Optimization and application of 3D non-topological consistent blocking
LUO Kaiyun1, FANG Peng2, HE Yongqing1, JIANG Xianyi1, WU Heng1
1. Acquisition Technique Center, BGP, Zhuozhou, Hebei 072751, China; 2. College of Information Science and Technology, Chengdu University of Technology, Chengdu, Sichuan 610059, China
Abstract：In seismic exploration,a 3D model is very important for forward numerical simulation,of which blocking is the core.Presently,block tracking technologies are based on the topologic structure of the intersection on the model.When some topologic errors exist on the intersection,such as leaks or crossover,a correct block can’t be established.A new blocking method is proposed,which is totally independent of topology of the intersection curves of the model.The algorithm is simply based on the shape of the curved model itself to build a block and use the Visual Observation Technology to automatically tracking the triangular mesh of the block boundary.In order to reduce the computing redundancy in the original algorithm and enhance tracking efficiency,an optimized method which is based on Octree is proposed.Many modeling tests have proved that the optimization algorithm has not only better blocking performance but also provides a higher blocking success rate.It is practical and effective in field application.
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