Desenvolvimento de modelos estocasticos aplicados a descricao e caracterizacao de reservatorios petroliferos

Abstract

The main objective of this research work is the development and application of a multidisciplinary methodology to tackle critical problems related to oil reservoirs description and characterization. The use of probabilistic models in Reservoir Description is a major technological issue and allows to bridge the gap between descrptive approaches (geology) and numerical models. Furthermore they can cope with the uncertainties about the subsurface conditions, quantifying them, and leading to better predictions of reservoir internal architecture. Other innovative features are incorporated through the geostatistical procedures developed for the estimation of permeability and other pertinent variables, in order to cope with the non-stationary behaviour. Different methodologies have been assessed for reserves calculation, at global and local scales, according to Reservoir Quality Zones. The development of techniques for modelling the geometry of the reservoir and relevant layers and a new approach for the simulation of reservoir heterogeneities that condition the internal architecture, were part of the research. In summary, a network of models, suitable for geostatistical estimation and simulation of reservoir properties was built, based on a multidisciplinary approach, with positive consequences at different levels namely in areas like simulation of fluids flow, reservoir management, producing planning and oil recovery programmesAvailable from Fundacao para a Ciencia e a Tecnologia, Servico de Informacao e Documentacao, Av. D. Carlos I, 126, 1200 Lisboa / FCT - Fundação para o Ciência e a TecnologiaSIGLEPTPortuga