Reservoir Geoscience

Helford Geoscience LLP provides expert consultancy services in a range of areas of applied sedimentology, in particular in the characterisation of reservoir facies in thin section, core, and outcrop analogue studies. Dr Duncan Pirrie was Sedimentology Editor for the Journal of the Geological Society of London. He has field and laboratory experience in the examination of both clastic and carbonate facies. He has published widely on the stratigraphy of the Jurassic to Neogene of the northern Antarctic Peninsula region. He is also an acknowledged expert on sediment mineralogy and geochemistry. Areas of expertise include:

• Clastic and carbonate reservoir diagenesis
• Sediment provenance studies
• Heavy mineral analysis for provenance and inter-well correlation
• Facies and palaeoenvironmental analysis
• Outcrop analogue studies
• Field training

Helford Geoscience LLP, has expertise in, and access to, a wide range of analytical tools including transmitted and reflected light microscopy, digital photomicrographs, cold cathodo-luminescence, X-ray diffraction, X-ray fluorescence, wavelength dispersive electron microprobe analysis, Stable Isotope Geochemistry, low vacuum scanning electron microscopy with EDS and image analysis, and automated SEM-EDS mineral analysis using QEMSCAN® technology. Recent projects have included: strontium isotope stratigraphy of the Cretaceous of Antarctica, heavy mineral sediment provenance studies, sedimentology, provenance and diagenesis of the Permo-Trias of the UK, characterisation of the lithology of drill cuttings.

Recent scientific publications
Power, M.R., Pirrie, D., Andersen, J.C.O. & Wheeler, P.D. 2000. Testing the validity of chrome-spinel chemistry as a provenance and petrogenetic indicator. Geology, 28, 1027-1030.

Doyle, P., Poire, D.G., Spalletti, L.A., Pirrie, D., Brenchley, P. & Matheos, S.D. 2005. Relative oxygenation of the Tithonian-Valanginian Vaca Muerta-Chachao formations of the Mendoza shelf, Neuquen Basin, Argentina. Geological Society, London, Special Publication, 252, 185-206.

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