Glossary

The following table defines terms used frequently in the Tecplot RS User’s Manual for your reference and convenience. A general understanding of these concepts will help you understand Tecplot RS.

2D Grid

2D Grid Plots are plots with two dimensions that display one plane (layer) of grid cells at a time. You can choose which planes to plot by specifying both the view (I, J, or K) and the plane index. Radial grids also have the option of displaying the views at constant R or Theta values.

3D Grid

3D Grid Plots show the entire reservoir grid in three dimensions, in an orthogonal or per­spective view. The initial orientation of the view is preset, but the view is easily rotated, zoomed, or translated interactively.

Active Data Set

When you load multiple files, only one of the files is considered to be the active data set. The active data set displays by default in all plots and determines which entities and variables appear in the selection lists. It is also the data set to which the others are compared. The active data set displays highlighted in the Manage Data dialog.

Anchor Point

The fixed point of an object on the plot (such as a specific corner of an inserted geometry).

Antialiasing

The process of removing or reducing the jagged distortions in curves and diagonal lines.

Arbitrary Slice

An arbitrary slice cuts through the 3D Grid along any plane. The slice can span the grid or be clipped to selected cells.

ASCII Text File

A text file composed of code representing English characters as numbers, where each letter is assigned a number from 0 to 127.

Blanking

A feature of Tecplot RS that excludes certain cells and points from a plot. Tecplot RS includes two types of blanking: Cell Value Blanking and Pick blanking.

Branches

For a multi-lateral well, branches are the extensions of the well that branch off from the main well stem. Branches are usually made of multiple segments.

Cell

The space containing one increment of each index of IJK or IJK-ordered data.

Cell Value Blank­ing

A method of value blanking that enables turning on or off individual drawing elements (usu­ally cells) according to the values of selected constraint variables.

Cell-Centered Values

Values located at the center of the cell (assumed to be the centroid).

Color Map

A color spectrum used to plot contour flooding and multi-colored objects.

Completion

A node along a well path where a reservoir fluid is produced or injected. The nodes are defined at cell centers.

Completion Pro­file

A horizontal bar chart that provides the contribution of each completion, usually for a pro­duction variable.

Configuration File

A file containing initial Tecplot RS defaults.

Connectivity

The line segments that connect completions to form the well path.

Continuous Con­tour Flooding

A type of color display representing a variable in which Tecplot RS assigns a color to each point in a mesh, based on the contour variable and color map. Tecplot RS fills each face with colors interpolated between the corner nodes, resulting in a smooth variation of color over the surface.

Contour

A field plot type that plots iso-valued lines, or color flooding based on the values of a spec­ified variable.

Coordinate

Any of a set of numbers used in specifying the location of a point on a plot

Data File

A file that contains data used for plotting in Tecplot RS.

Data Point

A location with X, Y, and Z coordinates at which field variables are defined.

Data Set

A set of data for one or more entities or grids.

Delta File

A delta file contains the difference values between two different solution files with the same grid.

Dependent

An axis mode requiring the axes to maintain a fixed ratio to one another.

Depth

For image export, the number of bits stored per pixel.

Derived Object

A graphic object visible in the plot and created from data; for example, an Iso-surface, a slice, or a streamtrace.

Dynamic Text

Special placeholders added to text that change with the data or display environment to give a description of the data or display environment.

Entity

A data structure such as well completion, group, region and field. Each entity may have its own set of variables.

Error Bars

An XY line setting in which a second dependent variable (error) can appear in a plot to show the accuracy range of the first dependent variable.

Filtering

The filtering option allows you to select entities based on criteria such as entity type, name or variable value. When filtering is in use, only the entities that meet the criteria in the Fil­tering dialog will be available for your plot.

Flow Tables

Flow tables contain an N-dimensional array of bottom hole pressure (BHP) values plotted for N-independent variables. Flow table plots are created from one or more Chears *.flot files.

Font Modifier

The modifier used to embed Greek, Math, or User-Defined characters in a text box.

Frame

Area within the workspace in which you can create sketches and plots.

Frame Coordi­nate System

Coordinate system fixed to the frame that does not change when the plot is zoomed, trans­lated, or rotated.

Ghost

 The Ghost switch allows you to see a transparent view of the entire grid. Use the Grids page of the Plot Options dialog to select Ghost options.

Gouraud Shading

Shading used to achieve smooth lighting on low-polygon surfaces by linearly interpolating a color or shade across a polygon.

Grid Area

One or more rectangular regions defined and bounded by the grid axes.

Grid Axes

An axis option which displays the coordinates of the grid along the various spatial dimen­sions.

Grid Coordinate System

A coordinate system that consists of two dimensions of physical coordinates aligned with the coordinate system and used by the plot axes.

Gridline

A set of lines drawn from one or more axes that extend from the markers on an axis across the grid area.

Grid Point

In 2D, the intersection of gridlines.

IJK Blanking

IJK Blanking is an inside view option for 3D Grid plots. It allows you to remove range of I, J and/or K values from your plot.

I-Ordered

A type of data point ordering in which each point is listed one at a time (that is, by one index). Used mainly in XY plots. In 2D or 3D, this type of data point ordering is sometimes called irregular, and is only useful for scatter plots, or for interpolating and triangulating into 2D or 3D surfaces, or 3D volumes.

IJ-Ordered

A type of data point ordering in which the points are arranged in an array used for 2D and 3D surface plotting.

IJK Blanking

A feature to include or exclude portions of an IJK-ordered zone based on index range.

IJK-Ordered

A type of data ordering where the points are arranged in a 3D array. Used for 3D volume plotting as well as 2D and 3D surface plotting.

IJK Slice

IJK Slice is an inside view option for 3D Grid plots. The IJK Slice option allows you to plot a range of indexes for a given plane (for example, the I plane) and then plots the entire range of values in the other two directions (for example, the J and K planes).

Image Format

Any of the raster or bit-mapped graphic formats supported by Tecplot RS.

Independent

An axis mode allowing each axis to have a range not affected by the ranges of any other axis or axes.

Inside Views

The Inside Views options are available in the 3D Grid plot sidebar. They allow you to quickly display subsets of your grid data.

Internal Macro Variable

A read-only macro variable which allows access to certain key values in Tecplot RS. For example, $NUMVARS gives the number of variables.

Interpolate

To assign new values for the variables at data points in one zone based on the data point values in another zone (or set of zones).

Interpolate Mode

When probing is activated using a single click, Tecplot RS returns a value linearly interpo­lated from all nodes in the cell.

I-Plane

In an ordered zone, the connected surface of all points with a constant I index. In reality, I-planes can be cylinders, spheres, or any other shape.

Irregular Data

Points which contain no order, or at least no order which can be easily converted to IJK or IJK-ordering.

Iso-surface

An inside view option for 3D Grid plots. It allows you to create one or two surfaces of a given variable. Each surface represents a constant value for the variable.

J-Plane

In an ordered zone, the connected surface of all points with a constant J index. In reality, J-planes can be cylinders, spheres, or any other shape.

K-Plane

In an ordered zone, the connected surface of all points with a constant K index. In reality, J-planes can be cylinders, spheres, or any other shape.

Line Map

A set of points where one variable is assigned to an independent axis and another is assigned to a dependent axis. You can define many line maps for an XY plot

Macro

A file containing a list of instructions, called macro commands, which can duplicate virtu­ally any action performed in Tecplot software.

Macro

Command

An instruction given to Tecplot RS in a macro file. Macro commands always start with a dollar sign and then an exclamation mark. For example, $!Redraw refreshes a plot view.

Macro File

A file which contains a series of macro commands. Macro files are run from the command line, or by choosing “Play Macro” from the Macro menu.

Macro

Function

A self-contained macro sub-routine.

Macro

Variable

A holding place for numeric values in a macro file. There are two types of macro variables: user-defined (you set and retrieve the value), or internal (Tecplot RS sets the value and you can retrieve it).

Menu bar

The top bar of the Tecplot RS workspace that contains all menu items for selection.

Mesh

A 2D or 3D plot layer which plots connections between data points.

Multi-Colored

Any Tecplot RS object colored by the value of the contour variable. Multi-colored objects may include mesh, scatter symbols, vectors, contour lines, and streamtraces.

Nearest Point Mode

When probing is activated by a Ctrl-click, Tecplot RS returns the value of the nearest point, which can be an interpolation.

Number Format

The style of numbers to display for a data or axis label; exponent, integer, float, and so on.

OpenGL

A graphics library for high-end 3D graphics. It commonly takes advantage of hardware acceleration for 3D rendering.

Ordered Data

A type of data point organization which consists of a parameterized series of points. Tecplot RS recognizes seven types of ordered data: I, J, K, IJ, JK, IK, and IJK-ordered. I, IJ, and IJK-ordered are the most common.

Paper Layout

The Paper Layout functions let you define a “template” for your plots. This template con­trols a variety of items needed to create a professional, finished presentation plot, includ­ing: paper size, headers & footers, and titles.

Pick

Select an item in the plot area by clicking on it with the pointer tool.

Pick

Blanking

Pick Blanking allows you to interactively remove a cell or group of cells from your plot.

Plot Type

Determines the type of plot (and plot settings) displayed in the Tecplot RS workspace, as well as the accompanying sidebar type. Tecplot RS plot types include various XY plot types, 2D and 3D grid plot types, and several specialty plot types.

Polyline

A continuous line composed of one or more line segments.

Probe

To obtain variable values by specified position in a plot by clicking on that point in the data region.

Project File

A specialized macro file with the extension .rsprj that preserves a plot created within Tecplot RS, thus enabling the loading and unloading of a set of files simultaneously. When the project file is opened, it restores Tecplot RS to the state it was in when the project file was saved. The project file can include any of the following file types: Custom files, Style files, and Paper Layout Template files (.rsc, .rsstyx, and .rslayx, respectively). The project file will also include the solution files associated with any active grid file. The file includes a section with instructions for recreating XY Freestyle plot types.

Property Modi­fier

Use the Property Modifier function to create an ASCII file to use as input into reservoir sim­ulation programs to modify properties within the simulator.

Push

Send selected geometries or text behind other plot elements.

2D Plane in 3D View

2D Plane in 3D View plots allow you to display a 3D view of your current 2D Grid Plots.

Depth

A Depth plot adds an RFT plot next to your current grid plot. The values displayed in the RFT plot depend on the selected cell in the grid plot. To alter the RFT plot settings, switch your plot type to XY Variables.

Time/History

An Time/History plot adds an XY Variable plot next to your current grid plot. The values displayed in the XY plot depend on the selected cell or well and time in the grid plot.

Rake

A specified line from which two or more streamtraces are generated.

Selection Set

Selection sets are user-defined groups of entities that are used for filtering purposes. They can also be used to create a User Group.

Shading

A 2D or 3D grid plot layer which plots solid color or colors with lighting effect over the cells of the data.

Sidebar

The bar of plot settings accessible at all times without opening a dialog (except when turned off in the View menu).

Slice

A set of data created by the intersection of a plane with 3D data.

Sort

A measurement from one to two of the amount of work Tecplot RS should do to resolve hid­den-surface problems during 3D sorting, such as for image export. Choosing “2” will increase the time required for each redraw and will generate messages about the number of cells with a potential conflict.

Status Line

The bar located at the bottom of the Tecplot RS workspace which provides hover help for tools, and includes a progress bar for lengthy calculations.

Style Set

When comparing files, use the Style Set options on the XY Lines page of the Plot Options dialog to define different colors and/or patterns for the comparison data sets.

Supersampling Factor

When antialiasing an image for export, the factor Tecplot RS uses when creating an inter­mediate image that it then resizes down to the final image size. The larger the value, the smoother the resulting image, at the cost of speed. Values of more than 3 are seldom neces­sary.

Toolbar

The bar of tools that appears by default at the top of the Tecplot RS workspace. These tools follow the main workflow steps typical of Tecplot RS users.

Transient Data

Data that has a time component in addition to one or more spatial component(s).

Translucency

A property allowing you to see through an object to areas within or beyond it.

Unordered or Unorganized Data

(See Irregular Data.)

User Group

A user group is a user created entity where the variable values are calculated from two or more wells. The wells are specified by a Selection Set.

Variable

One of the values defined at every data point in a data set or data file.

Well Blanking

Well Blanking allows you to display only the cells that include a well path.

Workspace

The portion of your screen in which you can create Tecplot RS frames and work with data. This includes but is not limited to the region covered by the displayed paper.

XY Custom Enti­ties

The XY Custom Entities plot type allows you to plot multiple entities on the same plot with a user-specified x and y-axis variable.

XY-Dependent

A 3D axis mode in which X and Y are fixed (dependent), and Z varies freely in ratio (inde­pendently).

XY Entities

XY Entity plots depict an entity or group of entities plotted for single XY axes variable pair.

XY Freestyle

XY Freestyle plots allow you to manually specify the components of your plot.

XY Subsets

 XY Subset plots allow you to view all of the components of a single well, user group or branch at one time (for a single variable).

XY Variables

XY variable plots depict a single X-axis (independent) variable with up to five Y-axis (dependent) variables. Tecplot RS applies the axis variable selections to all entities.