| With the in-depth development of our national economy, the speed and potential of the economic growth has become increasingly dependent on gas and oil and other energy strongly. Traditional resource exploration method, however, has been far from being able to meet the needs and many countries have been investing research on the exploit of fractured oil and gas resources, which has a big potential. Modeling the geological structure in three-dimension and analyzing by finite element method has become a research hotspot for computer science applying in gas and oil resource exploit field.This paper, considering the requirements of finite element method, makes a deep research on the modeling and visualization of the geological structure in three-dimension and makes several contributions as follows:1. Study the major geological model to analyze their advantages and disadvantages and decide to choose facet and tetrahedral model to support the modeling and visualization in this paper.2. Study the common surface reconstruction and operation method. Propose a curvature-based surface reconstruction method which uses a curvature-density convert model to decide the interpolation density to generate self-adaptive mesh; propose a boundary filtering based surface split method which can split surface along any given boundary and is used to recovery the geological surface.3. Basing on block model and group model, the auto-modeling method for3D geological structure with faults is proposed. This auto-modeling method reconstructs the strata and fault surfaces, makes group models from input and generates3D geological structure surface model.4. Triangulate the surface model into tetrahedrons, which is the base of fracture prediction model, by constrained Delaunay method and analyze the model by the finite element method. Design and implement the modeling prototype system and finite element computing prototype system to perform modeling, analysis and visualization. |
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