Econ. Environ. Geol. 2010; 43(2): 85-100

Published online April 30, 2010

© THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY

Geochemical Characteristics of Devonian Cairn Formation in Alberta, Canada

Myong-Ho Park1, Ji-Hoon Kim2, Sung-Dong Lee1, Jiyoung Choi2,3 and Yong-Woo Kil2*

1E&P Technology Institute, Korea National Oil Corporation, Anyang, Gyeonggi-do 431-711, Korea
2Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Korea
3Division of Marine Environment & Bioscience, Korea Maritime University, Busan, 606-791, Korea

Correspondence to :

Yong-Woo Kil

ykil@kigam.re.kr

Received: February 9, 2010; Accepted: April 6, 2010

Abstract

Devonian Cairn Formation is one of the important hydrocarbon reservoirs in Alberta, Canada. However, the Cairn Formation, outcropped in the study area, is not prospective reservoir with poor porosity and permeability by some late diagenetic processes. In this study, geochemical characteristics of the Cairn Formation were studied to use these preliminary results for advanced geological and geophysical petroleum explorations in the near future. Rock-Eval pyrolysis showed that total organic carbon content is less than 0.3 wt.%, indicating a minor amount of bitumen and/or other hydrocarbons. The carbonates in the Cairn Formation are mainly composed of subhedral and
anhedral dolomites. Pore sizes in the carbonate are various, ranging from nanometer to micrometer. Clastic sediments increase in the upper and lower parts of the Cairn Formation, probably due to changing its depositional conditions. The Cairn Formation can also be divided into several intervals based on Ca/Mg ratio in dolomite and degree of amount of calcite. These could be formed by different sedimentary environment, degree of cementation and recrystallization, different saline/fresh water, etc.

Keywords Carbonate bitumen, Cairn Formation, diagenesis, Devonian, Alberta

Article

Econ. Environ. Geol. 2010; 43(2): 85-100

Published online April 30, 2010

Copyright © THE KOREAN SOCIETY OF ECONOMIC AND ENVIRONMENTAL GEOLOGY.

Geochemical Characteristics of Devonian Cairn Formation in Alberta, Canada

Myong-Ho Park1, Ji-Hoon Kim2, Sung-Dong Lee1, Jiyoung Choi2,3 and Yong-Woo Kil2*

1E&P Technology Institute, Korea National Oil Corporation, Anyang, Gyeonggi-do 431-711, Korea
2Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, Korea
3Division of Marine Environment & Bioscience, Korea Maritime University, Busan, 606-791, Korea

Correspondence to:

Yong-Woo Kil

ykil@kigam.re.kr

Received: February 9, 2010; Accepted: April 6, 2010

Abstract

Devonian Cairn Formation is one of the important hydrocarbon reservoirs in Alberta, Canada. However, the Cairn Formation, outcropped in the study area, is not prospective reservoir with poor porosity and permeability by some late diagenetic processes. In this study, geochemical characteristics of the Cairn Formation were studied to use these preliminary results for advanced geological and geophysical petroleum explorations in the near future. Rock-Eval pyrolysis showed that total organic carbon content is less than 0.3 wt.%, indicating a minor amount of bitumen and/or other hydrocarbons. The carbonates in the Cairn Formation are mainly composed of subhedral and
anhedral dolomites. Pore sizes in the carbonate are various, ranging from nanometer to micrometer. Clastic sediments increase in the upper and lower parts of the Cairn Formation, probably due to changing its depositional conditions. The Cairn Formation can also be divided into several intervals based on Ca/Mg ratio in dolomite and degree of amount of calcite. These could be formed by different sedimentary environment, degree of cementation and recrystallization, different saline/fresh water, etc.

Keywords Carbonate bitumen, Cairn Formation, diagenesis, Devonian, Alberta

    KSEEG
    Jun 30, 2024 Vol.57 No.3, pp. 281~352

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