Surface Modeling

Take advantage of our comprehensive suite of graphical and editing operations to present a better understanding of subsurface data for more successful drilling and exploitation programs.

High-performance gridding

Data acquired from wells can be combined with information from 2D and 3D seismic surveys or other sources. Petrosys gridding takes into account faults and other discontinuities and provides a range of options so that you can apply your geological or engineering knowledge to the process. The gridding workflow delivers velocity, well and reservoir parameter models, contour and color fill maps, and detailed volumetrics estimates. Petrosys grid operations form the basis for standard procedures such as tying seismic velocities or depths to well data; mapping well proximities and sample densities; back interpolating smoothed velocity, time or depth data to wells or seismic lines; estimating reservoir extents; depth conversions; and volumetric computations.

Direct connectivity, improved surface creation

In a single pass, combine interpreted seismic horizon data from SeisWorks, GeoFrame and SMT; formation tops from Finder, GeoFrame, Petra and OpenWorks; well data from PPDM databases, digitized contours, XYZ data files, generic spatial data and more. Grids can be imported from a range of data sources and exported in formats compatible with Eclipse, VIP and other popular reservoir simulators. Petrosys supports writing grids directly back to OpenWorks and Petra databases and into RESCUE models.

A range of options puts you in total control

Grid values are initially estimated on a coarse grid to provide good interpolation between sparse samples and are then progressively refined to create a precise model of densely sampled areas. This smart weighting technique creates an excellent surface representation that faithfully matches the input data within the cell size constraints with both small and large gaps reliably interpolated. Smoothing can be applied during and after the gridding process and the resultant grids can be automatically clipped to within a given distance from the sample locations used. An optional interactive graphics display lets you monitor the computation, which can be interrupted if the computation is to be restarted with modified parameters or data. At each stage of the cell subdivision process, Petrosys estimates and reports the deviation of the computed grid from the raw data, providing numeric feedback on gridding quality.

Tie the seismic depth model to formation picks to lock down the absolute depth at well tracks, creating the surface that your geoscientists can justify.

Serious exploration work depends on it.

Petrosys expects and understands faults

You can use faults directly from your interpretation system, or bring them into Petrosys to enhance them interactively. You control the process, organizing and managing your data so that discontinuities and regional trends are carefully incorporated and accurately represented. Petrosys tools allow you to handle many different types of faults and to avoid problems, such as improperly connected faults or incomplete breaks. Smart weighting, grouping and interpolation methods let you enhance resolution and better manage discontinuous surfaces. Regional trends can be taken into account by adding faults later.

Maintain large datasets quickly, efficiently

Petrosys grid management technology gives you the power to do more with less. Work with sparsely populated grids. Perform operations across families of surfaces. Use rotated and elongated grids to allow alignment with 3D surveys or oblique target structures. Merge grids according to the relative quality of disparate data sources. And take advantage of sub-cell interpolation optimized to handle sharp breaks in slope. The Petrosys grid architecture is tuned for effective performance and storage across a range of topologies and data volumes, and incorporates metadata essential for long-term data management. What’s more, our state-of-the-art Coordinate Reference System (CRS) awareness means that grids can be converted and re-projected between UTM zones and geodetic datums and displayed correctly in regional maps and 3D views.

Effectively map structures

Petrosys mapping includes color fill, light-shaded, orthocontour, posted value, dip/azimuth and high/low displays. Consistent, interactive displays can quickly become high-resolution hard copy using a range of plotting systems. You can color fill from grids and digitized or edited contours, and take advantage of a slope-based interpolation algorithm for smooth surface rendering, even with coarse grids. Choose continuous or step-based interpolation, depending on the surface. You can illuminate the shape of a surface, as if by a single light source, a particularly effective method of investigating fine details that would otherwise be obscured by major structural features. RGB or HLS color gradients can be edited interactively and then saved, restored and exchanged between projects. A reference color bar can be interactively positioned anywhere in the map or legend area.