The aim of Quantitative Interpretation (QI) is, through the use of amplitude analysis, to predict lithology and fluid content away from the well bore.
DUG offers two major product lines with respect to Quantitative Interpretation services. The different offerings are tailored to suit the amount and type of input data that is available and what study objectives are required to be met. Each of these products can be applied to both 2D and 3D seismic data.
Elastic properties are influenced by depositional environment (lithology type), fluid content and local geological trends (compaction/burial history).
A rock physics model should predict the elastic properties of a potential lithology:
Seismic amplitude and rock property forward modelling is performed stochastically (Monte Carlo simulation), to capture the expected range of responses for all candidate lithology and fluid combinations over the depth range of interest.
DUG Spike® is a constrained simultaneous inversion toolkit that quantifies the elastic rock properties that result in the observed AVA present in seismic data.
AVA stack rotations are DUG’s equivalent to Extended Elastic Impedance (EEI) and are designed to help discriminate between different AVA responses.
Using derived petrophysical interpretations deterministic AVA synthetics can be calculated for different fluid scenarios.
The use of a Bayesian classification framework enables prior geological knowledge to be incorporated into a probabilistic prediction, capturing uncertainty and quantifying risk.