A channel fan system from West of Shetlands revealed in the volume by horizon sculpting with variable opacity. - (Data courtesy of CGGVeritas)

Paradigm VoxelGeo, Third Edition is the industry-leading volume visualization and seismic interpretation application for 3D seismic data.

Volume visualization enables interpreters to see and then interpret 3D features within a volume of seismic data. VoxelGeo enables viewing within the volume using a unique set of techniques that selectively exclude data by trimming or volume sculpting and then by making some amplitude values transparent. For example, when viewing bright spots, intermediate amplitude values may be made transparent so that only the extreme positive and negative values are viewable.”

In areas of complex structure, VoxelGeo allows faults and horizons to be viewed along strike within the volume; viewable amplitudes may be restricted to the most positive or most negative. This technique enables structural interpretations to be made in areas where seismic imaging fails to deliver high signal to noise. For hydrocarbon-productive areas, fluid contacts may be enhanced by viewing the volume horizontally with some transparency for all amplitudes.

To aid interpretation, VoxelGeo enables attributes that enhance volume properties to be co-rendered with each other or with the reflection amplitudes. For example, coherency-plus-amplitude or amplitude-plus-interval velocity are common attribute combinations. Additionally, well data and interpreted data may be viewed with seismic data in 3D.

Stratigraphic features such as channel, delta and fan systems are inherently 3D in nature. Parts of these systems may be relatively flat when deposited. Using VoxelGeo, these can be recovered by re-datuming the volume to an interpreted horizon, an artificial index horizon or a depthand- space shifted horizon. The associated levees, crevasse splays, fans and overbank deposits will usually occupy different depths to the main body of the channel. These systems can often be revealed in 3D and recognized by using VoxelGeo volume visualization with variable opacity.

VoxelGeo also provides:

• Productivity tools to perform structural interpretation
• Geobody detection tools to extract features
• Ability to generate high quality movies using key-index frames with subsequent frame interpolation for interpretation and presentation purposes

	Subtle faults enhanced by optical stacking and viewing along strike. (Data courtesy of CGGVeritas)

Improved volume and surface visualization

• Scan rapidly along in-line, cross line or depth directions to reconnoiter volumes
• Expose coherent depositional units by removing regions of volume using horizon and fault sculpting
• Expose the interior volume using rectangular bounds or slab thicknesses to trim
• Use VoxelGeo variable opacity to view bright spots, stratigraphic features, faults, horizons and fluid contacts and remove unwanted volume elements
• Examine direction-towards-basin or look for channels relative to maximum flooding surface by flattening volumes on interpreted surfaces
• Index volume based on sub-volume detections or cross plot constraints, and then use opacity to remove indexed volume regions
• Show well data, culture and interpreted surfaces and geobodies with transparency, lighting and optional draped attributes both restricted to seismic data and in full 3D
• Make movies and save views in CGM or JPG format for hardcopy

Highly functional interpretation of multiple 3D seismic volumes

• View multiple volumes in multiple-linked views with cross-referenced cursors
• Use blending to view multiple volumes in a single view
• Perform geobody detection using multi-volume constraints or volume cross plot constraints
• Calculate new volumes using VoxelGeo Volume Math

New productivity tools for interpreters

• Reduce mouse clicks and improve horizon pick quality with advanced waveform horizon auto-picking using the Paradigm 3D Propagator, or by horizon tracking for both good and poor data
• Improve the accuracy of interpreted fault shape and reduce fatigue with FaultTrak computer-assisted fault picking
• Extract geobodies using sub-volume detection from seed picks with or without connectivity constraints
• Save detected geobodies as tessellated volumes or as volumes with horizon tops and bases or by indexing the geo-bodies within a volume

VoxelGeo links easily to Paradigm advanced workflows

• Provide easy access to complex trace attribute calculation in RAM
• Integrate directly with Paradigm SeisEarth™ (multi-survey interpretation), Stratimagic™ (seismic facies classification), DirectorGeo™ directional well planning), Probe™ (amplitude versus angle analysis), Pre-Stack Interpreter (prestack interpretation) and Base Map (mapping).
• Link easily to third-party databases using direct links