I graduated from Keele University with a Masters in Geoscience in 2015. For which I studied the trends produced by fluvial systems in spectral gamma data. During this time, I became adept in gamma ray data collection, interpretation and core logging. The work peaked my interest in petrophysics, sedimentology and stratigraphy leading to the formation of my current Ph.D. project. I completed an internship position with Badley Ashton Americas Limited stationed in Houston, Texas. Following my degree, I held a research position at Keele where I worked with the BGS on the Scottish Carboniferous Research Park and on an in-house project looking into lower Paleozoic of Pembrokeshire, Wales. In September 2016 I began my Ph.D. looking into an integrated approach to fluvial sequence stratigraphical study, utilising the skills I have learnt both during, and after, my undergraduate degree.
Research and scholarship
Fluvial sandstones create some of the highest net to gross clastic reservoirs in the world but the quality of these reservoirs, and recovery from them, are strongly controlled by depositional style. However, the internal architecture of fluvial sandbodies is difficult to ascertain from down-hole data alone, and the rapid spatial and temporal variations in lithofacies make inter-well correlation of fluvial strata notoriously difficult (Bridge and Tye 2000). This study aims to understand the complex nature of sandbody architecture within a high net to gross fluvial reservoir, by using an integrated approach with photogrammetry, pseudo-well log and petrographic data.
The study area chosen to address such issues is the Book Cliffs, Wastach Plateau and Gunnison Plateau, Utah, USA. The formations to be examined are the Lower and Upper Castlegate Sandstone and the Bluecastle Tongue. The successions are large in spatial extent and preserve around two million years of stratigraphy. The successions have previously established sequence stratigraphical models applied to them, however, there are significant discrepancies within these models. This is due to purely sedimentological study with very little in the way of an integrated approach being undertaken. Such limitations have handicapped interpretations of key surfaces and not allowed the previous works to come up with a universal model to fit the succession. This opens a niche for the project, applying a more integrated approach to the analysis of the Castlegate succession may increase the resolution of a certain model or produce a new model-independent structure altogether, for high net to gross fluvial settings.
Mitten, A. J.; Clarke, S. M.; Pringle, J. K. and Richards, P. (2018), Combining Terrestrial Photogrammetry, Applied Sedimentology and Hand-Held Gamma Ray Spectrometry to Characterise the Cretaceous Lower Castlegate Formation, Tuscher Canyon, Utah, U.S.A. AAPG ACE, Salt Lake City, Utah, USA.
Mitten, A. J., Clarke, S. M. & Pringle, J. K. 2017. Facies analysis of the Castlegate Sandstone, Utah: An integrated approach. British Sedimentological Research Group AGM, Newcastle-Upon-Tyne, United Kingdom.
Browne, M. A. E., Ellen, R., Callaghan, E., Mitten, A. J., Leslie, A. G. & Clarke S. M. 2017. Depositional setting of the Namurian Spireslack Sandstone. British Sedimentological Research Group AGM, Newcastle-Upon-Tyne, United Kingdom.
Ellen, R., Browne, M. A. E., Mitten, A. J., Clarke, S. M., Leslie, A. G. & Callaghan, E. 2017. The sedimentology, architecture and depositional setting of the fluvial Spireslack Sandstone of the Midland Valley, Scotland: insights from Spireslack surface coal mine. British Sedimentological Research Group AGM, Newcastle-Upon-Tyne, United Kingdom.
Mitten, A., Pettigrew, R. & Clarke, S.M. 2016. The Basin Dynamics Research Group. Poster. PETEX, Petroleum Geoscience Collaboration Showcase, London, UK.
Mitten, A., Clarke, S. M., Leslie, A. G. & Cain, T. 2016. The Scottish Carboniferous Research Park: Educating geoscientists in fluvial to marginal marine sedimentology and subsurface reservoir analogues. British Sedimentological Research Group AGM, Cambridge, United Kingdom.
Mitten, A., Montenari, M. & Pringle, J. K. 2016. Calciclastic mass flows from the Darriwilian/Sandbian boundary at Abereiddy Bay, Pembrokeshire, Wales, UK: Implications for Avalonian sea-level correlation. British Sedimentological Research Group AGM, Cambridge, United Kingdom.
Ainsworth, J. T., Mitten, A. J. & Pringle, J. K. 2016. A preliminary ground penetrating radar study of fluvial architectures at Spireslack, Ayrshire, Scotland. British Sedimentological Research Group AGM, Cambridge, United Kingdom.
Mitten, A. J., Pringle, J. K. & Clarke, S. M. 2015. Determining the applicability of synthetic gamma ray logs as an analogous method for reservoir quality: Case study from Styrrup Quarry, Doncaster, UK. British Sedimentological Research Group AGM, Keele, United Kingdom.