3D Seismic Polyline Mis-tie Correction via Point Merging
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Solution Overview
Problem
Seismic data for subterranean salt bodies is noisy and poorly defined, leading to inconsistencies and mis-ties when using polylines to describe these structures, which complicates the creation of accurate 3-D images and models.
Innovation Solution
A method to correct mis-ties by identifying and merging data points closest to the inconsistencies, setting these merged points as intersection points, and associating them across polylines, allowing for more efficient editing and manipulation of the 3-D models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polylines are used to describe salt body boundaries, then the 3-D image can be generated, but mis-ties and inconsistencies occur at intersection points
Solution Approach 1:
The system performs preliminary action by automatically detecting and correcting mis-ties at polyline intersections before the 3-D rendering process. The mis-tie correction algorithm identifies inconsistent intersection points and adjusts the polyline geometry in advance, ensuring that all intersecting polylines meet at consistent Z-values before the salt body volume is calculated and rendered.
2Manufacturing precision
If manual editing is performed to correct mis-ties, then intersection consistency can be improved, but the time and effort required increases significantly
Solution Approach 1:
The system implements self-service by automatically detecting mis-ties at polyline intersections and correcting them without requiring manual intervention. The algorithm autonomously identifies inconsistent intersection points, calculates the appropriate corrections, and adjusts the polyline geometry, thereby eliminating the time-consuming manual editing process while maintaining high precision at intersection points.
3Manufacturing precision
If polylines are edited to fix inconsistencies, then intersection accuracy improves, but additional mis-ties may be introduced in other areas
Solution Approach 1:
The system employs feedback by implementing a comprehensive mis-tie detection and correction algorithm that scans all polyline intersections throughout the entire salt body boundary. When corrections are made, the algorithm re-evaluates all intersections to ensure no new mis-ties are introduced, providing continuous feedback to maintain consistency across the entire polyline network rather than creating localized fixes that may cause distant problems.
Data Source
AI summary
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 intersection 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.