Method for Reducing Marine Source Volume While Maintaining Image Quality
AssigneeWesternGeco L.L.C.
InventorsJulian Edward Kragh, Robert Laws, Jon-Fredrik Hopperstad
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Abstract
A technique facilitates the acquisition of seismic data at a substantially reduced source volume. The methodology generally comprises conducting a seismic survey with seismic sources that have a reduced source volume to collect seismic data. The low frequency data which is lost due to the reduced source volume is replaced with data acquired from a complementary method, such as a receiver-side acquisition method. The two sets of data are combined to provide a comprehensive seismic survey image without requiring conventional seismic source volume.
Claims20
A method of acquiring seismic data, comprising:
- conducting a seismic survey with a reduced source volume to acquire seismic data;
- replacing lost, low frequency data of the seismic data with complementary seismic data acquired from a receiver-side acquisition method;
- and
- combining the seismic data and the complementary seismic data acquired from the receiver-side acquisition method to obtain a comprehensive seismic survey image.
A method for acquiring seismic data, comprising:
- conducting a seismic survey with seismic sources;
- obtaining seismic data from the seismic survey based on higher frequency signals having a frequency of at least 20 Hz to enable collection of comprehensive seismic data at the reduced seismic source volume;
- and
- adding low frequency data, based on low frequency signals below approximately 20 Hz, obtained with a receiver-side acquisition method.
A method, comprising:
- conducting a seismic survey;
- and
- lowering a seismic source volume by collecting high frequency seismic data from a first survey procedure and replacing lost low frequency seismic data with data obtained from a complementary survey procedure.
Dependencies are inferred from the claim text.