Interpretation in ODM3

ODM3 is a geological correlation and interpretation tool that provides the user with a trouble-free software environment. It works with small to large well databases for both field-specific and regional studies to facilitate rapid work flow execution.

Its visualization tools vividly display curve, stratigraphic, structural and geographic information, giving the interpreter a clear understanding of data distribution and quality that can be displayed in various ways onscreen to check for accuracy and internal consistency.

Its main features are maps, well sticks or well displays, correlations, projections, a wireline curve visualization tool, log scripter, 3D visualization, well data dictionaries and a rich set of reporting tools.

Maps

ODM3 has a simple yet powerful mapping system. The user can display:

• GIS data which includes shape files of cultural data;
• Well paths from deviation surveys;
• Bubble maps;
• Facies trends based on curve interpretations;
• Petrophysical trends;
• Grids imported from most mapping packages such as ZMap, CPS3, Petrel, RMS and Gocad;
• Saveable, user-defined colour bars.

Well Sticks

Well sticks are log plots that can be a simple set of one or two curves or full composite or petrophysical logs with interpreted lithologies. They can be displayed in measured depth (MD) or structural depth (TVDSS). Layouts can be defined to suit users’ needs, from ‘light’ users to petrophysicists, and then saved as templates which include a picture of the display to help subsequent recognition.

Displays can define standard curves and user-created data such as tops, lithologies, core intervals, perforation intervals and hydrocarbon zones. Interpretation is interactive although data may also be keyed in or imported from Excel spreadsheets or Openworks.

Correlation charts

Well to well correlation is flexible and controlled by the interpreter. Wells for cross-sections can be chosen from a data entry menu or by clicking on a map and wells spacing can be evenly distributed, geographically proportional or moved by dragging the mouse. Different well templates can be applied to each well and wells may be repeated in the same correlation chart, displayed in both measured depth and structural depth if desired. Correlations are created manually or with smart tools and a pinchout tool clearly displays any missing sections.

Projections

Projections show the actual well path in a user-defined 2D display to make clear the geographic and stratigraphic relationships of highly deviated wells. Users also define the template-based displays, which can be saved or created on the fly. They can show virtually any data such as curves, lithologies, core intervals, hydrocarbon zones and perforation intervals and pinpoint the precise geographical positioning of wells. Depth grids are projected on the plane of the well path and wells and projection scales with vertical exaggerations are user-defined.

Wireline curve visualization tool

Wireline curves can be viewed for data consistency. They can be copied to default curve names without replacing the original curves and users can shift and edit curve data, remove nulls, search and replace, clip values and control curves in exactly the way they need.

Log scripter

ODM contains a powerful macro language that makes data manipulation easy for anyone who can write Excel macros or handle Visual Basic.

3D visualization

All data are displayed in 3D and rotated or zoomed with the mouse. The processes are simple to control and mouse-driven including vertical exaggeration. Data selection and display is flexible and users can display well paths with well curves, lithostratigraphy, lithologies and shows, as well as depth grids from sources such as ZMap, Petrel and CPS3. A depth-defined clip or base plane is vertically moveable to emphasize structure, 3D images are easily exported to PowerPoint or other display software and quality control is made much more precise.

Dictionaries

Dictionaries are user-defined and control the way all data are displayed and organized. They set default displays of all curves, determine how lithologies are shown on well sticks and cross-sections and set the colours for lithostratigraphy in well displays and cross-sections.

Reports and Tools

All data can be viewed in tables and/or exported in Excel format to check quality and interpretation or to use in Excel or other programs. Users can export multi-well data of any type, such as tops, interval thickness, average porosities, average permeabilities and percent sandstone. They can also find and replace values easily and create a table of proposed well tops with depth grids in Measured Depth and/or depth subsea with X and Y values