Chapter 3 Geological aspects of petroleum related rock mechanics

Publisher Summary The purpose of this chapter is to give an introduction to geological aspects, which are of particular importance in petroleum related rock mechanics. The present state of a rock and its present mechanical properties are of interest. A sedimentary basin may be exposed to sedimentary subsidence, sea-level changes and tectonic forces creating repeated cycles of elevation and depression, in addition to erosion, changes in sedimentary environment, changes in sedimentation rate, solution and precipitation of cementing material etc. All these effects will complicate the geological description of the sedimentary basin. These geological activities and events will affect not only current rock mechanical properties, but also current boundary conditions in terms of in situ stresses and pore pressure. Therefore, knowledge of geological processes is valuable in rock engineering. Although on a totally different time scale and length scale, geological processes are often comparable with events in rock mechanics laboratory testing, which means that such tests may be used to enhance our understanding of geological phenomena.

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