Author Archives: admin

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Geological Boundary Detection in JPSE

Category : New publication

Congratulations to Mohammad Amin Partovi, Msc student of petroleum engineering, for his recently published work about geological boundary detection from well-logs using pattern recognition techniques in Petroleum Science & Engineering.

In this study, we implemented an automatic well-to-well correlation approach based on pattern extraction from well-logs. The well-log patterns were recognized by calculating several statistical and fractal parameters. As a fractal parameter, we selected the wavelet standard deviation exponent, calculated by the discrete wavelet transform. Furthermore, to select the proper wavelet function, the energy to Shannon entropy ratio criterion was implemented. The statistical pattern recognition parameters of this study include average value, maximum to minimum ratio, coefficient of variation, and the trend angle of well-log data (i.e., Gamma ray log) in a window around the geological boundary. Moreover, the analysis of variance (ANOVA) tool and the Tukey multiple comparison method were implemented to evaluate the effectiveness of each parameter (i.e., fractal or statistical parameters) during the determination of boundary depths. The gamma ray logs from three wells of an oil field were used as a dataset for the evaluation of our algorithm. The outputs of our methodology were also compared with the new detrended fluctuation analysis (DFA) method, which show promising outcomes over it. The results show that the average value of the signal, among the analyzed parameters, is the most effective parameter; however, implementing the combination of all fractal and statistical parameters can improve the accuracy of the geological boundary detection.

 


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Modeling reaction flow in porous media

Category : Uncategorized

Congratulations to Hossein Younesian-Farid, Msc student of petroleum engineering, for his recently published work about reaction flow of pH-sensitive polymer flooding in Petroleum Science & Engineering.

 

In this study, he developed a mathematical model to predict the acid pre-flush behavior before pH-triggered polymer flooding. Convection, diffusion, and homogeneous/heterogeneous geochemical reactions for a slightly compressible fluid flow in porous media was formulated.  The introduced model was validated against the experimental data. He simulated the injection of several acids (strong and weak acids) into a carbonate rock under different flow conditions (i.e., different Damkohler numbers). The obtained pH values reveal that weak acids can provide better results for acid pre-flushing in carbonate formations.

Figure: Different steps of pH-triggered polymer flooding. a) Water breakthrough during conventional water flooding process because of its flowing through high permeability areas; b) acid pre-flush in order to decrease the pH of the high permeable areas; c) Injection of pH-triggered polymer that has low viscosity in an acidic environment; d) Post water flooding with the  higher sweep efficiency in comparison to (a).


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PermLab in OGPC2018

Category : Achivements

The PermLab team members have participated in OGPC2018 with three great papers,

  • Hossein with the paper entitled: Simultaneous Modeling of Homogeneous and Heterogeneous Reactions to Estimate Porosity Refinement during Carbonate Acidizing.
  • Nader’s paper was: Characterization of condensate banks using wavelet transform analysis of well test data
  • and Alireza with the paper of: Formation Damage Analysis of Organic Acids with Limestone Rocks during Acidizing: A Case Study on an Iranian Carbonate Formation

 


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PermLab in IAMG2018

Category : New publication

Permlab has participated in IAMG2018, Olomouc, Czech Republic with two papers,

1-“Reconstruction of vugular carbonate rocks by pore network modeling and image-based network technique”, which was a collaboration between PermLab at TMU and PMEAL research group at Waterloo University.

2-“Modeling and simulation of geochemical reactions during acid pre-flush to improve conformance control of pH-sensitive polymer flooding” written by Hossein Younesian-Farid from PermLab.


Ali published his first paper

Category : New publication

Congrats to Ali Soltani for his publication in PhysicaA. This work models scaling & critical properties of percolation-like porous media. Both site & continuum systems with different well configurations were analyzed.


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Amin received the best student prize

Category : Achivements

Congratulate Amin Partovi who received the university prize for the “Best MSc thesis” of the faculty of chemical engineering in 2017. This annual prize is made for thesis considered to be the best within each faculty based on their outputs. Hope to attain many more successes in his next steps of life.


Receiving a new grant

Category : Achivements

The Iranian National Science Foundation have just granted Dr. Sadeghnejad and the Permlab group for a research program about investigation of pH-sensetive polymer flooding. This award is for a period of 18 months.