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| Titel |
Petrophysical Characterization of a CO2 storage reservoir using well logs |
| VerfasserIn |
Manuel Marquez Carrillo, Maria Jose Jurado Rodriguez |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250051724
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| Zusammenfassung |
| Developing a reservoir model for carbon dioxide storage requires a detailed petrophysical
characterization of the subsurface rocks. Deep understanding of the lithologies and
mineralogy present at depth in a potential storage formation is crucial to provide a good base
to develop a reliable reservoir model and also of potential reactions of the CO2 and the
carbonate rock minerals.
The main objective of our research is the characterization of reservoir rocks at a pilot CO2
geological storage site, in the frame of a project of the "Fundación Ciudad de la Energía"
(CIUDEN), on behalf of the Spanish Government. The pilot-scale CO2 injection project in
the vicinity of Hontomin, (Burgos, Spain) has the objective of injection of a maximum of
100.000 tons of CO2 at about 1500 meters deep. Using the available well logs and well
information available from the Hontomin field, a detailed petrophysical and mineralogical
interpretation of dolomitized limestones, dolomites and evaporites of Jurassic age was
undertaken.
The area selected for the injection is a dome-shaped structure (approximate 3 x 4
kilometers) that was explored in the past for oil and gas, and later abandoned with oil
shows. This site was selected because of its relative low structural complexity, and
because of the availability of exploration and drilling data on which our study is
based.
Besides the mineralogical inversion performed our results on porosity and permeability
calculations constrain the storage capacity of the reservoirs and the petrophysical properties
of seals. The petrophysical properties estimated with old well logs and well data allowed us
to characterize reservoir interval of adequate porosity and permeability and the presence and
features of potential seals.
The log-based interpretation of lithological logs was the first step for the study, followed by
the estimation of petrophysical properties in zones of interest for CO2 storage and finally the
correlation of the different wells in the study area. This detailed petrophysical model will
allow a better understanding of the reservoir and a more exact estimation of its
properties and provide a good base for the drilling of injection and monitoring
wells. Potential seal formations are also characterized by means of geophysical log
interpretation. |
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