[CCoE Notice] Floriane_Youzan_MS_Defense

[Knudsen, Rachel W]

Monday, December 7, 2020

2:00 PM – 4:00 PM CST

Zoom link: https://urldefense.com/v3/__https://uofh.zoom.us/j/5788126921__;!!LkSTlj0I!SrKBeeaZPSggQMvpL6aCI5mYgothcj6O_wdgQQv_ZQz-fSBPh2X37Iva50wDZSG59po$ 

Meeting ID: 578 812 6921

Floriane Seka Youzan


Petroleum M.S. Thesis Defense


Advisor: Dr. Kyung Jae Lee


Committee Members: Dr. Christine Ehlig-Economides, Dr. S.M. Farouq-Ali


“Microbial Enhanced Oil Recovery for Permeability Increase by Decomposing Hydraulic Fracturing Fluid Adsorbed on Shale Minerals”


Abstract

Primary and secondary recovery methods are usually not sufficient to maximize the oil recovery especially with shale minerals whose permeability can be more compromised with hydraulic fracturing fluid. Indeed, more than 40% of the Oil Initially in Place (OIIP) is left in the reservoir after implementing these recovery methods. To solve the issue at hand, petroleum engineers have at their disposition a plethora of tertiary recovery methods such as chemical flooding, thermal recovery, and microbial enhanced oil recovery (MEOR). In this thesis, we propose the use of MEOR: a technique that uses naturally occurring microbes in the reservoir or injected microbes to enhance the oil recovery. This approach is particularly attractive because it is inexpensive and most importantly environmentally friendly. This thesis begins by reviewing past and pertinent literature about MEOR. The MEOR simulation is implemented using the in-house MEOR numerical simulator which is derived from the TOUGH2 family of code. By applying this methodology, we demonstrate the effectiveness of MEOR by comparing the results between the cases applying MEOR and not applying MEOR. We also conduct a sensitivity analysis to investigate the impact of parameters relevant to microbial activity to the system responses and production behavior. The parameters relevant to microbial activity include the mass fraction of substrate in aqueous phase (X_HAcA), mass fraction of microbes in aqueous phase (X_MBA), yield coefficient of microbes (Y), maximum microbial growth rate (µmax), maximum temperature for microbial growth (Tmax), and microbial death rate (δ). The system responses include the pressure, temperature, effective porosity, permeability, production rates and cumulative productions of aqueous phase, liquid organic phase, and gaseous phase. The results of sensitivity analysis reveal the relative importance of each parameter controlling MEOR in predicting the MEOR performance and consequent production enhancement.

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