Seismic inversion with <InterWell>

Seismic inversion and characterization with InterWell may be successfully applied to:

• Matrix properties estimation (lithologies, porosity and fluid content)

• Fault and fracture network detection and characterization

• Understanding the field dynamic behavior using 4D inversion

• Designing well trajectories and geosteering using connectivity analysis

• Inferring geomechanical parameters before drilling

• Assessing inversion uncertainties and propagating them throughout reservoir property prediction using the geostatistical inversion of InterWell.

Built upon the extensive IFPen Group experience for seismic inversion, InterWell offers a unified workflow:

• Seismic data QC & conditioning: leveraging capabilities for statistical analysis, seismic quality control, sub-stack vertical time misalignment correction, horizon management and more.

• Multi-well and multi-cube wavelet estimation: best in class well-to-seismic calibration based on a hybrid deterministic/statistical wavelet estimation using a multi-well, multi-trace procedure.

• Initial acoustic/elastic parameter model creation: based on a stationary or un-stationary interpolation of well log data (using seismic velocities) according to the stratigraphy.

• Acoustic/elastic inversion: relying on unified Bayesian formalism for both 3D and 4D inversion for multi-channel grid-based joint inversion with a priori information. It takes into account the interpreted structures and stratigraphy in the optimization process. It also features the unique capability to manage inter-bed multiples.

The latest InterWell release includes new tools to deal with complex areas:

• Azimuthal inversion: a new complete workflow allows performing azimuthal inversion, still based on Bayesian formalism, for fracture assessment prior to reservoir characterization.

• Global stochastic inversion: algorithm developed by Cerena (Instituto Superior Tecnico), global optimization technique based on the trace-to-trace mismatch between real and synthetic seismic using direct sequential simulations. It increases the vertical resolution accordingly with the well-log data while using the spatial constrain of the seismic data.

• Seismic reservoir characterization: InterWell introduces new capabilities for processing inversion results in a seismic reservoir characterization workflow, performing dominant lithology prediction.

• An integrated ToolBox: designed to share a comprehensive set of functionalities and attributes to enrich both seismic inversion and reservoir characterization workflows.

The future versions of InterWell will include the following advanced technologies:

• Geostatistical inversion: increase the inversion resolution by integrating the very high vertical resolution provided by the well-log data while using the spatial constrain of the seismic data.

• Joint multi-component inversion: improved imaging from converted wave dataset inversion.