CORPORATE HIGH-RESOLUTION STRATIGRAPHY (HRS) FIELD EDUCATION: PRACTICE AND RESULTS IN PETROBRAS HYDROCARBON RESERVOIR MANAGEMENT
The key of the methodology is to work in different-scale concepts, tools and observations. The selection of an area depends on its potential of providing outcrops up to fulfill the requirements to generate working hypotheses (encompassing changes of scale) that can be turned on useful working thesis.
Preparing laboratories –Stacking patterns and surfaces are defined in exploratory scale (3rd order/seismic/inter-depositional systems) - SS methodology recommended - to evaluate general trend of accommodation and supply. At HRS (4th/5th order/sub-seismic/intra-depositional architectural elements), systems tract and stratigraphic surface concepts are revisited, now stressing mapability of diachronic surfaces and vertical repeatability of geo-bodies, what matches operational reservoir production management requirements.
Educational process – During 5-7 days field and office work, students describe an average 40 m- thick section/day supported by regional geological information and previously processed field data. Fine correlations are critically established, the reasoning to achieve this task and the essential of HR geological information (“portable elements”) being summarized. Rather than a model, students build a coherent HRS mental process useful to face their real HC field challenges. Enhancing their ability in the thinking process over the model concept, they realize the fundamental is to organize the sedimentary record in an orderly manner complying with respect to scale of observation and respective interpretation. Goal is achieved with case studies presentation where criteria from present field practice supported management decisions in Company’s HC fields.