DOI: 10.1306/08291111023
Scopus记录号: 2-s2.0-84860759200
论文题名: Temporal and lateral variation in the development of growth faults and growth strata in western Niger Delta, Nigeria
作者: Khani H.F. ; Back S.
刊名: AAPG Bulletin
ISSN: 0149-1777
EISSN: 1558-9507
出版年: 2012
发表日期: 2012
卷: 96, 期: 4 起始页码: 595
结束页码: 614
语种: 英语
Scopus关键词: Depositional system
; Fault activity
; Fault blocks
; Fault growth
; Fault migration
; Fault movement
; Fault trend
; Fault zone
; Growth fault
; Growth strata
; Hydrocarbon migration
; Isopach maps
; Lateral growth
; Lateral variations
; Niger Delta
; Nigeria
; Progradation
; Regional scale
; Sediment accumulation
; Sedimentary records
; Seismic datas
; Study areas
; Syndepositional faults
; Faulting
; Hydrocarbons
; Loading
; Petroleum reservoir evaluation
; Sedimentology
; Sediments
; Stratigraphy
; Backstepping
; array
; correlation
; depositional environment
; fault zone
; faulting
; geoaccumulation
; growth rate
; hydrocarbon migration
; sedimentation
; subsurface flow
; temporal variation
; three-dimensional modeling
; Niger Delta
; Nigeria
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: This study examines eight syndepositional faults and syntectonic sediments in five major fault blocks in western Niger Delta, offshore Nigeria, on three-dimensional seismic data. The initiation, lateral growth and retreat, periods of activity and quiescence, and decay of faulting around these blocks can be ascertained by analyzing a series of time-structure and isopach maps. The study area can be subdivided into three structural zones. The first structural zone is a northwestern zone characterized by a major counterregional growth fault in the deep subsurface. This deep-seated structure is superposed by an array of younger regional growth faults displacing a kilometerthick sedimentary overburden that accumulated on the former footwall. The second structural zone is a central to eastern zone that seems mostly unaffected by young deltaic faulting. This zone is characterized by the thinnest sedimentary record of the study area. The third structural zone is a southeastern zone that is dominated by a large, listric, backstepping master fault zone associated with a kilometer-scale rollover system. Regional structural and stratigraphie analyses document an apparently strong relationship between syntectonic sedimentation and syndepositional fault activity in that phases of significant fault activity, lateral fault growth, and fault migration concur with major depositional phases; in turn, areas and intervals characterized by the least sediment accumulation also record the lowest fault activity. However, one particularity of the studied system is that it underwent at least one period of seaward fault progression that coincided with a backstepping of faulting on the landward side. Although the forward stepping of faulting near the delta front can be interpreted as the consequence of the progressive loading during delta progradation, the contemporaneous backstepping of faulting further inboard likely reflects the sustained lateral growth of mature deltaic faults into previously undeformed proximal parts of the depocenter. The results of this study, thus, document that although an apparent correlation with the superimposed depositional system exists on a regional scale, inboard deltaic faults may persist to grow irrespective of sedimentary loading. The recognition of such fault trends is particularly important for estimating the influence of late-stage fault movement on hydrocarbon migration or the discovery of subtle fault-controlled hanging-wall reservoirs. Copyright ©2012. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84860759200&doi=10.1306%2f08291111023&partnerID=40&md5=9a87cc6cb083ec0a921d074ad4b5a293
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13347
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:
Khani H.F.,Back S.. Temporal and lateral variation in the development of growth faults and growth strata in western Niger Delta, Nigeria[J]. AAPG Bulletin,2012-01-01,96(4)