PGS Brings rockAVO to Africa

PGS has well data for several African countries in its MultiClient data library, including rock physics, interactive seismic AVO modeling capabilities, and data atlases.

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  • Seamless and fast integration of seismic and well data using rockAVO and PGS MultiClient data allows QC by checking for AVO compliance and image integrity
  • Rapid screening for analogs and realtime scenario testing of lithology, fluid, and porosity in rockAVO
  • rockAVO is an interactive rock physics tool that helps to derisk plays
  • using rockAVO makes rock property information accessible for non-rock physics experts

 

Integrating seismic with well data enables exploration teams to calibrate the seismic data with conditioned well data and known production scenarios.

For E&P companies active in Africa, access to a homogeneous database of interpreted well logs will make it possible to analyze the seismic AVO signature based on different fluid and matrix property perturbations. For African governments keen to promote their offshore areas, the ability to provide harmonized seismic and well data in the same library is a valuable asset in the competition for energy company interest. Access to interactive rock physics modeling tools, in addition to seismic, will further improve derisking and make it easier for exploration teams to identify play analogs for prospect screening and analysis. Production teams can use these tools to interrogate nearfield opportunities.

For further information contact: amme.info@pgs.com

PGS Gets Closer to the Reservoir with Rock Physics Integration

Rock physics is the link between the seismic response and geological properties. It explains how rock properties like clay content, porosity and fluid fill influence elastic properties such as velocity and Poisson’s ratio and therefore the prestack seismic amplitude response at the well location.

PGS has integrated well-based rock physics data in its MultiClient data library and offers the interactive rock physics atlas browser rockAVO as a MultiClient product.

Current rock physics atlases fit with the PGS seismic data library, new rockAVO atlases for West Africa augment existing offerings in the US and Europe.

The combination of GeoStreamer, reprocessed broadband seismic and imaging technology with rockAVO rock physics tools and atlases offers significant benefits when integrating seismic with well data, for example, in demonstrating AVO compliance.

Unlocking Reservoir Properties

Rock physics properties vary from basin to basin and stratigraphic interval to interval. For each, a separate model or rock physics template is required that relates the seismic response to earth properties. PGS has ample access to seismic and is now adding the geological part that comes from well data. rockAVO, a proven software tool, delivers fully interactive, well-by-well, rock physics AVO modeling. It transforms a static hardcopy study into a fully dynamic live report making it accessible to every non-rock physics expert.

Expanding Rock Physics Products in support of Exploration Regional rockAVO atlases for Europe and the Gulf of Mexico will be expanded to new areas, such as West Africa. At the exploration stage, combining regional rock physics atlases with seismic data library coverage will permit fuller and faster calibration of zones of interest and analog screening.

Calibrating Well Data to 4D Seismic

Combining 4D well modeling with 4D seismic further underscores the 4D AVO compliance and imaging integrity of PGS seismic data. 4D synthetic AVO modeling can be integrated with measured seismic gathers using the rockAVO interactive software. Therefore, PGS can deliver enhanced 4D feasibility studies and scenario modeling of reservoir characteristics, like saturation and pressure changes.

Quantitative Interpretation (QI) Advantage

The objective of QI is to derive elastic seismic attributes within their proper geological context. Rock-physics-driven QI techniques combining rockAVO, prestack AVO-compliant seismic data, and additional post-seismic inversion technologies will enhance the ability of exploration teams to accurately predict rock and fluid types during reservoir review and prospect analysis.