Reservoir geology

Introduction and Commercial Application The objective of reservoir geology is the description and quantification of geologically controlled reservoir parameters and the prediction of their lateral variation. Three parameters broadly define the reservoir geology of a field  

To a large extent the reservoir geology controls the producibility of a formation, i.e. to what degree transmissibility to fluid flow and pressure communication exists. Knowledge of the reservoir geological processes has to be based on extrapolation of the very limited data available to the geologist, yet the geological model s the base on which the field development plan will be built. 

In the following section we will examine the relevance of depositional environments, structures and diagenesis for field development purposes. 

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To derive a reservoir geological model various methods and techniques are employed mainly the analysis of core material, wireline logs, high resolution seismic and outcrop studies. These data gathering techniques are further discussed in Sections 5.3 and 2.2. 

The next-lowest-cost storage is likely to be at depleted oil and gas fields, where reservoir geology is already known, wells suitable for injection of C02 may have already been drilled, relevant permits may already exist, and subsurface rights may be well defined. 

Bizzarro M., Simonetti A., Stevenson R., and David J. (2002) Hf isotope evidence for a hidden mantle reservoir. Geology 30, 771-774. 

Clayton, C.J. (1994) Microbial and organic processes. In Quantitative Diagenesis Recent Developments and Applications to Reservoir Geology (Eds Parkers, A. Sellwood, B.W.). NATO ASl Series C Mathematical and Physical Sciences, 453, 125-160. Kluwer Academic, Dordrecht. 

Gibbons, K., Hellem, T., Kjemperud, A., Nio, S.D. Vebenstad, K. (1993) Sequence architecture, facies development and carbonate-cemented horizons in the Troll Field reservoir, offshore Norway. In Advances in Reservoir Geology (Ed. Ashton, M.). Spec. Publ. Geol. Soc. Lond., 69, 1-31. 

Bryant, I.D. Flint, S.S. (1993) Quantitative clastic reservoir geological modelling problems and perspectives. In The Geological Modelling of Hydrocarbon Reservoirs and Outcrop Analogues (Eds Flint, S.S. Bryant, I.D.). Spec. Publ. Int. Ass. Sediment., 15, 3-20. 

Cubitt, J. M. England, W. A. (eds) 1995. The Geochemistry of Reservoirs. Geological Society, London, Special Publications, 86. 

Smalley, P. C., Dodd, T. A., Stockden, I. L., Raheim, A. Mearns, E. W. 1995. Compositional heterogeneities in oilfield formation waters identifying them, using them. In Cubitt, J. M. England, W. A. (eds) The Geochemistry of Reservoirs. Geological Society, London, Special Publications, 86, 59-69. 

Smalley, P. C., Goodwin, N. S., Dillon, J. F., Bidinger, C. R. Drozd, R. J. 1996. New tools target oil quality sweetspots in viscous oil accumulations. In Proceedings, Volume W Formation Evaluation and Reservoir Geology. Society of Petroleum Engineers, Annual Technical Conference, Denver, 911-917. 

Three Gorges reservoir geological hazards prevention headquarters. 2012. Technical requirements of geological engineering investigations for geological hazard in Three Gorges Reservoir area, (in Chinese)... 

In damage assessment, it is necessary first to find information on the reservoir geology, as well as the mineralogy. An understanding of the rock type (sandstone or carbonate) and other features, including permeability and porosity, is critical. This includes the nature of porosity (matrix versus naturally fractured) and how permeability is distributed (i.e., how it varies) across the producing interval—or the injection interval, as the case may be. 

Fein JB (1991a) Experimental study of aluminum-, calcium- and magnesium-acetate complexing at 80°C. Geochim Cosmochim Acta 55 955-964 Fein JB (1991b) Experimental study of aluminum-oxalate complexing at 80 °C implications for the formation of secondary porosity within sedimentary reservoirs. Geology 1037-1040... 

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