Integrated whole-rock trace element geochemistry and heavy mineral chemistry studies: Aids to the correlation of continental red-bed reservoirs in the Beryl Field, UK North Sea

J. Preston*, A. Hartley, M. Hole, S. Buck, J. Bond, M. Mange, J. Still

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

64 Citations (Scopus)

Abstract

Correlating continental red-bed successions in the sub-surface is a common problem for the hydrocarbon industry. These successions are typically barren of fauna and often monotonous, leading to non-diagnostic wire-line log signatures. A high-resolution, high precision study of detrital garnet chemistry within Triassic reservoir sandstones from the Beryl Field of the North Sea failed to subdivide the sequence satisfactorily. However, the whole-rock concentrations of immobile trace elements such as Zr, Nb and Cr can be shown to be controlled primarily by the abundances of the heavy minerals zircon, rutile and chrome-spinel, respectively. The chemistry of detrital rutile and chrome spinel varies widely within any one sample, implying that the whole-rock concentrations of Nb and Cr are also a function of the chemistry of these heavy minerals. Having calibrated a type well with a detailed mineralogical and geochemical study, it was possible to correlate between wells using whole-rock geochemical cross-plots.

Original languageEnglish
Pages (from-to)7-16
Number of pages10
JournalPetroleum Geoscience
Volume4
Issue number1
DOIs
Publication statusPublished - 1 Feb 1998

Bibliographical note

We would like to thank Mobil North Sea Ltd and partners in the Beryl Field (Enterprise, Amerada Hess, British Gas and OMV Aktiengesellschaft) for funding the work and permission to publish. Whole-rock geochemical data for Well 9/13a-S36 were generated by Euan Williams during the production of an MSc thesis at Aberdeen University; the efforts of Euan and Collin Wood in the production of the excellent XRF data sets are gratefully acknowledged. We would like to thank Bryan Cronin and two anonymous reviewers for their careful considerations on an earlier draft of this paper

Keywords

  • Correlation
  • Geochemistry
  • Heavy mineral
  • Red bed
  • Trace element

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