Impact of seismic-inversion parameters on reservoir pore volume and connectivity

de Figueiredo, Leandro Passos (UFSC and LTrace) | Bordignon, Fernando Luis (UFSC and LTrace) | Grana, Dario (University of Wyoming) | Roisenberg, Mauro (UFSC) | Rodrigues, Bruno Barbosa (Petrobras)

OnePetro 

In this work, we focus on a Bayesian inversion method for the estimation of reservoir properties from seismic data and we study how the inversion parameters, such as rock-physics and geostatistical parameters, can affect the inversion results in terms of reservoir performance quantities (pore volume and connectivity). We apply a Bayesian seismic inversion based on rock-physics prior modeling for the joint estimation of facies, acoustic impedance and porosity. The method is based on a Gibbs algorithm integrated with geostatistical methods that sample spatially correlated subsurface models from the posterior distribution. With the ensemble of multiples scenarios of the subsurface conditioned to the experimental data, we can evaluate two quantities that impact the production of the reservoir: the reservoir connectivity and the connected pore volume. For each set of parameters, the inversion method yields different results. Hence, we perform a sensitivity analysis for the main parameters of the inversion method, in order to understand how the subsurface model may be influenced by erroneous assumptions and parameter settings.

Presentation Date: Monday, October 15, 2018

Start Time: 1:50:00 PM

Location: 206A (Anaheim Convention Center)

Presentation Type: Oral