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2011 Vol.48, Issue 4 Preview Page
Petroleum Geology of the Arctic Barents Sea

북극 바렌츠 해 지역의 석유지질

고재홍

Jaehong Ko

31 August 2011. pp. 499-523
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Abstract
The Barents Sea is an epicontinental sea bordering Russia and Norway, for which the mean undiscovered, conventional, technically recoverable petroleum resources are estimated to be approximately 11 Bb of crude oil, 380 Tcf of natural gas and 2 Bb of natural gas liquids. The Barents Sea hosts the giant Shtokman gas field with the recoverable reserve of 130+ Tcf and the Snøhvit field that is the first major producing field in the Arctic offshore. Source rocks are present at all stratigraphic intervals from the Paleozoic to the Cenozoic, and more prolific is the Jurassic Hekkingen Formation with 10～15 wt.% total organic carbon and hydrogen indices of 280～350 mgHC/gTOC. The most productive reservoirs are the Jurassic Stø Formation and its equivalents that were deposited in prograding coastal regimes, and show an average porosity greater than 15% and permeability up to 1 d. Seal rocks are ubiquitous due to frequent transgressions. The Mesozoic reservoirs are sealed by two formations, the Hekkingen Formation and the Fulgen Formation. The traps in the rift dominant west are generally fault-bounded positive blocks. In contrast simpler dome-like structures by folding developed in the eastern deep sag basin. Paleozoic carbonate reefs, traps associated with salt movement, and erosion-related stratigraphic and structural traps are so far unsuccessful yet, but certainly have the potential.
Keywords
Arctic
Barents Sea
Petroleum system
바렌츠 해는 러시아와 노르웨이에 걸쳐있는 연해로, 회수가능 매장량 130+ Tcf의 거대 가스전인 Shtokman을 비롯하여 북극 지역 원양에서 최초로 본격적인 개발·생산이 이루어지고 있는 Snøhvit 가스전 등이 있으며, 가스 380 Tcf, 석유 11 Bb, NGL 2 Bb이 미발견으로 남아 있다. 근원암은 고생대로부터 신생대까지 거의 모든 지질시대에 걸쳐 분포하며, 특히 쥐라기 Hekkingen 층은 총유기탄소 10～15 wt.%, 수소지수 280～350 mgHC/gTOC로 높은 잠재력을 지닌다. 저류암은 Stø 층 등 쥐라기 연안환경에서 퇴적된 사암으로 평균 공극률 15% 이상, 유체투과도 최대 1 d이다. 덮개암은 해침의 반복으로 다수의 양호한 셰일 층이 산재하며, 중생대 저류암에 대해서는 Hekkingen 및 Fulgen 층이 담당한다. 트랩은 열개가 발달한 서부에서는 단층들에 의한 구조 트랩이 우세하고, 깊이 처진 형태의 분지인 동부에는 습곡에 의해 형성된 돔 구조들이 발달한다. 아직까지 뚜렷한 성공은 없었으나 고생대 탄산염 암초, 암염 유동과 연관된 트랩, 융기 및 삭박에 따른 층서 및 구조 트랩 등도 유망하다.
키워드
북극
바렌츠 해
석유 시스템
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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 : 48
  • No :4
  • Pages :499-523
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