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Calibration of Fracture Models Using Multi-Scale Outcrop Analogues – the Importance of Mechanical Stratigraphy
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Third EAGE Workshop on Naturally Fractured Reservoirs, Feb 2018, Volume 2018, p.1 - 4
Abstract
Mechanical layering exerts a critical influence in the development of fracture systems within reservoir units, therefore understanding the distribution of mechanical packages, on the scale of individual beds up to entire stratigraphic formations or groups, is essential when modelling natural fracture systems.
Outcrop analogues provide critical insight into the mechanical stratigraphy that cannot readily be derived from sub-surface data alone, although image logs or core are very useful to allow outcrop-derived interpretations of the thicknesses and proportions of different mechanical packages to be suitably calibrated.
Scaling of fracture properties is important for successful prediction of reservoir properties. Fracture size distributions are critical, but require reliable data over many orders of magnitude. Combining traditional field studies with modern geospatial technologies, together with sub-surface data when available, provides reliable, robust inputs for fracture modelling.