By C. J. R. Braithwaite, G. Rizzi, G. Darke
The huge distribution of dolomite rocks in North American, center- and Far-Eastern hydrocarbon reservoirs is cause sufficient for his or her in depth examine. during this quantity dolomite fanatics evaluation development and outline the present obstacles of dolomite study, comparable fairly to the significance of those rocks as reservoirs. As can be anticipated, reports supply serious analyses of prior principles on origins and why many aren't any longer tenable. Discussions variety among conceptual versions and numerical simulations of the movement paths of dolomitizing fluids, geochemical modelling, and microbial mediation. Case experiences from components as assorted as North the United States, the center East, South-east Asia and Australia offer an exceptional historical past yet illustrate vital changes in perspectives at the origins of those enigmatic rocks. additionally to be had: New suggestions in Sediment center research - ISBN 1862392102 Hydrocarbons in Crystalline Rocks (Geological Society certain ebook) - ISBN 1862391378 The Geological Society of LondonFounded in 1807, the Geological Society of London is the oldest geological society on the planet, and one of many greatest publishers within the Earth sciences.The Society publishes a variety of top quality peer-reviewed titles for lecturers and pros operating within the geosciences, and enjoys an enviable foreign acceptance for the standard of its work.The many components within which we put up in include:-Petroleum geology-Tectonics, structural geology and geodynamics-Stratigraphy, sedimentology and paleontology-Volcanology, magmatic reviews and geochemistry-Remote sensing-History of geology-Regional geology publications
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Extra resources for Geometry and Petrogenesis of Dolomite Hydrocarbon Reservoirs (Geological Society Special Publication No. 235)
Along crystal boundaries. (D) SEM of porous dolomite domain (right in B). The crystals are also planar-s but much larger than those in (C), and there is significant intercrystalline porosity and permeability. 24 H. G. MACHEL Fig. 9. Development of matrix-selective dolomitization, subsequent dissolution of unreplaced biochems (mainly brachiopods), marginal recrystallization around moulds, and subsequent partial dissolution of dolomite. All samples are from the Upper Devonian Grosmont Formation, Alberta, Canada.
Amthor et al 1993, 1994). The claim that most dolostones are more porous and permeable than limestones is contentious, van Tuyl (1914, p. 259) stated that 'Some dolomites are very compact, but most of them are vesicular and porous', a view held for many years. Schmoker & Halley (1982) and Halley & Schmoker (1983), however, demonstrated with porosity-depth profiles of Cenozoic carbonates in southern Florida that many dolostones that have not been buried too deeply (less than about 1 km) have porosities equal to or less than those of adjacent limestones.
If these processes can be quantified, the diagenetic evolution of a dolomitized rock unit could be used as a predictor for the petrophysical properties of the resulting dolostone reservoir unit (Woody et al. 1996). Dolomite geochemistry A wide range of geochemical methods may be used to characterize dolomites and dolostones, and to decipher their origins. g. Land 1980; Tucker & Wright 1990; Allen & Wiggins 1993; see also various case studies in Purser et al. 1994). This paper cannot discuss all of these possibilities, most of which are adequately covered in the references cited.