Oil and Gas Reservoir Characterisation
Understanding reservoir quality, heterogeneity, geometry and extent is a crucial factor of your economic decisions for both exploration and field development studies.
The prime data for reservoir characterisation come from the cores (conventional and sidewall), cuttings and logs, including Borehole Images as well as seismic data. Our experts have worked on many thousands of meters of core and cuttings from around the world. Thus, we can assist in comprehensive sedimentological and geophysical characterisation, which can be applied to provide fundamental support in constraining the distribution of reservoir properties, including the impact of diagenesis.
Benefits of SGS reservoir characterisation services
Our sedimentology and geophysics experts have vast experience in extracting and integrating knowledge from core and (or) cuttings and log analysis with seismic interpretation to:
- Define the reservoir characteristics including stratigraphic markers
- Identify stratigraphic patterns
- Assess the properties of your reservoirs, including quality, heterogeneities, geometry and extent and connectivity
- Get the most out of your vintage sedimentological reports and data
- Support well and field development planning and optimise production
Our reservoir characterisation workflow, based on QEMSCAN analysis potentially in combination with petrographical analyses such as thin section description and (or) modal point count, is designed for:
- Assessment of texture, mineral composition and characterisation of authigenic phases and sequences, grain compaction and pore space
- Interpretation of sediment source and depositional environment
- Correlation of reservoir quality with, for example:
- Diagenetic processes
- Rock type
- Primary depositional conditions
- Burial history
- Lateral and/or vertical rock distribution
- Proximity to structural elements
Using simple “classic” well datasets, the application of sedimentology to your projects can generate valuable results without expensive additional analyses.
During evaluation, sedimentological and diagenetic 3D concepts are established which allow the prediction of the spatial distribution of your reservoir properties in each stratigraphic interval. These concepts are based on a multi-scale approach and integrate:
- Mineralogy and texture from core samples and cuttings analysis:
- Petrographical analysis of thin sections
- Quantitative petrography, geochemistry and fluid inclusion for analysis of the diagenetic sequence
- Core interpretation in terms of facies, facies associations, depositional environment, and structural elements, such as fractures
- Wireline log and Borehole Image interpretation
- Rocktyping to extrapolate the findings of the sedimentological analysis to uncored intervals
- Identification of sedimentary trends on seismic attribute maps
- Extraction of seismic geobodies
Furthermore, the application of seismic inversion to (acoustic) properties derived from well log data further enhances the possibilities to characterize the reservoir in terms of a.o. porosity, lithology and fluid saturation. In this domain, we have built a range of in-house tools, for example related to fluid substitution analysis, to quickly assess the reservoir behaviour.
Why choose SGS?
We have extensive experience in reservoir characterisation in all depositional settings and reservoir types. Further, we have a global network of state-of-the-art laboratories at our disposal for sample preparation and analysis.
Contact us today to find out how SGS can support you in understanding your reservoir by making the most of your well data.