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Hierarchical Facies Modeling Driven by Core: A Case Study from SamarangNormal access

Authors: T. Basu, B. Ram Oruganti, S. Sharma, M. Chin, L. Jiang, M. Ramziemran, J. Carlos Moreno, S. B. Shahari, Y. El. Yamani and C. Adnan. B. A Razak
Event name: EAGE/FESM Joint Regional Conference Petrophysics Meets Geoscience
Session: Session Two
Publication date: 17 February 2014
DOI: 10.3997/2214-4609.20132110
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 1.51Mb )
Price: € 20

A novel approach focused on core driven hierarchical facies association for static modeling has been pioneered in the Samarang field, offshore Sabah. The field is located in a structurally complex area representing paleo shoreface environment. The structure as interpreted from the Seismic represents a crestal collapse area. The area of interest is Late Miocene shallow marine section showing repeated progradation and retrogradation within a major regressive clastic wedge that was building towards the NW. Individual Samarang reservoirs were interpreted to portray wave/storm dominated sand bodies forming in upper to middle to lower shoreface and offshore transitional environments, accumulating in a coastal to inner shelf. The upper to middle shoreface sandstones typically were good reservoir quality - massive to laminated sands, whereas the lower shoreface to offshore transitional environment was characterized by poor-quality, bioturbated to heterolithic sands that were formed as event beds during storms. The shales were typically formed in the offshore inner neritic shelfal environment.The methodology described above, provides a robust integration in facies modeling workflow whereby core-driven facies association in a shoreface environment have been captured, characterized, and represented in static and dynamic models.

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