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## Data description

The 3-D OBS dataset has been already preprocessed and separated into a PP and a PS section. This thesis focus on the PS section only. The subset of the dataset consists of 250 inline CMPs, 50 crossline CMPs, 200 inline half-offset, and 40 crossline half-offset.

shot-rec-nc
Figure 5
Source (a) and receiver (b) distribution for the fraction of OBS dataset in study.

Figure  shows the spatial distribution for the shots on the left, and receivers on the right. Notice the gap in the source distribution due to the production platform for the Alba oil field. Additionally, Figure  shows the distribution of the CMPs on the left, and the offsets on the right. Remember, the final solution for the inverse problem is a regular common-azimuth cube where all the crossline offsets are collapsed to zero crossline offset. Figure  shows a section of the input data. The figure displays the five dimensions of the prestack data cube. The top panel presents the inline-CMP () and crossline-CMP () sections for a constant inline-offset (hx)=-224 m, and constant crossline-offset (hy)=-16.5 m. The center panel presents the inline sections for a constant =550 m, and a constant hy=-16.5 m. The bottom panel presents the crossline sections for a constant =3100 m, and constant hx=-224 m. Observe the sparsity and the holes of the data due to acquisition problems.

cmp-off-nc
Figure 6
CMPs (a) and half-offset (b) distribution for the fraction of OBS dataset in study.

data-nc
Figure 7
5-D representation for the real dataset. Top panel, and sections for a hx=-224 m and hy=-16.5 m. Center panel, and hx sections for =550 m and hy=-16.5. Bottom panel, and hy sections for =3100 m and hx=-224 m.

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Stanford Exploration Project
12/14/2006