers based on the initial gather and the time delays between activation of the sources. A realization gather is formed from traces selected from the initial gather and the time-shifted gathers. Noise in the seismic data is attenuated in the realization gather and may be removed. The realizations gathers may be used to generate high-resolution seismic images of the subterranean formation and enable quantitative seismic interpretation and improved reservoir monitoring.

主权项

1. A method for generating noise attenuated seismic data obtained from a marine survey comprising:
towing two or more sources and one or more sensors through a body of water above a subterranean formation; for each shot location,
activating the two or more sources one at a time at approximately the same shot location;receiving seismic data from the sensors;forming an initial gather of traces from the seismic data;generating time-shifted gathers based on the initial gather and time delays between activation of the two or more sources;constructing a realization gather from traces selected from the initial gather and the time-shifted gathers; andstoring the realization gather in a data-storage device.