Landmark培训多媒体之三.ppt

1- Chapter 8:Creating Structure and Isochore Maps StratWorks uses the mapping algorithms of Z-MAP Plus to produce reliable, high-quality structure, thickness, and production maps. You had a preview of mapping in Chapter 5, when you generated quick maps of the existing interpretation. In this chapter, you cover mapping in greater depth. Overview This chapter describes the basic mapping functions available in StratWorks. Through examples and exercises, you learn how to create structure maps based on picks, profiles, and existing pointsets (from earlier maps or from imported data) map unit-related data such as gross thickness, average porosity, porosity*thickness (FH), and production history display maps using contour lines and/or colorfill overlay maps to facilitate comparisons adjust grid parameters to make contours “honor” the data perform mathematical operations on grids Training Workflow Mapping: Basic Functions and Use StratWorks generates maps by first building a grid over the area of interest and calculating values for each node (intersection) on the grid. Contours are generated from the gridded surface. In StratWorks, you can make eight types of structure maps. Structure mapping uses the least squares algorithm from Point Gridding Plus (Z-MAP Plus). Surface maps can be made from well picks, and/or interpreted surface segments (profiles), and/or saved pointsets (which you created when you made a previous map or you imported fromZ-MAP Plus) Pointsets and grids are saved in the database under the output name you assign them. Contours are not saved; they are regenerated each time you display the map. Mapping: Basic Functions and Use (continued) Isochore mapping uses either the least squares, isochore, or bounding grid algorithms. You can perform a variety of mathematical operations (+, -, *, /, , , blank , blank ) on a single grid or between two grids. The result is a new output grid, which you can then contour. Pointsets, grids, and faults can be imported