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AAPG Bulletin

Abstract

AAPG Bulletin, V. 93, No. 11 (November 2009), P. 1517ndash"1533.

Copyright copy2009. The American Association of Petroleum Geologists. All rights reserved.

DOI:10.1306/07270909041

Two-dimensional simulation of controls of Previous HitfractureNext Hit parameters on Previous HitfractureNext Hit connectivity

Kajari Ghosh,1 Shankar Mitra2

1School of Geology and Geophysics, University of Oklahoma, Norman, Oklahoma 73019; present address: ExxonMobil Development Company, Houston, Texas; kajari.ghosh@exxonmobil.com
2School of Geology and Geophysics, University of Oklahoma, Norman, Oklahoma 73019; smitra@ou.edu

ABSTRACT

Two-dimensional Previous HitfractureNext Hit simulation is conducted to analyze the controls of different Previous HitfractureNext Hit parameters (variations in Previous HitfractureNext Hit orientation, density, and length) on Previous HitfractureNext Hit network connectivity. Three different scenarios, which are commonly encountered in natural Previous HitfractureNext Hit systems, are analyzed: (1) a single Previous HitfractureNext Hit set; (2) two Previous HitfractureNext Hit sets, with one primary through going set; and (3) two Previous HitfractureNext Hit sets with approximately equal parameters. The modeling reveals that certain parameters are more dominant in controlling the connectivity for each of the settings. For a single set of fractures, increases in length and dispersion and a decrease in spacing all result in higher Previous HitfractureNext Hit-parallel connectivity, but the decrease in spacing is the most important in increasing Previous HitfractureNext Hit-normal connectivity, especially where the dispersion in Previous HitfractureTop strike is very low. Simulations of two sets of fractures reveal that the density, length, and angle between the two sets are important factors in producing complete connectivity. In cases where one set of fractures is a systematic throughgoing set, a critical combination of length of the second set and the angle between the two sets results in complete connectivity. Where both sets of fractures have varying length and density, the influence of increasing density of one set has a great effect on connectivity when the other set is short and a more subtle to insignificant change when the other set is long. The network also shows higher connectivity with increasing angles (up to 90deg) between the two sets.

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