Shortcut of Permeability Prediction Rock Typing The Facies Association in Fluvial-Delta Environment

Herianto, Topan and Bintarto, Bambang and Ratnaningsih, Dyah Rini and Muttaqin, Zaki (2016) Shortcut of Permeability Prediction Rock Typing The Facies Association in Fluvial-Delta Environment. In: International Conference on Intergrated Petroleum Engineering & Geosciences, 15 - 17 August 2016, Kuala Lumpur Convention Centre.

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Transitional sedimentary environment experienced two energy-phase (shore and marine) resulting insertion of sand-shale content, will have unusual petrophysic relationship and vertical pattern from well log attribute. Meanwhile the petrophysic (permeability) distribution has to be predicted accurately, well log attribute cannot do, even a simple conventional porosity-permeability semilog plot is firmly used, the fallacy comes. Here we present a methodology of rock typing by integrating geological aspect from 112 detailed core description and well log gamma ray attribute as shortcut to predict permeability that closes to real one. Reservoir rock typing is a process by which geological facies or lithofacies characterized by their dynamic behaviour. Facies and the role of sedimentology could be the base to conduct rock types. Hereby lithofacies is defined by the sedimentary texture. Meanwhile, core description should be done in a great detail, therefore it is recommended to lump or bin lithofacies types into facies association. Gamma ray log that shows vertical stacking pattern of lithofacies (fining-upward, coarsening-upward) explain the system tracts. In this paper we propose integration of the core description and the facies association to be used to produce representative rock types into PGS method. Once established, porosity-saturation-permeability correlations are formed to result permeability equation. Moreover, stratigraphic modified lorenz plot (SMLP) is used to define flow unit in stratigraphic order. The study results 2 rock types based on facies association in PGS method;permeability prediction equation has been valid through routine core data (R=0.9576), hence, it could be used for predicting permeability on the uncored-wells by sequence stratigraphy-correlation for reservoir ‘X’. The SMLP has confirmed 4 flow units which the best flow zone is in coarsening upward pattern. This could be an alternative reservoir characterization using reliable core data which leads to a well-built reservoir model and to know the best layer to be produced.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Ir.Drs Herianto Topan
Date Deposited: 23 Apr 2019 08:49
Last Modified: 23 Apr 2019 08:50

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