Seismic horizon autopicking using orientation vector field
AssigneeIHS Global Inc.
InventorsYingwei Yu, Clifford Lee Kelley, Irina M. Mardanova
Life of this patent
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Abstract
A method is disclosed for automatically extending interpreter horizon picks over a wider area of traces in such manner that the automatically generated picks are very similar to picks that an interpreter would pick manually. The method applies optical filters to seismic sections to determine the intrinsic orientation of seismic events. Seismic orientation is captured in the Orientation Vector Field, which is then used to guide the picking process.
Claims18
A method for determining a horizon in a two-dimensional seismic section from an initial pick point on the horizon, the seismic section comprising a plurality of samples, wherein each sample is referenced using the variable x and y as the coordinates of the sample in the seismic section, the method comprising:
- convolving a set of optical filters with the seismic section to obtain a set of responses, wherein, for each sample, there are corresponding response values associated with the x and y coordinates of the sample, the optical filters having various center orientation values;
- determining an orientation vector for each sample based on the response value associated with the x and y coordinates of the sample;
- creating an orientation vector field comprising the orientation vectors of all the samples and storing the orientation vector field;
- and
- using a computer processor to determine the horizon by following the orientation vectors of the samples in the orientation vector field, beginning with the initial pick point on the horizon.
A non-transitory computer-readable medium having instructions stored thereon that, when operated on by the computer, cause the computer to perform operations comprising:
- convolving a set of optical filters with a seismic section to obtain a set of responses, the seismic section comprising a plurality of samples, wherein each sample is referenced using the variable x and y as the coordinates of the sample in the seismic section, wherein, for each sample, there are corresponding response values associated with the x and y coordinates of the sample, the optical filters having various center orientation values;
- determining an orientation vector for each sample based on the response value associated with the x and y coordinates of the sample;
- creating an orientation vector field comprising the orientation vectors of all the samples and storing the orientation vector field;
- and
- using the orientation vector field to determine a horizon in the two-dimensional seismic section by following the orientation vectors of the samples, beginning with the initial pick point on the horizon.
Dependencies are inferred from the claim text.