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2012 Vol.49, Issue 4 Preview Page

Review

Petroleum Geology of the North-East Greenland Shelf in the Arctic

북극 그린란드 북동 대륙붕의 석유지질

고재홍

Jaehong Ko

31 August 2012. pp. 557-570
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Abstract
Basin formation and development, sedimentation, stratigraphy, and petroleum geology of the North-East Greenland shelf are scrutinized, for which a new exploration licensing round is on progress. The Jameson Land basin on land, and Danmarkshavn and Thetis basins on shelf have the mean undiscovered, technically recoverable, conventional petroleum resources of 31 Bboe that rank 4th in the Arctic. The basins contain more than 10 km of Devonian through Holocene sedimentary rocks, deposited through several rifting episodes prior to the opening of the North Atlantic Ocean. Multiple source rocks were developed including the Jurassic Hareelv Formation, Permian Ravnefjeld Formation, and lacustrine shales of Devonian and Carboniferous age. Reservoir candidates are synrift conglomerates and sandstones and Permian carbonates. Among them the Middle Jurassic sandstones such as the Vardkløft Group have good porosity and permeability of 21～27% and 263～3,203 md, respectively. Seal rocks include Late Carboniferous and Early Permian evaporites, Ravnefjeld shale, and the Hareelv Formation. The potential traps include synrift structural traps involving fault block tilting, horst, and listric faults, and the stratigraphic traps consisting of Permian carbonate buildups.
Keywords
Arctic
Greenland North-East
Shelf
Petroleum geology
현재 광구 입찰이 진행 중인 그린란드 북동 대륙붕의 분지 형성, 발달, 퇴적, 층서, 석유지질을 종합적으로 분석․고찰하였다. 육상의 Jameson Land 분지와 대륙붕의 Danmarkshavn 및 Thetis 분지의 미발견 회수가능 탐사자원량이 31 Bboe에 달해 북극 지역에서 상위 네 번째이다. 분지들은 북 대서양 생성 이전의 수차례에 걸친 열개운동으로 형성되었으며, 데본기로부터 신생대를 망라하는 두께 10 km 이상의 퇴적층을 포함하고 있다. 근원암은 쥐라기 Hareelv 층을 비롯하여, 페름기 Ravnefjeld 층, 데본기 및 석탄기의 호성 기원 셰일 등으로 충분히 많다. 저류암은 열개 동시성 역암 및 사암과 페름기 탄산염암이 담당하며, 특히 Vardekløft 층군을 비롯한 쥐라기 중기 사암이 공극률 21～27%, 투과도 263～3,203 md로 양호하다. 덮개암은 석탄기 후기～페름기 전기 증발암과 Ravnefjeld 셰일, Hareelv 층 등이 있다. 트랩은 단층블록 회전, 지루, 점완 단층 등에 의한 열개 동시성 구조 트랩과 페름기 탄산염암 상축 등의 층서 트랩이 유망하다.
키워드
북극
그린란드 북동
대륙붕
석유지질
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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 for Geosystem Engineering
  • Journal Title(Ko) :한국지구시스템공학회지
  • Volume : 49
  • No :4
  • Pages :557-570
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