Sandstone cementation and fluids in hydrocarbon basins

R. S. Haszeldine, C. I. MacAulay, A. Marchand, M. Wilkinson, C. M. Graham, A. Cavanagh, A. E. Fallick, G. D. Couples

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Are porewater flow or stasis exclusive hypotheses? We think there is an intermediate view. Processes governing sandstone cementation in the deep sub-surface are elusive, case-specific and difficult to model in general terms. Combining techniques from petrography, isotopic and ion microprobe analyses with basin modelling one can narrow the possibilities towards unique hypotheses. Examples are given, predominantly from the North Sea basins, where palaeo-porewaters in different settings may evidence: (1) meteoric, compaction, or convection origins; (2) overpressured vertical leakoff; and (3) stasis and >100 m 'diffusion', helped by flow dispersion. Geochemical interaction transfers K and Al to muds, C to sands and forms secondary porosity by feldspar loss at depth, late carbonates, and hairy illite that can date oil charge.

Original languageEnglish
Pages (from-to)195-200
Number of pages6
JournalJournal of Geochemical Exploration
Volume69-70
DOIs
Publication statusPublished - Jun 2000
EventGeofluids III - 3rd International Conference on Fluid Evolution, Migration and Interaction in Sedimentary Basins and Orogenic Belts - Barcelona, Spain
Duration: 12 Jul 200014 Jul 2000

Keywords

  • Aquifer
  • Diagenesis
  • Isotope
  • North Sea
  • Permeability
  • Porosity

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