Tight oil generally refers to the oil stored in the tight sandstone reservoir or tight carbonate reservoir that the overburden matrix permeability is less than or equal to 0.1 mD （equivalent of about air permeability...Tight oil generally refers to the oil stored in the tight sandstone reservoir or tight carbonate reservoir that the overburden matrix permeability is less than or equal to 0.1 mD （equivalent of about air permeability less than 1.0 mD） （Zeng et al., 2014）.展开更多
In 3D urban visualization, large data volumes related to buildings are a major factor that limits the delivery and browsing speed in a web-based computer system. This paper proposes a new approach based on the level o...In 3D urban visualization, large data volumes related to buildings are a major factor that limits the delivery and browsing speed in a web-based computer system. This paper proposes a new approach based on the level of detail （LOD） technique advanced in 3D visualization in computer graphics. The key idea of LOD technique is to generalize details of object surfaces without losing details for delivery and displaying objects. This technique has been successfully used in visualizing one or a few multiple objects in films and other industries. However, applying the technique to 3D urban visualization requires an effective generalization method for urban buildings. Conventional two-dimensional （2D） generalization method at different scales provides a good generalization reference for 3D urban visualization, Yet, it is difficult to determine when and where to retrieve data for displaying buildings. To solve this problem, this paper defines an imaging scale point and image scale region for judging when and where to get the fight data for visualization. The results show that the average response time of view transformations is much decreased.展开更多
1 Introduction The western 3D region of the Sulige gas field is located in the Yi-shan slope north of northern Su47 and south of Su48 medium sand belt of the Ordos Basin, the area of it is about 431 km2. The average t...1 Introduction The western 3D region of the Sulige gas field is located in the Yi-shan slope north of northern Su47 and south of Su48 medium sand belt of the Ordos Basin, the area of it is about 431 km2. The average thickness of He8 is 69.1m, the thickness of it is 83.9m; The effective sand thickness is 14.4 m, the thickness of it is 21.5m.展开更多
基金the supports of the Project supported by the National Natural Science Foundation of China(Grant No.41330319):The Mechanisms of Petroleum Charging,Migration and Accumulation in Macro-nanometer Pore and Throat Systems in Tight Sandstone Reservoir
文摘Tight oil generally refers to the oil stored in the tight sandstone reservoir or tight carbonate reservoir that the overburden matrix permeability is less than or equal to 0.1 mD （equivalent of about air permeability less than 1.0 mD） （Zeng et al., 2014）.
基金Project 40471109 supported by the National Natural Science Foundation of China
文摘In 3D urban visualization, large data volumes related to buildings are a major factor that limits the delivery and browsing speed in a web-based computer system. This paper proposes a new approach based on the level of detail （LOD） technique advanced in 3D visualization in computer graphics. The key idea of LOD technique is to generalize details of object surfaces without losing details for delivery and displaying objects. This technique has been successfully used in visualizing one or a few multiple objects in films and other industries. However, applying the technique to 3D urban visualization requires an effective generalization method for urban buildings. Conventional two-dimensional （2D） generalization method at different scales provides a good generalization reference for 3D urban visualization, Yet, it is difficult to determine when and where to retrieve data for displaying buildings. To solve this problem, this paper defines an imaging scale point and image scale region for judging when and where to get the fight data for visualization. The results show that the average response time of view transformations is much decreased.
基金financially supported by the National Science and Technology Major Projects(2011ZX05010001-008)National 863 Plan Project(2013AA064903)+1 种基金Science and Technology Research Project of Heilongjiang Province Education Department(ky120102)Key Laboratory Open Foundation of Heilongjiang Province(sy120104)
文摘1 Introduction The western 3D region of the Sulige gas field is located in the Yi-shan slope north of northern Su47 and south of Su48 medium sand belt of the Ordos Basin, the area of it is about 431 km2. The average thickness of He8 is 69.1m, the thickness of it is 83.9m; The effective sand thickness is 14.4 m, the thickness of it is 21.5m.
