Abstract
This chapter provides detailed information about microbial enhanced oil recovery (MEOR) including microbial ecology, microbe types, corresponding nutrients, applying approaches, role of produced biochemicals, MEOR mechanisms, constraints and screening criteria, field trials, enzyme enhanced oil recovery (EEOR), and genetically engineered MEOR (GEMEOR). Initially, a brief introduction is prepared addressing the importance of tertiary enhanced oil recovery, especially MEOR. Less efforts have been made to elucidate the details of macroscopic and microscopic sweep efficiency as they are well explained in previous chapters. The microbiology part concentrates on the deep subsurface environment, different microorganisms’ types, and their actions. The roles of different produced biochemicals are thoroughly explained and the involving mechanisms are fully described. At the next part, the screening criteria for MEOR and also constraints are debated. A history of field trials is provided to denote the MEOR applicability. At the end, two concepts of EEOR and GEMEOR are described.
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