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Rock Physics Template Analysis of Norwegian Shelf Clay-rich Source Rocks
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Third EAGE Workshop on Rock Physics, Nov 2015, Volume 2015, p.1 - 5
Abstract
In this study we investigate the rock physics properties of Draupne/Spekk Fm organic rich shales offshore Norway using rock physics templates for clay-rich source rocks ( Carcione and Avseth, 2015 ). We attempt to understand the complex geologic processes of organic rich shales, and how these processes control the rock physics properties and seismic signatures of these rocks. With burial depth, there are many competing effects that impact the rock physics parameters of organic rich shales. The compaction itself will reduce porosities and stiffen the rock frame, associated with both mechanical and chemical compaction. The kerogen will gradually transform to hydrocarbons with increasing maturity. Using rock physics models we try to understand the effects of diagenesis, TOC/kerogen volume, hydrocarbon generation/expulsion, and overpressure. We investigate well log data from different basins, and at varying maturation levels. One of the main goals is to be able to discriminate mature, clay-rich source rocks from hydrocarbon-filled sandstones.