Abstract
Sand injectites and related features that are interpreted to have formed by large-scale, often sudden, fluid escape in the shallow (typically <500 m) crust are readily imaged on modern seismic data. Many of the features have geometrical similarity to igneous dykes and sills and cross-cut the depositional stratigraphy. Sand injectites may be multiphase and form connected, high-permeability networks that transect kilometre-scale intervals of otherwise fine-grained, low-permeability strata. North Sea examples often form significant hydrocarbon reservoirs and typically contain degraded, low-gravity crude oil. Fluid inclusion and stable isotope data from cements in sand injectites record a mixing of aqueous fluids of deep and shallow origin.
Original language | English |
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Pages (from-to) | 263-274 |
Number of pages | 11 |
Journal | GeoFluids |
Volume | 3 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2003 |
Keywords
- fluid migration
- sand injection
- seismic data
- RESERVOIR GEOMETRIES
- ALBA FIELD
- NORTH-SEA
- DEFORMATION
- INTRUSIONS
- SEDIMENTS
- BASIN
- UKCS