Buenas Correlaciones Estratigráficas Para Modelos En 3-D De Reservorios Carbonatados

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Stratigraphic well correlations for 3-D static modeling of carbonate reservoirs
Jean R. F. Borgomano, Francois Fournier, ¸ Sophie Viseur, and Lex Rijkels

AUTHORS Jean R. F. Borgomano  Laboratoire de Geologie des Systemes et des Reservoirs Car´ ` ´ bonates, case 67, Universite de Provence, 3, ´ ´ Place Victor Hugo, F-13331 Marseille Cedex 03, France;jean.borgomano@univ-provence.fr Jean Borgomano obtained a Ph.D. in carbonate geology in 1987 from the University of Provence in Marseilles, France. In 1988 – 2003, he worked at Shell as a senior carbonate geologist in various exploration and production Shell companies. He is currently a professor at the University of Provence and the director of the Geology of Carbonate Systems and Reservoirs Laboratory. Hisresearch focuses on the geological characterization and numerical modeling of carbonate reservoir architecture and properties. Francois Fournier  Laboratoire de Geo¸ ´ logie des Systemes et des Reservoirs Carbo` ´ nates, case 67, Universite de Provence, 3, Place ´ ´ Victor Hugo, F-13331 Marseille Cedex 03, France; Francois.Fournier@univ-provence.fr Francois Fournier received his M.Sc. degrees ¸ fromthe Nancy School of Mines, France, and from the Institut Francais du Petrole and a Ph.D. ¸ ´ in carbonate sedimentology from the University of Provence in Marseilles, France. After a short experience in oil companies as an exploration geologist in France and Angola, he joined the Geology of Carbonate Systems Laboratory, Marseilles, France, as a lecturer in 2005. His research focuses on therelationship between sedimentology, diagenesis, and seismic reflections in carbonate reservoirs. Sophie Viseur  Laboratoire de Geologie ´ des Systemes et des Reservoirs Carbonates, ` ´ ´ case 67, Universite de Provence, 3, Place Victor ´ Hugo, F-13331 Marseille Cedex 03, France; Sophie.Viseur@univ-provence.fr Sophie Viseur is a numerical geologist working as a researcher at the University of Provence. Shereceived her Ph.D. from the Nancy School of Geology in 2001. Her primary interests are in geostatistics for channel simulations and their application to hydrocarbon exploration and production. In recent years, she has worked in developing methods for the integration of outcrop data and geological concepts into 3-D carbonate architecture models.

ABSTRACT The principles and purposes ofstratigraphic well correlation in carbonate sedimentary systems are defined and discussed within the context of static reservoir modeling. The challenge of well correlations is to relate the heterogeneities measured at core and well scales to the spatial heterogeneities at reservoir and flow unit scales. The introduction of a priori knowledge in the process of stratigraphic well correlation is critical tosupport the stratigraphic rules and to establish a coherent geological and petrophysical concept. The links between well correlation and geostatistics are discussed with regard to the stationarity hypothesis and property trend analysis. We stress that wells are incomplete and biased samples of the geological reality, which is not dependent, unlike the dynamic reservoir behavior, on the wellnumbers, location, and spacing. Stratigraphic rules are applied as a function of the well spacing relative to the geological reality. A simple trigonometric method, combining angle of base profile, paleobathymetry, and well spacing, is introduced to check the validity of the well correlation in carbonate ramp-like systems. Two models, based respectively on outcrop and subsurface with seismic data, arediscussed in detail to show the combined influence of the data set, sedimentary systems, and diagenetic transformations on stratigraphic well correlations.

INTRODUCTION This article discusses the principles of stratigraphic well correlations that form the foundation of most carbonate reservoir models used in hydrocarbon flow simulations. The poor

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