深水水道沉积体系及地震识别特征研究
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摘要
<正>深水水道作为输送陆源碎屑沉积物到深海盆地的重要通道,对沉积物起到约束和分类作用。通过研究深水水道的沉积与演化过程可进一步对深海盆地沉积物源进行分析。通常,在水道轴部沉积粗粒沉积物,堤坝部位沉积细砂、粉砂和泥等细粒沉积物,水道沉积体系可作为很好的油气储集体。研究表明,深水水道具有复杂的内部结构、多次侵
A deepwater channel complex sedimentary system developed on or beneath slope,and on basin floor.Deepwater channels act as important conduits for transporting terrigenous detrital materials to deepwater basin,and control the formation and evolution of deepwater sedimentary systems.Generally,a deepwater channel complexforms during the periodt of a relative low stand of sea level,when large volumes of coarse-grained sediment erode the slope and deposit on basin floor.The internal fill is often quite complex,and the nature of channel-fill deposits varies greatly. Deepwater chanels tend to develop a smooth longitudinal upconcavity that is balanced between erosion and deposition.Based on 2D seismic data and stratigraph,we recognized a central deepwater channel complex sedimentary system,which probably formed during the early Pliocene at 5.0 Ma in Qiongdongnan Basin northern South China Sea.On seismic reflection profiles,the studied channels present an overall"U"or"V"shape and middle-high-amplitude continual seismic phase.Combining the lithologic layering from drilling well and the published channel filling model, we constructed a model of the studied channel complex and found that most of them were sandstone-rich aggradational channel-fill patterns.the deepwater channel complex can act as good hydrocarbon reservoirs.
A deepwater channel complex sedimentary system developed on or beneath slope,and on basin floor.Deepwater channels act as important conduits for transporting terrigenous detrital materials to deepwater basin,and control the formation and evolution of deepwater sedimentary systems.Generally,a deepwater channel complexforms during the periodt of a relative low stand of sea level,when large volumes of coarse-grained sediment erode the slope and deposit on basin floor.The internal fill is often quite complex,and the nature of channel-fill deposits varies greatly. Deepwater chanels tend to develop a smooth longitudinal upconcavity that is balanced between erosion and deposition.Based on 2D seismic data and stratigraph,we recognized a central deepwater channel complex sedimentary system,which probably formed during the early Pliocene at 5.0 Ma in Qiongdongnan Basin northern South China Sea.On seismic reflection profiles,the studied channels present an overall"U"or"V"shape and middle-high-amplitude continual seismic phase.Combining the lithologic layering from drilling well and the published channel filling model, we constructed a model of the studied channel complex and found that most of them were sandstone-rich aggradational channel-fill patterns.the deepwater channel complex can act as good hydrocarbon reservoirs.
引文
Carlos P,Jasim I.2003.Reconstruction of turbidity currents in Amazon Channel.Marine and Petroleum Geology,20(6-8): 823-849
Deptuck M E,Steffens G S,Barton M et al.2003.Architecture and evolution of upper fan channel-belts on the Niger Delta slope and in the Arabian Sea.Marine and Petroleum Geology,20(6-8):649-676
Heinio P,Davies R J.2007.Knickpoint migration in submarine channels in response to fold growth,western Niger Delta. Marine and Petroleum Geology,24(6-9):434-449
Kolla V.2007.A review of sinuous channel avulsion patterns in some major deep-sea fans and factors controlling them. Marine and Petroleum Geology,24(6-9):450-469
Kolla V,Posamentier H W,Wood L J.2007.Deep-water and fluvial sinuous channels-characteristics,similarities and dissimilarities,and modes of formation.Marine and Petroleum Geology,24(6-9):388-405
Mayall M,Jones E,Casey M.2006.Turbidite channel reservoirs-key elements in facies prediction and effective development.Marine and Petroleum Geology,23(8):821-841
Popescu I,Lericolais G,Panin N et al.2001.Late Quaternry channel avulsions on the Danube deep-sea fan.Marine Geol, 179(1-2):25-37
Posamentier H W,Kolla V.2003.Seismic geomorphology and stratigraphy of depositional elements in deep-water settings. Journal of Sedimentary Research,73(3):367-388
Schwab A M,Cronin B T,Ferreira H.2007.Seismic expression of channel outcrops:Offset stacked versus amalgamated channel systems.Marine and Petroleum Geology,24(6-9):504-514
Stow D A,Mayall M.2000.Deep-water sedimentarysystems:new models for the 21st century.Marine and Petroleum Geology,17(2):125-135
Straub K M,Mohrig D,MoElroy B,et al.2008.Interactions between turbidity currents and topography in aggrading sinuous submarine channels:a laboratory study.GSA Bulletin,120:368-385
Weimer P,Slatt R M.2004.Petroleum geology of deepwater settings.AAPG Studies in Geology 57 AAPG/Datapages Discovery Series 8,AAPG/Datapages Tulsa,OK,USA.172-174
Wynn R B,Cronin B T,Peakall J.2007.Sinuous deep-water channels:genesis,geometry and architecture.Marine and Petroleum Geology,24(6-9):341-387
Yuan S Q,Lv F L,Wu S G et al.2009.Seismic stratigraphy of the Qiongdongnan deep sea channel,Northwestern South China Sea.Chinese Journal of Oceanology and Limnology,27(2):250-259
Yuan S Q,Yao G S,Lv F L et al.2009.Features of late cenozoic deepwater sedimentation in Southern Qiongdongnan Basin, Northwestern South China Sea.Journal of China University of Geosciences,20(1):172-179
Deptuck M E,Steffens G S,Barton M et al.2003.Architecture and evolution of upper fan channel-belts on the Niger Delta slope and in the Arabian Sea.Marine and Petroleum Geology,20(6-8):649-676
Heinio P,Davies R J.2007.Knickpoint migration in submarine channels in response to fold growth,western Niger Delta. Marine and Petroleum Geology,24(6-9):434-449
Kolla V.2007.A review of sinuous channel avulsion patterns in some major deep-sea fans and factors controlling them. Marine and Petroleum Geology,24(6-9):450-469
Kolla V,Posamentier H W,Wood L J.2007.Deep-water and fluvial sinuous channels-characteristics,similarities and dissimilarities,and modes of formation.Marine and Petroleum Geology,24(6-9):388-405
Mayall M,Jones E,Casey M.2006.Turbidite channel reservoirs-key elements in facies prediction and effective development.Marine and Petroleum Geology,23(8):821-841
Popescu I,Lericolais G,Panin N et al.2001.Late Quaternry channel avulsions on the Danube deep-sea fan.Marine Geol, 179(1-2):25-37
Posamentier H W,Kolla V.2003.Seismic geomorphology and stratigraphy of depositional elements in deep-water settings. Journal of Sedimentary Research,73(3):367-388
Schwab A M,Cronin B T,Ferreira H.2007.Seismic expression of channel outcrops:Offset stacked versus amalgamated channel systems.Marine and Petroleum Geology,24(6-9):504-514
Stow D A,Mayall M.2000.Deep-water sedimentarysystems:new models for the 21st century.Marine and Petroleum Geology,17(2):125-135
Straub K M,Mohrig D,MoElroy B,et al.2008.Interactions between turbidity currents and topography in aggrading sinuous submarine channels:a laboratory study.GSA Bulletin,120:368-385
Weimer P,Slatt R M.2004.Petroleum geology of deepwater settings.AAPG Studies in Geology 57 AAPG/Datapages Discovery Series 8,AAPG/Datapages Tulsa,OK,USA.172-174
Wynn R B,Cronin B T,Peakall J.2007.Sinuous deep-water channels:genesis,geometry and architecture.Marine and Petroleum Geology,24(6-9):341-387
Yuan S Q,Lv F L,Wu S G et al.2009.Seismic stratigraphy of the Qiongdongnan deep sea channel,Northwestern South China Sea.Chinese Journal of Oceanology and Limnology,27(2):250-259
Yuan S Q,Yao G S,Lv F L et al.2009.Features of late cenozoic deepwater sedimentation in Southern Qiongdongnan Basin, Northwestern South China Sea.Journal of China University of Geosciences,20(1):172-179
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