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AAPG Bulletin

Abstract

AAPG Bulletin, V. 92, No. 6 (June 2008), P. 789-824.

Copyright copy2008. The American Association of Petroleum Geologists. All rights reserved.

DOI:10.1306/02210807078

Stratigraphic well correlations for 3-D static modeling of carbonate reservoirs

Jean R. F. Borgomano,1 Francois Fournier,2 Sophie Viseur,3 Lex Rijkels4

1Laboratoire de Geologie des Systemes et des Reservoirs Carbonates, case 67, Universite de Provence, 3, Place Victor Hugo, F-13331 Marseille Cedex 03, France; [email protected]
2Laboratoire de Geologie des Systemes et des Reservoirs Carbonates, case 67, Universite de Provence, 3, Place Victor Hugo, F-13331 Marseille Cedex 03, France; [email protected]
3Laboratoire de Geologie des Systemes et des Reservoirs Carbonates, case 67, Universite de Provence, 3, Place Victor Hugo, F-13331 Marseille Cedex 03, France; [email protected]
4Maersk Olie og Gas AS, Esplanaden 50, DK-1263 Kobenhavn K, Denmark; [email protected]

ABSTRACT

The principles and purposes of stratigraphic 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 to support 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 well numbers, 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, are discussed in detail to show the combined influence of the data set, sedimentary systems, and diagenetic Previous HittransformationsTop on stratigraphic well correlations.

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