Numerical simulation of an oil viscosity reduction microbe for enhanced oil recovery

E. O. Ansah, Y. Sugai, K. Sasaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This research model Microbial Enhanced Oil Recovery (MEOR) using two known simulators: UTCHEM and PHREEQC. We elucidate of environmental conditions effect on MEOR process by using real experimental data of an oil-degrading bacteria. Our work differs from previous research in that, we model MEOR operations with emphasis on oil viscosity reduction. Also, we elaborate on the geochemical reactions involved with nutrient/brine injection into oil reservoirs prior to and during microbial. PHREEQC was used to simulate the hydrochemistry reactions between the synthetic formation brine and the pulsating nutrient (yeast extract – nitrogen source)/brine solution in the absence of microbe. Hitherto, we modelled the enhancement of oil viscosity by assuming production of gases and by the direct action of the microbe on heavy hydrocarbon chains using UTCHEM. It was observed that the geochemical and transport model depicts the precipitation of Calcite as well as the dissolution of K-Feldspar. There was the evolution of CO2 and CH4 gases. Moreover, altering temperature and pH, appreciably affected the saturation indices of the various phases. The enhancement of oil recovery reached 10% by increasing the yeast extract concentration from 50 mg/l to 500 mg/l at a salinity of 10 g/l and temperature of 60 degrees Celcius.

Original languageEnglish
Title of host publication80th EAGE Conference and Exhibition 2018
Subtitle of host publicationOpportunities Presented by the Energy Transition
PublisherEuropean Association of Geoscientists and Engineers, EAGE
ISBN (Electronic)9789462822542
Publication statusPublished - Jan 1 2018
Event80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition - Copenhagen, Denmark
Duration: Jun 11 2018Jun 14 2018

Publication series

Name80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition

Conference

Conference80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition
CountryDenmark
CityCopenhagen
Period6/11/186/14/18

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All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

Ansah, E. O., Sugai, Y., & Sasaki, K. (2018). Numerical simulation of an oil viscosity reduction microbe for enhanced oil recovery. In 80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition (80th EAGE Conference and Exhibition 2018: Opportunities Presented by the Energy Transition). European Association of Geoscientists and Engineers, EAGE.