Experimental Study for Validation of Treatment Efficiency of Microbiological Clogging in Underground Hydrocarbon Storage Caverns

Hyeop-Jo Han; Jong-Un Lee

doi:10.12972/ksmer.2017.54.5.459

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2017 Vol.54, Issue 5 Next Page

Research Paper

Experimental Study for Validation of Treatment Efficiency of Microbiological Clogging in Underground Hydrocarbon Storage Caverns 하유류비축기지 내 미생물학적 클로깅의처리 효율성 확인을 위한 실험 연구

31 October 2017. pp. 459-466

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Abstract

Microbiological clogging is a factor that threatens proper operation of water curtain system in underground hydrocarbon storage caverns. Experimental studies were conducted to validate the effectiveness of bioclogging prevention and/or removal method currently used at each storage cavern. After artificial formation of bioclogging onto fracture surfaces of rock cores by injection of sea water or fresh water with nutrients, variations in the amount of discharge water and the number of planktonic bacteria were measured. Effect of bactericide on removal of pre-formed bioclogging was also studied. While the number of planktonic bacteria in sea water increased during clogging formation, it decreased in fresh water. The result indicated that enumeration of planktonic bactertia may not be a quantitative indicator of bioclogging. Bactericide treatment led to removal of planktonic bacteria in water. However, the amount of discharge water decreased again over time, which indicated that bactericide might not effectively remove pre-formed bioclogging.

Keywords

Underground hydrocarbon storage caverns

Microbiological clogging

Planktonic bacteria

Sea water

Bactericide

미생물학적 클로깅 발생은 지하유류비축기지 수장막 시스템의 원활한 운영을 위협하는 요소이다. 이 연구는 현재 각 비축기지에서 수행하고 있는 미생물학적 클로깅 방지 및 제거 방법의 효율성을 실험적으로 확인하고자 수행되었다. 암석 코어 균열면에 영양분과 함께 해수 및 담수를 주입하여 인위적으로 미생물학적 클로깅을 형성한 후 시간에 따른 삼출수량과 자유유영 세균수를 측정하였다. 또한 살균제 주입이 기 형성된 바이오클로깅 제거에 미치는 효과를 조사하였다. 해수를 주입한 경우 클로깅이 발생하면 자유유영 세균수가 증가하였으나 담수의 경우에는 반대로 감소하였으며, 이는 물 시료 내의 자유유영 세균 계수가 바이오클로깅 확인의 정량적 지표가 되지 못할 가능성이 있음을 나타낸다. 바이오클로깅에 살균제를 투여한 결과 해수와 담수 모두 자유유영 세균은 제거되었다. 그러나 삼출수량의 경우 시간이 경과하며 다시 감소하여, 살균제가 바이오클로깅을 형성하고 있는 세균 제거에는 뚜렷한 효과를 발휘하지 못 하는 것으로 나타났다.

키워드

지하유류비축기지

미생물학적 클로깅

자유유영 세균

해수

살균제

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Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 54
No :5
Pages :459-466
Received Date : 2017-07-21
Revised Date : 2017-10-19
Accepted Date : 2017-10-23
DOI :https://doi.org/10.12972/ksmer.2017.54.5.459

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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