Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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Brief Review on Microbial Enhanced Oil Recovery

미생물을 이용한 원유 회수증진법에 대한 동향연구

  • Oh, Kyeongseok (Department of Chemical.and Environmental Technology, Inha Techincal College)
  • 오경석 (인하공업전문대학 화공환경과)
  • Received : 2021.07.28
  • Accepted : 2021.08.30
  • Published : 2021.08.31
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Abstract

Petroleum oil in reservoir has been acquired by primary, secondary and tertiary oil recoveries. Microbial enhanced oil recovery (MEOR) classified to tertiary oil recovery has been evaluated in two ways of in-situ and ex-situ options. In-situ MEOR injects microbes into a depleted oil reservoir and stimulates those to generate metabolites. Among metabolites, biosurfactants play an important role to make heavy residues flow. Ex-situ MEOR injects microbial metabolites instead of microbes into a reservoir to recover oil. Even though both in-situ MEOR and ex-situ MEOR are eco-friend processes, in-situ MEOR can be preferred because it is more economic. Even though MEOR have been evaluated for a long time, it is still in the state of evaluating in a pilot-scale. Among microbes, bacteria have been widely evaluated in MEOR purpose. In this paper, bacteria for MEOR were summarized and their metabolites were qualitatively evaluated.

유전에 매장된 석유는 1차, 2차, 그리고 3차에 걸쳐 회수된다. 3차 회수로 분류된 공법 중 미생물을 이용한 원유 회수증진법은 크게 in-situ와 ex-situ 공법으로 나눌 수 있다. In-situ 공법은 미생물을 저류층에 직접 투입하여 미생물의 대사활동을 통한 원유의 회수를 유도하는 공법이다. 대사물질 중 바이오 계면활성제는 저류층 잔존 유분의 유동화에 큰 역할을 한다. 한편, ex-situ 공법은 외부에서 미생물의 대사물질을 추출하여 저류층에 투입하여 원유를 회수하는 방법이다. 두 가지 공법 모두 친환경적이지만, 보다 경제적인 in-situ 공법이 선호된다. 미생물을 이용한 원유 회수증진법은 오랜기간 검토되었음에도, 현재까지도 파일럿 규모에서 여전히 평가가 진행 중이다. 본 논문에서는, in-situ 공법에 적용가능한 미생물 중 박테리아의 종 특성과 대사물질에 대해서 살펴보았다.

Keywords

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