Extracting High Fidelity Geological Information from 3D Seismic and Well Data

Digital well log and 3D pre-stack seismic data are combined to improve reservoir characterization. 3Dseismic pre-stack gathers contain significant information about lithology, rock properties and fluid content. The biggest challenge is to integrate log scale geologic information with seismic scale measurement of the same geological unit. Gulf Coast geoscientists have actively been using integrated seismic gathers and well logs in AVO and inversion analysis for decades. Rocks of the mid-continent have often led us to discount, or even dismiss completely, the analytical capabilities of onshore seismic gathers. Traditionally, rock properties are estimated from elastic inversion results using neural networks. This article discusses a method that utilizes the power of digital log analysis, LambdaRho/MuRho innovative cross plots and integration with seismic pre-stack gathers to predict rock properties in the unconventional reservoirs.