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Energies
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Sustainable Energy Solutions Through Microbial Enhanced Oil Recovery
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Sustainable Energy Solutions Through Microbial Enhanced Oil Recovery

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A: Sustainable Energy".

Deadline for manuscript submissions: 20 June 2025 | Viewed by 693

Special Issue Editor

Dr. Kai Cui

E-Mail Website
Guest Editor
School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China
Interests: microbial oil recovery technology; energy; fuel

Special Issue Information

Dear Colleagues,

The microbial enhanced oil recovery (MEOR) technology is a "green and low-carbon" oil production technology that utilizes the unique oil production functions of oil reservoir microorganisms and their metabolites in order to change the physical properties of crude oil or improve the reservoir environment to achieve an increase in oil production from oil wells. There are rich and diverse microbial resources in oil reservoirs, which can be formed into sustainable oilfield microbial-based flooding agents through human intervention and external nutrient activation. Therefore, the microbial-based oil production technology that utilizes the resourcefulness of oil reservoir microorganisms will be the inevitable path for the development of future green and low-carbon oil production technologies, with high academic research value and engineering application prospects. In order to solve the bottlenecks of the current microbial enhancement of oil recovery technology, we hope to generate more academic reports in the areas of microbial activation flooding agents, oil reservoir microbial mutual interaction and cooperation to enhance oil production, and the exploration of unique microorganisms to directly and indirectly increase oilfield recovery rate.

Dr. Kai Cui
Guest Editor

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Keywords

  • utilization of energy-efficient microorganisms for resource recovery
  • green and low-carbon oil production technology
  • nutrient activators
  • petroleum reservoir microbiological ecosystem
  • microbe-based composite oil-pushing agent technology
  • microbe selection

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Published Papers (1 paper)

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Research

14 pages, 1437 KiB  
Article
Enhanced Oil Recovery Mechanism Mediated by Reduced Miscibility Pressure Using Hydrocarbon-Degrading Bacteria During CO2 Flooding in Tight Oil Reservoirs
by Chengjun Wang, Xinxin Li, Juan Xia, Jun Ni, Weibo Wang, Ge Jin and Kai Cui
Energies 2025, 18(5), 1123; https://doi.org/10.3390/en18051123 - 25 Feb 2025
Viewed by 512
Abstract
CO2 flooding technology for tight oil reservoirs not only effectively addresses the challenge of low recovery rates, but also facilitates geological CO2 sequestration, thereby achieving the dual objective of enhanced CO2 utilization and secure storage. However, in the development of [...] Read more.
CO2 flooding technology for tight oil reservoirs not only effectively addresses the challenge of low recovery rates, but also facilitates geological CO2 sequestration, thereby achieving the dual objective of enhanced CO2 utilization and secure storage. However, in the development of continental sedimentary tight oil reservoirs, the high content of heavy hydrocarbons in crude oil leads to an elevated minimum miscibility pressure (MMP) between crude oil and CO2, thereby limiting the process to non-miscible flooding. Conventional physical and chemical methods, although effective in reducing MMP, are often associated with high costs, environmental concerns, and limited efficacy. To address these challenges, we propose a novel approach utilizing petroleum hydrocarbon-degrading bacteria (PHDB) to biodegrade heavy hydrocarbons in crude oil. This method alters the composition of crude oil, thereby lowering the MMP during CO2 flooding, facilitating the transition from non-miscible to miscible flooding, and enhancing oil recovery. Results demonstrated that, after 7 days of cultivation, the selected PHDB achieved a degradation efficiency of 56.4% in crude oil, significantly reducing the heavy hydrocarbon content. The relative content of light-saturated hydrocarbons increased by 15.6%, and the carbon atom molar percentage in crude oil decreased from C8 to C6. Following the biodegradation process, the MMP of the lightened crude oil was reduced by 20.9%. Core flood experiments indicated that CO2 flooding enhanced by PHDB improved oil recovery by 17.7% compared to conventional CO2 flooding. This research provides a novel technical approach for the green and cost-effective development of tight oil reservoirs with CO2 immiscible flooding. Full article
(This article belongs to the Special Issue Sustainable Energy Solutions Through Microbial Enhanced Oil Recovery)
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