Application of artificial neural networks for the prediction of carbonate lithofacies, based on well log data, Sarvak Formation, Marun oil field, SW Iran

Document Type: Research Paper

Authors

Department of Geology, Faculty of Science, Bu-Ali Sina University, Hamedan, Iran

Abstract

Lithofacies identification can provide qualitative information about rocks. It can also explain rock textures which are important
components for hydrocarbon reservoir description Sarvak Formation is an important reservoir which is being studied in the Marun oil
field, in the Dezful embayment (Zagros basin). This study establishes quantitative relationships between digital well logs data and
routine petrographic data, obtained from thin sections description. Attempts were made to predict lithofacies in 13 wells, all drilled in
the Marun oil field. Seven well logs, namely, Gamma Ray (SGR and CGR), Deep Resistivity (RD), Formation Density (RHOB),
Neutron Porosity (PHIN), Sonic log (DT), and photoelectric factor (PEF) as input data and thin section/core-derived lithofacies were
used as target data in the ANN (artificial neural network) to predict lithofacies. The results show a strong correlation between the given
data and those obtained from ANN (R²= 95%). The performance of the model has been measured by the Mean Squared Error function
which doesn't exceed 0.303. Hence, neural network techniques are recommended for those reservoirs in which facies geometry and
distribution are key factors controlling the heterogeneity and distribution of rock properties. Undoubtedly, this approach can reduce
uncertainty and save plenty of time and cost for the oil industry.

Keywords


Article Title [Persian]

کاربرد شبکه عصبی برای پیش بینی رخساره های سنگی سازند کربناته بر پایه داده های چاه نگاری، میدان نفتی مارون، جنوب غرب ایران.

Authors [Persian]

  • حسن محسنی
  • موسی اسفندیاری
  • الهام حبیبی اصل

Keywords [Persian]

  • سازند سروک
  • شبکه عصبی
  • ویژگی مخزنی
  • رخساره سنگی
  • حوضه زاگرس
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