Representação espacial de lobos e canais turbidíticos em afloramentos da região de Apiúna, Bacia de Itajaí, Santa Catarina

Spatial representation of turbidite lobes and channels in outcrops of Apiúna region, Itajaí Basin, Santa Catarina

Abstract

While developing a new field, properties including thickness, area, porosity, permeability, heterogeneity of the reservoirs, determine the spacing, number, orientation and operational function of the wells. The uncertainty associated with the geological model, in the early stages of field development, is commonly high, due to the limited amount of data available directly from the new petroleum field. Thus, the use of geological information obtained from analog outcrops is used to complement the field data. New technologies allow geologists to build geological models that could not only satisfy geological aspects, conforming to the interpretation of sedimentary record, but also represent quantitative aspects such as reservoir properties distributions. This work aims at producing three-dimensional models from analog outcrops, which can be used to complete morphological (sedimentological and stratigraphic) and petrophysical parameters collected in the reservoirs. Such outcrop models can improve subsurface 3D models, and hence optimize the production process. According to current geologic and statistical data, the majority of the yet unexplored and of the already known Brazilian petroleum reserves occur in reservoirs formed by deep-water sediment-gravity flows. Accordingly, the focus of this research are turbidite outcrops located in the Itajaí Basin, in Santa Catarina State, named the Apiúna 1 and Apiúna 2 outcrops. The final result is a set of numerical models representing part of the Apiúna turbidite system (channels and lobes) in three-dimensional form.