MULTI-Z POLYLINES INTERSECTION POINTS EDITING

摘要

Method and system for 3-D imaging of subterranean geologic structures based on seismic data interpretations involves correcting mis-ties that arise as a result of orthogonal polylines failing to intersect due to inconsistencies in seismic interpretations. In some embodiments, the mis-ties may be corrected by adding a data point from one polyline at or near the mis-tie to the other polyline, and vice versa for the other polyline. The two data points are then adjusted so they coincide or merge. The merged data point is then used as intersection points for the polylines and associated with one another such that a change made to one intersection point is automatically made to the other inter-section point. In some embodiments, one or more neighboring data points on each polyline are adjusted to smooth out the polyline at the point of the corrected mis-tie.

主权项

1. A computer-based imaging system for imaging a geologic structure in a subterranean formation, comprising:
a central processing unit mounted within the computer-based imaging system; a display electrically connected to the central processing unit and displaying a three-dimensional (3-D) image of the geologic structure; a data input unit electrically connected to the central processing unit, the data input unit receiving seismic interpretations for the geologic structure, the seismic interpretations comprising interpretations of data acquired from a seismic reflection survey taken of the subterranean formation; and a storage device electrically connected to the central processing unit, the storage device storing therein an imaging application executable by the central processing unit to render the seismic interpretations as multi-Z polylines, each multi-Z polyline defining a different contour of the geologic structure within a given plane, and each polyline having a plurality of intersection points where the multi-Z polyline intersects other multi-Z polylines, at least one multi-Z polyline having a mis-tie resulting from the multi-Z polyline missing an expected intersection with at least one other multi-Z polyline; wherein the storage device further stores therein a mis-tie corrections module executable by the central processing unit to tie the multi-Z polyline to the other multi-Z polyline near the expected intersection, the central processing unit executing the mis-tie corrections module either after the multi-Z polyline has been defined or while the Z polyline is being defined.