Análise da sensibilidade de parâmetros da simulação estocástica em reservatórios usando o método plurigaussiano

Abstract

Geostatistical simulation techniques have an important role in petroleum reservoir characterization. With this tool it is possible to reproduce observed heterogeneities and to characterize better the reservoir geology. However, as there are many variables to be analyzed and interpreted by geologists, it is necessary an uncertainty study of parameters used in the project. Thus, the main aim of this paper is to analyze the sensitivity of two parameters from lithotypes geostatistical simulation to verify if there are, or there may be, significant differences regarding a base model. Plurigaussian algorithm was used to perform stochastic simulations for base model and two study-cases: in the first case the structure of variogram model was modified and in the second one the range of variogram model was modified. It was possible to notice that these two modifications generated models with significant differences regarding the continuity and connectivity of simulated lithotypes.