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Zohreh M.,University of Technology Malaysia | Junin R.,University of Technology Malaysia | Bakhtiary H.A.,NIOC South | Poor S.T.,NIOC South | And 2 more authors.
Arabian Journal of Geosciences | Year: 2016

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. © 2016, Saudi Society for Geosciences. Source

Khalifeh M.,University of Stavanger | Bagherzadeh H.,RIPI | Izadi M.,Science and Research Branch of IAU
SPE - European Formation Damage Conference, Proceedings, EFDC | Year: 2013

Asphaltene deposition is one serious problem in many of Iranian oil reservoirs. So, a deeper understanding of this phenomenon is essential to prevent its related formation damage and increasing ultimate production through selecting a proper planning. The major goals of this study are (a) investigation of asphaltene deposition on rock surfaces under natural depletion condition during dynamic flow tests, and (b) simulation study of asphaltene-induced permeability damage by using commercial software and evaluation of its strengths and weaknesses. To extend the results of this work, asphaltene deposition and simulation study performed on both carbonate and sandstone rocks. The results of dynamic flow experiments show asphaltene deposition is a continuous process causing permeability impairment and is also partially reversible. Simulation results indicate good matching of the experimental data at final steps of the experiments and it means that software should be modified respect to modeling of asphaltene deposition. In addition, surface deposition and entrainment mechanisms are more important in carbonate rocks than sandstones while pore plugging mechanisms depends on the pore size distribution of the rock and it may play same role in carbonate and sandstone rocks. The simulation model considers constant values for adsorption and plugging coefficient, while these coefficients are changing during experiment. All the tests are performed and simulated in accordance to reservoir condition and oil production rate of wells. © 2013, Society of Petroleum Engineers. Source

The invention related to a nano-structured catalyst system for removing mercaptans and/or H

Kamalipour M.,ICOFC | Shahrabadi A.,RIPI
SPE Middle East Oil and Gas Show and Conference, MEOS, Proceedings | Year: 2013

In reality the rate of a production well is not constant and varies in time so the producing responses would be noisy. De-convolution is a method of converting a variable rate distorted pressure profile into the pressure profile for an equivalent constant rate production sequence. There are two methods used for de-convolving distorted pressure data: Beta De-convolution and material balance de-convolution methods. The application of both methods was tested in well test analysis of a naturally fractured reservoir. The end of well bore storage was estimated by both methods, and then the reservoir data were analyzed by well testing software. The calculated permeability, interaction coefficient and storativity ratio are different in both approaches. The comparison of data shows that the material balance method predicts the pressure response better and is suggested for applying in field cases. Copyright 2013, Society of Petroleum Engineers. Source

Home > Press > Application of Nanocomposite Membranes in Fuel Cells to Produce Green Energy Abstract: The application of fuel cells increases every day in various industries due to the importance of using sustainable and green energy sources. Fuel cells have important applications in transportation industry, power plants (including domestic, commercial and industrial), portable electronic devices, including cell phones and laptops, and other issues. Therefore, it is necessary to carry out researches on the production of various types of membranes to be used in fuel cells. In order to reduce production costs, researchers from Iran's Research Institute of Petroleum Industry (RIPI) succeeded in the production of nanocomposite membranes to be mostly used in the structure of fuel cells. Membranes that are currently used in fuel cells are usually expensive and they have short life. The method presented in this research to produce membranes is simple and cost-effective, and the membranes synthesized through this method are cheaper but more durable in comparison with the similar samples in the market. A new type of nanocomposite proton exchanging polymeric membranes based on polyvinyl alcohol and fumed silica nanoparticles attached to the hydrophilic polymer was produced through aqueous solution casting method to develop novel methods in the production of high temperature membranes. The structure and performance of the membranes were tested by using various experiments. Based on the results, the presence of hydrophilic polymeric chains on fumed silica nanoparticles increases characteristics, including proton conduction and mechanical strength, of polymeric membranes. It means an increase in the resistance and life of the membranes. The results of the research have been published in Polymer Science, section Polymer Membranes, vol. 57, issue 5, 2015, pp. 667-674. For more information, please click If you have a comment, please us. Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

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