Reservoir diagenesis and hydrocarbon migration under hydrostatic palaeopressure conditions
| Autor: | R. E. Swarbrick |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
010504 meteorology & atmospheric sciences
Hydrostatic pressure Mineralogy Authigenic engineering.material 010502 geochemistry & geophysics Cementation (geology) 01 natural sciences Diagenesis Overpressure Geochemistry and Petrology Illite engineering Sedimentary rock Fluid inclusions Petrology Geology 0105 earth and related environmental sciences |
| Zdroj: | Clay Minerals. 29:463-473 |
| ISSN: | 1471-8030 0009-8558 |
| DOI: | 10.1180/claymin.1994.029.4.06 |
| Popis: | Fluid inclusion studies from two contrasting fields in the Northern North Sea reveal hydrostatic pressure conditions during the formation of secondary quartz overgrowths which trapped both brine and petroleum inclusions. In these fields, dating of authigenic illite, part of the diagenetic sequence and broadly coeval with quartz cementation, permits comparison with modelled pressure conditions. Pressure modelling indicates the likelihood of several periods of overpressure in the past, interspersed with normal pressure. The timing of diagenesis coincides with one of these periods of hydrostatic pressure. Furthermore, as both fields are now highly overpressured, the cause and timing of overpressure generation post-date the diagenesis. A model is proposed to link the pressure history and diagenesis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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