张国涛;张尚锋;李媛;王振奇;

• 1:长江大学油气资源与勘探技术教育部重点实验室

• 2:中国地质大学资源学院

摘要(Abstract)：

尼日尔下陆坡深水区的水道发育具多期次特征,内部结构与外形复杂多变,其地理位置与沉积环境不利水道体系的研究.通过地层切片、RMS振幅属性等方法展示不同时间单元水道形态,分析水道体系的期次变换与内部结构的变形过程,探讨水道体系的迁移演化历史.结果表明:中新世中期多发育孤立水道,晚期二级海平面大幅度下降引发大规模浊积事件,促使大量加积式水道形成,在平直处以垂向加积为主,弯曲处呈现垂向加积同时伴随侧向迁移特征.水道演化大致可分为3个阶段:初始侵蚀、切割与充填交替进行、废弃阶段,伴随3个阶段水道弯度发生由中到高再下降的变化.水道的交互式切割与充填基本贯穿第2阶段,切割与充填作为水道弯曲变形一对驱动力,使水道在平面上发生3种迁移方式:侧向摆动、下行迁移、侧向与下行混合迁移.

关键词(KeyWords)：尼日尔深水区;水道;3D地震属性;几何形态;迁移

Abstract:

Keywords:

基金项目(Foundation):“十一五”国家科技重大专项(2008ZX05030-03-01)

作者(Author):张国涛;张尚锋;李媛;王振奇;

Email:

参考文献(References)：

• [1]吴时国,秦蕴珊.南海北部陆坡深水沉积体系研究[J].沉积学报,2009,27(5):922-930.

• [2]袁圣强,吴时国,姚根顺.琼东南陆坡深水水道主控因素及勘探应用[J].海洋地质与第四纪地质,2010,30(2):61-66.

• [3]Posamentier H W,Kolla V.Seismic geomorphology and stratigraphy of depositional elements in deep-water settings[J].Journal ofSedimentary Research,2003,73(3):367-388.

• [4]Cross N E,Cunningham A,Cook R J,et al.Three-dimensional seismic geomorphology of a deep-water slope-channel system:The Se-quoia field,offshore west Nile Delta,Egypt[J].AAPG Bulletin,2009,93(8):1063-1086.

• [5]Deptuck M E,Sylvester Z,Pirmez C,et al.Migration-aggradation history and 3-D seismic geomorphology of submarine channels inthe Pleistocene Benin-major Canyon,western Niger Delta slope[J].Marine and Petroleum Geology,2007,24(6/9):406-433.

• [6]Mchargue T,Webb J E.Internal geometry,seismic facies,and petroleum potential of canyons and inner fan channels of the Indus sub-marine fan[J].American association of petroleum geologists bulletin,1986,70:161-180.

• [7]Sawyer D E,Flemings P B,et al.Seismic geomorphology,lithology,and evolution of the late Pleistocene Mars-Ursa turbidite region,Mississippi Canyon area,northern Gulf of Mexico[J].AAPG Bulletin,2007,90(2):215-234.

• [8]付彦辉,吕福亮,袁圣强,等.琼东南盆地陆坡区深水浊积水道的地震相特征[J].热带海洋学报,2009,28(4):87-92.

• [9]Deptuck M E,Steffens G S,Barton M,et al.Architecture and evolution of upper fan channel-belts on the Niger Delta slope and in theArabian Sea[J].Marine and Petroleum Geology,2003,20(6/8):649-676.

• [10]HeiniP,Davies R J.Knickpoint migration in submarine channels in response to fold growth,western Niger Delta[J].Marine andPetroleum Geology,2007,24(6/9):434-449.

• [11]Mascle J B B R D.Diapiric structures off Niger delta[J].AAPG Bulletin,1973,57(9):1672-1678.

• [12]吕明,王颖,陈莹.尼日利亚深水区海底扇沉积模式成因探讨及勘探意义[J].中国海上油气,2008,20(4):275-282.

• [13]冯志强.泰国湾第四纪层序建造与河流演化特征[J].大庆石油学院学报,2001,25(3):14-19.

• [14]Catuneanu O.Principles of sequence stratigraphy[M].UK:Elsevier,2006.

• [15]Schwab A M,Cronin B T,Ferreira H.Seismic expression of channel outcrops:Offset stacked versus amalgamated channel systems[J].Marine and Petroleum Geology,2007,24(6/9):504-514.

• [16]Abreu V,Sullivan M,Pirmez C,et al.Lateral accretion packages(LAPs):An important reservoir element in deep water sinuouschannels[J].Marine and Petroleum Geology,2003,20(6/8):631-648.

• [17]De Ruig M J,Hubbard S M.Seismic facies and reservoir characteristics of a deepúmarine channel belt in the Molasse foreland basin,Puchkirchen Formation,Austria[J].AAPG Bulletin,2006,90(5):735-752.