Systems and methods for optimal stacking of seismic data
AssigneeBP Corporation North America Inc.
InventorsMadhav Vyas, Arvind Sharma
Life of this patent
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Abstract
Systems and methods include seismic data stacking derived from a set of image volumes. Stacking includes finding a sub-set of seismic image volumes (and in some implementations their respective stacking weights) or multiple realizations of sub-set of seismic image volumes from a given set that are consistent and similar to each other. Some or all of the input seismic image volumes can be stacked together as they would be with a conventional stack. However, the signal-to-noise ratio can be enhanced by only stacking those volumes that contain consistent and relevant information. Optimal stacking can utilize an algorithm that can be implemented in a moving window fashion.
Claims20
A method for seismic exploration above a region of the subsurface containing structural or stratigraphic features conducive to the presence, migration, or accumulation of hydrocarbons, the method comprising:
- accessing a seismic survey containing seismic traces acquired proximate to the region of the subsurface;
- forming a set of a plurality of volumes of the seismic traces prior to any stacking of the plurality of volumes, each volume of the set of the plurality of volumes of the seismic traces imaging at least approximately a same subregion of the subsurface region;
- calculating a similarity matrix from the set of the plurality of volumes of the seismic traces;
- selecting, based on the similarity matrix, a subset of correlated volumes of the set of the plurality of volumes, wherein the subset of correlated volumes comprises volumes of the set of the plurality of volumes determined to be similar to one another;
- combining the subset of correlated volumes of the plurality of volumes into a single volume, or multiple realizations thereof, of seismic image volumes or traces;
- and
- outputting the single volume, or multiple realizations thereof, of image volumes or seismic traces for use with the seismic exploration above the region of the subsurface containing structural or stratigraphic features conducive to the presence, migration, or accumulation of hydrocarbons.
A system for seismic exploration above a region of the subsurface containing a structural or stratigraphic features conducive to the presence, migration, or accumulation of hydrocarbons, the system comprising:
- a memory storing instructions;
- and
- a processor coupled to the memory and configured to execute the instructions to perform a method comprising:
- accessing a seismic survey containing seismic traces acquired proximate to the region of the subsurface;
- forming a set of a plurality of volumes of the seismic traces prior to any stacking of the plurality of volumes, each volume of the set of the plurality of volumes of the seismic traces imaging at least approximately a same subregion of the subsurface region;
- calculating a similarity matrix from the set of the plurality of volumes of the seismic traces;
- selecting, based on the similarity matrix, a subset of correlated volumes of the set of the plurality of volumes, wherein the subset of correlated volumes comprises volumes of the set of the plurality of volumes determined to be similar to one another;
- combining the subset of correlated volumes of the plurality of volumes into a single volume, or multiple realizations thereof, of seismic image volumes or traces;
- and
- outputting the single volume, or multiple realizations thereof, of image volumes or seismic traces for use with the seismic exploration above the region of the subsurface containing structural or stratigraphic features conducive to the presence, migration, or accumulation of hydrocarbons.
A computer readable storage medium comprising instructions for causing one or more processors to perform a method for seismic exploration above a region of the subsurface containing structural or stratigraphic features conducive to the presence, migration, or accumulation of hydrocarbons, the method comprising:
- accessing a seismic survey containing seismic traces acquired proximate to the region of the subsurface;
- forming a set of a plurality of volumes of the seismic traces prior to any stacking of the plurality of volumes, each volume of the set of the plurality of volumes of the seismic traces imaging at least approximately a same subregion of the subsurface region;
- calculating a similarity matrix from the set of the plurality of volumes of the seismic traces;
- selecting, based on the similarity matrix, a subset of correlated volumes of the set of the plurality of volumes, wherein the subset of correlated volumes comprises volumes of the set of the plurality of volumes determined to be similar to one another;
- combining the subset of correlated volumes of the plurality of volumes into a single volume, or multiple realizations thereof, of seismic image volumes or traces;
- and
- outputting the single volume, or multiple realizations thereof, of image volumes or seismic traces for use with the seismic exploration above the region of the subsurface containing structural or stratigraphic features conducive to the presence, migration, or accumulation of hydrocarbons.
Dependencies are inferred from the claim text.