The evaluation of borehole imaging result comparing with cores in Sarvak fractured and non-fractured reservoir

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• 作者：Movahed Zohreh ; Radzuan Junin ; Hassan Amiri Bakhtiary…
• 关键词：OBMI ; UBI and FMI ; Core ; Fracture attribute from OBMI ; UBI and core ; FMI and core permeability ; Limitation of core data
• 刊名：Arabian Journal of Geosciences
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：9
• 期：3
• 全文大小：2,743 KB
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• 作者单位：Movahed Zohreh (1)
  Radzuan Junin (1)
  Hassan Amiri Bakhtiary (2)
  Shahram Taghavi Poor (2)
  Ruhangiz Mohamadian (2)
  Ali Asghar Movahed (3)
  
  1. Faculty of Petroleum and Renewable Energy Engineering, Universiti Teknologi Malaysia (UTM), Johor Bahru, Malaysia
  2. NIOC South, Ahwaz, Iran
  3. RIPI, Ahwaz, Iran
  
• 刊物类别：Earth and Environmental Science
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-7538

文摘

Core samples are still today considered as the standard measurement against all other measurements which must be compared. Core analysis usually focuses on the worse portion of the reservoir due to the fact that core recovery has rarely been well in a highly fractured zone; hence, permeability measured from core sample is often not representative. Core analysis is a common method to identify small-scale fractures of the well and permeability and porosity; however, there are some limitations in the core procedure such as it is highly expensive and unidirectional and has a low recovery coefficient in fractured zone. In contrast, there tends to be a mistrust and even a suspicion of those logging instruments that make measurements which threaten to replicate or even replace the “sacred core.” Thus, image logs are more useful to study the subsurface fractures in these such cases and the logs which come closest to achieving this are the high-resolution micro resistivity (OBMI) and acoustic geological imaging (UBI). The core and OBMI-UBI result was matched in order to verify the log measurements. Furthermore, FMI data were integrated with other open-hole logs to derive a permeability curve. As demonstrated in the case studies, it is believed that the permeability in the basement could be reasonably evaluated using this method. As a result, this exercise has proven to be very valuable, not only for demonstrating the value of the log data, but also it has also highlighted some significant limitations of the core in water-based mud and oil-based mud systems.