A geoestatística aplicada à avaliação e caracterização de reservatórios petrolíferos.

Abstract

The concern in identifying the parameters of the reservoir that are relevant in fluid draining and shape them in a compatible scale with the study of flow simulation is old. Since 70 years it was felt necessity to describe adequately these parameters and some models and scales of heterogeneity had been considered with the objective to define heterogeneities, as also the uncertainties inherent to the knowledge of the reservoir. Among the sampling techniques in the well perforation stage, we can detach the logging, because its low cost in relation to others techniques. Through it, are gotten a series of data about the well, called profiles, whose interpretation allows an evaluation of the geologic formation in study. The geostatistic emphasizes the geologic context where the data had been gotten, the spatial relation among these data and the values measured in different volumetric supports and precision degrees. Models of geostatistic are based, in part, in probability theory, recognizing and incorporating the happened uncertainties of the process of attainment of the data. The modeling becomes an important tool, therefore it allows to simulate the regions where little or any information is available.