--> Abstract: Hierarchical Framework Basis for Multi-Scale Khuff Reservoir Modeling, by Michael C. Poppelreiter, Erwin Adams, Thomas Aigner, Joachim Amthor, Sulaiman Al-Kindi, Gerard Bodewitz Adams, Sharon Finlay, and Gert-Jan Reijnders; #90077 (2008)

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Hierarchical Framework Basis for Multi-Scale Khuff Reservoir Modeling

Michael C. Poppelreiter1*, Erwin Adams2, Thomas Aigner3, Joachim Amthor1, Sulaiman Al-Kindi1, Gerard Bodewitz Adams2, Sharon Finlay1, and Gert-Jan Reijnders1
1Shell, Qatar
2Shell, Netherlands
3Tuebingen University, Germany
*[email protected]

The Khuff platform is a carbonate-evaporite ramp with wide facies belts that experienced a multi-phase diagenesis. This resulted in a complex pore-type architecture with a wide scatter of petrophysical properties. Traditionally, lithostratigraphic correlations, tailored to environmentally specific facies successions, were used as layering schemes. Such correlations, although locally robust, become uncertain when crossing facies or property boundaries. In order to build robust subsurface models, we employed a hierarchical layering scheme, based on a combination of different tools such as sequence stratigraphy and acoustic impedance contrasts. The purpose of this approach was to link data from exploration to pore scale in a genetic framework. At the highest-level faults and key markers, derived from seismic were used to build the structural framework. An intermediate acoustic level was established from the integration of well data, blocked open-hole log and synthetics using a Shell in-house tool. The next level was based on correlatable Khuff facies sequences. The lowest level was populated with geobodies based on outcrop analogue studies from the Oman Mountains that integrate LIDAR, global positioning system data (GPS) and outcrop gamma-ray logs. This hierarchical approach allowed partitioning of the complex Khuff property continuum into genetically related classes: matrix pores, fault-related solution-enlarged pores and facture pores in genetically related layers and structural elements. Thus, a hierarchical framework was established; (Level 1) key seismic markers; (Level 2) acoustic boundaries; (Level 3) Khuff facies sequences that are infilled at (Level 4) with geobodies. An example of the workflow from the Yibal field of northern Oman will be shown.

 

AAPG Search and Discovery Article #90077©2008 GEO 2008 Middle East Conference and Exhibition, Manama, Bahrain