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| Titel |
Geophysical monitoring in a hydrocarbon reservoir |
| VerfasserIn |
Enrico Caffagni, Goetz Bokelmann |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250124829
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| Publikation (Nr.) |
 EGU/EGU2016-4320.pdf |
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| Zusammenfassung |
| Extraction of hydrocarbons from reservoirs demands ever-increasing technological effort, and
there is need for geophysical monitoring to better understand phenomena occurring within
the reservoir. Significant deformation processes happen when man-made stimulation is
performed, in combination with effects deriving from the existing natural conditions such as
stress regime in situ or pre-existing fracturing. Keeping track of such changes in the reservoir
is important, on one hand for improving recovery of hydrocarbons, and on the other hand to
assure a safe and proper mode of operation. Monitoring becomes particularly important when
hydraulic-fracturing (HF) is used, especially in the form of the much-discussed
"fracking".
HF is a sophisticated technique that is widely applied in low-porosity geological formations
to enhance the production of natural hydrocarbons. In principle, similar HF techniques have
been applied in Europe for a long time in conventional reservoirs, and they will probably be
intensified in the near future; this suggests an increasing demand in technological
development, also for updating and adapting the existing monitoring techniques in applied
geophysics.
We review currently available geophysical techniques for reservoir monitoring, which appear
in the different fields of analysis in reservoirs. First, the properties of the hydrocarbon
reservoir are identified; here we consider geophysical monitoring exclusively. The second
step is to define the quantities that can be monitored, associated to the properties. We then
describe the geophysical monitoring techniques including the oldest ones, namely
those in practical usage from 40-50 years ago, and the most recent developments in
technology, within distinct groups, according to the application field of analysis in
reservoir.
This work is performed as part of the FracRisk consortium (www.fracrisk.eu); this project,
funded by the Horizon2020 research programme, aims at helping minimize the environmental
footprint of the shale-gas exploration and exploitation. |
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