Effects of sandstone provenance on reservoir quality preservation in the deep subsurface: Experimental modelling of deep-water sand in the Gulf of Mexico
Published:January 01, 2014
Rick C. Tobin, D. Schwarzer, 2014. "Effects of sandstone provenance on reservoir quality preservation in the deep subsurface: Experimental modelling of deep-water sand in the Gulf of Mexico", Sediment Provenance Studies in Hydrocarbon Exploration and Production, R. A. Scott, H. R. Smyth, A. C. Morton, N. Richardson
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Deep-water turbidite sandstone reservoirs in the Gulf of Mexico have been sourced from a variety of provenance terrains. As a result, the framework composition of each reservoir in the basin varies widely, including volcanic-rich litharenite (Oligocene Vicksburg), feldspathic-rich lithic arkose (Oligocene Frio), metamorphic-rich feldspathic litharenite (Palaeogene Wilcox), lithic-poor quartzarenite (Miocene), quartz-rich sublitharenite (Cretaceous) and quartz- and feldspar-rich subarkose (Norphlet).
Provenance-driven differences in composition have a complex but critical influence on how each of these reservoirs responds to burial-induced changes in depth, fluid pressure, effective stress and temperature. A combination of Petromod® and Touchstone™ modelling programs are used in this study to simulate the influence of provenance on compaction and cementation of the main reservoir types in the Gulf of Mexico. For example, modelling results predict that at higher levels of thermal exposure, some lithic-rich sands, although more ductile and highly compacted, will experience less quartz cementation than less ductile, quartz-rich sands, thereby preserving a higher range of porosity and permeability. Furthermore, modelling results predict that temperature/effective stress/depth windows for optimal reservoir quality preservation vary widely depending on sandstone provenance.
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Sediment Provenance Studies in Hydrocarbon Exploration and Production
Sediment provenance studies concern the origin, composition, transportation and deposition of detritus and therefore are an important part of understanding the links between basinal sedimentation, and hinterland tectonics and unroofing. Such studies can add value at many stages of hydrocarbon exploitation, from identifying regional-scale crustal affinities and sediment dispersal patterns during the earliest stages of exploration, to detailed correlation in producing reservoirs and understanding the impact of mineralogy on reservoir diagenesis.
The volume showcases the wide variety of techniques available, using examples and applications from all aspects of sediment provenance research. The papers are organized into four sets around the following themes:
Overview: applications of provenance information in hydrocarbon reservoir sandstones
Provenance, diagenesis and reservoir quality
Provenance studies linking sediment to source
Looking forward: development of techniques and data handling
This book is dedicated to the memory of Maria Mange and Robert A. Scott.