Toward the creation of models to predict static and dynamic fault-seal potential in carbonates
| Autor: | John Solum, B.A.H. Huisman |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
geography
Hydrogeology geography.geographical_feature_category 010504 meteorology & atmospheric sciences Geology Volcanism Fault (geology) 010502 geochemistry & geophysics 01 natural sciences Geobiology chemistry.chemical_compound Tectonics Fuel Technology chemistry Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Carbonate Economic Geology Petrology Igneous petrology 0105 earth and related environmental sciences Environmental geology |
| Zdroj: | Petroleum Geoscience. 23:70-91 |
| ISSN: | 2041-496X 1354-0793 |
| DOI: | 10.1144/petgeo2016-044 |
| Popis: | In contrast to faults in clastic reservoirs, rules to predict the exploration and production timescale fault-seal potential in carbonates are lacking. This paper provides a summary of carbonate reservoirs with cross-fault column height differences that represent examples of apparent static fault seal, and a summary of observed examples of dynamic fault seal in carbonate reservoirs and aquifers. These include cross-fault differences in water table depths across carbonate–carbonate juxtapositions, cross-fault pressure differences in carbonate aquifers separated by faults, production-induced cross-fault pressure differences in carbonate hydrocarbon reservoirs, sealing behaviour of faults in carbonate reservoirs inferred from well tests, and examples of low fault transmissibilities from history-matching exercises from carbonate reservoirs. This paper also documents the range of compositions of fault rocks in carbonates and the range of permeabilities that have been reported from low-permeability fault cores in carbonate fault zones, as well as the implications of the observed range of fault permeabilities in carbonates for sealing behaviours. The purpose of this paper is not to argue that every fault in a carbonate reservoir will seal or will even be capable of sealing. There are, however, enough examples of faults in carbonates that are sealing in a dynamic sense, and in a static sense, that the topic of carbonate fault seal should warrant much more study. Creation of predictive models will ultimately require a considerable amount of subsurface data, but these models should be created. |
| Databáze: | OpenAIRE |
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