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Study of the motion of soil and rock From Wikipedia, the free encyclopedia
Geomechanics (from the Greek γεός, i.e. prefix geo- meaning "earth"; and "mechanics") is the study of the mechanical state of the Earth's crust and the processes occurring in it under the influence of natural physical factors. It involves the study of the mechanics of soil and rock.
The two main disciplines of geomechanics are soil mechanics and rock mechanics. Former deals with the soil behaviour from a small scale to a landslide scale. The latter deals with issues in geosciences related to rock mass characterization and rock mass mechanics, such as applied to petroleum, mining and civil engineering problems, such as borehole stability, tunnel design, rock breakage, slope stability, foundations, and rock drilling.[1]
Many aspects of geomechanics overlap with parts of geotechnical engineering, engineering geology, and geological engineering. Modern developments relate to seismology, continuum mechanics, discontinuum mechanics, transport phenomena, numerical methods etc.[2]
In the petroleum industry geomechanics is used to:
To put into practice the geomechanics capabilities mentioned above, it is necessary to create a Geomechanical Model of the Earth (GEM) which consists of six key components that can be both calculated and estimated using field data:
Geotechnical engineers rely on various techniques to obtain reliable data for geomechanical models. These techniques include coring and core testing, seismic data and log analysis, well testing methods such as transient pressure analysis and hydraulic fracturing stress testing, and geophysical methods such as acoustic emission.
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