METODOLOGÍA DE INTERPRETACIÓN SÍSMICA PARA IDENTIFICACIÓN DE ZONAS PROSPECTIVAS Y POSICIONAMIENTO DE POZOS

Abstract

The seismic interpretation in the exploration of hydrocarbon resources is subject to a high level of uncertainty when trying to set the rock properties and the amount of fluids with commercial interest. The seismic interpretation methodology employed in this work allows to predict quantitatively the fluid present in the rock, by integrating stochastic techniques based on statistical analysis of the main parameters characterizing the reservoir, using seismic data (speed, impedance amplitude) [1], well logs (gamma ray, density, resistivity, etc.) and rock physics relationships (lithology, porosity, permeability, pore fluid and net to gross). By means of Bayes probabilistic method are obtained probability density functions (pdf) conditionated to the parameters that will be studied, they describe the expected distribution of the properties when the saturation state of the reservoir rock is specified. These pdfs are used to predict the most likely area for the location of new wells. This research aims to encourage decision-making processes based on the application of combined statistical inference techniques in a methodology for a quantitative seismic interpretation. The methodology integrates multiple sources of information to quantify exploratory probability of fluids in reservoirs.

Keywords

• Bayesian probability
• quantitative interpretation
• seismic methodology
• well logs
• fluid substitution.