DOI: 10.1306/02011211088
Scopus记录号: 2-s2.0-84866858682
论文题名: Normal faults and gas migration in an active plate boundary, southernTaranaki Basin, offshore New Zealand
作者: Ilg B.R. ; Hemmings-Sykes S. ; Nicol A. ; Baur J. ; Fohrmann M. ; Funnell R. ; Milner M.
刊名: AAPG Bulletin
ISSN: 0149-1740
EISSN: 1558-9470
出版年: 2012
发表日期: 2012
卷: 96, 期: 9 起始页码: 1733
结束页码: 1756
语种: 英语
Scopus关键词: Cretaceous source rock
; Fault tips
; Flowthrough
; Gas migration
; High density
; Hydrocarbon expulsion
; Lateral Flow
; Low permeability
; New zealand
; Normal faults
; Plate boundaries
; Relay ramps
; Chimneys
; Flow of gases
; Hydrocarbons
; Faulting
; Cretaceous
; faulting
; gas flow
; gas transport
; hydrocarbon migration
; hydrocarbon seep
; mudstone
; normal fault
; offshore application
; Oligocene
; permeability
; plate boundary
; sealing
; seismic data
; seismic reflection
; source rock
; spatial distribution
; New Zealand
; Pacific Ocean
; Taranaki Basin
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: The function of normal faults in upsequence flow of gas has been examined using two-dimensional and three-dimensional seismic-reflection data from the southern Taranaki Basin, New Zealand. The spatial distributions of late-stage normal faults, gas chimneys, thickness of the Oligocène mudstone-rich seal (Otaraoa Formation), and modeled hydrocarbon expulsion volumes are compared. Gas chimneys are most common above Cretaceous source rocks modeled to have expelled hydrocarbons. Most (∼70%) of the observed gas chimneys follow, and/ or are rooted in, late-stage normal faults. These faults are the primary seal bypass mechanism for hydrocarbons, where they displace the seal (or intersect faults that displace the seal) and the seal is thick (e.g., more than ∼340 m [∼1115 ft]). Active vertical gas flow through the seal commenced after the onset of faulting (∼3.6 Ma), whereas subseal lateral flow started significantly earlier at approximately 15 Ma and resulted in an early charge of structural highs. Gas flow up along faults in low-permeability mudstones (<1 md) is channelized with steep chimneys commonly occurring close to fault tips and relay ramps. In these cases, gas flow may be focused by the presence of high densities of open fractures locally elevating upsequence bulk permeabilities to approximately 1 to 400 md. Copyright ©2012. The American Association of Petroleum Geologists. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84866858682&doi=10.1306%2f02011211088&partnerID=40&md5=f3016cc1b46852df89f2147a364cba4b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13310
Appears in Collections: 过去全球变化的重建 影响、适应和脆弱性 科学计划与规划 气候变化与战略 全球变化的国际研究计划 气候减缓与适应 气候变化事实与影响
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Recommended Citation:
Ilg B.R.,Hemmings-Sykes S.,Nicol A.,et al. Normal faults and gas migration in an active plate boundary, southernTaranaki Basin, offshore New Zealand[J]. AAPG Bulletin,2012-01-01,96(9)