Economic and Environmental Geology (자원환경지질)

The Korean Society of Economic and Environmental Geology (대한자원환경지질학회)
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Geochemical Characteristics of Devonian Bitumen Carbonates in Alberta, Canada

캐나다 데본기 비투멘 탄산염암의 지화학적 특성 연구

  • Kil, Young-Woo (Department of Energy and Resources Engineering, Chonnam National University) ;
  • Kim, Ji-Hoon (Petroleum and Marine Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Choi, Ji-Young (Petroleum and Marine Research Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Park, Myong-Ho (E&P Technology Institute, Korea National Oil Corporation)
  • 길영우 (전남대학교 에너지자원공학과) ;
  • 김지훈 (한국지질자원연구원 석유해저연구본부) ;
  • 최지영 (한국지질자원연구원 석유해저연구본부) ;
  • 박명호 (한국석유공사 석유개발연구원)
  • Received : 2012.04.16
  • Accepted : 2012.08.20
  • Published : 2012.08.28
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Abstract

The objective of this study is to investigate inorganic characteristics of Devonian bitumen carbonates in Alberta using two drilling cores, Saleski 03-34-88-20w4 and Saleski 08-01-88-20w4, taken from the Core Research Center (CRC) of Canada. The bitumen carbonates are mainly composed of less than 0.2 mm dolomites and some carbonate includes small amount of quartz and calcite. The bitumen carbonates from two cores are interpreted to have formed in similar sedimentary environments and dolomitization processes. Carbonates from Saleski 03-34-88-20w4 core were formed under higher inflow of clastic sediment than those from Saleski 08-01-88-20w4 core. Range of crystallization temperature of dolomites in the both bitumen carbonate cores is about 40~$55^{\circ}C$. Dolomitizing fluid of the bitumen carbonates would be Devonian seawater. Bitumen carbonates from Cairn Formation, compared with the CRC cores, have experienced a similar crystallization temperature, but dolmititizing fluid of the bitumen carbonates from Cairn Formation have been modified from the isotopic exchange with continental crust.

이 연구는 캐나다 Core Research Center (CRC) 시추코어 Saleski 03-34-88-20w4와 Saleski 08-01-88-20w4를 이용하여 비투멘을 함유한 캐나다 앨버타주 데본기 탄산염암의 무기 지화학적 특징을 규명하고, 탄산염 저류층에 대한 지화학적 기초자료를 구축하는데 목적이 있다. 대부분이 0.2 mm 이하 크기의 돌로마이트 입자로 구성된 탄산염암은 소량의 석영과 방해석을 포함한다. 두 CRC 코어 탄산염암의 퇴적환경과 돌로마이트화 과정이 유사하나 Saleski 03-34-88-20w4 코어 탄산염암이 Saleski 08-01-88-20w4 코어 탄산염암보다는 쇄설성 퇴적물 유입이 상대적으로 많은 환경에서 형성되었다. 동위원소 분석결과 두 CRC 코어 돌로마이트 생성온도는 약 40~$55^{\circ}C$이고, 돌로마이트 생성 속성수는 데본기 해수이다. 캐나다 앨버타 데본기 Cairn층과 비교한 결과 돌로마이트 생성온도는 같으나, Cairn층은 약간의 대륙기원 암석과 반응한 속성수가 해수에 혼합되었을 가능성이 있다.

Keywords

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